onsemi SA130CA

Overview

SA130CA from Fairchild Semiconductor is a bidirectional 500 W transient voltage suppressor (TVS) diode in DO-15 package, designed for clamping ESD and surge events on data lines and power rails. It features a 130 V reverse stand-off voltage (VRWM), 144–159 V breakdown voltage (VBR), 209 V clamping voltage at 2.4 A peak pulse current, and operates up to +175 °C junction temperature.

For engineers reviewing the SA130CA datasheet, pinout, applications, or equivalent options, this device serves as a robust overvoltage protection component in telecom interfaces, industrial control I/O, automotive body electronics, and AC/DC power supply input stages where fast response (<5 ns), low leakage (<1 µA at VRWM), and high surge capability are required.

Technical Context

The SA130CA is a bipolar junction TVS diode with glass passivation, optimized for unidirectional or bidirectional clamping depending on suffix - the "CA" denotes bidirectional operation with symmetrical electrical characteristics in both polarities. Its clamping behavior is defined by a 10/1000 µs waveform, and it exhibits low incremental surge resistance for stable voltage limiting under repetitive transients.

It delivers 500 W peak pulse power dissipation at TA = 25 °C, derates linearly above 75 °C ambient, and maintains <1 µA reverse leakage at 130 V (VRWM), enabling use in high-impedance sensing and low-power standby circuits without signal degradation.

Key Specifications

Pinout & Package

DO-15 axial-leaded package with no cathode band (bidirectional configuration). Leads are tinned copper, 0.375" length, rated for 1.0 W steady-state dissipation at 75 °C ambient.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar transient voltage suppression applications.

Compared with SMBJ130CA and P6SMB130CA, the SA130CA offers proven axial-leaded mechanical robustness and thermal performance in through-hole power supply and industrial I/O designs, but requires more board area and manual assembly - making it optimal for cost-sensitive, medium-volume applications where layout flexibility and thermal mass are prioritized over miniaturization.

Availability

SA130CA is available at Aetrix Electronics and suitable for industrial PLC analog inputs, automotive BCM CAN bus protection, and AC/DC power supply input stages requiring stable component supply, long-lifecycle support, and traceable sourcing.

Supply support for SA130CA includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and discrete components before its acquisition by ON Semiconductor in 2016. Its legacy TVS portfolio remains widely deployed in industrial and automotive systems.

The SA130CA belongs to Fairchild's SAxxxC(A) family of 500 W DO-15 TVS diodes, engineered for high-reliability overvoltage protection in harsh-environment applications where surge immunity, thermal stability, and long-term leakage performance are critical.

FAQ

What is the clamping voltage of the SA130CA at its rated peak pulse current?

The SA130CA has a maximum clamping voltage (VC) of 209 V at its specified peak pulse current of 2.4 A, measured on a 10/1000 µs waveform. This value is guaranteed across temperature and ensures downstream circuitry remains within safe operating limits during surge events. The SA130CA's low incremental resistance contributes to consistent clamping performance even under varying surge magnitudes.

Is the SA130CA unidirectional or bidirectional, and how does that affect its circuit placement?

The SA130CA is a bidirectional TVS diode, indicated by the "CA" suffix. It provides symmetrical clamping in both polarities, so no cathode marking is present and orientation during placement is irrelevant. This makes the SA130CA ideal for protecting AC-coupled or differential signal lines - such as CAN bus or telecom interfaces - where voltage transients can occur in either direction relative to ground.

Does the SA130CA meet industry-standard surge immunity requirements like IEC 61000-4-5?

Yes, the SA130CA's 500 W peak pulse power rating on the 10/1000 µs waveform directly supports compliance with IEC 61000-4-5 Level 4 (4 kV line-to-earth, 2 kV line-to-line) when properly integrated with series impedance. Its 209 V clamping voltage and sub-5 ns response ensure effective energy diversion before sensitive components exceed their absolute maximum ratings - a key requirement for industrial and automotive certification testing.

What is the maximum operating temperature for the SA130CA, and how does derating work?

The SA130CA has a maximum operating junction temperature of +175 °C and a storage range of −65 to +175 °C. Its steady-state power dissipation derates linearly from 1.0 W at 75 °C ambient to zero at 175 °C, per the published derating curve. Engineers must calculate board-level thermal resistance to ensure TJ remains within limit under continuous bias conditions - especially in enclosed or high-ambient environments.

Can the SA130CA be used in place of a MOV for surge protection?

The SA130CA is not a direct replacement for metal-oxide varistors (MOVs) due to lower energy absorption capacity per joule, but it complements them effectively: MOVs handle high total energy (e.g., lightning), while the SA130CA provides precise, low-leakage, fast-response clamping for residual transients. In hybrid protection schemes, the SA130CA is often placed downstream of an MOV to protect sensitive ICs - leveraging its 130 V VRWM and 209 V VC to refine voltage limiting beyond what the MOV alone achieves.