Littelfuse 0251007.VXL Board Mount Fuse Equivalent & Substitute Parts

Part Overview

The Littelfuse 0251007.VXL is a 7 A, 125 V AC/DC board mount fuse in axial through-hole configuration, part of the PICO® II 251 series. This component is designed for circuit protection in applications requiring fast-blow response characteristics. The part maintains active product status with full regulatory compliance including CSA, cURus, and TUV approvals. Substitute parts are identified when inventory constraints, lead time requirements, or procurement preferences necessitate alternative sourcing while maintaining equivalent electrical and mechanical performance.

Substiute Parts

0251007.VXL

Littelfuse Inc.In Stock: 8360251007.VXL Datasheet

Current PartRFQ

0251007.MXL

Littelfuse Inc.In Stock: 24460251007.MXL Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The Littelfuse 0251007.MXL qualifies as a parametric equivalent to the 0251007.VXL based on the following substitution criteria:

Matching Electrical Parameters:

• Current Rating: 7 A (identical)
• Voltage Rating AC: 125 V (identical)
• Voltage Rating DC: 125 V (identical)
• Response Time: Fast Blow (identical)
• Melting I²t: 10.4 (identical)
• DC Cold Resistance: 0.0107 Ohms (identical)

Matching Mechanical Parameters:

• Mounting Type: Through Hole (identical)
• Package / Case: Axial (identical)
• Fuse Type: Board Mount (Cartridge Style Excluded) (identical)
• Size / Dimension: 0.110" Dia x 0.280" L (2.80mm x 7.11mm) (identical)
• Operating Temperature Range: -55°C ~ 125°C (identical)

Matching Compliance & Regulatory:

• Approval Agencies: CSA, cURus, TUV (identical)
• RoHS Status: ROHS3 Compliant (identical)
• REACH Status: REACH Unaffected (identical)
• ECCN: EAR99 (identical)
• HTSUS: 8536.10.0040 (identical)

Noted Difference:

• Breaking Capacity @ Rated Voltage: 0251007.VXL rated 70A AC / 300A DC; 0251007.MXL rated 50A AC / 300A DC

Both parts are manufactured by Littelfuse Inc. within the PICO® II 251 series and maintain active product status.

Parameter Comparison

Engineering Selection Recommendations

Both the 0251007.VXL and 0251007.MXL maintain active product status with identical regulatory certifications (CSA, cURus, TUV) and full ROHS3 compliance. Selection between these parts should be based on application-specific breaking capacity requirements. The 0251007.VXL provides 70A AC breaking capacity, while the 0251007.MXL provides 50A AC breaking capacity; both maintain 300A DC breaking capacity. All other electrical, mechanical, and thermal characteristics are equivalent. Both parts are suitable for through-hole board mount applications requiring 7 A protection at 125 V AC/DC with fast-blow response.

Frequently Asked Questions (FAQ)

Q: Can the 0251007.MXL be used as a direct replacement for the 0251007.VXL?

A: The 0251007.MXL is electrically and mechanically equivalent to the 0251007.VXL for all parameters except breaking capacity at rated voltage. The 0251007.MXL has a lower AC breaking capacity (50A vs. 70A). Substitution is valid only if the application does not require the higher 70A AC breaking capacity of the original part.

Q: Are the physical dimensions identical between these parts?

A: Yes. Both parts share identical dimensions of 0.110" diameter by 0.280" length (2.80mm x 7.11mm) and are configured for through-hole axial mounting on PCBs.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both the 0251007.VXL and 0251007.MXL carry identical approvals from CSA, cURus, and TUV, and both are ROHS3 compliant with REACH unaffected status.

Q: What is the significance of the melting I²t value?

A: The melting I²t of 10.4 is identical for both parts and defines the thermal energy required to melt the fuse element. This parameter is critical for coordinating fuse protection with circuit design and is equivalent between the two parts.

Q: Are there any temperature operating differences between these parts?

A: No. Both parts operate across the identical temperature range of -55°C to 125°C.

Q: What is the DC cold resistance specification used for?

A: DC cold resistance of 0.0107 Ohms is measured at room temperature with no current flowing and is used to calculate voltage drop and power dissipation in the circuit. This value is identical for both parts.