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

Part Overview

The BK/GMD-200MA is a 200 mA, 250 V AC/DC slow-blow glass fuse cartridge in 5mm x 20mm form factor manufactured by Eaton Electronics Division. This component is classified as obsolete product status. Due to its obsolescence, equivalent and substitute parts from active product lines are necessary to maintain circuit protection functionality in applications requiring 200 mA rated fuses with 250 V AC/DC voltage rating and slow-blow response characteristics. Substitute parts maintain identical electrical and mechanical specifications while offering improved availability and compliance status.

Key Parameters

Parameter	Value
Current Rating	200 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict equivalence across the following parameters: current rating (200 mA), voltage rating (250 V AC), fuse type (cartridge glass), response time (slow blow), package dimensions (5mm x 20mm), and breaking capacity (35A). All substitute parts listed maintain these core electrical and mechanical specifications. Substitute parts are grouped into two categories: direct manufacturer equivalents from Eaton Electronics Division and cross-manufacturer alternatives from Littelfuse Inc. Within each category, parts are further differentiated by product status (active versus obsolete), RoHS compliance level, and approval agency certifications.

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (mA)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	Product Status	RoHS Status	Approval Agencies
BK/GMD-200MA	Eaton	GMD	200	250	Slow Blow	5x20mm	35	0.2	Obsolete	Non-compliant	CSA, UL
BK/GMD-200-R	Eaton	GMD	200	250	Slow Blow	5x20mm	35	0.2	Active	ROHS3 Compliant	CSA, UL
BK/GDC-200MA	Eaton	GDC	200	250	Slow Blow	5x20mm	35	0.114	Active	RoHS Compliant	cULus, IMQ
BK/S506-200-R	Eaton	S506	200	250	Slow Blow	5x20mm	35	0.114	Active	ROHS3 Compliant	BSI, CCC, CSA, IMQ, SEMKO, UR, VDE
BK1/GMD-200-R	Eaton	GMD	200	250	Slow Blow	5x20mm	35	0.2	Active	ROHS3 Compliant	CSA, UL
BK1/S506-200-R	Eaton	S506	200	250	Slow Blow	5x20mm	35	0.114	Active	ROHS3 Compliant	BSI, CCC, CSA, IMQ, SEMKO, UR, VDE
GDC-200MA	Eaton	GDC	200	250	Slow Blow	5x20mm	35	0.114	Active	RoHS Compliant	cURus, IMQ
GMD-200-R	Eaton	GMD	200	250	Slow Blow	5x20mm	35	0.2	Active	ROHS3 Compliant	CSA, UL
S506-200-R	Eaton	S506	200	250	Slow Blow	5x20mm	35	0.114	Active	ROHS3 Compliant	BSI, CCC, CSA, IMQ, SEMKO, UR, VDE
0239.200MXP	Littelfuse	239	200	250	Slow Blow	5x20mm	35	0.165	Active	ROHS3 Compliant	CE, CSA, KC, UL
0239.200TXP	Littelfuse	239	200	250	Slow Blow	5x20mm	35	0.165	Active	ROHS3 Compliant	CE, CSA, KC, UL

Engineering Selection Recommendations

Primary Recommendation - Eaton GMD Series (Active Status): BK/GMD-200-R, BK1/GMD-200-R, and GMD-200-R are direct series equivalents to the obsolete BK/GMD-200MA. These parts maintain identical melting I²t value (0.2), CSA and UL certifications, and DC cold resistance (5.19 Ohms). All three variants are active product status with ROHS3 compliance. Selection among these three variants depends on packaging requirements and inventory availability.

Secondary Recommendation - Eaton S506 Series (Broadest Certification): BK/S506-200-R, BK1/S506-200-R, and S506-200-R offer the widest approval agency coverage (BSI, CCC, CSA, IMQ, SEMKO, UR, VDE) and ROHS3 compliance. These parts feature lower melting I²t (0.114) and DC cold resistance (1 Ohm) compared to GMD series. Selection is appropriate for applications requiring international certifications or when lower thermal characteristics are acceptable.

Tertiary Recommendation - Eaton GDC Series (Alternative Certification Path): BK/GDC-200MA and GDC-200MA provide cULus and IMQ certifications with RoHS compliance. Melting I²t (0.114) and DC cold resistance (1 Ohm) match S506 series characteristics. These parts are suitable for applications where cULus certification is specified.

Cross-Manufacturer Alternative - Littelfuse 239 Series: 0239.200MXP and 0239.200TXP are active Littelfuse products with CE, CSA, KC, and UL certifications and ROHS3 compliance. Melting I²t value (0.165) and DC cold resistance (3.8725 Ohms) position these parts between Eaton GMD and S506/GDC series. Operating temperature range (-55°C to 125°C) is specified. Selection is appropriate when Littelfuse supply chain or certification requirements are primary considerations.

Frequently Asked Questions (FAQ)

Q: Can BK/GMD-200MA be directly replaced with BK/GMD-200-R? A: Yes. Both parts share identical electrical parameters (200 mA, 250 V AC, slow-blow response, 35A breaking capacity, 5x20mm package). BK/GMD-200-R is the active product equivalent with improved RoHS compliance status.

Q: What is the difference between Eaton GMD and S506 series substitutes? A: Both series maintain identical current, voltage, and package specifications. GMD series retains melting I²t of 0.2 and DC cold resistance of 5.19 Ohms, matching the original BK/GMD-200MA. S506 series features lower melting I²t (0.114) and DC cold resistance (1 Ohm), with broader international certification coverage (BSI, CCC, CSA, IMQ, SEMKO, UR, VDE versus CSA, UL).

Q: Are Littelfuse 0239.200MXP and 0239.200TXP compatible replacements? A: Yes. These parts meet all core electrical and mechanical requirements (200 mA, 250 V AC, slow-blow, 35A breaking capacity, 5x20mm). Melting I²t (0.165) and DC cold resistance (3.8725 Ohms) differ from the original but remain within acceptable substitution parameters. Littelfuse parts include specified operating temperature range (-55°C to 125°C).

Q: What does "Requires Holder" mean for mounting type? A: All listed parts are cartridge fuses requiring a separate fuse holder for installation. The 5mm x 20mm form factor is standardized across all substitute parts, ensuring mechanical compatibility with existing holders designed for this package size.

Q: Which substitute offers the best compliance for new designs? A: S506-200-R series offers the broadest approval agency coverage (BSI, CCC, CSA, IMQ, SEMKO, UR, VDE) and ROHS3 compliance, making it suitable for applications requiring international market certification. Littelfuse 0239.200MXP and 0239.200TXP provide CE marking in addition to CSA and UL certifications.

Q: Can I use GDC-200MA as a substitute for GMD-200MA? A: Yes, from electrical and mechanical perspectives. GDC-200MA maintains 200 mA, 250 V AC, slow-blow response, and 5x20mm package. Certifications differ (cULus, IMQ versus CSA, UL), and melting I²t is lower (0.114 versus 0.2). Verify certification requirements for your specific application before selection.

Q: What inventory availability should I consider? A: Littelfuse 0239.200MXP has the highest inventory (2167 pcs), followed by BK1/S506-200-R (1729 pcs) and GDC-200MA (1149 pcs). Eaton S506-200-R and BK/GMD-200-R offer 1142 and 852 pcs respectively. Original BK/GMD-200MA (715 pcs) is obsolete and should not be selected for new procurement.

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