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Taiwan Semiconductor Corporation SA12C
- Part No.:
- SA12C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA12C.pdf
- Description:
- 500W, 14.8V, BIDIRECTIONAL, TVS
- Quantity:
- Payment:
- Shipping:
Inventory:9,545
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Product details
Overview
SA12C from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 13.3–16.3V breakdown voltage (VBR), 12V working stand-off voltage (VWM), and 22.0V maximum clamping voltage (VC) at 23A peak pulse current - designed for automotive-grade ESD and inductive load transient protection in power supply rails and signal lines.
For engineers reviewing the SA12C datasheet, SA12C pinout, SA12C application, or SA12C equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under 10/1000μs surge, and real-world use cases in lighting drivers and automotive control modules.
Technical Context
The SA12C operates as a unidirectional avalanche diode with cathode-band polarity marking, triggering conduction when reverse voltage exceeds VBR (min 13.3V, max 16.3V at 1mA test current) and clamping transients to ≤22.0V at 23A IPPM. Its low dynamic impedance enables fast energy diversion during EFT or load-dump events.
It meets AEC-Q101 stress requirements for automotive applications, supports operating junction temperatures from –55°C to +175°C, and exhibits <1μA reverse leakage at 12V - ensuring minimal standby power loss in always-on circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below breakdown. |
| VBR @ IT=1mA | 13.3–16.3 V - Breakdown voltage range confirming reliable turn-on threshold across production lot. |
| VC @ IPPM=23A | 22.0 V - Clamped voltage during 10/1000μs surge; determines protected circuit's maximum transient exposure. |
| PPK | 500 W - Peak pulse power handling per single non-repetitive event; validates robustness against ISO 7637-2 Pulse 1/2a/5a. |
| IR @ VWM | <1 μA - Reverse leakage at stand-off voltage; ensures negligible quiescent current in battery-backed systems. |
| TJMAX | +175 °C - Maximum junction temperature; supports under-hood placement without derating in automotive ECUs. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads, UL 94V-0 molding, and JESD201 Class 2 whisker resistance. |
Pinout & Package
SA12C uses a two-terminal DO-204AC (DO-15) package with axial leads. Polarity is marked by a cathode band on the body; the banded end is the cathode (K), and the unmarked end is the anode (A). Leads are pure tin-plated and solderable per J-STD-002.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward current entry / reverse voltage reference | Connected to lower-potential node (e.g., ground or return path); defines directionality of clamping action. |
| Cathode (banded end) | Reverse voltage sensing / surge current sink | Connected to protected line (e.g., 12V rail); conducts avalanche current to ground during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, lighting, and ADAS subsystems. |
| 500W peak pulse power (10/1000μs) | Withstands high-energy transients like ISO 7637-2 Pulse 5a (load dump) without degradation or thermal runaway. |
| Clamping voltage ≤22.0V at 23A | Ensures downstream ICs rated for 24V operation remain within absolute maximum ratings during surge events. |
| Fast response time <1.0 ps | Activates before sensitive logic or analog circuitry can be damaged - critical for protecting CAN/LIN bus transceivers and microcontrollers. |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with global environmental regulations and enables use in consumer, industrial, and automotive supply chains without material compliance risk. |
Applications
| Automotive Lighting Systems | Industrial PLC I/O Protection |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFET gate drivers from inductive kickback during headlamp switching. IC Role / Device Role: Unidirectional TVS placed between 12V supply rail and ground, shunting flyback energy from relay coils and solenoids. Use Value: Limits transient voltage to ≤22.0V, preventing latch-up or gate oxide damage in 24V-rated drivers while maintaining <1μA leakage in sleep mode. |
Use Scenario: Safeguarding digital input channels of programmable logic controllers against EFT bursts and field-wiring surges. IC Role / Device Role: Standoff-clamp TVS on 24V DC input lines, absorbing 10/1000μs pulses up to 500W without failure. Use Value: Enables EN 61000-4-4 Level 4 immunity (4 kV) without additional filtering, reducing BOM count and board space. |
| Automotive Body Control Modules | DC Power Supply Input Protection |
|
Use Scenario: Securing microcontroller GPIOs and LIN transceivers in door module ECUs exposed to battery disconnect/load dump events. IC Role / Device Role: Primary clamping device on VBAT line upstream of LDO regulators, rated for AEC-Q101 temperature and life stress. Use Value: Survives repeated 12V load dump pulses (ISO 7637-2 Pulse 5a) with no parameter shift, ensuring long-term functional safety compliance. |
Use Scenario: Protecting AC/DC adapter secondary-side outputs and DC-DC converter inputs from cross-coupled transients and ESD. IC Role / Device Role: Unidirectional TVS on 12V or 24V output rails, providing low-leakage, high-power clamping adjacent to connector interfaces. Use Value: Maintains system uptime by preventing brownouts or reset events caused by transient-induced voltage sags or spikes. |
