GDB-800MA Equivalent & Substitute Parts Reference

Part Overview

The GDB-800MA is an 800 mA, 250 V AC/DC fast-blow glass cartridge fuse in 5mm x 20mm package format manufactured by Eaton - Electronics Division. This component is classified as Active product status and requires a fuse holder for installation. Equivalent and substitute parts are identified based on matching electrical ratings, mechanical dimensions, response characteristics, and approval agency certifications. Alternative models are necessary to support supply chain flexibility, regional compliance requirements, and design optimization across different application environments.

Key Parameters

Parameter	Value
Current Rating	800 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	35A
Mounting Type	Requires Holder
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)

Substitute Part Grouping Explanation

Substitute parts for the GDB-800MA are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical current rating (800 mA) and voltage rating (250 V AC). Response time classification remains Fast Blow across all alternatives.

Mechanical Compatibility: All substitute parts conform to the 5mm x 20mm package format with identical physical dimensions (0.205" Dia x 0.787" L), ensuring direct mechanical interchangeability within standard fuse holders.

Functional Parameters: Breaking capacity at rated voltage (35A) is maintained across all qualified substitutes. Melting I²t values range from 0.508 to 0.85, representing acceptable thermal characteristics within the fast-blow fuse category.

Approval Agency Certifications: Substitute parts include certifications from recognized standards bodies including UL, VDE, CSA, BSI, CCC, and others. Selection should account for regional compliance requirements specific to the application.

Manufacturer Diversity: Qualified substitutes are sourced from Eaton - Electronics Division (GDB, GMA, S500 series) and Littelfuse Inc. (217 series), as well as SCHURTER Inc. (FSF 5x20 series).

Parameter Comparison

Part Number	Manufacturer	Series	Current Rating (mA)	Voltage (V AC)	Response Time	Package	Breaking Capacity (A)	Melting I²t	DC Cold Resistance (Ohms)	RoHS Status
GDB-800MA	Eaton	GDB	800	250	Fast Blow	5x20mm	35	0.67	0.14	Not Specified
BK/GDB-800MA	Eaton	GDB	800	250	Fast Blow	5x20mm	35	0.67	0.14	ROHS3 Compliant
BK/GMA-800-R	Eaton	GMA	800	250	Fast Blow	5x20mm	35	0.7	0.17	ROHS3 Compliant
BK/S500-800-R	Eaton	S500	800	250	Fast Blow	5x20mm	35	0.67	0.14	ROHS3 Compliant
BK1/S500-800-R	Eaton	S500	800	250	Fast Blow	5x20mm	35	0.67	0.14	RoHS Compliant
GMA-800-R	Eaton	GMA	800	250	Fast Blow	5x20mm	35	0.7	0.17	RoHS Compliant
S500-800-R	Eaton	S500	800	250	Fast Blow	5x20mm	35	0.67	0.14	ROHS3 Compliant
0034.1515	SCHURTER Inc.	FSF 5x20	800	250	Fast Blow	5x20mm	35	0.508	Not Specified	ROHS3 Compliant
0217.800HXP	Littelfuse Inc.	217	800	250	Fast Blow	5x20mm	35	0.85	0.1203	ROHS3 Compliant
0217.800MXP	Littelfuse Inc.	217	800	250	Fast Blow	5x20mm	35	0.85	0.1203	ROHS3 Compliant
0217.800TXP	Littelfuse Inc.	217	800	250	Fast Blow	5x20mm	35	0.85	0.1203	ROHS3 Compliant

Engineering Selection Recommendations

Eaton GDB Series (BK/GDB-800MA): Direct parametric equivalent with identical melting I²t (0.67) and DC cold resistance (0.14 Ohms). ROHS3 compliant. Approval agencies: UL, VDE. Inventory: 1154 units. Recommended for applications requiring exact thermal matching to original GDB-800MA specification.

Eaton GMA Series (BK/GMA-800-R, GMA-800-R): Parametric equivalent with slightly elevated melting I²t (0.7) and DC cold resistance (0.17 Ohms). Approval agencies: CSA, PSE, UL. Inventory: 919-1007 units. Suitable for applications where minor thermal characteristic variation is acceptable and CSA/PSE certifications are required.

