Littelfuse 0273.750H Equivalent & Substitute Parts

Part Overview

The Littelfuse 0273.750H is a 750 mA, 125 V AC/DC board mount fuse in the MICRO™ 273 series. This fast-blow fuse is designed for through-hole radial mounting in vertical orientation and is actively produced. Equivalent substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications requiring identical electrical and mechanical specifications.

Substiute Parts

0273.750H

Littelfuse Inc.In Stock: 7110273.750H Datasheet

Current PartRFQ

0273.750V

Littelfuse Inc.In Stock: 9050273.750V Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0273.750V is classified as a parametric equivalent to the 0273.750H. Substitution is valid based on identical alignment across all critical electrical and mechanical parameters:

• Current Rating: 750 mA (identical)
• Voltage Rating: 125 V AC / 125 V DC (identical)
• Response Time: Fast Blow (identical)
• Mounting Configuration: Through Hole, Radial, Can, Vertical (identical)
• Breaking Capacity: 10 kA @ Rated Voltage (identical)
• Thermal Characteristics: Melting I²t 0.09, Operating Temperature -55°C to 85°C (identical)
• Physical Dimensions: 0.250" Dia x 0.350" H (identical)
• DC Cold Resistance: 0.293 Ohms (identical)
• Regulatory Compliance: ROHS3, CSA, QPL, UL (identical)

Both parts belong to the MICRO™ 273 series and maintain active product status with full manufacturing support.

Parameter Comparison

Engineering Selection Recommendations

Both the 0273.750H and 0273.750V are active products manufactured by Littelfuse Inc. with identical electrical specifications, mechanical dimensions, and regulatory certifications. Selection between these parts may be based on inventory availability, lead time, or procurement source preference. Both parts carry CSA, QPL, and UL approvals, confirming compliance with industry standards for board mount fuses. ROHS3 compliance is maintained across both variants, supporting environmental and regulatory requirements in end-use applications.

Frequently Asked Questions (FAQ)

Q: Can the 0273.750V be used as a direct replacement for the 0273.750H?

A: Yes. Both parts are parametric equivalents with identical current ratings (750 mA), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting configuration (Through Hole, Radial, Can, Vertical), breaking capacity (10 kA), thermal characteristics, physical dimensions, and regulatory certifications.

Q: Are there any differences in package or mounting between these parts?

A: No. Both parts use identical through-hole radial mounting in vertical orientation with the same physical dimensions of 0.250" Dia x 0.350" H (6.35 mm x 8.89 mm).

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 0273.750H and 0273.750V carry identical approvals from CSA, QPL, and UL, and both are ROHS3 compliant.

Q: What is the melting I²t value for these fuses?

A: The melting I²t for both parts is 0.09, indicating identical thermal response characteristics.

Q: Are there any temperature operating range differences?

A: No. Both parts operate across the identical temperature range of -55°C to 85°C.