5MT 2 Glass Cartridge Fuse - Equivalent & Substitute Parts

Part Overview

The 5MT 2 is a 2A 250VAC glass cartridge fuse manufactured by Bel Fuse Inc., designed for 5mm x 20mm holder applications. This component features medium blow response characteristics with a 100A breaking capacity at rated voltage. The part is classified as obsolete, making equivalent substitutes necessary for ongoing system maintenance and new designs. Substitute parts must maintain identical electrical ratings, mechanical dimensions, and holder compatibility while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Current Rating	2 A
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Response Time	Medium Blow
Breaking Capacity @ Rated Voltage	100A
Operating Temperature Range	-55°C ~ 125°C

Substitute Part Grouping Explanation

Substitution eligibility for the 5MT 2 is determined by the following mandatory parameters:

Current Rating: 2 A (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)
Fuse Type: Cartridge, Glass (exact match required)

Response time characteristics (medium blow vs. slow blow) and breaking capacity variations are secondary parameters that may differ between substitutes depending on application requirements. All substitute parts listed maintain the primary electrical and mechanical specifications necessary for direct replacement in 5MT 2 holder assemblies.

Parameter Comparison

Part Number	Manufacturer	Current (A)	Voltage (V AC)	Response Time	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ω)	Product Status	RoHS Status
5MT 2	Bel Fuse Inc.	2	250	Medium Blow	100	20	0.055	Obsolete	Non-compliant
0213002.MXP	Littelfuse Inc.	2	250	Slow Blow	35	92.705	0.0452	Active	ROHS3 Compliant
0218002.HXP	Littelfuse Inc.	2	250	Slow Blow	35	14.45	0.0293	Active	ROHS3 Compliant
0218002.MXP	Littelfuse Inc.	2	250	Slow Blow	35	14.45	0.0293	Active	ROHS3 Compliant
0218002.TXP	Littelfuse Inc.	2	250	Slow Blow	35	14.45	0.0293	Active	ROHS3 Compliant
0232002.MXP	Littelfuse Inc.	2	250	Medium Blow	100	8.25	0.037	Active	ROHS3 Compliant
0239002.HXP	Littelfuse Inc.	2	250	Slow Blow	100	50.585	0.0943	Active	ROHS3 Compliant
BK1/GMC-2-R	Eaton - Electronics Division	2	250	Medium Blow	100	8.9	0.043	Active	ROHS3 Compliant
BK1/GMD-2-R	Eaton - Electronics Division	2	250	Slow Blow	100	42	0.107	Active	ROHS3 Compliant
GDC-2A	Eaton - Electronics Division	2	250	Slow Blow	35	31.6	0.03325	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts maintain the mandatory electrical and mechanical specifications (2A, 250VAC, 5mm x 20mm, cartridge glass type) required for direct replacement in 5MT 2 holder assemblies.

For applications requiring medium blow response characteristics matching the original 5MT 2, select from: 0232002.MXP (Littelfuse), BK1/GMC-2-R (Eaton), or BK1/GMD-2-R (Eaton slow blow variant).

For applications where slow blow response is acceptable, Littelfuse 0213002.MXP, 0218002 series (HXP/MXP/TXP variants), 0239002.HXP, and Eaton GDC-2A provide active product status with current manufacturing support.

The 0232002.MXP and BK1/GMC-2-R offer the closest electrical characteristics to the original 5MT 2, including matching 100A breaking capacity and medium blow response. Both are ROHS3 compliant and actively manufactured.

All substitute parts are certified to international standards including CE, CSA, UL, and PSE, ensuring compliance with current regulatory requirements across major markets.

Frequently Asked Questions (FAQ)

Q: Can I use a slow blow fuse as a substitute for the medium blow 5MT 2?

A: Slow blow and medium blow fuses have different melting I²t characteristics and response times. Selection depends on circuit protection requirements. Verify application specifications before substitution.

Q: Are all substitute parts compatible with existing 5MT 2 holders?

A: Yes. All listed substitutes maintain the 5mm x 20mm package dimension and cartridge glass type, ensuring mechanical and electrical compatibility with standard 5MT 2 holders.

Q: What is the difference between Littelfuse 0218002.HXP, 0218002.MXP, and 0218002.TXP?

A: These variants are from the same 218 series with identical electrical ratings (2A, 250VAC, slow blow). Differences exist in approval agency certifications and packaging configurations. All are functionally equivalent for the 5MT 2 application.

Q: Why does the 0232002.MXP have a lower melting I²t (8.25) compared to the original 5MT 2 (20)?

A: Melting I²t values reflect thermal response characteristics. The 0232002.MXP provides faster thermal response while maintaining the same current and voltage ratings. Application circuit analysis determines suitability.

Q: Are substitute parts RoHS compliant?

A: All active substitute parts listed are ROHS3 compliant. The original 5MT 2 is marked as RoHS non-compliant due to its obsolete status.

Q: Which substitute offers the highest breaking capacity?

A: Multiple substitutes (0232002.MXP, 0239002.HXP, BK1/GMC-2-R, BK1/GMD-2-R) provide 100A breaking capacity, matching the original 5MT 2 specification.

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