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Product Detailed Parameters
- Description：ICL 30 OHM 20% 2A 13.97MM
- Series：ST
- Mfr：Littelfuse Inc.
- Package：Bulk
- R @ 25°C：30 Ohms
- Tolerance：±20%
- Current - Steady State Max：2:00 AM
- R @ Current：700 mOhms
- Diameter：0.550" (13.97mm)
- Lead Spacing：0.200" (5.08mm)
- Grade：-
- Qualification：-
- Approval Agency：-
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Overview
The ST30002B is a radial lead inrush current limiter (ICL) manufactured by Littelfuse Inc. It features a nominal resistance of 30 Ohms with a tolerance of ±20% at 25°C. The device is rated for a steady-state current of 2 Amperes and utilizes a 13.97mm (0.550-inch) body diameter. Key electrical parameters include a maximum residual resistance of 700 mOhms and a lead spacing of 5.08mm (0.200 inches).
Feature Summary
- Provides effective limitation of high inrush currents during power-up sequences.
- Utilizes negative temperature coefficient characteristics to reduce resistance after initial surge.
- Designed for reliable circuit protection against transient current spikes.
Applications
- Power supply input stages
- Transformer primary circuits
- Capacitive load switching
Procurement Notes
Verify the specific Littelfuse datasheet for the 369 series or relevant ICL documentation to confirm thermal derating curves and mechanical dimensions. Ensure the selected component meets the required steady-state current and peak inrush specifications for the target application environment.
Selection Notes
Select this component based on the required nominal resistance value and maximum operating current. Consider the thermal management requirements and the physical space constraints for radial lead mounting. Verify that the residual resistance meets the system's minimum voltage drop requirements.
Part Context
This part belongs to Littelfuse's range of inrush current limiters, which are essential for protecting electronic components from damage caused by high initial charging currents. These devices are commonly used in consumer electronics, industrial equipment, and automotive applications where power stability is critical.
Replacement Considerations
Consult official Littelfuse documentation for direct cross-reference part numbers within the same series. Ensure any substitute component matches the 30 Ohm nominal resistance, 2A current rating, and compatible package dimensions for proper PCB integration.
