NF10AA0809M Inrush Current Limiter - Equivalent & Substitute Parts

Part Overview

The NF10AA0809M is an inrush current limiter manufactured by KYOCERA AVX, rated at 8 Ohms with ±20% tolerance and a maximum steady-state current of 3 A. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The NF10 series has been discontinued, necessitating evaluation of active alternative components that maintain equivalent electrical and mechanical performance characteristics.

Substiute Parts

NF10AA0809M--

KYOCERA AVXIn Stock: 911NF10AA0809M-- Datasheet

Current PartRFQ

B57235S0809M000

EPCOS - TDK ElectronicsIn Stock: 6574B57235S0809M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NF10AA0809M is determined by the following critical parameters:

• Resistance Value: 8 Ohms (primary electrical characteristic)
• Tolerance: ±20% (acceptable variance specification)
• Steady-State Current Rating: Minimum 3 A (functional requirement)
• Moisture Sensitivity Level: 1 (Unlimited) (environmental robustness)
• REACH and ECCN Status: REACH Unaffected, EAR99 (regulatory compliance)

The B57235S0809M000 from EPCOS - TDK Electronics meets these substitution criteria. While physical dimensions differ (9.50mm vs. 11.50mm diameter; 5.00mm vs. 7.62mm lead spacing), the electrical parameters and functional performance remain compatible for inrush current limiting applications. The substitute part offers improved current capacity (4.6 A vs. 3 A) and active product status with RoHS3 compliance.

Parameter Comparison

Engineering Selection Recommendations

The B57235S0809M000 is the designated manufacturer-recommended substitute for the NF10AA0809M. Selection of this alternative is justified by:

• Electrical Equivalence: Identical 8 Ohm resistance and ±20% tolerance specification
• Functional Superiority: Higher steady-state current rating (4.6 A vs. 3 A) provides operational margin
• Active Product Status: Ensures long-term availability and supply chain continuity
• Regulatory Compliance: RoHS3 compliance and multiple approval certifications (CQC, UL, VDE) support modern design requirements
• Environmental Robustness: Maintains MSL 1 rating for unlimited moisture exposure tolerance

Physical dimension differences (diameter and lead spacing) require PCB layout verification to confirm mechanical compatibility within the target application.

Frequently Asked Questions (FAQ)

Q: Can the B57235S0809M000 directly replace the NF10AA0809M without circuit modification?

A: Electrical substitution is valid. The 8 Ohm resistance, ±20% tolerance, and MSL 1 rating are identical. However, physical dimensions differ; PCB footprint and mechanical clearance must be verified before implementation.

Q: What is the significance of the higher 4.6 A rating on the substitute part?

A: The B57235S0809M000 provides 0.5 A additional steady-state current capacity compared to the original 3 A specification. This represents improved thermal performance and operational margin without affecting the core 8 Ohm inrush current limiting function.

Q: Does the RoHS3 compliance of the substitute affect compatibility?

A: RoHS3 compliance is a regulatory advantage and does not impact electrical or functional compatibility. It reflects modern manufacturing standards and supports compliance requirements for new designs.

Q: Are there mechanical considerations for PCB integration?

A: Yes. The substitute part has a smaller diameter (9.50mm vs. 11.50mm) and reduced lead spacing (5.00mm vs. 7.62mm). Verify that the PCB footprint accommodates these dimensions before component placement.

Q: What certifications does the substitute part carry?

A: The B57235S0809M000 holds CQC, UL, and VDE approvals, providing broader regulatory recognition compared to the original part.