NX7002BKR
Nexperia USA Inc.
Needs validationlow risk
A Nexperia alternative in the same package with higher current and lower on-resistance.
Best Alternatives to BSS138AKAR
BSS138AKAR is a 60V, 200mA N-Channel Trench MOSFET in a SOT-23 package from Nexperia, commonly used for switching and driver applications. When seeking a replacement, several alternatives offer similar or improved electrical characteristics in the same package.
AI replacement insight
Package riskmedium
Pinout for SOT-23 transistors is not universal. Verification is mandatory.
Electrical risklow
Most candidates offer superior current and Rds(on) ratings. One has slightly higher Rds(on), which could impact efficiency.
Sourcing risklow
Multiple alternatives from different manufacturers are available, improving supply chain resilience.
Can it be replaced directly?
There are several strong N-Channel MOSFET candidates in a SOT-23 package that meet or exceed the BSS138AKAR's key specifications, but pinout compatibility must be verified from datasheets before use.
Best replacement path
NX7002BKR from the same manufacturer (Nexperia) or T2N7002BK,LM from Toshiba offer upgraded current and on-resistance specs in the same package.
Main risk
The primary risk is pinout incompatibility. While the SOT-23 package is standard, the Gate, Drain, and Source pin assignments can vary between manufacturers and must be confirmed.
Recommended alternatives
5Alternative comparison matrix
| Feature / factor | BSS138AKAR | NX7002BKR | T2N7002BK,LM | RK7002BM | Compatibility / risk |
|---|---|---|---|---|---|
| Package | SOT-23 (TO-236AB) | SOT23 (TO-236AB) | SOT-23 | SOT-23 | SOT23 (TO-236AB) / SOT-23 — Package matches, pinout requires verification.; T2N7002BK,LM: Package matches, pinout requires verification.; RK7002BM: Package matches, pinout requires verification.; T2N7002AK-ES: Package matches, pinout requires verification. |
| Voltage | 60V | 60V | 1.1V - 2.1V | 60V | 60V / 1.1V - 2.1V — Drain-Source Voltage (Vdss) matches.; T2N7002BK,LM: Gate Threshold Voltage (Vgs(th)) range is similar.; RK7002BM: Drain-Source Voltage (Vdss) matches.; T2N7002AK-ES: Drain-Source Voltage (Vdss) matches. |
| Current | 200mA | 270mA | 400mA | 300mA | 270mA / 400mA / 300mA — Continuous Drain Current (Id) is higher.; T2N7002BK,LM: Continuous Drain Current (Id) is higher.; RK7002BM: Continuous Drain Current (Id) is higher.; T2N7002AK-ES: Continuous Drain Current (Id) is higher. |
| Resistance | 2.7 Ohm | 2.2 Ohm | 1.05 Ohm | 2.2 Ohm | 2.2 Ohm / 1.05 Ohm / 1.85 Ohm — On-resistance (Rds(on)) is lower, which is better.; T2N7002BK,LM: On-resistance (Rds(on)) is lower, which is better.; RK7002BM: On-resistance (Rds(on)) is lower, which is better.; T2N7002AK-ES: On-resistance (Rds(on)) is lower, which is better. |
Application & sourcing insights
Questions & answers
Verified drop-in options for BSS138AKAR are limited in the current batch. Review candidates marked Strong match or Datasheet verified, and validate package, pinout, and electrical limits before committing a BOM change.