FWH-.500A6F Equivalent & Substitute Parts

Part Overview

The FWH-.500A6F is a 500mA cartridge fuse rated for 500 VAC operation, manufactured by Eaton - Bussmann Electrical Division. This fuse is designed for electrical and industrial applications requiring overcurrent protection in AC circuits. The part is currently active in production with 1065 units in stock. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the allowed parameter ranges for this fuse category.

Substiute Parts

FWH-.500A6F

Eaton - Bussmann Electrical DivisionIn Stock: 1095FWH-.500A6F Datasheet

Current PartRFQ

AHC-500-R

Eaton - Electronics DivisionIn Stock: 1093AHC-500-R Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

The AHC-500-R qualifies as a substitute for the FWH-.500A6F based on the following critical parameters:

• Current Rating: Both parts are rated at 500mA, ensuring identical overcurrent protection threshold
• Fuse Type: Both are cartridge fuses with identical mechanical form factor
• Package / Case: Both use 3AB, 3AG standard packages with 1/4" x 1-1/4" dimensions
• Mounting Type: Both require a holder for installation
• Voltage Rating: The AHC-500-R is rated for 600 VAC, which exceeds the FWH-.500A6F requirement of 500 VAC, providing compatibility in 500 VAC circuits

The AHC-500-R additionally provides 600 VDC capability and operates across -55°C to 125°C, extending the operational envelope beyond the original part specifications.

Parameter Comparison

Engineering Selection Recommendations

Both the FWH-.500A6F and AHC-500-R are active production parts with current regulatory compliance. The FWH-.500A6F maintains CE, CSA, and UR certifications with a 50kA breaking capacity at rated voltage. The AHC-500-R holds cURus certification with a 10kA breaking capacity and extends operational capability to 600 VAC and 600 VDC with a defined temperature range of -55°C to 125°C.

Selection between these parts depends on circuit requirements. The FWH-.500A6F is appropriate for 500 VAC AC-only applications where the higher 50kA breaking capacity is required. The AHC-500-R is suitable for applications requiring dual AC/DC voltage capability or extended temperature operation, provided the 10kA breaking capacity meets the circuit protection requirements.

Both parts are RoHS compliant and mechanically compatible within standard 3AB/3AG cartridge fuse holders.

Frequently Asked Questions (FAQ)

Q: Can the AHC-500-R replace the FWH-.500A6F in a 500 VAC circuit?

A: Yes. The AHC-500-R is rated for 600 VAC, which exceeds the 500 VAC requirement. Both parts share identical current ratings (500mA) and mechanical form factors (3AB, 3AG, 1/4" x 1-1/4").

Q: What is the difference in breaking capacity between these parts?

A: The FWH-.500A6F has a 50kA breaking capacity at rated voltage, while the AHC-500-R has a 10kA breaking capacity. Breaking capacity determines the maximum fault current the fuse can safely interrupt. Circuit requirements must be evaluated to confirm the 10kA rating is sufficient.

Q: Are the physical dimensions identical?

A: The dimensions are nearly identical with minimal tolerance variation. FWH-.500A6F is 0.252" Dia x 1.252" L (6.40mm x 31.80mm), and AHC-500-R is 0.250" Dia x 1.250" L (6.35mm x 31.75mm). Both fit standard 3AB/3AG cartridge fuse holders.

Q: Does the AHC-500-R provide DC protection?

A: Yes. The AHC-500-R is rated for 600 VDC in addition to 600 VAC, making it suitable for mixed AC/DC applications. The FWH-.500A6F is specified for AC operation only.

Q: What certifications apply to each part?

A: The FWH-.500A6F holds CE, CSA, and UR certifications. The AHC-500-R holds cURus certification. Both are RoHS compliant.

Q: What is the response time difference?

A: The AHC-500-R is specified as Fast Blow. The FWH-.500A6F response time is not specified in the available data.