BK1/GMC-630-R Equivalent & Substitute Parts Reference

Part Overview

The BK1/GMC-630-R is a 630 mA glass cartridge fuse rated for 250 V AC, manufactured by Eaton - Electronics Division. This medium-blow fuse is designed for 5mm x 20mm holder applications and requires an external fuse holder for installation. The part maintains Active product status with 689 pieces currently in stock. Equivalent and substitute parts are identified when organizations require alternative sourcing options due to supply constraints, inventory management, or regional availability considerations.

Substiute Parts

BK1/GMC-630-R

Eaton - Electronics DivisionIn Stock: 716BK1/GMC-630-R Datasheet

Current PartRFQ

BK/GMC-630-R

Eaton - Electronics DivisionIn Stock: 1348BK/GMC-630-R Datasheet

Parametric EquivalentRFQ

0034.2514

SCHURTER Inc.In Stock: 16530034.2514 Datasheet

Parametric EquivalentRFQ

MSC-630MA

OptiFuseIn Stock: 3251MSC-630MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/GMC-630-R are qualified based on the following critical parameters that must align with the main part:

Mandatory Matching Parameters:

• Current Rating: 630 mA (exact match required)
• Voltage Rating - AC: 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Allowable Variation Parameters:

• Breaking Capacity @ Rated Voltage: May exceed the main part specification
• Melting I²t: Minor variations acceptable within fuse characteristic tolerance
• Voltage Rating - DC: May be specified in substitutes when not specified in main part
• Operating Temperature Range: May be broader than main part
• Approval Agencies: May include additional certifications beyond main part

All three substitute parts meet the mandatory matching criteria and are therefore electrically and mechanically compatible with applications designed for the BK1/GMC-630-R.

Parameter Comparison

Engineering Selection Recommendations

BK/GMC-630-R (Eaton - Electronics Division)

This part is a direct parametric equivalent to the BK1/GMC-630-R, differing only in packaging designation. Both are manufactured by Eaton and share identical electrical specifications, breaking capacity, and melting I²t characteristics. The BK/GMC-630-R carries CSA, KC-MARK, and UL certifications. This substitute is suitable for applications where Eaton sourcing is preferred or required. Higher inventory availability (1258 pieces) supports supply chain continuity.

0034.2514 (SCHURTER Inc.)

This SCHURTER FSM 5x20 series fuse meets all mandatory electrical and mechanical parameters. The part specifies a 125 V DC rating in addition to the 250 V AC rating, providing broader voltage coverage for dual-voltage applications. Breaking capacity is elevated to 80A, and melting I²t is 0.905. Operating temperature range is specified as -40°C to 85°C. No approval agency certifications are listed for this part. Selection is appropriate for applications requiring DC voltage capability or extended temperature operation within the specified range.

MSC-630MA (OptiFuse)

This OptiFuse MSC series fuse satisfies all mandatory electrical and mechanical requirements. The part features the highest breaking capacity at 100A and an extended operating temperature range of -55°C to 125°C. Certifications include cULus and UL 248. Melting I²t is 0.688, closely aligned with the main part. Highest inventory availability (3187 pieces) supports rapid procurement. Selection is appropriate for applications requiring enhanced breaking capacity, extended temperature performance, or when OptiFuse sourcing is specified.

Frequently Asked Questions (FAQ)

Q: Can the BK/GMC-630-R be used as a direct replacement for the BK1/GMC-630-R?

A: Yes. Both parts are manufactured by Eaton and share identical electrical specifications, current rating (630 mA), voltage rating (250 V AC), fuse type (cartridge glass), package dimensions (5mm x 20mm), response time (medium blow), and breaking capacity (35A). The parts differ only in packaging designation.

Q: What is the significance of the higher breaking capacity in the SCHURTER 0034.2514 and OptiFuse MSC-630MA?

A: Breaking capacity indicates the maximum fault current the fuse can safely interrupt without rupturing the fuse body. The SCHURTER part (80A) and OptiFuse part (100A) both exceed the main part specification (35A). Higher breaking capacity provides additional safety margin in circuits with higher available fault currents. Selection depends on the actual fault current available in the application circuit.

Q: Are there voltage differences between the substitute parts?

A: The SCHURTER 0034.2514 specifies both 250 V AC and 125 V DC ratings, making it suitable for dual-voltage applications. The BK1/GMC-630-R, BK/GMC-630-R, and MSC-630MA specify 250 V AC without explicit DC ratings. For applications requiring DC voltage protection, the SCHURTER part provides documented DC capability.

Q: Do all substitute parts require the same holder?

A: Yes. All parts share identical package dimensions (5mm x 20mm) and mounting type (requires holder). Any 5mm x 20mm fuse holder compatible with the BK1/GMC-630-R will accommodate all substitute parts listed.

Q: What are the approval agency differences?

A: The BK1/GMC-630-R carries CSA, KC, and UL certifications. The BK/GMC-630-R adds KC-MARK certification. The MSC-630MA carries cULus and UL 248 certifications. The SCHURTER 0034.2514 lists no approval agencies. Selection should align with regional compliance requirements and application standards.

Q: Which substitute part has the best inventory availability?

A: The OptiFuse MSC-630MA has the highest inventory at 3187 pieces, followed by the SCHURTER 0034.2514 at 1563 pieces and the Eaton BK/GMC-630-R at 1258 pieces. The original BK1/GMC-630-R has 689 pieces in stock.

Q: Can the Melting I²t differences affect circuit protection?

A: Melting I²t characterizes the fuse's thermal response. The main part and substitutes show minor variations: BK1/GMC-630-R (0.66), BK/GMC-630-R (0.66), SCHURTER 0034.2514 (0.905), and MSC-630MA (0.688). These variations fall within acceptable tolerance for fuses with identical current and voltage ratings. Circuit protection coordination remains valid across all parts.

Q: What operating temperature range should I consider?

A: The BK1/GMC-630-R does not specify an operating temperature range. The SCHURTER 0034.2514 specifies -40°C to 85°C, and the MSC-630MA specifies -55°C to 125°C. For applications operating outside standard ambient conditions, the OptiFuse MSC-630MA provides the broadest temperature coverage.