Our Products

PPG Series

Features:

• Glass coated platinum element
• Capable of withstanding temperatures ranging from -50°C to +500°C. Higher temperature ratings are available by special order
• High accuracy: Resistance and temperature deviation can be controlled to within ±0.06% and ±0.15°C, a tolerance that corresponds to Class “A” of IEC 751 or 1/2 DIN of DIN 43760
• High Reliability: Capable of withstanding extreme environmental conditions

Options:

• Available in various configurations for specific applications
• Non-Standard Resistance Values and Tolerances

PPGxxxJx Series

Features:

• Glass coated platinum element
• Capable of withstanding temperatures ranging from -70°C to +500°C
• High accuracy: Resistance and temperature deviation can be controlled to within ±0.06% and ±0.15°C, a tolerance that corresponds to Class “A” or Class “F 0.15” of DIN EN 60751 (Class A products only)
• High Reliability: Capable of withstanding extreme environmental conditions

Applications:

• Industrial water meters and heat meters
• Cold chain and cold storage

KC series

Features:

• Kynar insulated lead wires
• Low cost
• High reliability
• Epoxy encapsulated
• Small size
• Fast thermal response time

Options: 

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Rated to +135°C maximum operating temperature (R-T Curve “B” devices limited to +100°C Max.)

LC series

Features:

• Low cost
• High reliability
• Epoxy encapsulated
• Small size
• Fast thermal response time

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Rated to +150°C maximum operating temperature (R-T Curve “B” devices limited to +100°C Max.)

SC series

Features:

• Low cost
• High reliability
• Epoxy encapsulated
• Small size
• Fast thermal response time

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Rated to +150°C maximum operating temperature (R-T Curve “B” devices limited to +100°C Max.)

TC series

Features:

• Teflon insulated lead wires
• Low cost
• High reliability
• Epoxy encapsulated
• Small size
• Fast thermal response time

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Rated to +150°C maximum operating temperature (R-T Curve “B” devices limited to +100°C Max.)

AC series

Features:

• Low cost
• Excellent stability
• Small size
• Epoxy encapsulated
• Fast thermal response time

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 3 seconds max. in a well stirred oil bath, 15 seconds nom. in still air
• Dissipation constant: 2 mW/°C
• Rated to +125°C maximum operating temperature

DC series

Features:

• Low cost
• High stability
• Small size
• Epoxy encapsulated
• Fast thermal response time

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances
• Point matched at specified temperatures

Specifications:

• Thermal time constant: 2 seconds max. in a well stirred oil bath, 15 seconds max. in still air
• Dissipation constant: 3 mW/°C
• Rated to +150°C maximum operating temperature (R-T Curve “B” devices limited to +100°C Max.)

GQ Series

Features:

• High temperature up to +300°C
• High stability
• Solderable lead wires
• Fast thermal response time

Options:

• Non-standard resistance values and tolerances

Specifications:

• 0.140” maximum diameter

GR Series

Features:

• High temperature up to +300°C
• High stability
• Solderable lead wires
• Fast thermal response time

Options:

• Non-standard resistance values and tolerances

Specifications:

• 0.090” maximum diameter

GS Series

Features:

• High temperature up to +300°C
• High stability
• Solderable lead wires
• Fast thermal response time

Options:

• Non-standard resistance values and tolerances

Specifications:

• 0.060” maximum diameter

GT Series

Features:

• High temperature up to +300°C
• High stability
• Solderable lead wires
• Fast thermal response time

Options:

• Non-standard resistance values and tolerances

Specifications:

• 0.039” maximum diameter

DO-34 Standard

Features:

• High temperature capability to 300°C
• Hermetically sealed glass package
• Low cost
• Excellent long-term stability
• High voltage insulation
• Tinned CCS lead wires are solderable or weldable

Options:

• Non-standard resistance values and tolerances
• Point matched at specified temperatures
• Tape and reel packaging

Specifications:

• Thermal time constant: 5 seconds max (still air)
• Thermal time constant: 0.5 seconds max (stirred liquid)
• Dissipation constant: 2 mW/°C (still air)

JL Series

Features:

• High temperature capability to +300°C
• Hermetically sealed glass package
• High accuracy
• Low cost
• Excellent long-term stability
• High voltage insulation
• Tinned CCS lead wires are solderable or weldable