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 SMAJ12A | Unidirectional, DO-214AC (SMA) package, VBR = 13.3–14.7V, VC = 19.9V @ 26.3A, PPK = 400W | Lower clamping voltage but 100W less peak power; SMA package requires different footprint and has higher thermal resistance. | Select when tighter clamping is prioritized over surge energy handling and PCB layout allows SMA footprint. |
| ON Semiconductor 1.5SMC12A | Unidirectional, DO-214AB (SMC) package, VBR = 13.3–14.7V, VC = 19.9V @ 26.3A, PPK = 1500W | Higher surge rating (1500W) and larger SMC package; significantly higher thermal mass and cost. | Select when system-level surge testing exceeds 500W (e.g., ISO 16750-2 Class D) and board space permits larger SMC outline. |
Compared with SMAJ12A and 1.5SMC12A, the SA12C offers balanced 500W surge capability in the compact DO-15 form factor with AEC-Q101 qualification - making it optimal for space-constrained automotive modules where 1500W rating is unnecessary and SMA footprint adaptation is undesirable.
Availability
SA12C is available at Aetrix Electronics and suitable for automotive lighting systems, industrial PLC I/O protection, and body control module designs requiring stable component supply, AEC-Q101 compliance, and DO-15 through-hole compatibility.
Supply support for SA12C 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 - headquartered in Hsinchu, Taiwan, with global distribution and AEC-Q101 certified production lines.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing high surge robustness, low clamping voltage, and qualification to AEC-Q101 - targeting replacement of legacy 1N6267-style TVS diodes with improved consistency and reliability.
FAQ
What is the polarity configuration of the SA12C?
The SA12C is a unidirectional TVS diode with clearly marked cathode polarity: a band on the body identifies the cathode terminal, which must be connected to the protected line (e.g., 12V rail), while the unmarked end is the anode, tied to ground. This configuration ensures clamping only during reverse overvoltage events - critical for correct integration into DC power rails and signal paths.
Does the SA12C meet AEC-Q101 qualification?
Yes, the SA12C is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's official documentation and ordering code suffix "H" (e.g., SA12CH). It undergoes full stress testing including temperature cycling, high-temperature reverse bias (HTRB), and ESD per AEC-Q101 Rev D, making it suitable for automotive powertrain, chassis, and body electronics applications.
What is the maximum clamping voltage of the SA12C under surge conditions?
The SA12C has a maximum clamping voltage (VC) of 22.0 V at 23 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is guaranteed across the full operating temperature range and ensures protected downstream components - such as 24V-rated microcontrollers or CAN transceivers - remain within their absolute maximum voltage ratings during transient events.
Can the SA12C replace older 1N6267-series TVS diodes?
Yes, the SA12C is a direct functional and mechanical replacement for 1N6267 (12V variant) - sharing the same DO-204AC (DO-15) package, unidirectional polarity, and comparable VBR/VC specs. It improves upon legacy parts with AEC-Q101 qualification, tighter parameter distribution, and enhanced surge lifetime - requiring no PCB changes when upgrading existing designs.
What is the reverse leakage current of the SA12C at its working voltage?
The SA12C exhibits a maximum reverse leakage current (IR) of 1 μA at its 12 V working stand-off voltage (VWM), measured at 25°C. This ultra-low leakage ensures minimal power drain in always-on automotive circuits - such as alarm systems or telematics modules - and maintains signal integrity in high-impedance sensor interfaces.
SA12C 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:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 22V
- Current - Peak Pulse (10/1000µs):
- 23A
- 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)
SA12C FAQ
1.How can I place an order for SA12C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA12C 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 SA12C reliable?
The price and inventory of SA12C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA12C is usually 5 days.
3.What payment methods are accepted for SA12C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA12C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA12C?
SA12C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA12C 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 SA12C?
For technical support, including SA12C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA12C requirements.
6.How does Aetrix verify that SA12C is sourced from the original manufacturer or authorized distributors?
All SA12C 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 SA12C meets industry standards.
7.What is the process for return or replacement of SA12C?
All SA12C units undergo pre-shipment inspection (PSI). If there is an issue with SA12C, 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 SA12C part is unused and in its original packaging.
Return procedure for SA12C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA12C Tags
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