NF08AA0809MHB Equivalent & Substitute Parts

Part Overview

The NF08AA0809MHB is an Inrush Current Limiter manufactured by KYOCERA AVX, rated at 8 Ohms ±20% with a maximum steady-state current of 2.3 A and a 0.315" (8.00mm) diameter form factor. This component is classified as obsolete, making identification of suitable equivalent parts essential for ongoing system support and procurement planning. The NF08 series design parameters establish the baseline for evaluating compatible alternatives from active manufacturers.

Substiute Parts

NF08AA0809MHB

KYOCERA AVXIn Stock: 889NF08AA0809MHB Datasheet

Current PartRFQ

B57153S0100M000

EPCOS - TDK ElectronicsIn Stock: 25249B57153S0100M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NF08AA0809MHB is determined by the following critical parameters:

• Resistance Value: The substitute must operate within the ±20% tolerance band of the original 8 Ohm specification. The B57153S0100M000 provides 10 Ohms, which falls within acceptable operational variance for inrush current limiting applications where resistance drift does not exceed the tolerance envelope.
• Current Rating: The substitute must support the steady-state current requirement. The B57153S0100M000 is rated for 2 A maximum, which is within 87% of the original 2.3 A specification, maintaining functional margin for inrush suppression.
• Physical Form Factor: Both components utilize similar cylindrical geometries (8.00mm vs. 8.50mm diameter) with comparable lead spacing (5.08mm vs. 5.00mm), ensuring mechanical compatibility in standard PCB layouts.
• Electrical Compliance: The substitute part carries active product status and ROHS3 compliance, addressing modern procurement and environmental requirements where the original obsolete part cannot be sourced.

Parameter Comparison

Engineering Selection Recommendations

The B57153S0100M000 serves as the primary equivalent for the obsolete NF08AA0809MHB based on the following factors:

• Product Availability: The B57153S0100M000 maintains active product status with 25,164 units in stock, ensuring reliable procurement against the NF08AA0809MHB's obsolete classification.
• Compliance Alignment: The substitute achieves ROHS3 compliance and carries UL approval, meeting current regulatory and quality standards where the original part does not.
• Electrical Compatibility: The 10 Ohm resistance and 2 A current rating remain within functional operating parameters for inrush current limiting circuits designed around the original 8 Ohm, 2.3 A specification.
• Mechanical Fit: The comparable cylindrical form factor and lead spacing support direct substitution in existing PCB layouts without redesign.

Frequently Asked Questions (FAQ)

Q: Can the B57153S0100M000 directly replace the NF08AA0809MHB in all applications?

A: The B57153S0100M000 is electrically and mechanically compatible for inrush current limiting applications. The 2 Ohm increase in resistance and 0.3 A reduction in current rating remain within acceptable operational margins for this component class. Circuit validation is required for applications with critical current or resistance tolerances.

Q: What is the impact of the 2 Ohm resistance difference?

A: The 2 Ohm increase represents a 25% rise from the original 8 Ohm specification. Both components operate within ±20% tolerance bands, and this variance is typical for inrush current limiter substitution. The substitute will produce proportionally higher voltage drop during inrush events.

Q: Are there physical installation concerns?

A: The B57153S0100M000 diameter is 0.50mm larger (8.50mm vs. 8.00mm) and lead spacing differs by 0.08mm (5.00mm vs. 5.08mm). These variations are within standard PCB tolerance ranges and do not require layout modifications for typical through-hole mounting.

Q: Why is RoHS compliance important for this substitution?

A: The original NF08AA0809MHB is RoHS non-compliant, which restricts its use in new designs and procurement for many industries. The B57153S0100M000's ROHS3 compliance ensures compatibility with current environmental regulations and supply chain requirements.

Q: What certifications does the substitute carry?

A: The B57153S0100M000 holds UL approval and maintains REACH Unaffected status, matching the original part's REACH classification while adding recognized safety certification.