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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > TVS Diodes

Taiwan Semiconductor Corporation SA100AH

Name: SA100AH
Brand: Taiwan Semiconductor Corporation
SKU: SA100AH
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SA100AH

Manufacturer:: Taiwan Semiconductor Corporation

Category:: TVS Diodes

Package:: DO-204AC, DO-15, Axial

Datasheet:: SA100AH.pdf

Description:: TVS DIODE 100VWM 162VC DO204AC

Quantity:: RFQ Add To RFQ list

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Product details

Overview

SA100AH from Taiwan Semiconductor is a unidirectional AEC-Q101 qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 100 V working stand-off voltage, 111–136 V breakdown voltage at 1 mA test current, and 179 V maximum clamping voltage at 2.9 A peak pulse current under 10/1000 µs waveform. It delivers 500 W surge capability and is designed for automotive-grade ESD and load-dump protection in power electronics.

For engineers reviewing the SA100AH datasheet, SA100AH pinout, SA100AH application, or SA100AH equivalent, this page provides verified electrical parameters, clamping behavior, thermal limits, AEC-Q101 qualification status, and direct alternatives with documented voltage and clamping differences - critical for automotive front-end protection, DC-DC converter input stages, and battery management system surge hardening.

Technical Context

The SA100AH operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its 111–136 V breakdown range (V_BR @ I_T = 1 mA), limiting transients to ≤179 V at 2.9 A (10/1000 µs). Its low leakage (<1 µA @ 100 V) ensures minimal standby power loss in high-impedance circuits.

Designed for automotive environments, it meets AEC-Q101 stress requirements including temperature cycling, humidity bias, and mechanical shock. The DO-204AC package supports lead-free soldering per J-STD-002 and passes JESD201 Class 2 whisker testing, with operating junction temperature up to +175 °C.

Key Specifications

Parameter	Value and Actual Design Meaning
V_WM	100 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for safe circuit operation.
V_BR min/max	111 V / 136 V @ 1 mA - Confirmed breakdown threshold range; defines minimum overvoltage level at which clamping initiates reliably.
V_C @ I_PPM	179 V @ 2.9 A - Clamped voltage during 10/1000 µs surge; determines worst-case voltage seen by protected downstream ICs.
P_PK	500 W - Peak pulse power rating; validates capability to absorb single high-energy transients without failure.
I_R @ V_WM	<1 µA - Reverse leakage at 100 V; ensures negligible current draw in standby, critical for low-power automotive modules.
T_J max	+175 °C - Maximum junction temperature; enables use in under-hood applications with high ambient thermal stress.

Pinout & Package

DO-204AC (DO-15) package: axial-leaded, molded epoxy case with cathode band marking polarity; terminals are pure tin-plated for RoHS-compliant solderability per J-STD-002; weight ≈ 0.400 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward current path / low-side reference	Connected to ground or lower-potential node; conducts during forward surge (e.g., inductive kickback reversal).
Cathode	Protected line connection / high-side input	Connected to the line being protected (e.g., 12 V battery rail); blocks reverse current until V_BR exceeded.

Key Features

Feature	Design Value
AEC-Q101 qualification	Validated for automotive reliability: temperature cycling, HAST, mechanical shock, and bond strength per JEDEC standards.
Fast response time	<1.0 ps from 0 V to V_BR - Enables sub-nanosecond clamping onset, protecting sensitive gate drivers and microcontrollers from ESD.
Low clamping ratio	V_C/V_BR ≈ 1.52 (179 V / 118 V typical) - Minimizes overvoltage stress on downstream components during surge events.
Halogen-free construction	Complies with IEC 61249-2-21 - Supports environmental compliance for automotive OEM supply chains requiring halogen-free PCB assembly.

