1N4148W-E3-18 vs 1N4148W-TP

Yes. Both the 1N4148W-TP (Micro Commercial Co) and 1N4148W-E3-18 (Vishay) are surface-mount fast switching diodes that conform to the 1N4148W specification. They share the same key ratings, including a repetitive peak reverse voltage (V_RRM) of 100 V, a forward current (I_F) of 300 mA, and a power dissipation of 350 mW at 25 °C ambient. Because the die and electrical characteristics are equivalent, they are functionally interchangeable in most designs, provided the package and thermal conditions are acceptable.

Both devices are offered in the SOD-123 surface-mount package. The 1N4148W-TP from Micro Commercial Co uses the SOD-123 package with a typical lead finish and is supplied on tape and reel. The 1N4148W-E3-18 from Vishay is also in the SOD-123 package, but the "-E3" suffix indicates a lead-free (RoHS-compliant) construction with a matte tin lead finish, and the "-18" suffix denotes a specific tape and reel packaging quantity (typically 10,000 units per reel). The physical footprint and land pattern are identical, so PCB layout compatibility is maintained.

Yes. Both diodes are specified with a reverse recovery time (t_rr) of 4 ns maximum, measured under standard conditions (I_F = 10 mA, V_R = 6 V, R_L = 100 Ω). The junction capacitance (C_D) is typically 2 pF at V_R = 0 V and 1 MHz for both parts. These parameters are derived from the respective manufacturer datasheets and are identical, ensuring equivalent switching performance in high-speed applications.

In most cases, yes, because the electrical ratings and SOD-123 package are the same. However, the designer should verify that the thermal derating and power dissipation requirements are met, as both parts have a 350 mW rating at 25 °C ambient but derate linearly above that temperature. Additionally, the 1N4148W-E3-18 is lead-free and RoHS-compliant, which may be a requirement for certain applications. Always confirm the specific manufacturer's datasheet for any design-critical parameters.

For both the 1N4148W-TP and 1N4148W-E3-18, the maximum forward voltage (V_F) is 1.0 V at I_F = 10 mA, and 1.25 V at I_F = 100 mA. The maximum reverse leakage current (I_R) is 1 µA at V_R = 75 V, and 25 µA at V_R = 100 V and T_J = 150 °C. These values are consistent across both manufacturers' datasheets and are critical for ensuring proper circuit operation.

No. Both the 1N4148W-TP and 1N4148W-E3-18 are rated for a junction temperature (T_J) range of -55 °C to +150 °C, with a storage temperature range of -65 °C to +150 °C. The thermal resistance, junction-to-ambient (R_θJA), is typically 357 °C/W for both devices when mounted on a standard PCB. These identical thermal limits ensure that either part can be used in the same thermal environment without additional derating considerations.

The 1N4148W-E3-18 is explicitly designated as lead-free and RoHS-compliant by Vishay, making it the preferred choice for new designs that must meet these environmental regulations. The 1N4148W-TP from Micro Commercial Co may also be RoHS-compliant, but the "-E3" suffix on the Vishay part provides a clear, verifiable indication of lead-free construction. Designers should always confirm the compliance status from the latest manufacturer datasheet or product page.

The 1N4148W-TP is typically supplied in tape and reel packaging with a standard quantity of 3,000 units per reel, while the 1N4148W-E3-18 is supplied in tape and reel with 10,000 units per reel (indicated by the "-18" suffix). Both use the same 8 mm tape width and 4 mm pitch, compatible with standard surface-mount pick-and-place equipment. The difference in reel quantity may affect inventory management and feeder loading frequency but does not impact the assembly process itself.