GMC-200MA Equivalent & Substitute Parts Reference

Part Overview

The GMC-200MA is a 200 mA glass cartridge fuse rated for 250 V AC/DC operation in a 5mm x 20mm form factor, manufactured by Eaton - Electronics Division. This fuse requires a compatible holder for installation and is classified as a medium blow response cartridge fuse. The part is currently in active production status with 921 pieces in stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, and functional specifications to ensure direct interchangeability in circuit protection applications.

Substiute Parts

GMC-200MA

Eaton - Electronics DivisionIn Stock: 980GMC-200MA Datasheet

Current PartRFQ

GMC-200-R

Eaton - Electronics DivisionIn Stock: 1026GMC-200-R Datasheet

DirectRFQ

BK/GMC-200-R

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

Parametric EquivalentRFQ

BK1/GMC-200-R

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

Parametric EquivalentRFQ

20102000001

LittelfuseIn Stock: 89720102000001 Datasheet

Parametric EquivalentRFQ

20102000001P

Littelfuse Inc.In Stock: 112020102000001P Datasheet

Parametric EquivalentRFQ

20102000021

Littelfuse Inc.In Stock: 78820102000021 Datasheet

Parametric EquivalentRFQ

20102000021P

Littelfuse Inc.In Stock: 108920102000021P Datasheet

Parametric EquivalentRFQ

20102000301P

Littelfuse Inc.In Stock: 93320102000301P Datasheet

Parametric EquivalentRFQ

MSC-200MA

OptiFuseIn Stock: 2505MSC-200MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for GMC-200MA are grouped into two categories based on parametric equivalence:

Category 1: Eaton GMC Series (Direct Manufacturer Equivalents) Substitutes GMC-200-R, BK/GMC-200-R, and BK1/GMC-200-R are manufactured by Eaton - Electronics Division within the same GMC series. These parts match all critical electrical parameters: 200 mA current rating, 250 V AC voltage rating, medium blow response, and 5mm x 20mm mechanical dimensions. Breaking capacity is rated at 35A with melting I²t of 0.032. Approval agencies include CSA, KC-MARK, and UL. These parts are functionally identical to the main part GMC-200MA and represent the primary substitution option within the Eaton product line.

Category 2: Cross-Manufacturer Equivalents (Littelfuse and OptiFuse) Substitutes 20102000001, 20102000001P, 20102000021, 20102000021P, 20102000301P (Littelfuse Inc.) and MSC-200MA (OptiFuse) match the core electrical and mechanical specifications: 200 mA current rating, 250 V AC voltage rating, medium blow response, and 5mm x 20mm package dimensions. These parts are manufactured by different suppliers but maintain parametric equivalence through identical current, voltage, and physical form factors. Breaking capacity ratings are higher (80A for Littelfuse series, 100A for OptiFuse MSC-200MA), and melting I²t values differ (0.12 for Littelfuse, 0.08063 for OptiFuse), reflecting different thermal characteristics within acceptable operating parameters. All parts carry cULus or UL certifications and are ROHS3 compliant.

Key Parameters Determining Substitutability:

• 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)
• Response Time: Medium Blow (exact match required)
• Mounting Type: Requires Holder (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Eaton GMC Series): GMC-200-R, BK/GMC-200-R, and BK1/GMC-200-R are the preferred substitutes for GMC-200MA. These parts are manufactured by the same supplier (Eaton - Electronics Division) and maintain identical electrical specifications and breaking capacity ratings. All three variants carry active product status and hold CSA, KC-MARK, and UL certifications. BK1/GMC-200-R offers the highest inventory availability at 1855 pieces. Selection among these three Eaton variants is based on packaging designation and internal supply chain requirements, as they are functionally equivalent.

Secondary Substitutes (Littelfuse 201 Series): Parts 20102000001, 20102000001P, 20102000021, 20102000021P, and 20102000301P from Littelfuse Inc. are parametrically equivalent substitutes with higher breaking capacity (80A) and higher melting I²t (0.12). These parts carry cULus certification and are ROHS3 compliant. The 201P series variants (20102000001P, 20102000021P, 20102000301P) are designated for specific packaging requirements. Littelfuse parts are suitable for applications where higher breaking capacity is acceptable or beneficial.

