GMD-750-R Equivalent & Substitute Parts

Part Overview

The GMD-750-R is a 750 mA, 250 V AC/DC glass cartridge fuse manufactured by Eaton - Electronics Division. This slow-blow fuse is designed for applications requiring overcurrent protection in a 5mm x 20mm form factor and requires a compatible fuse holder for installation. The part is active in production with 1055 pieces in current inventory stock. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and regulatory approvals to ensure direct functional interchangeability in circuit protection applications.

Substiute Parts

GMD-750-R

Eaton - Electronics DivisionIn Stock: 1147GMD-750-R Datasheet

Current PartRFQ

BK/GMD-750-R

Eaton - Electronics DivisionIn Stock: 1120BK/GMD-750-R Datasheet

DirectRFQ

BK1/GMD-750-R

Eaton - Electronics DivisionIn Stock: 908BK1/GMD-750-R Datasheet

Parametric EquivalentRFQ

0239.750MXP

Littelfuse Inc.In Stock: 12970239.750MXP Datasheet

DirectRFQ

0239.750TXP

Littelfuse Inc.In Stock: 9200239.750TXP Datasheet

DirectRFQ

0034.3773

SCHURTER Inc.In Stock: 11180034.3773 Datasheet

Parametric EquivalentRFQ

TSC-750MA

OptiFuseIn Stock: 4826TSC-750MA Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GMD-750-R are classified based on strict electrical and mechanical parameter matching:

Direct Manufacturer Equivalents share identical specifications across all critical parameters: 750 mA current rating, 250 V AC voltage rating, slow-blow response time, 5mm x 20mm package dimensions, 35A breaking capacity, and glass cartridge construction. These parts are sourced from the same manufacturer (Eaton - Electronics Division) with different part number designations.

Parametric Equivalents from alternative manufacturers (Littelfuse Inc., SCHURTER Inc., OptiFuse) maintain the same electrical ratings (750 mA, 250 V AC), response characteristics (slow-blow), and physical dimensions (5mm x 20mm). These parts satisfy functional interchangeability requirements while meeting equivalent regulatory certifications (CSA, UL, cULus, CE, KC).

Key Parameters Determining Substitution:

• Current Rating: 750 mA (exact match required)
• Voltage Rating: 250 V AC (exact match required)
• Package Dimensions: 5mm x 20mm (exact match required)
• Response Time: Slow Blow (exact match required)
• Fuse Type: Glass Cartridge (exact match required)
• Mounting: Requires Holder (exact match required)

Parameter Comparison

Engineering Selection Recommendations

Direct Manufacturer Equivalents (BK/GMD-750-R, BK1/GMD-750-R): These Eaton - Electronics Division parts are functionally identical to the GMD-750-R across all electrical and mechanical parameters. Both maintain CSA and UL certifications and ROHS3 compliance. Selection between these variants and the primary GMD-750-R is based on availability and procurement requirements, with no technical differentiation.

Littelfuse Parametric Equivalents (0239.750MXP, 0239.750TXP): Both Littelfuse parts satisfy all critical electrical and mechanical requirements with 750 mA current rating, 250 V AC voltage rating, slow-blow response, and 5mm x 20mm dimensions. These parts provide expanded regulatory coverage (CE, CSA, KC, UL) and extended operating temperature range (-55°C ~ 125°C) compared to the primary part. Melting I²t values (5.425) and DC cold resistance (0.471 Ω) differ slightly from the GMD-750-R but remain within acceptable parametric equivalence for slow-blow cartridge fuses. Both parts hold ROHS3 compliance and REACH Unaffected status.

SCHURTER Parametric Equivalent (0034.3773): The SCHURTER FSL 5x20 series part maintains identical electrical ratings and mechanical dimensions. This part provides cULus certification and operates within -40°C ~ 85°C temperature range. Melting I²t (5.54) is comparable to Littelfuse variants. ROHS3 compliance and REACH Unaffected status are confirmed.

OptiFuse Parametric Equivalent (TSC-750MA): The TSC-750MA maintains the required 750 mA current rating, 250 V AC voltage rating, slow-blow response, and 5mm x 20mm package. This part features a higher breaking capacity (100A versus 35A) and lower melting I²t (0.835), indicating faster response characteristics within the slow-blow classification. cULus and UL 248 certifications are provided. Extended operating temperature (-55°C ~ 125°C) and ROHS3 compliance are confirmed. The higher breaking capacity and different melting I²t profile may be advantageous in applications requiring enhanced fault current handling.

Frequently Asked Questions (FAQ)

Q: Can I substitute GMD-750-R with BK/GMD-750-R or BK1/GMD-750-R?

A: Yes. Both BK/GMD-750-R and BK1/GMD-750-R are direct manufacturer equivalents from Eaton - Electronics Division with identical electrical ratings (750 mA, 250 V AC), response time (slow-blow), package dimensions (5mm x 20mm), breaking capacity (35A), and regulatory certifications (CSA, UL). These parts are functionally interchangeable with the GMD-750-R.

Q: What is the difference between Eaton GMD series and Littelfuse 0239 series fuses?

A: Both series maintain identical electrical specifications (750 mA, 250 V AC, slow-blow, 5mm x 20mm). The Littelfuse 0239 series provides broader regulatory coverage (CE, CSA, KC, UL versus CSA, UL) and extended operating temperature range (-55°C ~ 125°C). Melting I²t values differ slightly (5.425 for Littelfuse versus 4.7 for Eaton), but both remain within acceptable parametric equivalence for slow-blow cartridge fuses.

Q: Is the OptiFuse TSC-750MA suitable as a direct replacement?

A: The TSC-750MA maintains all critical electrical and mechanical parameters (750 mA, 250 V AC, slow-blow, 5mm x 20mm). However, the breaking capacity is higher (100A versus 35A) and melting I²t is lower (0.835 versus 4.7), indicating faster response within the slow-blow classification. This part is functionally equivalent but exhibits different thermal characteristics. Application-specific requirements must be evaluated before substitution.

Q: Do all substitute parts require the same fuse holder as GMD-750-R?

A: Yes. All substitute parts listed maintain the 5mm x 20mm package dimension and require a compatible 5mm x 20mm fuse holder. No holder modifications are necessary when substituting between these parts.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed (BK/GMD-750-R, BK1/GMD-750-R, 0239.750MXP, 0239.750TXP, 0034.3773, TSC-750MA) are ROHS3 compliant.

Q: Which substitute part has the highest inventory availability?

A: The OptiFuse TSC-750MA has the highest inventory with 4794 pieces in stock, followed by Littelfuse 0239.750MXP with 1227 pieces.

Q: What regulatory certifications are common across all parts?

A: CSA and UL certifications are common across Eaton and most substitute parts. Littelfuse variants add CE and KC certifications. SCHURTER and OptiFuse provide cULus certification. All parts maintain compliance with applicable regulatory standards for 750 mA, 250 V AC glass cartridge fuses.