BK/MAX-40 Equivalent & Substitute Parts

Part Overview

The BK/MAX-40 is a 40 A automotive blade fuse rated for 32 V DC operation with fast-blow response characteristics. Manufactured by Eaton - Bussmann Electrical Division, this component is designed for automotive electrical systems requiring reliable overcurrent protection. The part maintains Active product status and is RoHS Compliant, making it suitable for current production applications. Substitute parts are identified based on matching electrical ratings, mechanical form factor, and performance characteristics to ensure direct functional equivalence in automotive fuse holder applications.

Substiute Parts

BK/MAX-40

Eaton - Bussmann Electrical DivisionIn Stock: 1116BK/MAX-40 Datasheet

Current PartRFQ

MAX-40

Eaton - Bussmann Electrical DivisionIn Stock: 1133MAX-40 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK/MAX-40 are identified through parametric equivalence matching. The substitution logic is based on the following critical parameters that must remain constant:

• Current Rating: 40 A
• Voltage Rating - DC: 32 V
• Fuse Type: Automotive
• Response Time: Fast Blow
• Package / Case: Blade, Max
• Breaking Capacity @ Rated Voltage: 1 kA
• Mounting Type: Requires Holder
• Physical Dimensions: 1.150" L x 0.350" W x 0.850" H

Parts meeting all these parameters are classified as direct parametric equivalents and may be substituted without modification to the circuit or holder assembly.

Parameter Comparison

Engineering Selection Recommendations

Both the BK/MAX-40 and MAX-40 are Active product status components manufactured by Eaton - Bussmann Electrical Division. The MAX-40 carries ROHS3 Compliant certification, representing an updated compliance standard relative to the base RoHS Compliant designation of the BK/MAX-40. Both parts share identical electrical ratings, mechanical form factors, and breaking capacity specifications. Selection between these parts should be based on compliance requirements specific to the end application and regional regulatory frameworks. The MAX-40 is suitable for applications requiring enhanced environmental compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can MAX-40 be used as a direct replacement for BK/MAX-40?

A: Yes. Both parts are parametrically equivalent with matching current ratings (40 A), voltage ratings (32 V DC), response time (Fast Blow), package type (Blade, Max), and physical dimensions. The MAX-40 carries updated ROHS3 compliance certification.

Q: What determines compatibility between these fuse parts?

A: Compatibility is determined by matching current rating, voltage rating, fuse type, response time, package form factor, breaking capacity, and physical dimensions. All these parameters are identical between BK/MAX-40 and MAX-40.

Q: Are there any mechanical differences between BK/MAX-40 and MAX-40?

A: No. Both parts have identical dimensions of 1.150" L x 0.350" W x 0.850" H and require the same MAX-series fuse holder assembly.

Q: What is the significance of the ROHS3 compliance on MAX-40?

A: ROHS3 Compliant status indicates compliance with the updated Restriction of Hazardous Substances directive. This certification is relevant for applications subject to current environmental regulations in specific markets and jurisdictions.

Q: Can these fuses be used interchangeably in automotive electrical systems?

A: Yes, within systems designed for 40 A, 32 V DC automotive fuse applications using MAX-series blade holders. Both parts provide identical electrical protection characteristics and mechanical fit.