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Littelfuse 0251007.MAT1JL PICO® II 251 Board Mount Fuse 7A 125VAC/VDC Axial
Part Overview
The Littelfuse 0251007.MAT1JL is a through-hole axial board mount fuse rated for 7 amperes at 125 volts AC/DC. This component belongs to the PICO® II 251 series and is designed for fast-blow protection in electronic circuits. The part is currently active in production and widely available. Alternative packaging and tape configurations of this fuse are available to accommodate different procurement, assembly, and inventory requirements across manufacturing environments.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse Inc. |
| Series | PICO® II 251 |
| Current Rating | 7 A |
| Voltage Rating (AC) | 125 V |
| Voltage Rating (DC) | 125 V |
| Response Time | Fast Blow |
| Mounting Type | Through Hole |
| Package / Case | Axial |
| Size / Dimension | 0.110" Dia x 0.280" L (2.80mm x 7.11mm) |
| Operating Temperature Range | -55°C ~ 125°C |
| Approval Agencies | CSA, cURus, TUV |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the 0251007.MAT1JL is determined by electrical and mechanical parameter equivalence within the PICO® II 251 series. The substitute parts maintain identical specifications across the following critical parameters:
- Current Rating: 7 A
- Voltage Rating: 125 V AC / 125 V DC
- Response Time: Fast Blow
- Mounting Type: Through Hole
- Package / Case: Axial
- Physical Dimensions: 0.110" Dia x 0.280" L (2.80mm x 7.11mm)
- Operating Temperature Range: -55°C ~ 125°C
- Regulatory Approvals: CSA, cURus, TUV
- RoHS Compliance: ROHS3 Compliant
The primary difference among substitute parts is packaging configuration (Tape & Box versus Cut Tape), which affects procurement and assembly logistics but does not alter electrical or mechanical performance. Breaking capacity specifications vary between the main part (70A AC, 300A DC) and certain substitutes (50A AC, 300A DC), representing a secondary distinction in fault current handling capability.
Parameter Comparison
| Parameter | 0251007.MAT1JL (Main) | 0251007.HAT1L | 0251007.MAT1L | 0251007.PAT1L |
|---|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. | Littelfuse Inc. |
| Series | PICO® II 251 | PICO® II 251 | PICO® II 251 | PICO® II 251 |
| Packaging | Tape & Box (TB) | Cut Tape (CT) | Cut Tape (CT) | Tape & Box (TB) |
| Current Rating (Amps) | 7 A | 7 A | 7 A | 7 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 | Fast Blow | Fast Blow | Fast Blow | Fast Blow |
| Mounting Type | Through Hole | Through Hole | Through Hole | Through Hole |
| Package / Case | Axial | Axial | Axial | Axial |
| Size / Dimension | 0.110" Dia x 0.280" L (2.80mm x 7.11mm) | 0.110" Dia x 0.280" L (2.80mm x 7.11mm) | 0.110" Dia x 0.280" L (2.80mm x 7.11mm) | 0.110" Dia x 0.280" L (2.80mm x 7.11mm) |
| Breaking Capacity @ Rated Voltage | 70A AC, 300A DC | 50A AC, 300A DC | 50A AC, 300A DC | 50A AC, 300A DC |
| Melting I²t | 10.4 | 10.4 | 10.4 | 10.4 |
| DC Cold Resistance | 0.0107 Ohms | 0.0107 Ohms | 0.0107 Ohms | 0.0107 Ohms |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C | -55°C ~ 125°C |
| Approval Agency | CSA, cURus, TUV | CSA, cURus, TUV | CSA, cURus, TUV | CSA, cURus, TUV |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant | ROHS3 Compliant |
| Product Status | Active | Active | Active | Active |
Engineering Selection Recommendations
All substitute parts maintain full electrical and mechanical compatibility with the 0251007.MAT1JL within the specified operating parameters. Selection among these alternatives should be based on packaging requirements and procurement logistics:
0251007.MAT1JL and 0251007.PAT1L are supplied in Tape & Box (TB) packaging, suitable for standard reel-based automated assembly processes and bulk inventory management.
0251007.HAT1L and 0251007.MAT1L are supplied in Cut Tape (CT) packaging, appropriate for smaller quantity orders, manual assembly operations, or applications requiring individual component handling.
All parts carry identical regulatory approvals (CSA, cURus, TUV) and RoHS3 compliance certification, ensuring equivalence for applications subject to these standards. The breaking capacity difference (70A AC versus 50A AC) between the main part and certain substitutes should be evaluated against specific circuit fault current requirements; however, all parts maintain 300A DC breaking capacity.
Frequently Asked Questions (FAQ)
Q: Can 0251007.HAT1L, 0251007.MAT1L, and 0251007.PAT1L be used interchangeably with 0251007.MAT1JL?
A: Yes, these parts are electrically and mechanically equivalent. All maintain identical current ratings (7 A), voltage ratings (125 V AC/DC), response time (Fast Blow), physical dimensions, and regulatory approvals. Substitution is valid from an engineering standpoint.
Q: What is the difference between Tape & Box (TB) and Cut Tape (CT) packaging?
A: Tape & Box packaging supplies components on continuous tape with a protective box, suitable for high-volume automated assembly. Cut Tape packaging provides components on tape segments without the box, typically used for lower-volume orders or manual assembly. Both formats contain identical components.
Q: Does the breaking capacity difference affect substitution eligibility?
A: The main part (0251007.MAT1JL) specifies 70A AC breaking capacity, while substitutes specify 50A AC. Both maintain 300A DC breaking capacity. Selection should account for the maximum fault current in the application circuit. If fault current exceeds 50A AC, the main part is required.
Q: Are all substitute parts RoHS and regulatory compliant?
A: Yes. All parts listed are ROHS3 compliant and carry identical regulatory approvals from CSA, cURus, and TUV.
Q: Which part should I select for automated assembly?
A: For automated pick-and-place assembly, select either 0251007.MAT1JL or 0251007.PAT1L (both Tape & Box packaging). For manual assembly or lower-volume applications, 0251007.HAT1L or 0251007.MAT1L (Cut Tape packaging) are appropriate.
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