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ST30003B

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ST30003B

ST30003B

  • Description：ICL 30 OHM 20% 3A 17.78MM
  • Series：ST
  • Mfr：Littelfuse Inc.
  • Package：Bulk

SKU:9b25ab607d1c Category: Brand:

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Product Detailed Parameters

  • Description：ICL 30 OHM 20% 3A 17.78MM
  • Series：ST
  • Mfr：Littelfuse Inc.
  • Package：Bulk
  • R @ 25°C：30 Ohms
  • Tolerance：±20%
  • Current - Steady State Max：3:00 AM
  • R @ Current：460 mOhms
  • Diameter：0.700" (17.78mm)
  • Lead Spacing：0.300" (7.62mm)
  • Grade：-
  • Qualification：-
  • Approval Agency：-

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ST30003B

How to buy
Online and offline orders are supported. If the item is available for online purchase, you can place it in the cart; for wholesale pricing, please contact our product manager for a quote.
Payment Method
Payment methods: T/T, WeChat Pay, credit cards, Google Pay, Apple Pay . Buyer covers shipping, fees, duties, and taxes; contact our product manager if you need a contract/procurement process.
Delivery time
In-stock items usually ship within 24 hours. Otherwise, shipment is arranged 1 to 2 days after the items arrive at our warehouse. Timing depends on destination and shipping method.
Freight calculation
Freight cost depends on destination, package size, and weight . We offer shipping options via DHL, FedEx, UPS, and TNT , and can ship using your freight account upon request.
Mode of Transportation
We ship via DHL, FedEx, UPS, and TNT. If you prefer a specific logistics provider, we can ship using your designated carrier.
Return and Refund
Returns are accepted within 60 days of invoice with RMA approval. Items must be resalable; original invoice and test report are required. No returns for customer errors.

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Buying Guide
Summary

Littelfuse Inc. ST30003B is used in Inrush Current Limiters (ICL) category where integration and verification need to stay predictable. Key specs include Description (ICL 30 OHM 20% 3A 17.78MM), Series (ST), and Packaging (Bulk).

Selection Notes
  • For ST30003B, validate R @ Current (460 mOhms) under the expected test conditions in your application.
  • Confirm the tolerance (±20%) is acceptable for your accuracy and drift budget.
  • Make sure Current - Steady State Max (3:00 AM) aligns with your design targets and verification plan.
Alternates & Substitutions
  • For Inrush Current Limiters (ICL), validate alternates under worst-case corners rather than assuming typical-only conditions represent production builds.
  • Confirm absolute maximum ratings and recommended operating conditions match your system constraints before approval.
  • When evaluating alternates, treat packaging Bulk as non-negotiable unless you are re-spinning the PCB.
  • When in doubt, treat the swap as an ECO: define acceptance criteria, then validate under worst-case operating corners.
FAQ

How do I confirm compatibility for ST30003B?
Match mechanical footprint first, then verify electrical limits and operating conditions against your system constraints.

Can you confirm the Diameter for ST30003B?
0.700" (17.78mm)

Can you confirm the R @ 25°C for ST30003B?
30 Ohms

Which packaging format is listed for ST30003B?
Bulk

Application Scenarios

Littelfuse Inc. ST30003B shows up under Inrush Current Limiters (ICL) when designers want a well-bounded, datasheet-driven building block instead of a fragile board-level workaround. They limit damage during overloads, surges, and ESD so faults do not cascade into expensive downstream failures. They reduce downtime by constraining fault energy during surges, shorts, and miswiring events. Within industrial I/O, coordinated surge protection defends long wiring against lightning-induced spikes and switching noise. In power distribution, limiting peak current improves reliability of upstream supplies and wiring harnesses during brownouts and restart events. Within field service, predictable inrush behavior simplifies troubleshooting by making startup current profiles repeatable across units. For fielded equipment, repeatability and documentation often matter as much as peak performance, and this approach supports both.

Compatibility Advice
  • For production stability, validate surge waveforms and repetition against the real wiring environment so degradation does not become a silent field failure mode. This helps field behavior stay predictable across lots.
Project Fit
  • Best fit for Inrush Current Limiters (ICL) when you can validate the key assumptions on the assembled system and keep acceptance criteria measurable.
ST30003BST30003B

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