COM-09772 Glass Cartridge Fuse 5A 125VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The COM-09772 is a fast-blow glass cartridge fuse rated at 5 amperes, 125 volts AC/DC, with a 5mm x 20mm form factor. This fuse requires a dedicated holder for installation and is designed for circuit protection in AC and DC applications. The part is currently active in production and maintains full stock availability. Substitute parts are identified when equivalent electrical and mechanical parameters are met, enabling direct replacement in applications where the original part number becomes unavailable or when alternative sourcing is required.

Key Parameters

Parameter	Value
Current Rating	5 A
Voltage Rating (AC)	125 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Breaking Capacity @ Rated Voltage	10 kA
Mounting Type	Requires Holder
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the COM-09772 are qualified based on strict equivalence of the following critical parameters:

Electrical Parameters:

Current Rating: 5 A (exact match required)
Voltage Rating (AC): 125 V (exact match required)
Response Time: Fast Blow (exact match required)
Breaking Capacity @ Rated Voltage: 10 kA (exact match required)

Mechanical Parameters:

Fuse Type: Cartridge, Glass (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)

Compliance Parameters:

RoHS Status: ROHS3 Compliant (minimum requirement)

The substitute parts 0235005.HXP and 0235005.MXP, both manufactured by Littelfuse Inc., meet all critical electrical and mechanical parameters. Both parts are classified as parametric equivalents and are suitable for direct replacement in the COM-09772 application.

Parameter Comparison

Parameter	COM-09772 (SparkFun)	0235005.HXP (Littelfuse)	0235005.MXP (Littelfuse)
Current Rating (Amps)	5 A	5 A	5 A
Voltage Rating - AC	125 V	125 V	125 V
Fuse Type	Cartridge, Glass	Cartridge, Glass	Cartridge, Glass
Response Time	Fast Blow	Fast Blow	Fast Blow
Package / Case	5mm x 20mm	5mm x 20mm	5mm x 20mm
Size / Dimension	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)	0.205" Dia x 0.787" L (5.20mm x 20.00mm)
Breaking Capacity @ Rated Voltage	10 kA	10 kA	10 kA
Mounting Type	Requires Holder	Requires Holder	Requires Holder
DC Cold Resistance (Ohms)	0.021	0.0184	0.0184
Melting I²t	29	27.41	27.41
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Approval Agency	CCC, CSA, UL	CE, CSA, KC, PSE, UL	CE, CSA, KC, PSE, UL

Engineering Selection Recommendations

Both Littelfuse substitute parts (0235005.HXP and 0235005.MXP) are direct parametric equivalents to the COM-09772. Selection between these options is based on availability and sourcing requirements:

0235005.HXP: 20,006 units in stock. Littelfuse Series 235 fuse with certifications including CE, CSA, KC, PSE, and UL. Operating temperature range: -55°C to 125°C. REACH Unaffected status.

0235005.MXP: 3,306 units in stock. Littelfuse Series 235 fuse with identical electrical specifications and certifications as 0235005.HXP. Operating temperature range: -55°C to 125°C. REACH Unaffected status.

Both substitute parts carry expanded regulatory approvals (CE, KC, PSE) beyond the original COM-09772 specification, providing broader compliance coverage. The DC cold resistance and melting I²t values of the Littelfuse parts are within acceptable engineering tolerances for fast-blow glass cartridge fuses of this rating class.

Frequently Asked Questions (FAQ)

Q: Can 0235005.HXP or 0235005.MXP be used as direct replacements for COM-09772?

A: Yes. Both Littelfuse parts meet all critical electrical parameters (5 A, 125 V AC, fast-blow response, 10 kA breaking capacity) and mechanical specifications (5mm x 20mm cartridge form factor, requires holder). They are classified as parametric equivalents.

Q: What is the difference between 0235005.HXP and 0235005.MXP?

A: Both parts are electrically and mechanically identical. The difference is in inventory availability. 0235005.HXP has 20,006 units in stock, while 0235005.MXP has 3,306 units in stock. Selection should be based on sourcing and lead time requirements.

Q: Are there differences in DC cold resistance between the main part and substitutes?

A: The COM-09772 has a DC cold resistance of 0.021 ohms, while both Littelfuse substitutes measure 0.0184 ohms. This difference is within acceptable tolerance for fast-blow glass cartridge fuses and does not affect circuit protection performance at the specified 5 A rating.

Q: Do the substitute parts require the same holder as COM-09772?

A: Yes. All three parts use the 5mm x 20mm cartridge form factor and require a compatible fuse holder. No mechanical modifications or adapter components are necessary.

Q: What certifications do the substitute parts carry?

A: Both 0235005.HXP and 0235005.MXP carry CE, CSA, KC, PSE, and UL certifications. The original COM-09772 carries CCC, CSA, and UL certifications. The Littelfuse parts provide expanded regulatory coverage.

Q: Are the substitute parts RoHS compliant?

A: Yes. Both 0235005.HXP and 0235005.MXP are ROHS3 Compliant, matching the compliance status of COM-09772.

Q: What is the operating temperature range for the substitute parts?

A: Both Littelfuse substitutes operate across -55°C to 125°C. The COM-09772 does not specify an operating temperature range in the provided data.

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