Options:

• Special lead forms
• Non-standard resistance values and tolerances
• Point matched at specified temperatures
• Tape and reel packaging

Specifications:

• Interchangeability accuracy of ±0.5°C (0°C to +100°C)
• Thermal time constant: 5 seconds (still air)
• Thermal time constant: 0.5 seconds (stirred liquid)
• Dissipation constant: 2 mW/°C (still air)

JM Series

Features:

• High temperature capability to +300°C
• Hermetically sealed glass package
• High accuracy
• Low cost
• Excellent long-term stability
• High voltage insulation
• Tinned CCS lead wires are solderable or weldable

Options:

• Special lead forms
• Non-standard resistance values and tolerances
• Point matched at specified temperatures
• Tape and reel packaging

Specifications:

• Interchangeability accuracy of ±1.0°C (0°C to +100°C)
• Thermal time constant: 5 seconds (still air)
• Thermal time constant: 0.5 seconds (stirred liquid)
• Dissipation constant: 2 mW/°C (still air)

DO-35 Standard

Features:

• High temperature capability to +300°C
• Hermetically sealed glass package
• Low cost
• Excellent long-term stability
• High voltage insulation
• Tinned CCS lead wires are solderable or weldable

Options:

• Special lead forms
• Non-standard resistance values and tolerances
• Point matched at specified temperatures
• Tape and reel packaging

Specifications:

• Thermal time constant: 5 seconds (still air)
• Thermal time constant: 0.5 seconds (stirred liquid)
• Dissipation constant: 2 mW/°C (still air)

USUG1000 Series

Features:

• Temperature rating = -40 to +150°C
• Hermetically sealed glass package
• Excellent long-term stability
• Tinned CCS lead wires are solderable or weldable

Specifications:

• Resistance temperature curve = “J”
• Dissipation constant = 2mW/°C nominal (still air)
• Maximum power rating = 20 mW
• UL File Number E232830 (UL Category XGPU2)

DO-41 Standard

Features:

• High temperature capability to +300°C
• Hermetically sealed glass package
• Low cost
• Excellent long-term stability
• High voltage insulation
• Tinned CCS lead wires are solderable or weldable

Options:

• Non-standard resistance values and tolerances
• Point matched at specified temperatures
• Tape and reel packaging

Specifications:

• Thermal time constant: 8 seconds max (still air)
• Thermal time constant: 2 seconds max (stirred liquid)
• Dissipation constant: 3 mW/°C (still air)

GL Series

Features:

• High temperature capability to +300°C
• Excellent long term stability
• High reliability
• Solderable lead wires
• Fast thermal response time

Options:

• Non-standard resistance values and tolerances
• Two glass body lengths (.500″ and 1.000″)

Specifications:

• 0.070″ Diameter

KW Series

Features:

• Kynar insulated lead wires
• High accuracy
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±0.5°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mw/°C
• Maximum power rating: 30 mw at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +135°C
• Storage and operation temperatures for best long-term stability: -80° to +120°C

KX Series

Features:

• Kynar insulated lead wires
• High accuracy
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±1.0°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mw/°C
• Maximum power rating: 30 mw at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +135°C
• Storage and operation temperatures for best long-term stability: -80° to +120°C

PW Series

Features:

• High accuracy
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±0.5°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mw/°C
• Maximum power rating: 30 mw at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +150°C
• Storage and operation temperatures for best long-term stability: -80° to +120°C

PX Series

Features:

• High accuracy
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R-T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±1.0°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mw/°C
• Maximum power rating: 30 mw at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +150°C
• Storage and operation temperatures for best long-term stability: -80° to +120°C

KS Series

Features:

• High accuracy
• Kynar insulated lead wire
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±0.1°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Maximum power rating: 30 mW at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +135°C
• Storage and operation temperatures for best long-term stability: -80° to +75°C

KT Series

Features:

• High accuracy
• Kynar insulated lead wire
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±0.2°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Maximum power rating: 30 mW at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +135°C
• Storage and operation temperatures for best long-term stability: -80°C to +120°C

PS Series

Features:

