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Product Detailed Parameters
- Description：ICL 4.7 OHM 20% 3A 8.5MM
- Series：S153
- Mfr：EPCOS - TDK Electronics
- Package：Cut Tape (CT),Tape & Box (TB)
- R @ 25°C：4.7 Ohms
- Tolerance：±20%
- Current - Steady State Max：3:00 AM
- R @ Current：-
- Diameter：0.335" (8.50mm)
- Lead Spacing：0.197" (5.00mm)
- Grade：-
- Qualification：-
- Approval Agency：UL
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Overview
The B57153S479M54 is an NTC thermistor inrush current limiter from the S153 series, manufactured by TDK. It features a nominal resistance of 4.7 Ohms at 25°C with a tolerance of ±20%. The component supports a maximum steady-state current of 3 A and is rated for 115 VAC or 230 VAC. It has a B-parameter of 2800 K and a power rating of 1.4 W. The physical dimensions include an 8.5 mm diameter and 6 mm width, with a lead spacing of 5 mm. It operates within a temperature range of -55°C to +170°C.
Feature Summary
- Provides high electrical stability for circuit protection applications
- Reduces power consumption significantly as resistance drops during operation
- Features radial leads for standard PCB mounting
Applications
- Power supply input stages
- Transformer primary circuits
- Capacitor charging protection
Procurement Notes
Verify the specific ordering suffix M54 corresponds to the tape and reel packaging format required for automated assembly processes. Confirm that the voltage ratings align with the target application's AC line specifications before finalizing procurement orders.
Selection Notes
Select this component when a 4.7 Ohm initial resistance is required to limit peak inrush currents up to 3 Amperes. Ensure the thermal environment stays within the specified operating range and that the 8.5 mm form factor fits the available PCB footprint constraints.
Part Context
This part belongs to the B57153S series of negative temperature coefficient thermistors designed specifically for limiting surge currents. The S153 designation indicates the specific size class and performance characteristics tailored for robust electronic circuit protection duties.
Replacement Considerations
Equivalent parts include B57153S0479M000 and B57153S479M. Verify package compatibility and lead spacing when substituting bulk packaged variants for tape-reel versions.
FAQ
What is the B-parameter value for this thermistor?
The B-parameter is 2800 K.
Does this component support UL certification?
Yes, the component holds UL certification.
