NF08AA0100M-- Equivalent & Substitute Parts

Part Overview

The NF08AA0100M-- is an inrush current limiter manufactured by KYOCERA AVX, rated at 10 Ohms ±20% with a maximum steady-state current of 2.5 A and a 0.315" (8.00mm) diameter form factor. This component is classified as obsolete, indicating that direct procurement may become unavailable. Identifying qualified substitute parts ensures design continuity and supply chain reliability for applications requiring inrush current limiting functionality with equivalent electrical and mechanical specifications.

Substiute Parts

NF08AA0100M--

KYOCERA AVXIn Stock: 1199NF08AA0100M-- Datasheet

Current PartRFQ

B57235S0100M000

EPCOS - TDK ElectronicsIn Stock: 13837B57235S0100M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NF08AA0100M-- is determined by the following critical parameters:

• Resistance Value: 10 Ohms ±20% tolerance
• Current Rating: Steady-state maximum current of 2.5 A or higher
• Physical Form Factor: Cylindrical inrush current limiter with compatible diameter and lead spacing for PCB mounting
• Electrical Characteristics: Resistance stability and thermal performance under rated current conditions
• Compliance & Availability: Active product status with current manufacturing support

The B57235S0100M000 meets these substitution criteria through equivalent resistance and tolerance specifications, with an increased current rating of 3 A, providing enhanced thermal margin. Physical dimensions differ slightly (0.374" diameter vs. 0.315"), requiring mechanical fit verification in the target application.

Parameter Comparison

Engineering Selection Recommendations

The B57235S0100M000 is the manufacturer-recommended substitute for the obsolete NF08AA0100M--. Selection of this substitute is supported by:

• Electrical Equivalence: Identical resistance value and tolerance specification ensure functional compatibility in inrush current limiting circuits
• Current Margin: The 3 A steady-state rating exceeds the original 2.5 A specification, providing operational headroom
• Active Product Status: The B57235S0100M000 is actively manufactured and supported, ensuring long-term supply availability
• Compliance Enhancement: ROHS3 compliance and multi-agency certifications (CQC, UL, VDE) provide regulatory advantages over the non-compliant original part
• Physical Considerations: Dimensional differences in diameter (0.374" vs. 0.315") and lead spacing (0.197" vs. 0.300") require mechanical fit verification in the target PCB layout

Frequently Asked Questions (FAQ)

Q: Can the B57235S0100M000 be used as a direct drop-in replacement for the NF08AA0100M--?

A: Electrical substitution is valid based on matching resistance and tolerance specifications. However, physical dimensions differ, requiring verification that the larger diameter (0.374" vs. 0.315") and different lead spacing (0.197" vs. 0.300") accommodate the target PCB footprint and mounting requirements.

Q: Why does the substitute part have a higher current rating (3 A vs. 2.5 A)?

A: The B57235S0100M000 is designed with enhanced thermal performance, allowing a higher steady-state current rating. This provides additional operational margin and does not compromise compatibility with circuits designed for the original 2.5 A specification.

Q: What is the impact of the RoHS compliance difference?

A: The original NF08AA0100M-- is RoHS non-compliant, while the B57235S0100M000 is ROHS3 compliant. For applications subject to RoHS regulations or customer requirements, the substitute part provides regulatory alignment. For legacy systems without RoHS mandates, both parts are functionally equivalent.

Q: Are there any certifications or approvals associated with the substitute part?

A: The B57235S0100M000 carries certifications from CQC, UL, and VDE, providing third-party validation of electrical and safety performance. The original part does not specify approval agencies.

Q: How do the lead spacing differences affect PCB design?

A: The original part has 0.300" (7.62mm) lead spacing, while the substitute has 0.197" (5.00mm) spacing. PCB footprints must be verified or redesigned to accommodate the substitute's lead configuration. This is a mechanical consideration independent of electrical function.