Littelfuse 0272.250V Board Mount Fuse - Equivalent & Substitute Parts

Part Overview

The Littelfuse 0272.250V is a 250 mA, 125 V AC/DC board mount fuse in the MICRO™ 272 series. This fast-blow fuse is designed for through-hole radial mounting in vertical orientation and is actively produced. Equivalent parts are identified when identical electrical ratings, mechanical form factors, and regulatory certifications are maintained across the product line.

Substiute Parts

0272.250V

Littelfuse Inc.In Stock: 11960272.250V Datasheet

Current PartRFQ

0272.250H

Littelfuse Inc.In Stock: 9910272.250H Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0272.250H qualifies as a parametric equivalent to the 0272.250V based on the following criteria:

• Identical current rating: 250 mA
• Identical voltage ratings: 125 V AC and 125 V DC
• Identical response time classification: Fast Blow
• Identical mounting configuration: Through Hole, Radial, Can, Vertical
• Identical breaking capacity: 10 kA @ rated voltage
• Identical thermal characteristics: -55°C ~ 125°C operating range
• Identical physical dimensions: 0.235" Dia x 0.287" H (5.97 mm x 7.30 mm)
• Identical DC cold resistance: 1.75 Ohms
• Identical melting I²t value: 0.0064
• Identical regulatory certifications: CSA, QPL, UL
• Identical RoHS compliance: ROHS3 Compliant

Parameter Comparison

Engineering Selection Recommendations

Both the 0272.250V and 0272.250H are active products from Littelfuse Inc. with identical electrical specifications, mechanical form factors, and regulatory certifications. Selection between these parts may be based on inventory availability or procurement lead times, as they are functionally interchangeable within the MICRO™ 272 series. Both parts maintain CSA, QPL, and UL approvals and comply with ROHS3 requirements, ensuring compatibility with regulated applications.

Frequently Asked Questions (FAQ)

Q: Can the 0272.250H be used as a direct replacement for the 0272.250V?

A: Yes. The 0272.250H is a parametric equivalent with identical current rating (250 mA), voltage ratings (125 V AC/DC), response time (Fast Blow), mounting configuration (Through Hole, Radial, Can, Vertical), breaking capacity (10 kA), thermal range (-55°C ~ 125°C), physical dimensions (0.235" Dia x 0.287" H), and regulatory certifications (CSA, QPL, UL).

Q: Are there any differences in the mechanical package between these parts?

A: No. Both parts use identical radial, can, vertical mounting packages with the same physical dimensions of 0.235" Dia x 0.287" H (5.97 mm x 7.30 mm). They are mechanically interchangeable on PCBs designed for either part number.

Q: Do both parts meet the same regulatory requirements?

A: Yes. Both the 0272.250V and 0272.250H carry identical approvals from CSA, QPL, and UL, and both comply with ROHS3 standards. They are suitable for applications requiring these certifications.

Q: What is the melting I²t specification, and is it the same for both parts?

A: The melting I²t value is 0.0064 for both parts. This parameter defines the thermal energy required to melt the fuse element and is identical across both part numbers.

Q: Are there any temperature operating range differences?

A: No. Both parts operate across the identical temperature range of -55°C to 125°C, ensuring consistent performance in equivalent thermal environments.