SMCJ28CA

SMCJ28CA is a surface-mount transient-voltage-suppressor (TVS) diode in the SMB/DO-214AB package. The "28" indicates a nominal standoff voltage near 28 V, and the "CA" suffix designates bidirectional operation (non-polar, symmetrical). It protects circuits from high-voltage transients such as load dumps, inductive spikes, and ESD in 24–28 V systems (e.g., automotive, industrial, telecom).
Key points:
- Bidirectional TVS diode (CA = bidirectional)
- Typical working/standoff voltage around 28 V
- High peak pulse power capability (in the 600 W class, 10/1000 µs)
- Package: SMB/DO-214AB with wide operating temperature range (roughly -55 to 125 °C)
- Used across supply rails or signal lines to clamp surges
For exact values (Vrwm, Vbr, Vclamp, IPP) consult the specific datasheet for the SMCJ28CA from the manufacturer.

Equivalents are 28 V bidirectional TVS diodes in the SMC (DO-214AB) package with ~1.5 kW peak pulse power. Different vendors use different cross-references, but you can substitute SMCJ28CA with any 28 V bidirectional SMC TVS that matches the same standoff and clamp specs (or higher) and same footprint. Common sources include Vishay, Littelfuse, ON Semiconductor, ProTek, etc. Always verify cross-reference tables in the datasheet.

SMCJ28CA features (concise):
- TVS diode in SMC package (DO-214AB)
- VRWM ~ 28 V (protects 24–28 V systems)
- Peak pulse power: about 1.5 kW (10/1000 μs)
- Very fast transient response for immediate clamping
- Low leakage at VRWM
- Operating temp: typically -55°C to 125°C
- RoHS-compliant; automotive-grade options available
- Ideal for protection of DC power lines, automotive/industrial I/O, and data ports

- Pin count: 2 terminals (two-lead device in DO-214AB/SMC package).
- Function: Transient-voltage-suppressor (TVS) diode used to clamp voltage transients and protect circuits; 28 indicates its nominal standoff/clamp voltage on the line.

SMCJ28CA is a TVS diode in the SMCJ package. It is produced by several manufacturers; a common source is Littelfuse, Inc. Littelfuse is a global electronics components company that specializes in circuit protection devices (fuses, TVS diodes, surge protection) and related power-management components.

SMCJ28CA is a 28V standoff TVS diode used for transient protection. Applications: protect 28V DC rails and associated circuits against surges, spikes, ESD, and inductive kick. Common areas: automotive 24V/28V electrical systems, industrial control panels and DC buses, telecom/datacom equipment with 28V rails, solar/renewable power electronics and PV charge controllers, power-supply inputs and DC-DC converter front-ends, battery-management systems and energy-storage electronics, and any 28V system requiring rugged transient/surge protection on power and I/O lines.

SMCJ28CA uses the SMC package (DO-214AB), the larger surface-mount TVS diode package.