0437.250WRAlternatives & Equivalent Parts
About 0437.250WR
0437.250WR is a Fuse component manufactured by LITTELFUSE. It comes in a Fuses Chip package. Below you'll find known alternative and equivalent parts that can serve as replacements in your design.
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Specification Comparison
| Parameter | 0437.250WRSource | LK112SM33TR | LK112SM50TR | 171856-0002 |
|---|---|---|---|---|
| Manufacturer | LITTELFUSE | STMicroelectronics | STMicroelectronics | Molex |
| Package Type | Fuses Chip | SOT23 (5-Pin) | SOT23 (5-Pin) | Header, Shrouded - Straight PTH Box |
| Pin Count | 2 | 5 | 5 | 2 |
| Temperature Range | -55.0°C ~ 150.0°C | — | — | — |
| Price | $0.4804 | $0.2760 | $0.3193 | $0.1070 |
| Stock | In Stock | In Stock | In Stock | In Stock |
| Lifecycle | ACTIVE | ACTIVE | ACTIVE | ACTIVE |
| Electrical Parameters | ||||
| YTEOL | 6.78 | 6.8 | 6.8 | — |
| Blow Characteristic | FAST | — | — | — |
| Body Breadth | 1.63 mm | — | — | — |
| Body Height | 0.835 mm | — | — | — |
| Body Length or Diameter | 3.2 mm | — | — | — |
| Circuit Protection Type | ELECTRIC FUSE | — | — | — |
| Fuse Size | 1206 | — | — | — |
| JESD-609 Code | e3 | e3 | e3 | — |
| Mounting Feature | SURFACE MOUNT | — | — | — |
| Packing Method | TR | TR | TR | — |
| Rated Breaking Capacity | 50 A | — | — | — |
| Rated Current | 0.25 A | — | — | — |
| Rated Voltage(AC) | 125 V | — | — | — |
| Rated Voltage(DC) | 125 V | — | — | — |
| Reference Standard | CSA; CUL; UL | — | — | — |
| Surface Mount | YES | YES | YES | — |
| Terminal Finish | Matte Tin (Sn) - with Nickel (Ni) barrier | Matte Tin (Sn) - annealed | Matte Tin (Sn) - annealed | — |
| Terminal Shape | WRAPAROUND | — | — | — |
| Trip Time or Delay | 5 s | — | — | — |
| Factory Lead Time | — | 12 Weeks | 12 Weeks | 20 Weeks |
| Adjustability | — | FIXED | FIXED | — |
| Dropout Voltage1-Max | — | 0.5 V | 0.5 V | — |
| Dropout Voltage1-Nom | — | 0.35 V | 0.35 V | — |
| Input Voltage Absolute-Max | — | 16 V | 16 V | — |
| Input Voltage-Max | — | 9.3 V | 11 V | — |
| Input Voltage-Min | — | 4.3 V | 6 V | — |
| JESD-30 Code | — | R-PDSO-G5 | R-PDSO-G5 | — |
| Line Regulation-Max | — | 0.04% | 0.02% | — |
| Load Regulation-Max | — | 0.09% | 0.09% | — |
| Number of Functions | — | 1 | 1 | — |
| Number of Outputs | — | 1 | 1 | — |
| Operating Temperature TJ-Max | — | 125 °C | 125 °C | — |
| Operating Temperature TJ-Min | — | -40 °C | -40 °C | — |
| Output Current1-Max | — | 0.2 A | 0.2 A | — |
| Output Voltage1-Max | — | 3.36 V | 5.1 V | — |
| Output Voltage1-Min | — | 3.24 V | 4.9 V | — |
| Output Voltage1-Nom | — | 3.3 V | 5 V | — |
| Package Body Material | — | PLASTIC/EPOXY | PLASTIC/EPOXY | — |
| Package Equivalence Code | — | TSOP5/6,.11,37 | TSOP5/6,.11,37 | — |
| Package Shape | — | RECTANGULAR | RECTANGULAR | — |
| Package Style | — | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH | — |
| Peak Reflow Temperature (Cel) | — | 260 | 260 | — |
| Qualification Status | — | Not Qualified | Not Qualified | — |
| Regulator Type | — | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | FIXED POSITIVE SINGLE OUTPUT LDO REGULATOR | — |
| Technology | — | BIPOLAR | BIPOLAR | — |
| Terminal Form | — | GULL WING | GULL WING | — |
| Terminal Pitch | — | 0.95 mm | 0.95 mm | — |
| Terminal Position | — | DUAL | DUAL | — |
| Time@Peak Reflow Temperature-Max (s) | — | 30 | 30 | — |
| Voltage Tolerance-Max | — | 1.8% | 2% | — |
| Reach Compliance Code | — | — | — | Unknown |
Cells highlighted in yellow indicate differing values across parts. Always verify with official datasheets before substitution.
Need pricing on these alternatives?
Get one quote covering all 3 alternatives for 0437.250WR — response within 24 hours.
Quick Links
Why Look for Alternatives?
Finding alternatives for 0437.250WR is essential for supply chain resilience. Component shortages, long lead times, and end-of-life notices can disrupt production schedules. Having verified alternative parts ensures your designs remain manufacturable.
When evaluating 0437.250WR replacements, consider key parameters such as package compatibility, electrical specifications, and operating temperature range. Our engineering team can help verify pin-to-pin compatibility for your specific application.
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FAQ
What is equivalent to 0437.250WR?
Known equivalents for 0437.250WR include LK112SM33TR, LK112SM50TR, 171856-0002. Contact FindMyChip for a full compatibility analysis for your specific application.
Can I use a different manufacturer's part instead of 0437.250WR?
In many cases, yes. Cross-manufacturer alternatives exist for most standard components. However, always verify pin compatibility, electrical specs, and package dimensions before substituting in production.
How do I verify 0437.250WR alternatives?
Compare the datasheet specifications including pinout, voltage ratings, timing parameters, and package dimensions. FindMyChip's engineering team can help with compatibility verification — submit an RFQ to get started.