Part A
1N4148W-E3-08
Vishay General Semiconductor - Divisão de Diodes
- Lifecycle
- Active
- Stock
- 2797 PCS
- Package
- SOD-123
- Series
- Diodes - Rectificadores - Single
Replacement verdict
Compatible functional replacement candidate
The 1N4148WS-E3-08 and 1N4148W-E3-08 are both surface-mount small-signal switching diodes from Vishay with identical electrical ratings and forward characteristics, making them functionally interchangeable in most circuit designs. The primary distinction lies in package footprint and thermal handling, so verification of board layout and thermal requirements is recommended before substituting one for the other.
Forward Current Rating
High match
Reverse Voltage Rating
High match
Package Type
Validation required
Power Dissipation
Validation required
Parts at a glance
Part B
1N4148WS-E3-08
Vishay General Semiconductor - Divisão de Diodes
- Lifecycle
- Active
- Stock
- 5292 PCS
- Package
- SOD-323-2
- Series
- Diodes - Rectificadores - Single
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | 1N4148WS-E3-08 | 1N4148W-E3-08 | Why it matters |
|---|---|---|---|
| Manufacturer | Vishay | Vishay | Same manufacturer ensures consistent process, quality, and documentation. |
| Package / Case | SOD-323 | SOD-123 | Different footprints require different PCB land patterns, so they are not drop-in replacements. |
| Average Rectified Forward Current (IO) | 150 mA | 150 mA | Defines the maximum continuous current the diode can handle in a circuit. |
| Repetitive Peak Reverse Voltage (VRRM) | 100 V | 100 V | Sets the maximum reverse voltage the diode can block without breakdown. |
| Forward Voltage (VF) at 10 mA | 1.0 V max | 1.0 V max | Affects power loss and signal level in forward conduction. |
| Reverse Recovery Time (trr) | 4 ns max | 4 ns max | Determines switching speed in high-frequency and fast-switching applications. |
| Reverse Leakage Current (IR) at 75 V | 1 µA max | 1 µA max | Low leakage is important for signal integrity and low-power circuits. |
| Junction Capacitance (CD) | 4 pF max | 4 pF max | Capacitance impacts high-frequency performance and signal distortion. |
| Power Dissipation (Ptot) | 200 mW | 350 mW | Higher power dissipation allows more thermal headroom in the SOD-123 package. |
| Operating Junction Temperature (Tj) | -55 °C to +150 °C | -55 °C to +150 °C | Defines the thermal range over which the diode remains reliable. |
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Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 1N4148W-E3-08 | 1N4148WS-E3-08 |
|---|---|---|
| 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 | 1.2 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 | 100 µA @ 100 V |
| Capacitance @ Vr F | 4pF @ 0V, 1MHz | 4pF @ 0V, 1MHz |
| Mounting Type | Surface Mount | Surface Mount |
Frequently asked questions
What are the main differences between the 1N4148WS-E3-08 and the 1N4148W-E3-08?
The primary difference is the package type. The 1N4148WS-E3-08 is supplied in the SOD-323 (SC-76) surface-mount package, while the 1N4148W-E3-08 is supplied in the SOD-123 surface-mount package. Both are single small-signal switching diodes with similar electrical ratings, but their footprint, body dimensions, and thermal characteristics differ due to the package.
Are the 1N4148WS-E3-08 and 1N4148W-E3-08 electrically identical?
Both devices are based on the 1N4148 small-signal diode specification and share key ratings such as a repetitive peak reverse voltage (V_RRM) of 100 V, a forward current (I_F) of 150 mA, and a forward voltage (V_F) of approximately 1 V at 10 mA. However, because they use different packages, parameters such as power dissipation, thermal resistance, and junction capacitance can differ. Designers should verify the specific datasheet for each part before assuming electrical equivalence.
Can the 1N4148WS-E3-08 and 1N4148W-E3-08 be used interchangeably on the same PCB footprint?
No. The SOD-323 package of the 1N4148WS-E3-08 and the SOD-123 package of the 1N4148W-E3-08 have different land patterns, pad spacing, and body dimensions. A board designed for one package will not accept the other without a layout revision or an appropriate footprint adapter.
What is the continuous forward current rating for these diodes?
Both the 1N4148WS-E3-08 and the 1N4148W-E3-08 are rated for a maximum continuous forward current (I_F) of 150 mA, consistent with the standard 1N4148 specification. Pulsed forward current ratings are higher and are defined in the respective manufacturer datasheets.
What is the repetitive peak reverse voltage (V_RRM) of the 1N4148WS-E3-08 and 1N4148W-E3-08?
Both devices have a repetitive peak reverse voltage (V_RRM) of 100 V. This rating is common to the 1N4148 family and is maintained across the SOD-323 and SOD-123 package variants.
Do the 1N4148WS-E3-08 and 1N4148W-E3-08 differ in power dissipation capability?
Yes. Power dissipation depends on the package and its thermal resistance to the ambient or to the PCB. The SOD-123 package of the 1N4148W-E3-08 generally offers a higher power dissipation capability than the smaller SOD-323 package of the 1N4148WS-E3-08. The exact ratings must be taken from the manufacturer datasheet for each part.
Are the 1N4148WS-E3-08 and 1N4148W-E3-08 RoHS compliant and halogen-free?
Both part numbers carry the "-E3" suffix, which in the Vishay naming convention indicates RoHS-compliant and halogen-free construction. Designers should confirm this against the current manufacturer datasheet or product page, as compliance declarations can be updated over time.
Which package is better for high-density PCB designs, the 1N4148WS-E3-08 or the 1N4148W-E3-08?
The 1N4148WS-E3-08 in the SOD-323 package is smaller and is generally preferred for high-density surface-mount designs where board space is limited. The 1N4148W-E3-08 in the SOD-123 package occupies more area but can offer better thermal performance and easier handling in some assembly processes.