• High accuracy
• Fast thermal response
• Low cost
• Small size
• Epoxy encapsulated
• High stability
• Long life
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Maximum power rating: 30 mW at 25°C derated to 1 mW at 125°C
• Interchangeability tolerance of ±0.1°C or ±0.2°C from 0-70°C
• Operating temperature: -80°C to +150°C
• Storage and operation temperatures for best long term stability: -80° to +75°C

PT Series

Features:

• High accuracy
• Fast thermal response time
• Low cost
• Small size
• Epoxy encapsulated
• Excellent long-term stability
• R/T Curve-matched

Options:

• Special lead materials and lengths
• Special encapsulants or probe housings
• Non-standard resistance values and tolerances

Specifications:

• Interchangeability accuracy of ±0.2°C (0°C to +70°C)
• Thermal time constant: 1 second max. in a well stirred oil bath, 10 seconds max. in still air
• Dissipation constant: 1 mW/°C
• Maximum power rating: 30 mW at 25°C derated to 1 mW at 125°C
• Operating temperature range: -80°C to +150°C
• Storage and operation temperatures for best long-term stability: -80° to +120°C

ST Series

Maximum Steady State Inrush Current (Imax)

• For inrush current limiters, the maximum continuous steady state current, either DC or RMS AC, which the device is capable of passing. The maximum steady state current for a Littelfuse inrush current limiter is determined assuming a maximum operating ambient temperature of 65°C. If a specific application requires ambient temperature operation above 65°C, custom designed devices are available.

Resistance At Maximum Inrush Current (RImax)

• For inrush current limiters, the approximate resistance of the device under maximum steady state current conditions.

USP10979

Features:

• Tight Tolerance
• Mounting Flange with #6 Stud Mounting Holes
• Moisture Resistant
• 105°C Max Operating Temperature

USP12836

Features:

• Tight Tolerance
• Flange with 0.177″ Dia Mounting Hole
• PVC Zip Cord Lead Wire
• 105°C Max Operating Temperature

USP9728

Features:

• Tight Tolerance
• Flange with Two #6 Mounting Holes
• Glass Braid Insulated, Glass Braid Jacketed Cable
• Molex Connectors
• High Temperature Capability to 300°C

H1060

• Stainless Steel, Round Flange Housing

H15348

• Plastic Housing with Round Flange

H15356

• Stainless Steel, Square Flange Housing

H15951

• Plastic Housing with Round Flange

H3535

• Stainless Steel, Round Flange Housing

H3783

• Stainless Steel, Rectangle Flange Housing

H3964

• Aluminium, Round Flange Housing

H6245

• Plastic Tree Rivet with Stainless Steel Probe Tip

H7232

• Stainless Steel with Round Flange

H3457

• Fast Response Micro-Probe

USP3021

Features:

• Temperature Standard
• Supplied with NIST Traceable Calibration Cert
• 105°C Max Operating Temperature

USP3986

Features:

• Temperature Standard
• Supplied with NIST Traceable Calibration Cert
• 105°C Max Operating Temperature

USP12837

Features:

• Tight Tolerance
• Small Size (0.020″ Dia)
• Poly-Nylon Insulated Lead Wire
• 125°C Max Operating Temperature

USP10680

Features:

• High Accuracy
• PVC Insulated Zip Cord
• 105°C Max Operating Temperature

USP10975

Features:

• Tight Tolerance
• Kynar Insulated Lead Wire
• 125°C Max Operating Temperature

USP10982

Features:

• Tight Tolerance
• Moisture Resistant
• PVC Insulated Lead Wire
• 80°C Max Operating Temperature

USP11493

Features:

• High Accuracy
• PVC Insulated Zip Cord
• 105°C Max Operating Temperature

USP12838

Features:

• Tight Tolerance
• PVC Insulated Lead Wire
• 80°C Max Operating Temperature

USP14439

Features:

• High Accuracy
• Small Size
• Two Conductor PVC Insulated Lead Wire

USP14579

Features:

• Positive Temperature Coefficient (PTC) Thermistor
• Teflon Insulated Lead Wire
• 105°C Max Operating Temperature

USP17957

Features:

• Positive Temperature Coefficient (PTC) Thermistor
• Teflon Insulated Lead Wire
• 105°C Max Operating Temperature

USP4065

Features:

• High Accuracy
• PVC Insulated Zip Cord
• 100°C Max Operating Temperature

USP7537

Features:

• High Accuracy
• Small Size
• Kynar Insulated Lead Wire
• 80°C Max Operating Temperature

