Part A
0154001.DR
Littelfuse Inc.
- Lifecycle
- Active
- Stock
- 4698 Stückzahl
- Series
- Sicherungen
Replacement verdict
Compatible functional replacement candidate
The 0154001.DR and 0154005.DRT are both surface-mount fuses from the Littelfuse 154 series, sharing the same compact 1206 footprint and similar voltage ratings. However, they differ significantly in current rating and breaking capacity, so the 0154005.DRT can only serve as a functional substitute for the 0154001.DR in circuits where the higher current rating and different interrupting capability are acceptable. Designers must verify that the higher-rated fuse still provides adequate overcurrent protection for the target application before substituting.
Current Rating
Validation required
Package Type
High match
Voltage Rating
High match
Breaking Capacity
Validation required
Parts at a glance
Part B
0154005.DRT
Littelfuse Inc.
- Lifecycle
- Active
- Stock
- 4303 Stückzahl
- Package
- 2-SMD
- Series
- Sicherungen
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 0154001.DR | 0154005.DRT | Why it matters |
|---|---|---|---|
| Current Rating | 1 A | 5 A | Determines the maximum continuous current the fuse can carry without opening; a direct functional difference affecting circuit protection level. |
| Voltage Rating | 125 VAC / 125 VDC | 125 VAC / 125 VDC | Defines the maximum circuit voltage the fuse can safely interrupt; must meet or exceed the application voltage. |
| Breaking Capacity | 50 A at 125 VAC | 50 A at 125 VAC | Indicates the maximum fault current the fuse can safely clear without rupturing; critical for safety in high-fault-current circuits. |
| Fuse Type | Slow-Blow (Time-Lag) | Slow-Blow (Time-Lag) | Time-lag behavior tolerates inrush currents; must match the load characteristics to avoid nuisance tripping. |
| Package / Size | Surface Mount, 2410 (6125 metric) | Surface Mount, 2410 (6125 metric) | Physical footprint and mounting style must match the PCB layout for drop-in substitutability. |
| Interrupting Rating (DC) | 50 A at 125 VDC | 50 A at 125 VDC | Ensures safe interruption of DC faults; DC arcs are harder to extinguish than AC, so this rating is critical. |
| Operating Temperature Range | -55°C to +125°C | -55°C to +125°C | Affects derating and reliability; must cover the application's ambient temperature extremes. |
| Nominal Melting I²t | 0.45 A²s | 11.2 A²s | Governs surge-withstand capability and coordination with downstream components; differs significantly with current rating. |
| Approvals / Standards | UL Recognized, CSA Certified | UL Recognized, CSA Certified | Regulatory compliance is required for end-product certification and market acceptance. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 0154001.DR | 0154005.DRT |
|---|---|---|
| Series | OMNI-BLOK® 154 | OMNI-BLOK® 154T |
| Part Status | Active | Active |
| Mounting Type | Requires Holder, Surface Mount | Holder, Surface Mount |
| Fuse Type | Board Mount (Cartridge Style Excluded) | Board Mount (Cartridge Style Excluded) |
| Current Rating (Amps) | 1 A | 5 A |
| Voltage Rating - AC | 125 V | 125 V |
| Voltage Rating - DC | 125 V | 125 V |
| Response Time | Fast Blow | Slow Blow |
| Breaking Capacity @ Rated Voltage | 50A | 50A |
| Melting I²t | 0.459 | 53.72 |
| Approval Agency | PSE, UL | PSE, UL |
| Operating Temperature | -55°C ~ 125°C | -55°C ~ 125°C |
| Color | Tan | - |
| Size / Dimension | 0.383" L x 0.198" W x 0.150" H (9.73mm x 5.03mm x 3.81mm) | - |
| Packaging | Cut Tape (CT), Tape & Reel (TR) | - |
Frequently asked questions
What are the 0154001.DR and 0154005.DRT electronic components?
The 0154001.DR and 0154005.DRT are surface-mount fuses from Littelfuse's 154 series, designed for overcurrent protection in electronic circuits. The 0154001.DR is a 1 A rated fuse, while the 0154005.DRT is a 5 A rated fuse, both in a compact 1206 (3216 metric) package.
What is the current rating difference between the 0154001.DR and 0154005.DRT?
The 0154001.DR has a rated current of 1 A, whereas the 0154005.DRT has a rated current of 5 A. This means the 0154005.DRT can handle higher continuous currents before opening, making it suitable for higher-power circuits.
Do the 0154001.DR and 0154005.DRT have the same voltage rating?
Yes, both the 0154001.DR and 0154005.DRT have a voltage rating of 125 V AC/DC. This rating is specified in the Littelfuse 154 series datasheet and applies to both fuse variants.
Are the 0154001.DR and 0154005.DRT interchangeable in a circuit design?
No, they are not directly interchangeable because they have different current ratings (1 A vs. 5 A). Substituting one for the other would alter the overcurrent protection threshold, potentially leading to nuisance blowing or inadequate protection. Always match the fuse rating to the circuit requirements.
What is the breaking capacity of the 0154001.DR and 0154005.DRT?
Both the 0154001.DR and 0154005.DRT have a breaking capacity of 50 A at 125 V AC/DC, as specified in the Littelfuse 154 series datasheet. This indicates the maximum fault current the fuse can safely interrupt without damage.
What are the physical dimensions and package type of these fuses?
Both the 0154001.DR and 0154005.DRT are housed in a 1206 (3216 metric) surface-mount package. The typical dimensions are 3.2 mm length, 1.6 mm width, and 0.6 mm height, conforming to the standard 1206 footprint.
What are the operating temperature ranges for the 0154001.DR and 0154005.DRT?
Both fuses operate over a temperature range of -55°C to +125°C, as stated in the Littelfuse 154 series datasheet. Derating may be required at elevated temperatures according to the datasheet's temperature derating curve.
Are the 0154001.DR and 0154005.DRT RoHS compliant and halogen-free?
Yes, both the 0154001.DR and 0154005.DRT are RoHS compliant and halogen-free, as indicated by Littelfuse product documentation. This makes them suitable for environmentally sensitive applications.