NF10AA0509M-- Equivalent & Substitute Parts

Part Overview

The NF10AA0509M-- is an Inrush Current Limiter manufactured by KYOCERA AVX, rated at 5 Ohms ±20% with a maximum steady-state current of 3.8 A and a diameter of 0.453" (11.50mm). This component is classified as obsolete, indicating discontinuation from the manufacturer. Locating equivalent substitute parts is necessary to maintain design continuity and ensure component availability for new production runs or field replacements.

Substiute Parts

NF10AA0509M--

KYOCERA AVXIn Stock: 940NF10AA0509M-- Datasheet

Current PartRFQ

B57237S0509M000

EPCOS - TDK ElectronicsIn Stock: 5390B57237S0509M000 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NF10AA0509M-- is determined by the following critical parameters:

• Resistance Value: 5 Ohms ±20% tolerance
• Steady-State Current Rating: Minimum 3.8 A
• Physical Dimensions: Diameter and lead spacing compatibility with PCB layout
• Electrical Performance: Resistance at operating current (190 mOhms)
• Environmental Compliance: RoHS and REACH status for regulatory requirements

The substitute part B57237S0509M000 meets these criteria with equivalent electrical specifications and improved current handling capacity, making it a direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The B57237S0509M000 serves as the primary substitute for the NF10AA0509M--. Selection is based on the following factors:

• Electrical Equivalence: Both components maintain 5 Ohms ±20% resistance with identical tolerance specifications.
• Current Capacity: The substitute provides 5 A steady-state current, exceeding the original 3.8 A requirement, ensuring adequate performance margin.
• Product Status: The substitute is active and in production, providing long-term availability and supply chain stability.
• Regulatory Compliance: The substitute achieves ROHS3 compliance, addressing modern environmental and regulatory requirements.
• Physical Compatibility: Lead spacing is equivalent (0.300" vs. 0.295"), with diameter increase from 11.50mm to 15.00mm requiring PCB layout verification.

Frequently Asked Questions (FAQ)

Q: Can B57237S0509M000 directly replace NF10AA0509M-- without circuit modification?

A: Electrical substitution is direct. The 5 Ohm resistance and ±20% tolerance are identical. However, the increased diameter (15.00mm vs. 11.50mm) requires verification of available PCB space. Lead spacing is compatible (0.295" vs. 0.300").

Q: What is the impact of the higher current rating (5 A vs. 3.8 A)?

A: The higher rating provides additional thermal and electrical margin. This does not negatively affect circuit operation when the original design requires 3.8 A maximum.

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

A: RoHS3 compliance is a regulatory advantage with no negative impact on electrical or mechanical compatibility. It ensures compliance with current environmental standards.

Q: Are there physical space constraints with the larger diameter?

A: The substitute diameter increases from 11.50mm to 15.00mm. PCB layout must be reviewed to confirm adequate clearance in the component mounting area.

Q: What is the moisture sensitivity level for both components?

A: Both components are rated MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.