USP16673

Features:

• Tight Tolerance
• Ultra Thin
• 90°C Max Operating Temperature

USP10972

Features:

• Tight Tolerance
• Moisture Resistant
• PVC Insulated Zip Cord
• 105°C Max Operating Temperature

USP11491

Features:

• High Accuracy
• Teflon Insulated Lead Wire
• 150°C Max Operating Temperature

USP12920

Features:

• Tight Tolerance
• High Temperature Capability to 300°C
• Glass Braid Insulated, Glass Braid Jacketed Cable

USP3275

Features:

• Pointed Probe Tip
• Teflon Insulated Lead Wire
• 105°C Max Operating Temperature

USP7806

Features:

• PFA Insulated Lead Wire
• 150°C Max Operating Temperature

USP8528

Features:

• High Accuracy
• Stainless Steel Spring Strain Relief
• PFA Insulated Lead Wire
• 125°C Max Operating Temperature

TO-220 Package Thermistor

Littelfuse offers TO220 probe assemblies suitable for a wide range of temperature sensing applications. If the electrical characteristics on this product won’t work for your requirements, please contact us for further assistance.

Options:

• Non-standard resistance values and tolerances

USP10973

Features:

• Tight Tolerance
• Moisture Resistant
• PVC Insulated Lead Wire
• 105°C Max Operating Temperature

USP10976

Features:

• Tight Tolerance
• #6 Mounting Hole
• Teflon Insulated Lead Wire
• 150°C Max Operating Temperature

USP18967

Features:

• Tight Tolerance
• Moisture Resistant
• Supplied with a Copper Plated Clip designed to affix to a 0.875″ Diameter Pipe
• 105°C Max Operating Temperature

USP4261

Features:

• Tight Tolerance
• #6 Mounting Hole
• PVC Insulated Lead Wire
• 105°C Max Operating Temperature

USP5510

Features:

• High Accuracy
• #6 Mounting Hole
• Teflon Insulated Lead Wire
• 150°C Max Operating Temperature

USP6295

Features:

• #4 Mounting Hole
• Kynar Insulated Lead Wire
• 125°C Max Operating Temperature

USP6998

Features:

• 1/4″ Mounting Hole
• Teflon Insulated Lead Wire
• Harwin Connector Assembly
• 150°C Max Operating Temperature

USP7570

Features:

• #6 Mounting Hole
• Teflon Insulated Lead Wire

USP7765

Features:

• Tight Tolerance
• Moisture Resistant
• UL1015 Style Lead Wire
• 105°C Max Operating Temperature

USP7766

Features:

• Tight Tolerance
• Moisture Resistant
• Supplied with three Copper Plated Mounting Clips
• 105°C Max Operating Temperature

USP8798

Features:

• Tight Tolerance
• Moisture Resistant
• Supplied with a Copper Plated Clip designed to affix to a 0.250″ Diameter Pipe
• 105°C Max Operating Temperature

USUR1000 Series

Features:

• Insulated lead wire rated for 300V minimum
• User selectable lead length
• Ring tongue mounting hole diameter = 0.145″ nominal
• Ring tongue mounting hole stud size = #6

Specifications:

• Resistance temperature curve = “J”
• Resistance tolerances from ±2% to ±10% available
• Temperature rating = -40°C to +125°C
• UL File Number E232830 (UL Category XGPU2)

USP10978

Features:

• Tight Tolerance
• 1/4″-18 NPT Thread
• PVC Insulated Lead Wire
• 105°C Max Operating Temperature

USP10981

Features:

• Tight Tolerance
• Moisture Resistant
• PVC Insulated Zip Cord
• 105°C Max Operating Temperature

USP10997

Features:

• 1/8″-27 NPT Thread
• PVC Insulated Lead Wire
• 105°C Max Operating Temperature

USP12755

Features:

• 5/16″-24 UNJF-3A Thread
• PVC Insulated Lead Wire
• 105°C Max Operating Temperature

USP12840

Features:

• Tight Tolerance
• 10-32 Threaded Hex Head
• Kynar Insulated Lead Wire
• 125°C Max Operating Temperature

USP3121

Features:

• 6-32 Thread
• Kynar Insulated Lead Wire
• 125°C Max Operating Temperature