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Littelfuse 0253.062M Board Mount Fuse Equivalent & Substitute Parts
Part Overview
The Littelfuse 0253.062M is a 62 mA, 125 V AC/DC board mount fuse in the PICO® II 253 series, designed for through-hole axial mounting applications. This fast-blow fuse provides circuit protection in compact form factor with a breaking capacity of 50 A AC and 300 A DC. The part is currently active in production with full CSA, QPL, and UR approvals. Substitute parts are identified when identical electrical and mechanical specifications are required for design flexibility, inventory management, or supply chain continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Current Rating | 62 mA |
| Voltage Rating (AC) | 125 V |
| Voltage Rating (DC) | 125 V |
| Response Time | Fast Blow |
| Mounting Type | Through Hole |
| Package / Case | Axial |
| Breaking Capacity @ Rated Voltage | 50 A AC, 300 A DC |
| Operating Temperature Range | -55°C to 125°C |
| Size / Dimension | 0.103" Dia × 0.280" L (2.61 mm × 7.11 mm) |
| DC Cold Resistance | 7 Ohms |
| Melting I²t | 0.000113 |
| Approval Agencies | CSA, QPL, UR |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
The Littelfuse 0253.062V is identified as a parametric equivalent to the 0253.062M. Substitution is valid based on the following criteria:
- Identical current rating: 62 mA
- Identical voltage ratings: 125 V AC and 125 V DC
- Identical response time classification: Fast Blow
- Identical mounting configuration: Through Hole Axial
- Identical breaking capacity: 50 A AC, 300 A DC
- Identical physical dimensions: 0.103" Dia × 0.280" L
- Identical DC cold resistance: 7 Ohms
- Identical melting I²t value: 0.000113
- Identical operating temperature range: -55°C to 125°C
- Identical regulatory approvals: CSA, QPL, UR
- Identical RoHS compliance: ROHS3 Compliant
Both parts belong to the PICO® II 253 series and maintain full electrical and mechanical interchangeability.
Parameter Comparison
| Parameter | 0253.062M | 0253.062V | Match |
|---|---|---|---|
| Manufacturer | Littelfuse Inc. | Littelfuse Inc. | ✓ |
| Series | PICO® II 253 | PICO® II 253 | ✓ |
| Current Rating (Amps) | 62 mA | 62 mA | ✓ |
| Voltage Rating - AC | 125 V | 125 V | ✓ |
| Voltage Rating - DC | 125 V | 125 V | ✓ |
| Response Time | Fast Blow | Fast Blow | ✓ |
| Mounting Type | Through Hole | Through Hole | ✓ |
| Fuse Type | Board Mount (Cartridge Style Excluded) | Board Mount (Cartridge Style Excluded) | ✓ |
| Package / Case | Axial | Axial | ✓ |
| Breaking Capacity @ Rated Voltage | 50 A AC, 300 A DC | 50 A AC, 300 A DC | ✓ |
| Melting I²t | 0.000113 | 0.000113 | ✓ |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C | ✓ |
| Size / Dimension | 0.103" Dia × 0.280" L (2.61 mm × 7.11 mm) | 0.103" Dia × 0.280" L (2.61 mm × 7.11 mm) | ✓ |
| DC Cold Resistance | 7 Ohms | 7 Ohms | ✓ |
| Approval Agency | CSA, QPL, UR | CSA, QPL, UR | ✓ |
| RoHS Status | ROHS3 Compliant | ROHS3 Compliant | ✓ |
| Product Status | Active | Active | ✓ |
Engineering Selection Recommendations
Both the 0253.062M and 0253.062V are active production parts with identical electrical specifications, mechanical dimensions, and regulatory certifications. Selection between these parts may be based on inventory availability or supply chain requirements. The 0253.062V currently maintains higher stock levels (1139 pcs vs. 815 pcs). Both parts carry full CSA, QPL, and UR approvals, ensuring compliance with applicable standards. ROHS3 compliance is maintained across both variants. No technical performance differentiation exists between these parts.
Frequently Asked Questions (FAQ)
Q: Can the 0253.062V be used as a direct replacement for the 0253.062M?
A: Yes. Both parts are electrically and mechanically identical with matching current ratings (62 mA), voltage ratings (125 V AC/DC), response time (Fast Blow), physical dimensions (0.103" Dia × 0.280" L), and regulatory approvals (CSA, QPL, UR).
Q: Are there any differences in breaking capacity between these parts?
A: No. Both parts have identical breaking capacity ratings of 50 A AC and 300 A DC at rated voltage.
Q: Do both parts meet the same compliance standards?
A: Yes. Both the 0253.062M and 0253.062V are ROHS3 compliant and carry CSA, QPL, and UR approvals.
Q: What is the operating temperature range for these fuses?
A: Both parts operate across the range of -55°C to 125°C.
Q: Are the physical dimensions identical?
A: Yes. Both parts share identical axial dimensions of 0.103" diameter and 0.280" length (2.61 mm × 7.11 mm).
Q: What is the DC cold resistance specification?
A: Both parts have a DC cold resistance of 7 Ohms.
Q: Can these parts be used interchangeably in PCB designs?
A: Yes. Identical through-hole axial mounting configuration and physical dimensions ensure direct PCB footprint compatibility.
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