GMD-2-R Equivalent & Substitute Parts

Part Overview

The GMD-2-R is a 2 A, 250 V AC/DC slow-blow glass cartridge fuse with a 5mm x 20mm form factor manufactured by Eaton - Electronics Division. This fuse is designed for applications requiring holder-based installation and is classified as Active product status. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval certifications to ensure functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Slow Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	100 A
Melting I²t	42
DC Cold Resistance	0.107 Ohms
RoHS Status	ROHS3 Compliant
Approval Agencies	CSA, PSE/JET, UL

Substitute Part Grouping Explanation

Substitute parts for the GMD-2-R are classified into two categories based on electrical and mechanical compatibility:

Direct Manufacturer Equivalents (Eaton - Electronics Division): Parts BK/GMD-2-R, BK/GDC-2A, BK/S506-2-R, GDC-2A, and S506-2-R share identical current ratings (2 A), voltage ratings (250 V AC), response characteristics (Slow Blow), and mechanical dimensions (5mm x 20mm). These parts maintain the same functional performance envelope and are interchangeable within the same holder assembly.

Cross-Manufacturer Equivalents (Littelfuse Inc.): Parts 0239002.HXP, 0239002.MXP, 0239002.TXP, and 0239002.VXP from Littelfuse Inc. match the core electrical specifications (2 A, 250 V AC, Slow Blow, 5mm x 20mm) and breaking capacity (100 A). Part 0213002.MXP is classified as a similar part due to differences in melting I²t (92.705 versus 42) and breaking capacity (35 A versus 100 A).

Substitution eligibility is determined by:

Current Rating: 2 A (mandatory match)
Voltage Rating: 250 V AC (mandatory match)
Response Time: Slow Blow (mandatory match)
Mechanical Form Factor: 5mm x 20mm (mandatory match)
Mounting Type: Requires Holder (mandatory match)

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage (V AC)	Response	Package	Breaking Capacity (A)	Melting I²t	DC Resistance (Ω)	Approval Agencies
GMD-2-R	Eaton	2	250	Slow Blow	5x20mm	100	42	0.107	CSA, PSE/JET, UL
BK/GMD-2-R	Eaton	2	250	Slow Blow	5x20mm	100	42	0.107	CSA, PSE/JET, UL
BK/GDC-2A	Eaton	2	250	Slow Blow	5x20mm	35	31.6	0.03325	cULus, IMQ, MITI/JET
BK/S506-2-R	Eaton	2	250	Slow Blow	5x20mm	35	31.6	0.03325	BSI, CCC, CSA, CURUS, IMQ, PSE/JET, SEMKO, VDE
GDC-2A	Eaton	2	250	Slow Blow	5x20mm	35	31.6	0.03325	cURus, IMQ, MITI/JET
S506-2-R	Eaton	2	250	Slow Blow	5x20mm	35	31.6	0.03325	BSI, CCC, CSA, CURUS, IMQ, PSE/JET, SEMKO, VDE
0239002.HXP	Littelfuse	2	250	Slow Blow	5x20mm	100	50.585	0.0943	CE, CSA, KC, PSE, UL
0239002.MXP	Littelfuse	2	250	Slow Blow	5x20mm	100	50.585	0.0943	CE, CSA, KC, PSE, UL
0239002.TXP	Littelfuse	2	250	Slow Blow	5x20mm	100	50.585	0.0943	CE, CSA, KC, PSE, UL
0239002.VXP	Littelfuse	2	250	Slow Blow	5x20mm	100	50.585	0.0943	CE, CSA, KC, PSE, UL
0213002.MXP	Littelfuse	2	250	Slow Blow	5x20mm	35	92.705	0.0452	BSI, CCC, CE, CSA, PSE, SEMKO, UR, VDE

Engineering Selection Recommendations

Direct Equivalents with Identical Specifications:

BK/GMD-2-R is a direct equivalent to GMD-2-R, maintaining identical electrical parameters, breaking capacity, and melting I²t characteristics. Both parts carry CSA, PSE/JET, and UL certifications and are suitable for direct substitution in applications where the original part is specified.