Tertiary Substitute (OptiFuse MSC Series): MSC-200MA from OptiFuse represents the highest breaking capacity option at 100A with melting I²t of 0.08063. This part carries cULus and UL 248 certifications and offers the largest inventory availability at 2475 pieces. MSC-200MA is suitable for applications requiring enhanced fault current handling capability within the 200 mA, 250 V AC rating envelope.

Selection Criteria:

• For direct manufacturer continuity: Select GMC-200-R, BK/GMC-200-R, or BK1/GMC-200-R
• For higher breaking capacity: Select Littelfuse 201 series (80A) or OptiFuse MSC-200MA (100A)
• For maximum inventory availability: Select BK1/GMC-200-R (1855 pcs) or MSC-200MA (2475 pcs)
• For specific certification requirements: Verify approval agency match with system requirements

All substitute parts maintain active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can GMC-200MA be directly replaced with GMC-200-R? A: Yes. GMC-200-R is a direct substitute manufactured by Eaton - Electronics Division with identical electrical ratings (200 mA, 250 V AC), response time (medium blow), mechanical dimensions (5mm x 20mm), and breaking capacity (35A). Both parts require a compatible fuse holder and carry equivalent certifications.

Q: What is the difference between Eaton GMC variants (GMC-200-R, BK/GMC-200-R, BK1/GMC-200-R)? A: These three Eaton parts are functionally identical in electrical and mechanical specifications. The designations (GMC-200-R, BK/GMC-200-R, BK1/GMC-200-R) reflect different packaging or internal product line classifications within Eaton's supply chain. Selection is based on availability and packaging requirements rather than technical performance differences.

Q: How do Littelfuse 201 series parts differ from Eaton GMC parts? A: Littelfuse 201 series parts (20102000001, 20102000001P, 20102000021, 20102000021P, 20102000301P) match the core electrical specifications (200 mA, 250 V AC, medium blow, 5mm x 20mm) but feature higher breaking capacity (80A versus 35A) and higher melting I²t (0.12 versus 0.032). These differences reflect different thermal and fault current handling characteristics while maintaining the same nominal current rating and voltage rating.

Q: Is OptiFuse MSC-200MA compatible with GMC-200MA? A: Yes. MSC-200MA is parametrically equivalent with matching current rating (200 mA), voltage rating (250 V AC), response time (medium blow), and mechanical dimensions (5mm x 20mm). MSC-200MA features the highest breaking capacity (100A) and lowest melting I²t (0.08063) among all substitutes, indicating enhanced fault current capability. Both parts require a compatible fuse holder.

Q: What does "requires holder" mean for these fuse parts? A: These are cartridge fuses that must be installed in a dedicated fuse holder or clip assembly. The fuse itself does not have threaded terminals or direct mounting provisions. The holder provides electrical contact and mechanical retention. When substituting fuses, ensure the holder is compatible with the 5mm x 20mm cartridge form factor.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All substitute parts listed (Eaton GMC series, Littelfuse 201 series, and OptiFuse MSC-200MA) are ROHS3 compliant, meeting environmental and hazardous substance restrictions.

Q: Which substitute offers the best inventory availability? A: OptiFuse MSC-200MA offers the highest inventory at 2475 pieces. Among Eaton parts, BK1/GMC-200-R provides 1855 pieces. Among Littelfuse parts, 20102000021P offers 1066 pieces.

Q: Can I use a 200 mA fuse rated for 125 V AC instead of 250 V AC? A: No. Voltage rating is a critical parameter that cannot be substituted downward. A 250 V AC fuse must be used in 250 V AC circuits. Using a lower voltage-rated fuse creates a safety hazard and violates electrical standards.

Q: What is the significance of melting I²t values? A: Melting I²t indicates the thermal energy required to melt the fuse element. Lower I²t values (Eaton 0.032, OptiFuse 0.08063) indicate faster response to overcurrent. Higher I²t values (Littelfuse 0.12) indicate slower thermal response. All values are acceptable for 200 mA medium blow cartridge fuses, but the difference reflects design variations between manufacturers.

Q: Are the "P" designations in Littelfuse part numbers significant? A: The "P" designation indicates a specific product line variant within Littelfuse's 201 series (201P series). Parts with "P" designation (20102000001P, 20102000021P, 20102000301P) are functionally equivalent to their non-P counterparts (20102000001, 20102000021) in electrical and mechanical specifications. Selection is based on packaging or supply chain requirements.