BK1/GMC-7-R Equivalent & Substitute Parts

Part Overview

The BK1/GMC-7-R is a 7 A 125 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This medium-blow fuse operates in a 5mm x 20mm form factor and requires a dedicated fuse holder for installation. The part is currently active in production with 1087 pieces in stock. Glass cartridge fuses of this specification are essential protective components in electrical circuits where overcurrent protection and circuit isolation are required. Identifying equivalent substitute parts ensures design flexibility, supply chain continuity, and component availability across manufacturing and maintenance operations.

Substiute Parts

BK1/GMC-7-R

Eaton - Electronics DivisionIn Stock: 1187BK1/GMC-7-R Datasheet

Current PartRFQ

BK/GMC-7-R

Eaton - Electronics DivisionIn Stock: 1982BK/GMC-7-R Datasheet

Parametric EquivalentRFQ

0233007.MXP

Littelfuse Inc.In Stock: 18790233007.MXP Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the BK1/GMC-7-R are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Primary Matching Criteria:

• Current Rating: 7 A (exact match required)
• Voltage Rating (AC): 125 V (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Compatibility Factors:

• Breaking Capacity @ Rated Voltage: 200 A minimum
• Melting I²t: 150 minimum
• DC Cold Resistance: within acceptable tolerance range
• RoHS Compliance: ROHS3 Compliant
• Product Status: Active

All identified substitutes meet these criteria and are therefore electrically and mechanically interchangeable with the main part in applications requiring 7 A 125 V AC/DC protection in a 5mm x 20mm glass cartridge format.

Parameter Comparison

Engineering Selection Recommendations

BK/GMC-7-R (Eaton - Electronics Division): This substitute is a direct parametric equivalent to the BK1/GMC-7-R, manufactured by the same supplier. Both parts share identical electrical specifications, breaking capacity, melting I²t, and DC cold resistance. The BK/GMC-7-R carries UL approval in addition to MITI certification and maintains ROHS3 compliance. With 1951 pieces in inventory, this part offers superior stock availability. Selection of this substitute is appropriate for applications where Eaton GMC series continuity is preferred and UL certification is required.

0233007.MXP (Littelfuse Inc.): This substitute meets all primary electrical and mechanical matching criteria as a 7 A 125 V AC/DC medium-blow glass cartridge fuse in 5mm x 20mm format. The Littelfuse 233 series part demonstrates enhanced breaking capacity at 10 kA compared to the 200 A specification of the main part, and melting I²t of 157.31 exceeds the 150 minimum. DC cold resistance is 0.0137 Ohms, within acceptable tolerance. This part carries CE, PSE, and UL certifications, providing broader international compliance coverage. Operating temperature range of -55°C to 125°C is specified. Selection of this substitute is appropriate for applications requiring multi-standard certification and enhanced breaking capacity performance.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-7-R be used as a direct replacement for BK1/GMC-7-R? A: Yes. Both parts are manufactured by Eaton - Electronics Division and share identical electrical specifications, current rating (7 A), voltage rating (125 V AC), fuse type (cartridge, glass), package format (5mm x 20mm), response time (medium blow), breaking capacity (200 A), melting I²t (150), and DC cold resistance (0.012 Ohms). They are mechanically and electrically interchangeable.

Q: What are the key differences between the Eaton BK1/GMC-7-R and the Littelfuse 0233007.MXP? A: Both parts meet identical primary electrical and mechanical requirements. The Littelfuse 0233007.MXP offers higher breaking capacity (10 kA versus 200 A), slightly higher melting I²t (157.31 versus 150), and broader certification coverage (CE, PSE, UL versus MITI, UR). The Littelfuse part also specifies an operating temperature range of -55°C to 125°C. DC cold resistance differs slightly (0.0137 Ohms versus 0.012 Ohms).

Q: Are all three parts compatible with the same fuse holder? A: Yes. All three parts share identical physical dimensions (0.205" Dia x 0.787" L / 5.20mm x 20.00mm) and mounting type (requires holder). They are mechanically compatible with any standard 5mm x 20mm fuse holder.

Q: Which substitute should be selected for maximum circuit protection? A: The Littelfuse 0233007.MXP provides enhanced breaking capacity at 10 kA, compared to 200 A for the Eaton parts. Selection depends on circuit requirements and fault current levels. Both Eaton substitutes are identical in protection characteristics.

Q: Are all parts RoHS compliant? A: Yes. BK1/GMC-7-R, BK/GMC-7-R, and 0233007.MXP are all ROHS3 compliant.

Q: What certifications apply to each part? A: BK1/GMC-7-R carries MITI and UR approvals. BK/GMC-7-R carries MITI and UL approvals. 0233007.MXP carries CE, PSE, and UL approvals. Selection should be based on regional certification requirements.

Q: Can these parts be used in DC applications? A: All three parts are rated for 125 V AC/DC operation. DC cold resistance values are provided (0.012 Ohms for Eaton parts, 0.0137 Ohms for Littelfuse), indicating DC compatibility within the specified voltage rating.