Part A
0154001.DR
Công ty Littelfuse Inc.
- Lifecycle
- Active
- Stock
- 4698 PCS
- Series
- Fuses
Replacement verdict
Compatible functional replacement candidate
The 0154001.DR is a lower-current-rated alternative to the 0154004.DR within the same Littelfuse OMNI-BLOK fuse holder series. Both share identical fusing characteristics, voltage rating, and PCB mounting footprint, making the 0154001.DR a viable functional replacement candidate where the reduced current rating is acceptable for the target application.
Current Rating
High match
Voltage Rating
High match
Package Type
High match
Fuse Type
High match
Parts at a glance
Part B
0154004.DR
Công ty Littelfuse Inc.
- Lifecycle
- Active
- Stock
- 2594 PCS
- Package
- 2-SMD
- Series
- Fuses
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 0154004.DR | 0154001.DR | Why it matters |
|---|---|---|---|
| Current Rating | 4 A | 1 A | Determines the maximum continuous current the fuse can carry without opening; a direct functional difference affecting circuit protection sizing. |
| Voltage Rating (AC) | 125 V | 125 V | Specifies the maximum AC voltage the fuse can safely interrupt; must meet or exceed the circuit voltage. |
| Voltage Rating (DC) | 125 V | 125 V | Specifies the maximum DC voltage the fuse can safely interrupt; critical for DC-powered circuits. |
| Interrupting Rating | 50 A at 125 VAC / 50 A at 125 VDC | 50 A at 125 VAC / 50 A at 125 VDC | Indicates the maximum fault current the fuse can safely break without damage or hazard. |
| Melting I²t | 12.8 A²s | 0.58 A²s | Represents the thermal energy required to open the fuse; affects response time and coordination with other protective devices. |
| Nominal Cold Resistance | 0.0185 Ohm | 0.145 Ohm | Lower resistance reduces voltage drop and power loss in the circuit; impacts overall efficiency. |
| Voltage Drop | 0.095 V | 0.175 V | Affects the voltage available to the load and heat generation within the fuse. |
| Fuse Type | Time-Lag (Slow-Blow) | Time-Lag (Slow-Blow) | Determines tolerance to inrush currents; must match the application's surge characteristics. |
| Package / Size | 1206 (3216 Metric) | 1206 (3216 Metric) | Physical footprint must match the PCB layout for direct substitutability. |
| Operating Temperature Range | -55°C to +125°C | -55°C to +125°C | Ensures reliable operation across the application's environmental conditions. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 0154001.DR | 0154004.DR |
|---|---|---|
| Series | OMNI-BLOK® 154 | OMNI-BLOK® 154 |
| 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 | 4 A |
| Voltage Rating - AC | 125 V | 125 V |
| Voltage Rating - DC | 125 V | 125 V |
| Response Time | Fast Blow | Fast Blow |
| Breaking Capacity @ Rated Voltage | 50A | 50A |
| Melting I²t | 0.459 | 3.152 |
| 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 0154004.DR and 0154001.DR fuses?
The 0154004.DR and 0154001.DR are Littelfuse surface-mount fuses from the NANO2 154 series. The 0154004.DR is rated 4 A and the 0154001.DR is rated 1 A, both with a 125 V AC/VDC voltage rating and a 6.1 mm x 2.69 mm ceramic body.
What is the main difference between the 0154004.DR and 0154001.DR?
The primary difference is the current rating: the 0154004.DR is a 4 A fuse, while the 0154001.DR is a 1 A fuse. Both share the same NANO2 154 series package, voltage rating, and interrupting rating, so they differ mainly in the overcurrent level at which they open.
Are the 0154004.DR and 0154001.DR interchangeable?
No. Although they share the same footprint and voltage rating, their current ratings differ by a factor of four. Substituting one for the other would change the circuit's overcurrent protection threshold and could cause nuisance opening or failure to protect, so each must be selected according to the design's required current rating.
What is the voltage rating of the 0154004.DR and 0154001.DR?
Both the 0154004.DR and 0154001.DR are rated for 125 V AC and 125 V DC, as specified in the Littelfuse NANO2 154 series datasheet.
What is the interrupting rating of the 0154004.DR and 0154001.DR?
Both fuses have an interrupting rating of 50 A at 125 V AC and 50 A at 125 V DC, per the Littelfuse NANO2 154 series specifications.
What package and mounting type do the 0154004.DR and 0154001.DR use?
Both are surface-mount NANO2 fuses in a ceramic body measuring approximately 6.1 mm x 2.69 mm, supplied on tape and reel for automated PCB assembly.
Do the 0154004.DR and 0154001.DR have the same operating temperature range?
Yes. Both the 0154004.DR and 0154001.DR are specified for operation from -55 °C to +125 °C, consistent with the Littelfuse NANO2 154 series datasheet.
Which applications are suitable for the 0154004.DR versus the 0154001.DR?
The 0154001.DR at 1 A is suited to lower-current circuits, while the 0154004.DR at 4 A is suited to higher-current circuits. Selection should be based on the continuous operating current, inrush profile, and required breaking capacity of the target design, using the manufacturer's derating and time-current curves.