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Taiwan Semiconductor Corporation SA100A
- Part No.:
- SA100A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA100A.pdf
- Description:
- TVS DIODE 100VWM 162VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,450
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Product details
Overview
SA100A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 100 V working stand-off voltage, 111–123 V breakdown voltage at 1 mA test current, 162 V clamping voltage at 3.2 A peak pulse current, and 500 W surge capability per 10/1000 μs waveform. It protects automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the SA100A datasheet, SA100A pinout, SA100A application, or SA100A equivalent, this page delivers verified electrical parameters, clamping behavior under standardized surge conditions, thermal derating curves, polarity marking guidance, and AEC-Q101-qualified alternatives for automotive-grade system protection design.
Technical Context
The SA100A operates as a unidirectional avalanche diode with fast response time (<1.0 ps from 0 V to VBR) and low dynamic impedance, enabling effective suppression of sub-microsecond transients such as ESD and electrical fast transients (EFT). Its 100 V VWM rating ensures compatibility with 80–100 V DC bus systems.
Designed for non-repetitive surge events, it delivers 500 W peak pulse power at TA = 25°C, derating linearly above that temperature per Fig.2, with maximum junction temperature of +175°C and storage range from –55°C to +175°C. Reverse leakage is limited to ≤1 μA at 100 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 100 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 80–100 V nominal systems. |
| VBR @ IT = 1 mA | 111–123 V - Breakdown voltage range at 1 mA test current; ensures reliable turn-on during overvoltage events without premature conduction. |
| VC @ IPPM = 3.2 A | 162 V - Clamping voltage measured at 3.2 A peak pulse current (10/1000 μs); limits downstream voltage stress during surge. |
| PPK | 500 W - Peak pulse power rating at TA = 25°C; supports robust immunity to ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IR @ VWM | ≤1 μA - Reverse leakage current at 100 V; minimizes standby power loss and avoids false triggering in high-impedance circuits. |
| TJMAX | +175°C - Maximum junction temperature; enables operation in under-hood automotive environments and industrial enclosures. |
Pinout & Package
SA100A uses the DO-204AC (DO-15) axial-leaded package with cathode band marking for unidirectional polarity. Leads are pure tin plated and solderable per J-STD-002. Weight ≈ 0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; forms current sink during clamping event. |
| Cathode (banded end) | High-side connection point | Connected to protected line (e.g., 12 V/24 V/48 V rail); blocks reverse current until VBR exceeded. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional TVS architecture | Enables asymmetric protection on positive-rail systems while blocking reverse conduction up to –100 V. |
| AEC-Q101 qualified variant available (SA100AH) | Validated for automotive applications including engine control units, body electronics, and ADAS power supplies. |
| Clamping ratio VC/VBR ≈ 1.34 | Indicates low dynamic impedance and efficient energy diversion-critical for protecting sensitive gate drivers and microcontrollers. |
| UL 94V-0 molding compound | Ensures flame-retardant housing suitable for enclosed industrial and transportation equipment meeting safety standards. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 24 V CAN power supply lines in vehicle ECUs from load dump and ISO 7637-2 transients. IC Role / Device Role / Timing Role: Standoff-clamp TVS device placed between VBAT and GND, conducting only during overvoltage events. Use Value: Limits voltage seen by downstream DC/DC converters and CAN transceivers to ≤162 V, preventing latch-up or permanent damage. | Use Scenario: Shielding digital input channels of programmable logic controllers from field-wiring induced surges and EFT bursts. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on 24 V sensor interface lines before optocoupler or Schmitt trigger input stage. Use Value: Maintains signal integrity by clamping transients within 1.0 ps, ensuring no false edge detection or controller reset. |
| LED Driver Overvoltage Clamp | Motor Drive Snubber Protection |
Use Scenario: Safeguarding constant-current LED driver ICs in streetlight systems exposed to lightning-induced surges on AC mains input. IC Role / Device Role / Timing Role: Parallel-connected unidirectional TVS across bulk capacitor input to absorb 500 W 10/1000 μs pulses. Use Value: Prevents overvoltage failure of MOSFETs and current-sense amplifiers by limiting peak input voltage to 162 V. | Use Scenario: Suppressing inductive kickback from brushed DC motors in factory automation actuators. IC Role / Device Role / Timing Role: Bidirectional clamping is not required; SA100A used in unidirectional configuration across motor terminals referenced to chassis ground. Use Value: Absorbs 3.2 A peak surge current with <1.0 ps response, reducing voltage overshoot below MOSFET VDSS rating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ100A | Same DO-204AC package, identical 100 V VWM, but higher VC = 169 V at 3.2 A and lower PPK = 400 W. | Suitable for less severe surge environments; not AEC-Q101 qualified unless specified as SMAJ100AH. | Select when cost sensitivity outweighs need for full 500 W rating or automotive qualification. |
| Vishay 1.5KE100A | Higher power (1500 W), larger DO-201AD package, same VWM/VBR range, but slower response (~1 ns) and higher leakage (≤5 μA). | Used where board space allows larger footprint and higher surge margin is prioritized over speed or leakage. | Choose for legacy designs requiring proven 1.5 kW surge handling, not for space-constrained or ultra-low-leakage applications. |
Compared with SMAJ100A and 1.5KE100A, SA100A offers optimal balance of compact DO-15 form factor, 500 W rating, sub-picosecond response, and ≤1 μA leakage-making it preferred for modern automotive and high-density industrial PCBs where layout area and precision clamping are critical.
