Equivalent & Substitute Parts for BK/MAX-50

Part Overview

The BK/MAX-50 is a 50A automotive blade fuse rated for 32V 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 with 749 units in current inventory. Identifying equivalent substitute parts ensures design flexibility and supply chain continuity when the primary part number becomes unavailable or when alternative sourcing is required.

Substiute Parts

BK/MAX-50

Eaton - Bussmann Electrical DivisionIn Stock: 764BK/MAX-50 Datasheet

Current PartRFQ

MAX-50

Eaton - Bussmann Electrical DivisionIn Stock: 858MAX-50 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the BK/MAX-50 is determined by strict equivalence across the following critical parameters:

• Current Rating: 50 A (exact match required)
• Voltage Rating - DC: 32 V (exact match required)
• Fuse Type: Automotive (exact match required)
• Response Time: Fast Blow (exact match required)
• Package / Case: Blade, Max (exact match required)
• Breaking Capacity @ Rated Voltage: 1 kA (exact match required)
• Mounting Type: Requires Holder (exact match required)
• Physical Dimensions: 1.150" L x 0.350" W x 0.850" H (exact match required)

Only parts meeting all specified parameters qualify as direct substitutes. The MAX-50 variant identified in the substitute list maintains complete parametric alignment with the primary BK/MAX-50 part number.

Parameter Comparison

Engineering Selection Recommendations

Both the BK/MAX-50 and MAX-50 maintain active product status with full regulatory compliance. The MAX-50 variant carries ROHS3 Compliant certification compared to the RoHS Compliant designation of the primary part, indicating enhanced environmental compliance standards. Both parts are REACH Unaffected and carry identical electrical and mechanical specifications. Selection between these parts should be based on inventory availability and specific compliance requirements of the end application. The MAX-50 offers higher current inventory levels at 838 units compared to 749 units for BK/MAX-50.

Frequently Asked Questions (FAQ)

Q: Can MAX-50 be used as a direct replacement for BK/MAX-50?

A: Yes. Both parts are manufactured by Eaton - Bussmann Electrical Division and share identical electrical ratings (50A, 32V DC), response characteristics (Fast Blow), package type (Blade, Max), and physical dimensions. All critical substitution parameters match exactly.

Q: What determines if a fuse can substitute for the BK/MAX-50?

A: A substitute fuse must match all of the following: 50A current rating, 32V DC voltage rating, automotive fuse type, fast-blow response time, Blade Max package configuration, 1kA breaking capacity, and 1.150" x 0.350" x 0.850" physical dimensions. Deviation in any parameter disqualifies the part as a direct substitute.

Q: Are there compliance differences between BK/MAX-50 and MAX-50?

A: Both parts are RoHS compliant and REACH Unaffected. The MAX-50 carries ROHS3 Compliant certification, representing a higher environmental compliance standard. Both meet automotive fuse requirements for their respective applications.

Q: Does the fuse require a specific holder?

A: Yes. Both BK/MAX-50 and MAX-50 require a compatible Max blade fuse holder for installation. The physical dimensions (1.150" L x 0.350" W x 0.850" H) must align with the holder specifications.

Q: What is the breaking capacity specification?

A: Both parts have a breaking capacity of 1 kA at rated voltage (32V DC). This specification defines the maximum fault current the fuse can safely interrupt without damage or hazard.