Applications

Automotive Battery Rail Protection	DC-DC Converter Input Stage
Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before they reach regulator ICs. Use Value: Limits peak voltage to ≤179 V during 500 W surges, preventing damage to 36 V-rated input stages of buck controllers like LM5143A.	Use Scenario: Safeguarding isolated DC-DC converter primary-side MOSFET gates and controller ICs against coupling transients from high-di/dt switching nodes. IC Role / Device Role / Timing Role: Placed across input bulk capacitor to suppress common-mode spikes induced by transformer leakage in flyback or forward topologies. Use Value: Sub-1 ns response ensures clamping occurs before gate oxide breakdown thresholds (e.g., <200 V) of 650 V SiC MOSFET drivers are exceeded.
Industrial PLC Digital Input Protection	LED Driver Power Stage
Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring ESD and inductive kickback from solenoid coils. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-input line; absorbs ±2 kV contact ESD per IEC 61000-4-2 without latch-up. Use Value: Leakage <1 µA preserves high-impedance sensing integrity while enabling robust 10/1000 µs surge immunity up to 500 W.	Use Scenario: Protecting constant-current LED driver ICs (e.g., AL8863) from voltage spikes generated by long cable runs and relay switching in streetlight systems. IC Role / Device Role / Timing Role: Mounted across LED string input terminals to clamp transients before they overstress output-stage MOSFETs and current-sense resistors. Use Value: 175 °C T_J max allows placement near hot LED heatsinks without derating, maintaining full 500 W surge capacity at elevated ambient temperatures.

Automotive Battery Rail Protection

DC-DC Converter Input Stage

Use Scenario: Protecting 12 V battery-fed ECUs from load dump (ISO 7637-2 Pulse 5a) and alternator-induced surges.

IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp transients before they reach regulator ICs.

Use Value: Limits peak voltage to ≤179 V during 500 W surges, preventing damage to 36 V-rated input stages of buck controllers like LM5143A.

Use Scenario: Safeguarding isolated DC-DC converter primary-side MOSFET gates and controller ICs against coupling transients from high-di/dt switching nodes.

IC Role / Device Role / Timing Role: Placed across input bulk capacitor to suppress common-mode spikes induced by transformer leakage in flyback or forward topologies.

Use Value: Sub-1 ns response ensures clamping occurs before gate oxide breakdown thresholds (e.g., <200 V) of 650 V SiC MOSFET drivers are exceeded.

Industrial PLC Digital Input Protection

LED Driver Power Stage

Use Scenario: Shielding 24 V digital input channels in programmable logic controllers from field-wiring ESD and inductive kickback from solenoid coils.

IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-input line; absorbs ±2 kV contact ESD per IEC 61000-4-2 without latch-up.

Use Value: Leakage <1 µA preserves high-impedance sensing integrity while enabling robust 10/1000 µs surge immunity up to 500 W.

Use Scenario: Protecting constant-current LED driver ICs (e.g., AL8863) from voltage spikes generated by long cable runs and relay switching in streetlight systems.

IC Role / Device Role / Timing Role: Mounted across LED string input terminals to clamp transients before they overstress output-stage MOSFETs and current-sense resistors.

Use Value: 175 °C T_J max allows placement near hot LED heatsinks without derating, maintaining full 500 W surge capacity at elevated ambient temperatures.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SMAJ100A	Same DO-214AC package, 100 V V_WM, but bidirectional; V_C = 165 V @ 3.1 A; no AEC-Q101 qualification.	Supports bipolar transients (e.g., AC-coupled signals), but unsuitable for automotive qualification-critical designs.	Select SMAJ100A only for non-automotive industrial applications where bidirectional clamping and cost are prioritized over automotive reliability validation.
1.5KE100A	DO-201AD package, same 100 V V_WM, V_C = 165 V @ 3.1 A; 1.5 kW rating but larger footprint; no AEC-Q101.	Higher surge capacity (1.5 kW vs. 500 W) suits infrequent high-energy events, but larger size conflicts with space-constrained automotive layouts.	Choose 1.5KE100A when surge energy exceeds 500 W requirements and board area permits DO-201AD; avoid if AEC-Q101 or DO-15 form factor is mandatory.

Compared with SMAJ100A and 1.5KE100A, the SA100AH uniquely combines AEC-Q101 qualification, DO-204AC (DO-15) compactness, and guaranteed unidirectional performance - making it the only option among the three validated for automotive front-end protection where qualification, size, and polarity control are jointly required.

Availability

SA100AH is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and LED driver power stages requiring stable component supply with AEC-Q101 assurance and DO-15 form factor compatibility.

Supply support for SA100AH 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 Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in power devices, TVS diodes, rectifiers, and MOSFETs for automotive and industrial markets.

The SA Series was developed specifically for high-reliability transient suppression in automotive power distribution networks, emphasizing AEC-Q101 compliance, tight V_BR tolerance, and robust surge handling in standardized axial packages.

