Part A
1N4148W-E3-08
Vishay General Semiconductor - Bộ phận Diode
- Lifecycle
- Active
- Stock
- 2797 PCS
- Package
- SOD-123
- Series
- Diodes - Rectifiers - Single
Replacement verdict
Compatible functional replacement candidate
The 1N4148W-E3-08 is a functionally equivalent, drop-in replacement candidate for the 1N4148W. Both devices share identical small-signal switching diode characteristics, including forward current, reverse voltage, package footprint, and thermal behavior. The -E3-08 suffix denotes a lead-free, RoHS-compliant, automotive-grade qualification variant from the same manufacturer, making it suitable for direct substitution in most designs with no electrical or mechanical redesign required.
Forward Current Rating
High match
Reverse Voltage Rating
High match
Package Type
High match
Compliance and Qualification
High match
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 1N4148W | 1N4148W-E3-08 | Why it matters |
|---|---|---|---|
| Manufacturer | Vishay / multiple | Vishay | The -E3-08 suffix denotes a specific Vishay orderable part; generic 1N4148W may come from various manufacturers with slightly different specs. |
| Diode Type | Small-signal fast switching diode | Small-signal fast switching diode | Both are the same functional class, so they are interchangeable in switching applications. |
| Package / Case | SOD-123 | SOD-123 | Identical footprint ensures direct PCB drop-in replacement without layout changes. |
| Reverse Voltage (Vr) | 75 V | 75 V | Determines the maximum reverse blocking voltage the diode can withstand. |
| Forward Current (If) | 150 mA | 150 mA | Sets the maximum continuous forward current rating for the application. |
| Forward Voltage (Vf) | 1.25 V @ 100 mA | 1.25 V @ 100 mA | Affects power dissipation and voltage drop in the conducting state. |
| Reverse Recovery Time (trr) | 4 ns | 4 ns | Critical for high-speed switching performance; lower trr enables faster operation. |
| Power Dissipation | 350 mW | 350 mW | Defines the maximum power the package can safely dissipate. |
| Packaging / Ordering Suffix | Standard tape and reel | Tape and reel, E3 = lead-free/RoHS, 08 = 8 mm tape | The -E3-08 suffix specifies RoHS compliance and tape width, which matters for automated assembly and environmental compliance. |
| RoHS Compliance | Varies by manufacturer | RoHS compliant (E3 designation) | RoHS compliance is required for products sold in many regions; the E3 suffix guarantees lead-free construction. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 1N4148W-E3-08 | 1N4148W |
|---|---|---|
| Part Status | Active | Active |
| Diode Type | Standard | Standard |
| Voltage - DC Reverse (Vr) (Max) | 75 V | 75 V |
| Current - Average Rectified(Io) | 150mA | 150mA |
| Voltage - Forward (Vf) (Max) @ If | 1.2 V @ 100 mA | 1.25 V @ 100 mA |
| Speed | Small Signal =< 200mA (Io), Any Speed | Small Signal =< 200mA (Io), Any Speed |
| Reverse Recovery Time (trr) | 4 ns | 4 ns |
| Current - Reverse Leakage @ Vr | 100 µA @ 100 V | 1 µA @ 75 V |
| Capacitance @ Vr F | 4pF @ 0V, 1MHz | 4pF @ 0V, 1MHz |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What is the difference between the 1N4148W and the 1N4148W-E3-08?
The 1N4148W is a generic industry part number for a small-signal fast switching diode in a SOD-123 surface-mount package. The 1N4148W-E3-08 is a specific manufacturer part number from Vishay Semiconductors that uses the same 1N4148W diode type and SOD-123 package, with the "-E3" suffix indicating a lead-free (RoHS-compliant) finish and "-08" indicating tape-and-reel packaging. Electrically, both refer to the same 1N4148W diode specification.
Are the 1N4148W and 1N4148W-E3-08 electrically identical?
Yes. The 1N4148W-E3-08 is a Vishay ordering variant of the 1N4148W diode. Both share the same 1N4148W electrical characteristics, including a repetitive peak reverse voltage (V_RRM) of 100 V, a forward current (I_F) of 300 mA, and a forward voltage (V_F) of approximately 1.2 V at 100 mA, as specified in the Vishay 1N4148W datasheet.
Can the 1N4148W and 1N4148W-E3-08 be used interchangeably in a design?
In most cases yes, because the 1N4148W-E3-08 is simply a lead-free, tape-and-reel packaged version of the 1N4148W diode. However, designers should confirm that the specific 1N4148W part being replaced meets the same electrical and thermal specifications, and that the lead-free (E3) termination finish and reel packaging are acceptable for the assembly process.
What does the "-E3" suffix mean on the 1N4148W-E3-08?
The "-E3" suffix is a Vishay Semiconductors designation indicating that the device is lead-free and RoHS-compliant, with a matte tin (Sn) plated termination finish. This is a packaging and environmental compliance identifier, not an electrical parameter change.
What does the "-08" suffix mean on the 1N4148W-E3-08?
The "-08" suffix is a Vishay ordering code that specifies the tape-and-reel packaging option for automated surface-mount assembly. It does not alter the electrical characteristics of the 1N4148W diode.
What package do the 1N4148W and 1N4148W-E3-08 use?
Both the 1N4148W and the 1N4148W-E3-08 are housed in the SOD-123 surface-mount package, which has a typical power dissipation of 410 mW at 25 °C ambient temperature when mounted on a ceramic substrate, per the Vishay 1N4148W datasheet.
What are the key switching characteristics of the 1N4148W and 1N4148W-E3-08?
Both devices are fast switching diodes with a reverse recovery time (t_rr) of 4 ns maximum, a junction capacitance (C_D) of 2 pF typical at 0 V, and a forward voltage (V_F) of 1.2 V maximum at 100 mA, as specified in the Vishay 1N4148W datasheet. These characteristics make them suitable for high-speed switching applications.
Are the 1N4148W and 1N4148W-E3-08 RoHS compliant?
The 1N4148W-E3-08 is explicitly RoHS-compliant and lead-free, as indicated by the "-E3" suffix in the Vishay part number. A generic 1N4148W may or may not be RoHS-compliant depending on the manufacturer and ordering suffix, so the specific manufacturer datasheet should be consulted to confirm compliance.
Which part number should be used for automated PCB assembly?
The 1N4148W-E3-08 is the preferred choice for automated surface-mount assembly because the "-08" suffix specifies tape-and-reel packaging, which is compatible with pick-and-place equipment. A generic 1N4148W may be supplied in bulk or alternative packaging unless a specific reel option is ordered.