Part A
1N4148W-E3-18
Vishay Universal Semiconductor - Division diodes
- Lifecycle
- Active
- Stock
- 2407 PCS
- Package
- SOD-123
- Series
- Diodes - redresseurs - Single
Replacement verdict
Compatible functional replacement candidate
The 1N4148W and 1N4148W-E3-18 are functionally equivalent small-signal switching diodes sharing identical electrical characteristics, package footprint, and thermal ratings. The -E3-18 suffix denotes a lead-free, RoHS-compliant variant with tape-and-reel packaging, making it a viable drop-in replacement in most designs where environmental compliance or automated assembly is required.
Forward Current Rating
High match
Reverse Voltage
High match
Package Type
High match
Environmental Compliance
Validation required
Parts at a glance
Part B
1N4148W
Yangzhou yangjie Electronic Technology Co., Ltd
- Lifecycle
- Active
- Stock
- 3155 PCS
- Package
- SOD-123
- Series
- Diodes - redresseurs - 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 | 1N4148W | 1N4148W-E3-18 | Why it matters |
|---|---|---|---|
| Diode Type | Standard switching diode | Standard switching diode | Both are small-signal switching diodes, so they serve the same circuit function. |
| Reverse Voltage (Vr) | 100 V | 100 V | Determines the maximum reverse voltage the diode can block without breakdown. |
| Forward Current (If) | 150 mA | 150 mA | Sets the maximum continuous forward current the diode can safely conduct. |
| Forward Voltage (Vf) | 1.25 V at 150 mA | 1.25 V at 150 mA | Affects power loss and voltage drop in the conducting state. |
| Reverse Recovery Time (trr) | 4 ns | 4 ns | Determines how fast the diode can switch from conducting to blocking, critical for high-speed switching. |
| Package / Case | SOD-123 | SOD-123 | Must match the PCB footprint for direct drop-in replacement. |
| Mounting Type | Surface mount | Surface mount | Ensures compatibility with the assembly process and board design. |
| Power Dissipation | 350 mW | 350 mW | Defines the maximum power the diode can dissipate without overheating. |
| Operating Junction Temperature | -55 °C to 150 °C | -55 °C to 150 °C | Indicates the thermal range within which the diode can operate reliably. |
| Packaging / Part Suffix | Tape and reel, standard | Tape and reel, E3 lead-free / RoHS-compliant, 18-inch reel | The suffix indicates different packaging, reel size, and environmental compliance, which can affect manufacturing and procurement. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | 1N4148W-E3-18 | 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 1N4148W and 1N4148W-E3-18?
The 1N4148W is a generic part number for a small-signal fast switching diode in a SOD-123 surface-mount package. The 1N4148W-E3-18 is a specific ordering variant from Vishay Semiconductors that includes the "E3" lead-free (RoHS-compliant) designation and "18" tape-and-reel packaging code. Electrically, both refer to the same 1N4148W diode type, but the -E3-18 suffix defines the manufacturer's environmental compliance and packaging specification.
Are the 1N4148W and 1N4148W-E3-18 electrically identical?
Yes. Both refer to the same 1N4148W diode type, which has a repetitive peak reverse voltage (VRRM) of 100 V, a forward current (IF) of 150 mA, and a forward voltage (VF) of approximately 1.0 V at 10 mA. The -E3-18 suffix does not change the electrical characteristics; it only specifies lead-free construction and tape-and-reel packaging.
What does the "E3" suffix mean on the 1N4148W-E3-18?
The "E3" suffix is Vishay's designation for a lead-free (Pb-free) and RoHS-compliant construction. It indicates that the component meets the European Union's Restriction of Hazardous Substances directive, which limits lead content. The generic 1N4148W may be available in both leaded and lead-free versions depending on the manufacturer and date code.
What does the "18" suffix indicate on the 1N4148W-E3-18?
The "18" suffix is Vishay's packaging code for tape-and-reel delivery. Specifically, it indicates a 7-inch reel with a quantity of 10,000 pieces. This packaging format is designed for automated pick-and-place assembly equipment used in high-volume PCB manufacturing.
Can the 1N4148W and 1N4148W-E3-18 be used interchangeably in a design?
Yes, they can be used interchangeably in terms of electrical performance and footprint, provided the design does not have a specific requirement for lead-free construction or tape-and-reel packaging. Both use the same SOD-123 package with identical land patterns. However, if the design mandates RoHS compliance, the -E3-18 variant should be specified.
What is the package type for both the 1N4148W and 1N4148W-E3-18?
Both the 1N4148W and 1N4148W-E3-18 are housed in the SOD-123 surface-mount package. This package has a typical body length of 2.85 mm, a width of 1.80 mm, and a height of 1.35 mm. The SOD-123 is a two-terminal package with a cathode band for polarity identification.
What are the key switching characteristics of the 1N4148W and 1N4148W-E3-18?
Both diodes have a reverse recovery time (trr) of 4 ns maximum, making them suitable for fast switching applications. The total capacitance (CD) is typically 2 pF at 0 V, and the forward voltage is approximately 1.0 V at 10 mA. These parameters are identical for both part numbers because they share the same die.
Which manufacturers produce the 1N4148W and 1N4148W-E3-18?
The 1N4148W is a generic industry part number produced by multiple manufacturers, including Vishay, ON Semiconductor, Nexperia, and Diodes Incorporated. The 1N4148W-E3-18 is a specific Vishay Semiconductors ordering code. When cross-referencing, always verify the manufacturer's datasheet for exact specifications and compliance markings.