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Product Detailed Parameters
- Description：ICL 20 OHM 20% 1.75A 12.7MM
- Series：ST
- Mfr：Littelfuse Inc.
- Package：Bulk
- R @ 25°C：20 Ohms
- Tolerance：±20%
- Current - Steady State Max：1.75 A
- R @ Current：600 mOhms
- Diameter：0.500" (12.70mm)
- Lead Spacing：0.310" (7.87mm)
- Grade：-
- Qualification：-
- Approval Agency：-
Download product information
Overview
The Littelfuse ST20002B is a power thermistor inrush current limiter designed to reduce initial surge currents during equipment power-on. It features a nominal resistance of 20 Ohms with a tolerance of ±20% at 25°C. The device supports a maximum steady-state current of 1.75 A and utilizes an axial leaded package with a body diameter of 0.500 inches (12.70 mm) and a lead spacing of 0.310 inches (7.87 mm).
Feature Summary
- Reduces initial surge current when electronic equipment is powered on.
- Provides overcurrent protection for electronic devices.
- Utilizes power thermistor technology for inrush limiting.
Applications
- Inrush current limiting in electronic circuits.
- Overcurrent protection applications.
Procurement Notes
Verify component status as the ST20002B may be obsolete or no longer manufactured by Littelfuse Inc. Confirm availability through authorized distributors and check for valid replacement part numbers if this specific model is discontinued. Ensure compliance with RoHS standards and moisture sensitivity level requirements before procurement.
Selection Notes
Select this component based on its 20 Ohm nominal resistance and 1.75 A steady-state current rating. Consider the axial leaded package dimensions for PCB layout compatibility. Verify that the thermal characteristics and resistance tolerance meet the specific circuit design requirements for inrush current suppression.
Part Context
The ST20002B belongs to the Littelfuse family of power thermistors and inrush current limiters. These components are engineered to protect sensitive electronic circuits from high initial charging currents, ensuring reliable operation during power-up sequences in various industrial and consumer electronics applications.
Replacement Considerations
Public confirmed substitute part numbers are not available in the provided documentation. Consult Littelfuse official resources for compatible replacements if this model is discontinued.
FAQ
What is the nominal resistance value of the ST20002B?
The nominal resistance is 20 Ohms with a tolerance of ±20% at 25°C.
What is the maximum steady-state current rating?
The maximum steady-state current is 1.75 A.
