BK/GDA-100MA Ceramic Fuse 100mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The BK/GDA-100MA is a ceramic cartridge fuse rated at 100 mA, 250 V AC/DC with fast-blow response characteristics. Manufactured by Eaton Electronics Division, this component is designed for applications requiring overcurrent protection in 5mm x 20mm form factor with holder mounting. The part maintains active product status with 708 units in current inventory.

Equivalent and substitute parts are identified based on matching electrical specifications, mechanical dimensions, and functional performance parameters. Alternative sources and series variants are available from both Eaton and Littelfuse manufacturers, providing flexibility for procurement, supply chain continuity, and application-specific requirements.

Key Parameters

Parameter	Value
Current Rating	100 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Ceramic
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	1.5 kA
Mounting Type	Requires Holder
DC Cold Resistance	20 Ohms (Eaton); 5.7925 Ohms (Littelfuse)
Melting I²t	0.0018 (Eaton); 0.0045 (Littelfuse)

Substitute Part Grouping Explanation

Substitution relationships are established based on strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Current Rating: 100 mA (exact match required)
Voltage Rating: 250 V AC (exact match required)
Package Dimensions: 5mm x 20mm (exact match required)
Fuse Type: Cartridge, Ceramic (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity: 1.5 kA @ rated voltage (exact match required)

Eaton Series Equivalents (GDA and S501 Series): All Eaton-manufactured substitutes (BK/S501-100-R, BK1/S501-100-R, GDA-100MA, S501-100-R) meet identical electrical and mechanical specifications. These parts are interchangeable within the same manufacturer ecosystem and differ only in series designation and approval agency certifications.

Littelfuse Series Equivalents (216 Series): Littelfuse 0216.100HXP, 0216.100TXP, and 0216.100MXP meet all core electrical and mechanical requirements. These parts operate across extended temperature range (-55°C to 125°C) and carry broader international certifications (CCC, CE, CSA, SEMKO, UR, VDE). DC cold resistance and melting I²t values differ from Eaton variants but remain within acceptable substitution parameters for the 100 mA, 250 V ceramic cartridge fuse category.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Series	Current Rating (mA)	Voltage Rating (V AC)	Package	Breaking Capacity (kA)	Response Time	DC Cold Resistance (Ohms)	Melting I²t	Inventory (Pcs)	Product Status
BK/GDA-100MA	Eaton	GDA	100	250	5x20mm	1.5	Fast Blow	20	0.0018	708	Active
BK/S501-100-R	Eaton	S501	100	250	5x20mm	1.5	Fast Blow	20	0.0018	2004	Active
BK1/S501-100-R	Eaton	S501	100	250	5x20mm	1.5	Fast Blow	20	0.0018	1809	Active
GDA-100MA	Eaton	GDA	100	250	5x20mm	1.5	Fast Blow	20	0.0018	948	Active
S501-100-R	Eaton	S501	100	250	5x20mm	1.5	Fast Blow	20	0.0018	766	Active
0216.100HXP	Littelfuse	216	100	250	5x20mm	1.5	Fast Blow	5.7925	0.0045	1033	Active
0216.100TXP	Littelfuse	216	100	250	5x20mm	1.5	Fast Blow	5.7925	0.0045	931	Active
0216.100MXP	Littelfuse	216	100	250	5x20mm	1.5	Fast Blow	5.7925	0.0045	4444	Active

Engineering Selection Recommendations

Eaton GDA and S501 Series Selection: BK/S501-100-R, BK1/S501-100-R, GDA-100MA, and S501-100-R are direct functional equivalents to BK/GDA-100MA. All variants carry CSA and UL/cULus certifications. Selection among Eaton variants depends on certification requirements: GDA-100MA and S501-100-R carry UR certification; BK/S501-100-R and BK1/S501-100-R carry cULus certification. All Eaton parts maintain identical electrical performance with 20 Ohms DC cold resistance and 0.0018 melting I²t.

Littelfuse 216 Series Selection: 0216.100HXP, 0216.100TXP, and 0216.100MXP provide equivalent 100 mA, 250 V ceramic cartridge fuse functionality with extended operating temperature range (-55°C to 125°C). These parts carry broader international certifications (CCC, CE, CSA, SEMKO, UR, VDE) compared to Eaton variants. DC cold resistance is lower (5.7925 Ohms) and melting I²t is higher (0.0045) than Eaton equivalents. Littelfuse parts are suitable for applications requiring wider temperature operation and multi-regional compliance.

Procurement Considerations: BK/S501-100-R offers highest inventory availability (2004 units). 0216.100MXP provides largest stock (4444 units) among Littelfuse options. All parts maintain active product status with RoHS3 compliance and REACH unaffected status where applicable.

Frequently Asked Questions (FAQ)

Q: Can BK/GDA-100MA be directly replaced with BK/S501-100-R?

A: Yes. Both parts are manufactured by Eaton with identical electrical specifications (100 mA, 250 V AC, fast-blow response, 1.5 kA breaking capacity, 5x20mm package). The difference is series designation (GDA versus S501). Both require holder mounting and carry CSA certification. BK/S501-100-R carries cULus certification while BK/GDA-100MA carries UL certification.

Q: Are Littelfuse 0216 series fuses compatible with BK/GDA-100MA applications?

A: Littelfuse 0216.100HXP, 0216.100TXP, and 0216.100MXP are mechanically and electrically compatible. All match the 100 mA, 250 V, fast-blow, 1.5 kA, 5x20mm specifications. DC cold resistance differs (5.7925 Ohms versus 20 Ohms) and melting I²t differs (0.0045 versus 0.0018). Littelfuse variants operate across -55°C to 125°C temperature range versus unspecified Eaton range. Certification scope is broader (CCC, CE, CSA, SEMKO, UR, VDE).

Q: What is the difference between GDA-100MA and S501-100-R series?

A: Both are Eaton ceramic cartridge fuses with identical electrical and mechanical parameters. Series designation reflects internal product line organization. GDA-100MA carries CSA and UR certifications. S501-100-R carries CSA and cURus certifications. Selection depends on specific certification requirements for the application.

Q: Can I use 0216.100MXP instead of 0216.100HXP?

A: Yes. Both are Littelfuse 216 series ceramic cartridge fuses with identical electrical specifications (100 mA, 250 V, fast-blow, 1.5 kA, 5x20mm). Both carry CCC, CE, CSA, SEMKO, UR, VDE certifications. Both operate -55°C to 125°C. Inventory availability differs (0216.100MXP: 4444 units; 0216.100HXP: 1033 units).

Q: What does "Requires Holder" mean for mounting type?

A: All listed parts are cartridge fuses that require a separate fuse holder for installation. The 5x20mm cartridge dimensions are standardized; compatible holders accept this form factor. The fuse itself does not mount directly to circuit boards or panels.

Q: Are all substitute parts RoHS compliant?

A: Eaton GDA-100MA is RoHS Compliant. Eaton S501 series (BK/S501-100-R, BK1/S501-100-R, S501-100-R) are ROHS3 Compliant. Littelfuse 216 series (0216.100HXP, 0216.100TXP, 0216.100MXP) are ROHS3 Compliant. All parts meet RoHS requirements.

Q: What is the significance of different melting I²t values?

A: Melting I²t (0.0018 for Eaton; 0.0045 for Littelfuse) indicates the thermal energy required to melt the fuse element. Both values are provided as technical specifications. All parts maintain identical 100 mA current rating and fast-blow response time. The difference reflects internal fuse element design between manufacturers but does not affect functional substitution for 100 mA, 250 V applications.

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