FAQ

What is the AEC-Q101 qualification status of the SA100AH?

The SA100AH is explicitly AEC-Q101 qualified, as confirmed in the ordering code suffix "H" and product documentation (Version L2105). This qualification covers temperature cycling, humidity bias, mechanical shock, and bond strength testing per JEDEC standards - validating its suitability for automotive under-hood and chassis-mounted applications where reliability is mission-critical. SA100AH must be specified with the "H" suffix to ensure AEC-Q101 compliance; standard SA100A is not qualified.

Does the SA100AH have bidirectional or unidirectional polarity?

The SA100AH is a unidirectional TVS diode, indicated by its single cathode band marking and specification of V_BR and V_C only for reverse-biased operation. Its datasheet confirms unidirectional behavior with fast response time <1.0 ps from 0 V to V_BR, and it is not rated for forward conduction beyond the specified 3.5 V instantaneous forward voltage at 35 A. Bidirectional variants in the SA Series use "CA" suffix (e.g., SA100CA), not "H".

What is the maximum clamping voltage of the SA100AH under standard surge conditions?

The SA100AH has a maximum clamping voltage (V_C) of 179 V when subjected to a 10/1000 µs waveform peak pulse current of 2.9 A, as specified in the "Maximum Ratings and Electrical Characteristics" table. This value represents the worst-case voltage imposed on protected circuitry during a 500 W transient event and is measured with the device mounted per JEDEC test conditions - critical for verifying margin against downstream component voltage ratings.

Can the SA100AH be used in place of the SA100A in automotive designs?

No - the SA100AH and SA100A are not interchangeable in automotive designs requiring AEC-Q101 qualification. While both share identical electrical parameters (V_WM = 100 V, V_BR = 111–136 V, V_C = 179 V), only the SA100AH carries the "H" suffix denoting full AEC-Q101 validation. Using SA100A in automotive applications risks non-compliance with OEM reliability requirements and may invalidate system-level qualification testing. SA100AH must be sourced explicitly.

What is the thermal derating behavior of the SA100AH above 25°C ambient?

The SA100AH's peak pulse power (P_PK) derates linearly above 25°C ambient, per Figure 2 in the datasheet: at 75°C, P_PK drops to ~350 W; at 125°C, it falls to ~180 W; and at 150°C, it is ~100 W. This derating applies to non-repetitive pulses and is based on junction temperature limits - meaning actual usable surge capacity depends on thermal mass, PCB copper area, and pulse repetition rate. For sustained high-temp operation, SA100AH's +175°C T_J max remains unchanged, but pulse energy must be reduced accordingly.

SA100AH Specifications

Product attributes: Attribute value

Manufacturer:: Taiwan Semiconductor Corporation

Package/Case:: DO-204AC, DO-15, Axial

Series:: SA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Type:: Zener

Unidirectional Channels:: 1

Bidirectional Channels:: -

Voltage - Reverse Standoff (Typ):: 100V

Voltage - Breakdown (Min):: 111V

Voltage - Clamping (Max) @ Ipp:: 162V

Current - Peak Pulse (10/1000µs):: 3.2A

Power - Peak Pulse:: 500W

Power Line Protection:: No

Applications:: -

Capacitance @ Frequency:: -

Operating Temperature:: -55°C ~ 175°C (TJ)

Grade:: Automotive

Qualification:: AEC-Q101

Mounting Type:: Through Hole

Supplier Device Package:: DO-204AC (DO-15)

SA100AH FAQ

1.How can I place an order for SA100AH through Aetrix?

Please submit a Request for Quotation (RFQ) for SA100AH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SA100AH reliable?

The price and inventory of SA100AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA100AH is usually 5 days.

3.What payment methods are accepted for SA100AH?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA100AH transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SA100AH?

SA100AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SA100AH order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SA100AH?

For technical support, including SA100AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA100AH requirements.

6.How does Aetrix verify that SA100AH is sourced from the original manufacturer or authorized distributors?

All SA100AH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SA100AH meets industry standards.

7.What is the process for return or replacement of SA100AH?

All SA100AH units undergo pre-shipment inspection (PSI). If there is an issue with SA100AH, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SA100AH part is unused and in its original packaging.

Return procedure for SA100AH:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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