COM-10166 Glass Cartridge Fuse 500mA 250VAC 5x20mm Equivalent & Substitute Parts

Part Overview

The COM-10166 is a fast-blow glass cartridge fuse rated at 500 mA, 250 V AC/DC with a 5mm x 20mm form factor manufactured by SparkFun Electronics. This fuse requires a dedicated holder for installation and is designed for circuit protection in electronic equipment operating across a wide temperature range of -55°C to 125°C. The part maintains active product status with 844 units in current inventory. Equivalent and substitute parts are necessary when the primary part is unavailable, when sourcing from alternative manufacturers is required for supply chain optimization, or when specific certification requirements must be met for particular applications.

Key Parameters

Parameter	Value
Current Rating	500 mA
Voltage Rating (AC)	250 V
Fuse Type	Cartridge, Glass
Response Time	Fast Blow
Package / Case	5mm x 20mm
Mounting Type	Requires Holder
Breaking Capacity @ Rated Voltage	35A
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the COM-10166 is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

Current Rating: 500 mA (exact match required)
Voltage Rating (AC): 250 V (exact match required)
Fuse Type: Cartridge, Glass (exact match required)
Response Time: Fast Blow (exact match required)
Package / Case: 5mm x 20mm (exact match required)
Mounting Type: Requires Holder (exact match required)
Breaking Capacity @ Rated Voltage: 35A (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these mandatory parameters without exception. Substitution is based solely on electrical and mechanical compatibility, not on performance optimization or feature enhancement. The substitute parts are sourced from manufacturers including Littelfuse Inc., SCHURTER Inc., and OptiFuse, each maintaining active product status and ROHS3 compliance.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Current Rating (Amps)	Voltage Rating - AC	Response Time	Package / Case	Breaking Capacity @ Rated Voltage	Operating Temperature	RoHS Status	Inventory (Pcs)
COM-10166	SparkFun Electronics	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	844
0034.1513	SCHURTER Inc.	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	6101
0217.500HXP	Littelfuse Inc.	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	2683
0217.500MXP	Littelfuse Inc.	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	3196
0217.500TXP	Littelfuse Inc.	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	711
0235.500HXP	Littelfuse Inc.	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	2111
0235.500MXP	Littelfuse	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	1275
FSD-500MA	OptiFuse	500 mA	250 V	Fast Blow	5mm x 20mm	35A	-55°C ~ 125°C	ROHS3 Compliant	2820

Engineering Selection Recommendations

All listed substitute parts are direct functional equivalents to COM-10166 based on electrical and mechanical parameters. Selection among these alternatives should be based on the following factors:

Certification Coverage: The COM-10166 carries approvals from CCC, CE, CSA, KC, SEMKO, UR, and VDE. Substitute parts maintain varying certification profiles. The 0217.500HXP, 0217.500MXP, and 0217.500TXP from Littelfuse carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications. The 0034.1513 from SCHURTER carries CCC, cURus, and VDE certifications. The FSD-500MA from OptiFuse carries cURus and IEC 60127 certifications. Selection should align with the specific regulatory requirements of the target application.

Inventory Availability: The 0034.1513 offers the highest inventory level at 6101 units. The 0217.500MXP provides 3196 units, and FSD-500MA provides 2820 units. These alternatives support extended lead time mitigation.

Product Status: All substitute parts maintain active product status, ensuring continued availability and manufacturer support.

RoHS Compliance: All substitute parts are ROHS3 compliant, matching the environmental compliance profile of the primary part.

Frequently Asked Questions (FAQ)

Q: Can I substitute COM-10166 with any of the listed parts without circuit modification?

A: Yes. All listed substitute parts meet identical electrical and mechanical specifications: 500 mA current rating, 250 V AC voltage rating, fast-blow response time, 5mm x 20mm package, 35A breaking capacity, and -55°C to 125°C operating temperature range. No circuit modification is required for direct substitution.

Q: What is the difference between the Littelfuse 217 series variants (0217.500HXP, 0217.500MXP, 0217.500TXP)?

A: These three part numbers are all from the Littelfuse 217 series and share identical electrical and mechanical parameters. The suffix designations (HXP, MXP, TXP) indicate internal construction or packaging variations that do not affect functional equivalence. All three are direct substitutes for COM-10166.

Q: Does the SCHURTER 0034.1513 have different certifications than the Littelfuse alternatives?

A: Yes. The 0034.1513 carries CCC, cURus, and VDE certifications, while Littelfuse 217 series parts carry CCC, CE, CSA, K-MARK, SEMKO, UL, and VDE certifications. Selection should be based on which certifications are required for your specific application region and regulatory framework.

Q: Is the OptiFuse FSD-500MA suitable for all applications where COM-10166 is used?

A: The FSD-500MA meets all mandatory electrical and mechanical parameters for direct substitution. However, it carries cURus and IEC 60127 certifications rather than the broader certification set of COM-10166. Verify that these certifications satisfy your application requirements before selection.

Q: What is the significance of the 5mm x 20mm package specification?

A: The 5mm x 20mm dimension is the physical form factor of the cartridge fuse. This specification ensures mechanical compatibility with standard fuse holders designed for this size. All substitute parts maintain this identical package dimension, guaranteeing physical interchangeability in existing fuse holder installations.

Q: Can I use these substitute parts in high-temperature applications?

A: Yes. All substitute parts, including COM-10166, are rated for operation across the -55°C to 125°C temperature range. This operating temperature specification applies to all listed alternatives without exception.

Q: Are there any differences in melting I²t values among the substitute parts?

A: Melting I²t values vary among the substitute parts (ranging from 0.06915 to 0.219), but these variations do not affect substitution eligibility. The I²t parameter describes thermal characteristics but does not change the fundamental electrical or mechanical compatibility. All parts maintain the same 500 mA current rating and fast-blow response time classification.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message