SMCJ130A

SMCJ130A is a high‑power, surface-mount transient voltage suppressor (TVS) diode in the SMC (DO-214AB) package. It protects high‑voltage DC rails and lines from voltage surges (ESD, transients, load dumps) by clamping excessive voltages and conducting surge current.
Key idea: the “130” indicates a nominal reverse/stand‑off voltage of about 130 V. When a transient drives the voltage above this level, the device enters breakdown and clamps the spike, helping to keep downstream electronics safe. It is designed for fast response and high peak pulse power (typical ratings are hundreds of watts, e.g., around 400 W for 10/1000 µs variants, depending on the exact part and vendor).
Common applications include telecom and industrial power supplies, automotive electronics, and anywhere a rugged transient protector is needed. Note that exact electrical specs (V_RWM, V_BR, clamp voltage, I_PP) vary by manufacturer and lot; always consult the specific datasheet for your variant (including whether it’s unidirectional or bidirectional).

Here are the key features of SMCJ130A:
- Unidirectional transient voltage suppressor (TVS) diode
- Package: SMC (DO-214AB)
- Stand-off voltage (VRWM): 130 V
- Peak pulse power: ~1500 W (8/20 μs)
- Fast response to voltage transients
- Operating temp range: -55°C to +125°C
- RoHS-compliant, Pb-free
- Suitable for protecting power lines, data lines, and automotive/industrial apps against surges and ESD.
(Exact VBR/clamping values are specified in the datasheet for precise design.)

It uses the SMC (DO-214AB) surface-mount package.

- Pin count: 2 terminals (DO-214AB SMC package).
- Function: Transient Voltage Suppressor (TVS) diode used for high-energy overvoltage/surge protection; clamps spikes to protect downstream circuitry (130V-class, unidirectional variant).

SMCJ130A is a transient-voltage-suppressor (TVS) diode. It’s not exclusive to one manufacturer; it’s made by several vendors, including Littelfuse, ON Semiconductor, Bourns, and Vishay. Littelfuse, for example, is a US-based multinational that designs and manufactures circuit-protection devices (fuses, TVS diodes, suppressors) for electronics.

Application areas: transient voltage suppression for AC mains and high-voltage DC rails up to ~170 V in power supplies and industrial equipment; protection for motors, PLCs, UPS, and telecom/datacom gear; protection for solar inverters and battery systems with mid-range DC buses; used at input stages or across lines to clamp surges and ESD.

Equivalents are other 130 V TVS diodes in the SMCJ/DO-214AB package with similar 1.5 kW peak pulse power. Major vendors offer cross-parts, including Vishay, STMicroelectronics, ON Semiconductor, Littelfuse, Bourns, and ProTek. When cross-referencing, look for 130 V standoff (unidirectional or bidirectional as required) in the SMCJ family and verify package and rating in the datasheet.