Eaton Series Alternatives (GDC and S506):

Parts BK/GDC-2A, GDC-2A, BK/S506-2-R, and S506-2-R are functionally equivalent in current rating, voltage, response time, and mechanical form factor. These parts differ in breaking capacity (35 A versus 100 A) and melting I²t values (31.6 versus 42). Selection between these alternatives depends on circuit protection requirements and approval certifications needed for the application. The S506 series offers broader international certification coverage (BSI, CCC, CSA, CURUS, IMQ, PSE/JET, SEMKO, VDE).

Littelfuse Cross-Manufacturer Alternatives:

Littelfuse parts 0239002.HXP, 0239002.MXP, 0239002.TXP, and 0239002.VXP provide equivalent electrical performance with 100 A breaking capacity matching the GMD-2-R. These parts carry CE, CSA, KC, PSE, and UL certifications. The melting I²t value (50.585) is higher than the GMD-2-R (42), indicating slightly different thermal response characteristics. DC cold resistance (0.0943 Ohms) differs from the GMD-2-R (0.107 Ohms).

Similar Part with Derating Considerations:

Littelfuse 0213002.MXP shares the core electrical specifications but exhibits significantly different thermal characteristics (melting I²t of 92.705 versus 42) and reduced breaking capacity (35 A versus 100 A). This part is classified as similar rather than directly equivalent and requires application-specific evaluation.

Frequently Asked Questions (FAQ)

Q: Can BK/GMD-2-R be used as a direct replacement for GMD-2-R?

A: Yes. BK/GMD-2-R is a direct manufacturer equivalent with identical current rating (2 A), voltage rating (250 V AC), response time (Slow Blow), mechanical dimensions (5mm x 20mm), breaking capacity (100 A), and melting I²t (42). Both parts carry the same approval certifications (CSA, PSE/JET, UL).

Q: What is the difference between the GMD series and the GDC/S506 series?

A: All series maintain identical current, voltage, response time, and mechanical specifications. The primary differences are breaking capacity (GMD: 100 A; GDC/S506: 35 A) and melting I²t values (GMD: 42; GDC/S506: 31.6). Selection depends on the circuit protection requirements and required approval certifications for the specific application.

Q: Are Littelfuse 0239002 series parts compatible with the GMD-2-R?

A: Littelfuse 0239002.HXP, 0239002.MXP, 0239002.TXP, and 0239002.VXP are electrically compatible with the GMD-2-R in terms of current rating, voltage, response time, and mechanical form factor. All parts fit the same 5mm x 20mm holder. Differences exist in melting I²t (50.585 versus 42) and DC cold resistance (0.0943 Ohms versus 0.107 Ohms). Approval certifications differ (Littelfuse: CE, CSA, KC, PSE, UL; Eaton GMD-2-R: CSA, PSE/JET, UL).

Q: What does melting I²t indicate and why does it vary between equivalent parts?

A: Melting I²t is a thermal characteristic that defines the fuse's response to overcurrent conditions. Higher melting I²t values indicate slower thermal response. Variations between equivalent parts reflect different internal construction and material composition while maintaining the same current rating and voltage specification. Application requirements determine whether a specific melting I²t value is necessary.

Q: Can 0213002.MXP be used instead of GMD-2-R?

A: 0213002.MXP shares the core electrical specifications (2 A, 250 V AC, Slow Blow, 5mm x 20mm) but differs significantly in melting I²t (92.705 versus 42) and breaking capacity (35 A versus 100 A). This part is classified as similar rather than directly equivalent. Application-specific evaluation is required to determine suitability.

Q: What holder assembly is required for these fuses?

A: All listed parts require a holder assembly compatible with 5mm x 20mm cartridge fuses. The specific holder model depends on the application circuit design and mounting configuration. Consult the equipment manufacturer's documentation for the correct holder specification.

Q: Are all listed parts RoHS3 compliant?

A: All listed parts are RoHS3 compliant. Littelfuse parts carry additional REACH Unaffected status. Eaton parts carry ROHS3 Compliant designation with REACH Unaffected status noted for specific variants.

Q: What approval certifications should I verify for my application?

A: Verify that the selected fuse part carries the approval certifications required by your application's regulatory framework. GMD-2-R carries CSA, PSE/JET, and UL certifications. Alternative parts carry different certification combinations. Littelfuse 0239002 series carries CE, CSA, KC, PSE, and UL. Eaton S506 series carries the broadest certification coverage including BSI, CCC, CSA, CURUS, IMQ, PSE/JET, SEMKO, and VDE.

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