Eaton S500 Series (BK/S500-800-R, BK1/S500-800-R, S500-800-R): Parametric equivalent with melting I²t (0.67) and DC cold resistance (0.14 Ohms) matching GDB-800MA. Approval agencies include BSI, CCC, CSA, cULus, IMQ, SEMKO, VDE. Inventory: 707-959 units. Recommended for international applications requiring broad certification coverage.

SCHURTER FSF 5x20 (0034.1515): Parametric equivalent with lower melting I²t (0.508), indicating faster thermal response. Operating temperature range: -55°C ~ 125°C. Approval agencies: CCC, cURus, VDE. Inventory: 1844 units. Suitable for applications requiring extended temperature performance and faster thermal response characteristics.

Littelfuse 217 Series (0217.800HXP, 0217.800MXP, 0217.800TXP): Parametric equivalent with elevated melting I²t (0.85) and lower DC cold resistance (0.1203 Ohms). Operating temperature range: -55°C ~ 125°C. Approval agencies: CCC, CE, CSA, K-MARK, SEMKO, UL, VDE. Inventory: 908-1989 units. Recommended for applications requiring extended temperature performance and comprehensive international certifications.

Frequently Asked Questions (FAQ)

Q: Can BK/GDB-800MA be used as a direct replacement for GDB-800MA?

A: Yes. BK/GDB-800MA is a parametric equivalent with identical electrical ratings (800 mA, 250 V AC), response time (Fast Blow), mechanical dimensions (5x20mm), breaking capacity (35A), melting I²t (0.67), and DC cold resistance (0.14 Ohms). The primary difference is ROHS3 compliance certification on the substitute part.

Q: What is the significance of melting I²t variation across substitute parts?

A: Melting I²t represents the thermal energy required to melt the fuse element. GDB-800MA specifies 0.67. Littelfuse 217 series parts specify 0.85, indicating slightly higher thermal energy requirement. SCHURTER 0034.1515 specifies 0.508, indicating lower thermal energy requirement. These variations affect the precise thermal response curve but remain within the Fast Blow classification. Application-specific thermal analysis determines acceptability.

Q: Are all substitute parts mechanically interchangeable?

A: Yes. All substitute parts conform to 5mm x 20mm package dimensions (0.205" Dia x 0.787" L) and require standard fuse holders. No mechanical modification is required for installation.

Q: Which substitute part offers the broadest international certification coverage?

A: BK/S500-800-R and S500-800-R offer certifications from BSI, CCC, CSA, cULus, IMQ, SEMKO, and VDE. Littelfuse 217 series parts (0217.800HXP, 0217.800MXP, 0217.800TXP) offer certifications from CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE. Selection depends on specific regional compliance requirements.

Q: What is the difference between 0217.800HXP, 0217.800MXP, and 0217.800TXP?

A: All three Littelfuse 217 series parts share identical electrical parameters (800 mA, 250 V AC, Fast Blow, 5x20mm, 35A breaking capacity, 0.85 melting I²t, 0.1203 Ohms DC cold resistance) and operating temperature range (-55°C ~ 125°C). Differences exist in approval agency certifications and specific application designations. Consult Littelfuse technical documentation for application-specific guidance.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range is provided for SCHURTER 0034.1515 (-55°C ~ 125°C) and Littelfuse 217 series (-55°C ~ 125°C). GDB-800MA does not specify operating temperature range. For applications requiring extended temperature performance, SCHURTER or Littelfuse alternatives are recommended. For standard temperature applications, all parts are suitable.

Q: Can Littelfuse 217 series parts be used in place of Eaton parts?

A: Yes, provided application-specific requirements accommodate the elevated melting I²t (0.85 versus 0.67) and lower DC cold resistance (0.1203 versus 0.14 Ohms). Electrical ratings, mechanical dimensions, response time, and breaking capacity are identical. Approval agency certifications differ; verify regional compliance requirements.

Q: What inventory levels are available for each substitute part?

A: BK/GDB-800MA: 1154 units. BK/GMA-800-R: 919 units. BK/S500-800-R: 959 units. BK1/S500-800-R: 707 units. GMA-800-R: 1007 units. S500-800-R: 743 units. SCHURTER 0034.1515: 1844 units. Littelfuse 0217.800HXP: 1067 units. Littelfuse 0217.800MXP: 1989 units. Littelfuse 0217.800TXP: 908 units.

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