NF13AA0809M Inrush Current Limiter - Equivalent & Substitute Parts

Part Overview

The NF13AA0809M is an inrush current limiter manufactured by KYOCERA AVX, rated at 8 Ohms ±20% with a maximum steady-state current of 3.6 A and a physical diameter of 0.512" (13.00mm). This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The NF13 series is no longer in active production, necessitating evaluation of alternative components that maintain equivalent electrical and mechanical performance characteristics.

Substiute Parts

NF13AA0809M--

KYOCERA AVXIn Stock: 1180NF13AA0809M-- Datasheet

Current PartRFQ

B57236S0809L002

EPCOS - TDK ElectronicsIn Stock: 878B57236S0809L002 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the NF13AA0809M is determined by the following critical parameters:

• Resistance value: 8 Ohms (primary electrical specification)
• Tolerance: ±20% maximum allowable deviation
• Steady-state current rating: minimum 3.6 A
• Physical form factor: cylindrical inrush current limiter
• Lead spacing and diameter: mechanical compatibility with existing PCB layouts

The B57236S0809L002 from EPCOS - TDK Electronics meets these substitution criteria. It maintains the 8 Ohm resistance specification with improved tolerance (±15%), exceeds the current rating requirement (3.7 A), and provides active product status with modern compliance certifications. Physical dimensions differ slightly (0.453" diameter, 0.197" lead spacing), requiring PCB layout verification for mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

The B57236S0809L002 is the qualified substitute for the NF13AA0809M based on the following factors:

• Electrical equivalence: Both components maintain 8 Ohm resistance with the substitute offering tighter tolerance (±15% vs ±20%)
• Current capacity: The substitute exceeds the original specification (3.7 A vs 3.6 A)
• Product lifecycle: The substitute is in active production status, ensuring long-term availability and supply chain stability
• Regulatory compliance: The substitute meets ROHS3 and UL certification requirements, addressing modern environmental and safety standards
• Physical compatibility: PCB layout modification is required due to differences in diameter (13.00mm vs 11.50mm) and lead spacing (7.62mm vs 5.00mm)

Frequently Asked Questions (FAQ)

Q: Can the B57236S0809L002 be used as a direct drop-in replacement for the NF13AA0809M?

A: Electrical substitution is valid. However, mechanical compatibility requires PCB layout verification. The substitute has a smaller diameter (11.50mm vs 13.00mm) and different lead spacing (5.00mm vs 7.62mm), necessitating potential footprint modifications.

Q: What is the significance of the tolerance difference between ±20% and ±15%?

A: The substitute offers improved tolerance, meaning the actual resistance value will be closer to the nominal 8 Ohm specification. This provides tighter performance control in inrush current limiting applications.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance ensures the substitute meets current environmental regulations for hazardous substance restrictions. The original NF13AA0809M is RoHS non-compliant, making the substitute necessary for applications subject to modern regulatory requirements.

Q: Is the current rating difference (3.6 A vs 3.7 A) significant?

A: The substitute exceeds the original specification by 0.1 A, providing additional thermal margin. This is a favorable characteristic for long-term reliability in steady-state operation.

Q: What should be verified before implementing the B57236S0809L002 in production?

A: Verify PCB footprint compatibility with the new lead spacing and diameter. Confirm that the application environment and thermal conditions are within the substitute component's rated specifications.