Availability
SA100A is available at Aetrix Electronics and suitable for automotive ECU protection, industrial PLC input conditioning, LED driver overvoltage clamp, and motor drive snubber applications requiring stable component supply and consistent surge performance.
Supply support for SA100A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 validation capabilities.
The SA Series was developed specifically for high-reliability transient suppression in automotive and industrial power systems, emphasizing low clamping ratio, fast response, and robust thermal performance in standard axial packages.
FAQ
What is the maximum clamping voltage of SA100A under standard 10/1000 μs surge conditions?
The SA100A has a maximum clamping voltage (VC) of 162 V when subjected to a 3.2 A peak pulse current with a 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and reflects the actual voltage imposed on protected circuitry during worst-case transient events. The SA100A maintains this clamping performance across its specified operating temperature range.
Is SA100A suitable for automotive applications requiring AEC-Q101 qualification?
The base SA100A is not AEC-Q101 qualified; however, the SA100AH variant-identical in electrical specs and DO-204AC packaging-is explicitly qualified per AEC-Q101. For automotive use, SA100AH must be selected. SA100A remains appropriate for industrial and commercial applications where qualification is not mandated.
How does the SA100A differ from the bidirectional SA100CA in terms of circuit implementation?
The SA100A is unidirectional and requires correct polarity placement (cathode to protected line), whereas SA100CA provides symmetrical clamping for AC or floating-bus applications. SA100A offers lower leakage (<1 μA) and faster response (<1.0 ps) than SA100CA (5.0 ns), making it preferable for DC rail protection where polarity is fixed and speed is critical.
What is the thermal derating behavior of SA100A above 25°C ambient temperature?
SA100A's peak pulse power rating decreases linearly above 25°C ambient, following the derating curve in Fig.2 of the datasheet. At 75°C ambient, its PPK drops to approximately 350 W; at 125°C, it falls to ~200 W. This behavior must be accounted for in thermally constrained enclosures or under-hood automotive deployments.
Can SA100A be used in parallel to increase surge current handling capacity?
No-SA100A should not be paralleled due to mismatch in VBR tolerance (111–123 V) and dynamic impedance, which causes uneven current sharing and potential thermal runaway. For higher current handling, select a single higher-rated device (e.g., SA110A or SA120A) or consult TSC's application notes on staged protection topologies.
SA100A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA100A FAQ
1.How can I place an order for SA100A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA100A 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 SA100A reliable?
The price and inventory of SA100A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA100A is usually 5 days.
3.What payment methods are accepted for SA100A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA100A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA100A?
SA100A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA100A 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 SA100A?
For technical support, including SA100A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA100A requirements.
6.How does Aetrix verify that SA100A is sourced from the original manufacturer or authorized distributors?
All SA100A 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 SA100A meets industry standards.
7.What is the process for return or replacement of SA100A?
All SA100A units undergo pre-shipment inspection (PSI). If there is an issue with SA100A, 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 SA100A part is unused and in its original packaging.
Return procedure for SA100A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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