Equivalent & Substitute Parts for BK/GMC-200MA Glass Fuse Cartridge

Part Overview

The BK/GMC-200MA is a 200 mA, 250 V AC/DC glass fuse cartridge manufactured by Eaton - Electronics Division in a 5mm x 20mm form factor. This component is classified as obsolete product status. Identification of equivalent and substitute parts is necessary to maintain circuit protection functionality in applications where the original part is no longer available through standard distribution channels. All substitute parts listed maintain the same electrical ratings, mechanical dimensions, and mounting requirements as the primary component.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Response Time	Medium Blow

Substitute Part Grouping Explanation

Substitute parts for the BK/GMC-200MA are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalents (Eaton GMC Series): Parts BK/GMC-200-R, BK1/GMC-200-R, and GMC-200-R are manufactured by Eaton - Electronics Division within the same GMC series. These parts share identical electrical specifications: 200 mA current rating, 250 V AC voltage rating, medium blow response time, 35A breaking capacity, and 5mm x 20mm physical dimensions. The primary distinction is product status, with these parts classified as active versus the obsolete BK/GMC-200MA.

Cross-Manufacturer Parametric Equivalents (Littelfuse Series): Parts 0218.200HXP, 0218.200MXP, 20102000001, 20102000001P, 20102000021, 20102000021P, and 20102000301P are manufactured by Littelfuse Inc. These parts maintain identical current rating (200 mA), voltage rating (250 V AC), package dimensions (5mm x 20mm), and mounting type (requires holder). Substitution is based on these core electrical and mechanical parameters. Differences exist in response time classification, breaking capacity, melting I²t values, and operating temperature ranges, which are documented in the parameter comparison table below.

Parameter Comparison

Part Number	Manufacturer	Current Rating (mA)	Voltage Rating (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	Product Status	RoHS Status
BK/GMC-200MA	Eaton	200	250	Medium Blow	5x20mm	35	0.032	Obsolete	Non-compliant
BK/GMC-200-R	Eaton	200	250	Medium Blow	5x20mm	35	0.032	Active	ROHS3 Compliant
BK1/GMC-200-R	Eaton	200	250	Medium Blow	5x20mm	35	0.032	Active	ROHS3 Compliant
GMC-200-R	Eaton	200	250	Medium Blow	5x20mm	35	0.032	Active	ROHS3 Compliant
0218.200HXP	Littelfuse	200	250	Slow Blow	5x20mm	35	0.341	Active	ROHS3 Compliant
0218.200MXP	Littelfuse	200	250	Slow Blow	5x20mm	35	0.341	Active	ROHS3 Compliant
20102000001	Littelfuse	200	250	Medium Blow	5x20mm	80	0.12	Active	ROHS3 Compliant
20102000001P	Littelfuse	200	250	Medium Blow	5x20mm	80	0.12	Active	ROHS3 Compliant
20102000021	Littelfuse	200	250	Medium Blow	5x20mm	80	0.12	Active	ROHS3 Compliant
20102000021P	Littelfuse	200	250	Medium Blow	5x20mm	80	0.12	Active	ROHS3 Compliant
20102000301P	Littelfuse	200	250	Medium Blow	5x20mm	80	0.12	Active	ROHS3 Compliant

Engineering Selection Recommendations

Primary Recommendation: BK/GMC-200-R, BK1/GMC-200-R, or GMC-200-R (Eaton - Electronics Division)

These three parts are direct equivalents to the BK/GMC-200MA. They maintain identical electrical characteristics including 200 mA current rating, 250 V AC voltage rating, medium blow response time, 35A breaking capacity, and 0.032 melting I²t value. All three are classified as active product status with ROHS3 compliance. Selection among these three Eaton variants depends on packaging preference and inventory availability. Approval agencies include CSA, KC-MARK, and UL certifications.

Secondary Recommendation: 20102000001, 20102000001P, 20102000021, 20102000021P, or 20102000301P (Littelfuse Inc.)

These Littelfuse parts maintain the same current rating (200 mA), voltage rating (250 V AC), response time classification (medium blow), and 5mm x 20mm package dimensions. These parts feature higher breaking capacity (80A versus 35A) and higher melting I²t value (0.12 versus 0.032). All are active product status with ROHS3 compliance and cULus certification. These parts are suitable for applications where the higher breaking capacity and thermal characteristics do not conflict with circuit design requirements.

Alternative Consideration: 0218.200HXP or 0218.200MXP (Littelfuse Inc.)

These Littelfuse parts maintain identical current rating (200 mA), voltage rating (250 V AC), and 5mm x 20mm package dimensions. The primary difference is response time classification: these parts are slow blow versus the medium blow characteristic of the BK/GMC-200MA. Slow blow fuses tolerate temporary inrush currents better than medium blow fuses. Selection of these parts requires confirmation that the application circuit design accommodates slow blow response characteristics. Both parts feature higher breaking capacity (35A) and higher melting I²t value (0.341) compared to the original part.

Frequently Asked Questions (FAQ)

Q: Can BK/GMC-200-R, BK1/GMC-200-R, and GMC-200-R be used interchangeably with BK/GMC-200MA?

A: Yes. These three Eaton parts are parametric equivalents with identical electrical ratings (200 mA, 250 V AC), response time (medium blow), breaking capacity (35A), melting I²t (0.032), and physical dimensions (5mm x 20mm). The primary difference is product status: the original BK/GMC-200MA is obsolete while these three are active. All require the same fuse holder.

Q: What is the difference between medium blow and slow blow response times?

A: Response time classification indicates the fuse element's thermal response to overcurrent conditions. Medium blow fuses operate with standard thermal characteristics. Slow blow fuses are designed to tolerate temporary inrush currents without nuisance operation while still providing protection against sustained overcurrent. Selection depends on the specific application circuit requirements.

Q: Can Littelfuse 20102000021P be substituted for BK/GMC-200MA?

A: Yes, based on core electrical and mechanical parameters. Both parts have 200 mA current rating, 250 V AC voltage rating, medium blow response time, and 5mm x 20mm package dimensions. The Littelfuse part features higher breaking capacity (80A versus 35A) and higher melting I²t value (0.12 versus 0.032). Substitution is valid when the application circuit design accommodates these higher electrical characteristics.

Q: Are all substitute parts RoHS compliant?

A: The original BK/GMC-200MA is RoHS non-compliant. All substitute parts listed (BK/GMC-200-R, BK1/GMC-200-R, GMC-200-R, and all Littelfuse parts) are ROHS3 compliant. This represents an improvement in environmental compliance for new designs or replacement applications.

Q: What certifications apply to these fuse cartridges?

A: Eaton GMC series parts carry CSA, KC-MARK, and UL approvals. Littelfuse 218 series parts (0218.200HXP, 0218.200MXP) carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE approvals. Littelfuse 201 series parts (20102000001, 20102000001P, 20102000021, 20102000021P, 20102000301P) carry cULus certification. Selection should confirm that the required certifications for the application are present on the chosen substitute part.

Q: Do all substitute parts use the same 5mm x 20mm holder?

A: Yes. All substitute parts listed maintain the 5mm x 20mm package dimension and require a compatible fuse holder. Physical interchangeability is confirmed across all listed parts.

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