Equivalent & Substitute Parts for 5MT 200-R

Part Overview

The 5MT 200-R is a 200 mA, 250 V AC/DC glass cartridge fuse manufactured by Bel Fuse Inc. in a 5mm x 20mm form factor with medium blow response characteristics. This part is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new designs. Substitute parts must maintain electrical compatibility across current rating, voltage rating, package dimensions, and mechanical mounting requirements while accounting for differences in response time characteristics and thermal performance parameters.

Substiute Parts

5MT 200-R

Bel Fuse Inc.In Stock: 11645MT 200-R Datasheet

Current PartRFQ

0218.200HXP

Littelfuse Inc.In Stock: 23820218.200HXP Datasheet

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0218.200MXP

Littelfuse Inc.In Stock: 40760218.200MXP Datasheet

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20102000001

LittelfuseIn Stock: 89720102000001 Datasheet

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20102000021

Littelfuse Inc.In Stock: 78820102000021 Datasheet

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BK/GMC-200-R

Eaton - Electronics DivisionIn Stock: 1156BK/GMC-200-R Datasheet

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BK1/GMC-200-R

Eaton - Electronics DivisionIn Stock: 1870BK1/GMC-200-R Datasheet

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GDC-200MA

Eaton - Electronics DivisionIn Stock: 1231GDC-200MA Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility is determined by strict alignment with the following electrical and mechanical parameters:

Primary Compatibility Criteria:

• Current Rating: 200 mA (exact match required)
• Voltage Rating (AC): 250 V (exact match required)
• Package / Case: 5mm x 20mm (exact match required)
• Fuse Type: Cartridge, Glass (exact match required)
• Mounting Type: Requires Holder (exact match required)

Secondary Consideration Parameters:

• Response Time: Medium Blow preferred; Slow Blow variants acceptable with circuit analysis
• Breaking Capacity: 35A or higher acceptable
• Operating Temperature: -55°C ~ 125°C preferred; narrower ranges acceptable if application permits
• Approval Agencies: CE, CSA, cULus certifications preferred for regulatory compliance

All substitute parts listed meet the primary compatibility criteria. Differences in response time, melting I²t, DC cold resistance, and approval agencies are noted for engineering selection based on specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

Medium Blow Response (Preferred for Direct Replacement):

The BK/GMC-200-R and BK1/GMC-200-R from Eaton - Electronics Division are the closest functional equivalents to the 5MT 200-R. Both maintain medium blow response characteristics, identical current and voltage ratings, and 5mm x 20mm package dimensions. These parts are active products with CSA, KC-MARK, and UL certifications. The primary difference is lower melting I²t (0.032 vs. 0.11), which indicates faster thermal response. Both parts are available in bulk packaging with substantial inventory.

The Littelfuse 20102000001 and 20102000021 (Series 201) also provide medium blow response with identical electrical ratings and package dimensions. These parts feature higher breaking capacity (80A vs. 35A) and are cULus certified. Operating temperature range is narrower (-25°C ~ 70°C vs. -55°C ~ 125°C). Both are active products with adequate inventory.

Slow Blow Response (Alternative for Specific Applications):

The Littelfuse 0218.200HXP and 0218.200MXP (Series 218) provide slow blow response with identical electrical ratings and package dimensions. Melting I²t is higher (0.341 vs. 0.11), indicating slower thermal response suitable for circuits with inrush current characteristics. These parts carry broader approval certifications (CCC, CE, CSA, K-MARK, SEMKO, UL, VDE) and maintain the full operating temperature range (-55°C ~ 125°C). Both are active products with high inventory availability.

The Eaton GDC-200MA (Series GDC) provides slow blow response with identical electrical ratings and package dimensions. Melting I²t is comparable to the original part (0.114 vs. 0.11). This part is cURus and IMQ certified and is an active product.

Selection Basis:

Choose medium blow variants (BK/GMC-200-R, BK1/GMC-200-R, or Series 201) for direct replacement in circuits designed for the 5MT 200-R response characteristics. Choose slow blow variants (0218.200HXP, 0218.200MXP, or GDC-200MA) only if circuit analysis confirms compatibility with slower thermal response and higher inrush current tolerance.

Frequently Asked Questions (FAQ)

Q: Can I use a slow blow fuse as a direct replacement for the 5MT 200-R medium blow fuse?

A: Slow blow and medium blow fuses have different thermal response characteristics. Slow blow fuses tolerate higher inrush currents and respond more slowly to overcurrent conditions. Direct substitution requires circuit analysis to confirm the application can tolerate the slower response time. If the original circuit was designed for medium blow protection, use medium blow substitutes (BK/GMC-200-R, BK1/GMC-200-R, or Series 201 parts) unless circuit requirements have changed.

Q: What is the difference between the Littelfuse Series 218 (0218.200HXP, 0218.200MXP) and Series 201 (20102000001, 20102000021) parts?

A: Series 218 parts provide slow blow response with melting I²t of 0.341 and maintain the full operating temperature range (-55°C ~ 125°C). Series 201 parts provide medium blow response with melting I²t of 0.12 and operate within -25°C ~ 70°C. Series 218 is suitable for circuits with inrush current; Series 201 is suitable for direct replacement in medium blow applications with standard temperature requirements.

Q: Are the Eaton BK/GMC-200-R and BK1/GMC-200-R interchangeable?

A: Both parts are functionally equivalent with identical electrical ratings, response time, package dimensions, and DC cold resistance. Both are medium blow 200 mA, 250 V AC/DC fuses in 5mm x 20mm form factor. Selection between them depends on availability and specific certification requirements for your application (both carry CSA, KC-MARK, and UL certifications).

Q: Why does the 5MT 200-R have higher DC cold resistance (3.39 Ω) compared to substitute parts?

A: DC cold resistance varies based on internal fuse element design and material composition. Higher resistance in the original part does not affect substitution eligibility if all other electrical parameters match. However, if your circuit includes resistance-sensitive measurements or low-voltage sensing circuits, verify that the substitute part's lower resistance (typically 1–1.6 Ω) does not affect circuit performance.

Q: Can I substitute a 5MT 200-R with a part that has higher breaking capacity (80A vs. 35A)?

A: Yes. Higher breaking capacity indicates the fuse can safely interrupt larger fault currents. This is a conservative substitution that does not compromise circuit protection. The Littelfuse Series 201 parts (20102000001, 20102000021) with 80A breaking capacity are suitable replacements for applications where the original 35A breaking capacity is adequate.

Q: What certifications should I verify for my application?

A: The original 5MT 200-R carries CE, CSA, and cULus certifications. Substitute parts carry varying certification combinations. Verify that your substitute part includes certifications required by your application's regulatory standards. For North American applications, UL or cULus certification is typically required. For European applications, CE certification is required. Consult your system's regulatory documentation to confirm required certifications.