Taiwan Semiconductor Corporation SA110H

Overview

SA110H from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 110V working stand-off voltage (VWM), 122–149V breakdown voltage (VBR), and 196V maximum clamping voltage (VC) at 2.6A peak pulse current. It delivers AEC-Q101 qualification for automotive-grade surge immunity and protects power rails and signal lines against ESD, EFT, and inductive switching transients.

For engineers reviewing the SA110H datasheet, SA110H pinout, SA110H application, or SA110H equivalent, key selection criteria include its 110V VWM compatibility with 12V/24V automotive systems, low leakage (<1μA @ 110V), fast sub-nanosecond response, and AEC-Q101 qualification-critical for under-hood ECUs, body control modules, and infotainment power inputs.

Technical Context

The SA110H operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (122–149V at 1mA test current). Its clamping action limits transient energy to ≤196V at 2.6A (10/1000μs waveform), enabling robust protection of downstream 110V-rated circuits without forward conduction during normal operation.

Designed for high-reliability automotive environments, it features a 175°C maximum junction temperature, RoHS-compliant halogen-free molding compound, pure tin-plated leads, and JESD201 Class 2 whisker resistance-ensuring long-term solder joint integrity under thermal cycling and vibration stress.

Key Specifications

Pinout & Package

SA110H is housed in a DO-204AC (DO-15) axial-leaded package with cathode band marking. The device has two terminals: anode and cathode. Polarity is marked by a single band indicating the cathode end; correct orientation is essential for unidirectional clamping functionality.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SMAJ110A and 1.5KE110A, SA110H uniquely combines AEC-Q101 qualification, 500W surge rating, and DO-15 through-hole compatibility-making it the only drop-in solution for automotive production programs requiring both reliability and legacy assembly support.

Availability

SA110H is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and LED lighting driver systems requiring stable component supply and long-term lifecycle assurance.

Supply support for SA110H 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

Taiwan Semiconductor Company (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, serving global automotive, industrial, and consumer markets since 1979.

The SA Series TVS diodes are engineered specifically for high-reliability transient suppression in harsh environments-emphasizing AEC-Q101 qualification, tight parametric distribution, and robust package construction for under-hood and factory-floor deployment.

FAQ

What is the clamping voltage of SA110H at its rated peak pulse current?

The SA110H has a maximum clamping voltage (VC) of 196 V at 2.6 A peak pulse current (IPPM), measured under the standard 10/1000 μs double-exponential surge waveform. This value defines the upper voltage limit imposed on protected circuitry during transient events and is confirmed in the official TSC SA Series datasheet revision L2105, Table on page 4.

Is SA110H unidirectional or bidirectional, and how is polarity identified?

SA110H is a unidirectional TVS diode. Polarity is indicated by a single cathode band on the DO-204AC (DO-15) package body-the banded end is the cathode and must be connected toward the protected voltage rail, while the unbanded end (anode) connects to ground. Bidirectional variants carry a "CA" suffix (e.g., SA110CA), which SA110H does not.

Does SA110H meet AEC-Q101 requirements, and what tests does that include?

Yes, SA110H is explicitly AEC-Q101 qualified per the ordering code suffix "H", as documented in TSC's SA Series datasheet (L2105, page 5). This qualification covers high-temperature operating life (HTOL), temperature cycling (TC), high-temperature reverse bias (HTRB), and human-body-model ESD (HBM ≥ 8 kV), validating suitability for automotive under-hood applications.

What is the maximum junction temperature and thermal derating behavior of SA110H?

The SA110H has a maximum junction temperature (TJ) of +175°C and follows standard derating curves shown in Figure 2 of the TSC datasheet: peak pulse power decreases linearly above TA = 25°C, reaching ~50% of 500W at 100°C ambient. Derating is based on lead temperature (TL) at 75°C for steady-state power dissipation of 3W.

Can SA110H be used in place of SA110 or SA110A, and what is the key functional difference?

SA110H is not interchangeable with SA110 or SA110A without design review: SA110H adds AEC-Q101 qualification and tighter process controls, while SA110 (no suffix) and SA110A (lower VBR variant) lack automotive qualification. All three share identical VWM (110V), package (DO-15), and pinout-but SA110H is the only version approved for production automotive ECUs.