Equivalent & Substitute Parts for 0680L1500-21

Part Overview

The 0680L1500-21 is a 1.5 A surface mount board mount fuse rated for 125 V AC/DC operation. Manufactured by Bel Fuse Inc., this component is designed for SMD applications requiring slow blow response characteristics in a 2-SMD square end block package. The part is active in production and widely used in industrial and commercial electronic assemblies. Substitute parts may be required due to inventory availability, supply chain considerations, or specific application requirements while maintaining electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Current Rating	1.5 A
Voltage Rating (AC)	125 V
Voltage Rating (DC)	125 V
Response Time	Slow Blow
Mounting Type	Surface Mount
Package / Case	2-SMD, Square End Block
Size / Dimension	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)
Operating Temperature Range	-55°C ~ 125°C
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 0680L1500-21 is determined by strict equivalence across the following critical parameters:

Current Rating: 1.5 A (exact match required)
Voltage Rating: 125 V AC and 125 V DC (exact match required)
Response Time: Slow Blow (exact match required)
Mounting Type: Surface Mount (exact match required)
Package / Case: 2-SMD, Square End Block (exact match required)
Physical Dimensions: 0.240" L x 0.100" W x 0.100" H (exact match required)
Operating Temperature Range: -55°C ~ 125°C (exact match required)

All substitute parts listed below meet these criteria. Variations in breaking capacity, melting I²t, DC cold resistance, and approval agency certifications do not preclude substitution but may influence selection based on specific application requirements.

Parameter Comparison

Parameter	0680L1500-21	0680L1500-01	0680L1500-05	0680H1500-05
Manufacturer	Bel Fuse Inc.	Bel Fuse	Bel Fuse	Bel Fuse Inc.
Current Rating (Amps)	1.5 A	1.5 A	1.5 A	1.5 A
Voltage Rating - AC	125 V	125 V	125 V	125 V
Voltage Rating - DC	125 V	125 V	125 V	125 V
Response Time	Slow Blow	Slow Blow	Slow Blow	Slow Blow
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block	2-SMD, Square End Block
Size / Dimension	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)	0.240" L x 0.100" W x 0.100" H (6.10mm x 2.54mm x 2.54mm)
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Breaking Capacity @ Rated Voltage	50A AC, 100A DC	50A AC, 100A DC	50A AC, 100A DC	100A AC, 500A DC
Melting I²t	3.3	3.3	3.3	1.7
DC Cold Resistance	0.095 Ohms	0.095 Ohms	0.095 Ohms	0.175 Ohms
Approval Agency	AEC-Q200, CE, cURus	AEC-Q200, CE, cURus	AEC-Q200, CE, cURus	cURus
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active	Active
Inventory (Pcs)	700	2338	42143	5637

Engineering Selection Recommendations

All listed substitute parts maintain full electrical and mechanical compatibility with the 0680L1500-21 across core functional parameters. Selection among equivalent parts should be based on the following factors:

The 0680L1500-01 and 0680L1500-05 are direct parametric equivalents to the 0680L1500-21, sharing identical current rating, voltage rating, response time, package configuration, and approval certifications (AEC-Q200, CE, cURus). These parts are suitable for applications requiring automotive-grade qualification or enhanced environmental compliance.

The 0680H1500-05 differs in series designation and offers enhanced breaking capacity (100A AC, 500A DC versus 50A AC, 100A DC) and lower melting I²t (1.7 versus 3.3). This part carries cURus certification only and exhibits higher DC cold resistance (0.175 Ohms versus 0.095 Ohms). The 0680H1500-05 is appropriate for applications where higher fault current interruption capability is required, provided that the higher DC cold resistance does not adversely affect circuit performance.

All parts are ROHS3 compliant, carry MSL 1 rating, and operate across the identical temperature range (-55°C ~ 125°C).

Frequently Asked Questions (FAQ)

Q: Can 0680L1500-01 or 0680L1500-05 be used interchangeably with 0680L1500-21?

A: Yes. These parts are parametric equivalents sharing identical current rating (1.5 A), voltage rating (125 V AC/DC), response time (Slow Blow), package configuration (2-SMD, Square End Block), physical dimensions, and operating temperature range. All three carry AEC-Q200, CE, and cURus certifications.

Q: What is the difference between the 0680L and 0680H series?

A: The primary differences are breaking capacity and melting I²t. The 0680L series (0680L1500-21, 0680L1500-01, 0680L1500-05) provides 50A AC and 100A DC breaking capacity with melting I²t of 3.3. The 0680H series (0680H1500-05) provides 100A AC and 500A DC breaking capacity with melting I²t of 1.7. Both series maintain identical current rating, voltage rating, response time, and physical package.

Q: Is the 0680H1500-05 a suitable substitute for the 0680L1500-21?

A: The 0680H1500-05 is electrically and mechanically compatible for basic circuit protection functions. However, it differs in breaking capacity, melting I²t, DC cold resistance, and carries only cURus certification (lacking AEC-Q200 and CE). Selection should be based on specific application requirements regarding fault current handling and regulatory compliance.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed parts (0680L1500-21, 0680L1500-01, 0680L1500-05, and 0680H1500-05) are ROHS3 compliant with MSL 1 rating.

Q: What is the significance of DC cold resistance variation?

A: DC cold resistance affects voltage drop across the fuse during normal operation. The 0680L series exhibits 0.095 Ohms, while the 0680H1500-05 exhibits 0.175 Ohms. In applications with tight voltage tolerance requirements or high continuous current operation, the higher resistance of the 0680H series may introduce measurable voltage drop.

Q: Can these parts be used in automotive applications?

A: The 0680L1500-21, 0680L1500-01, and 0680L1500-05 carry AEC-Q200 certification, qualifying them for automotive use. The 0680H1500-05 does not carry AEC-Q200 certification and is not qualified for automotive applications.

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