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Taiwan Semiconductor Corporation SA43C
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- Part No.:
- SA43C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43C.pdf
- Description:
- 500W, 53.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:2,051
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Product details
Overview
SA43C from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 43V working stand-off voltage (VWM), 47.8–58.4V breakdown voltage (VBR), and clamping voltage of 76.7V at 6.8A peak pulse current - used to protect automotive and industrial power rails against ESD and inductive switching transients.
For engineers reviewing the SA43C datasheet, SA43C pinout, SA43C application, or SA43C equivalent, this page delivers verified electrical parameters, DO-15 terminal polarity mapping, AEC-Q101 qualification status, clamping performance under standardized surge waveforms, and direct alternatives with documented VWM/VBR/PPK alignment.
Technical Context
The SA43C operates as a unidirectional avalanche diode, triggering conduction when reverse voltage exceeds its specified VBR range (47.8–58.4V @ 1mA). It exhibits low dynamic impedance during clamping, delivering 76.7V VC at 6.8A IPPM under 10/1000μs waveform, with <1.0ps response time from 0V to VBR.
Its thermal design supports operation from −55°C to +175°C junction temperature, with steady-state power dissipation of 3W at TL = 75°C on 10×10 mm copper pads. The device uses pure tin-plated leads compliant with J-STD-002 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 47.8 / 58.4 V @ 1 mA - guaranteed avalanche onset window defining turn-on threshold tolerance |
| VC @ IPPM | 76.7 V @ 6.8 A - clamped voltage during 10/1000μs surge, directly limiting downstream IC stress |
| PPK | 500 W - peak pulse power handling per single non-repetitive 10/1000μs transient |
| IR @ VWM | <1 μA - negligible leakage current at rated stand-off voltage, minimizing standby power loss |
| TJ max | +175 °C - extended junction temperature rating enabling under-hood automotive deployment |
| Package | DO-204AC (DO-15) - industry-standard axial leaded package with cathode band marking |
Pinout & Package
DO-204AC (DO-15) package with axial leads; cathode indicated by molded band. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 43V rail); conducts when reverse voltage exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| 500W surge rating at 10/1000μs | Enables robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges without derating |
| <1.0 ps response time (0V → VBR) | Clamps faster than most semiconductor switching events, preventing voltage overshoot damage to sensitive inputs |
| AEC-Q101 qualified option available | Validated for automotive powertrain and body electronics per stress test requirements (HTOL, TCT, ESD, etc.) |
| RoHS & halogen-free (IEC 61249-2-21) | Complies with EU environmental directives and enables use in green manufacturing supply chains |
| UL 94V-0 molding compound | Self-extinguishing encapsulant meets flammability safety standards for enclosed industrial modules |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 42V battery-connected ECUs from load dump and alternator transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and DC-DC input stage to clamp spikes above 43V. Use Value: Limits peak voltage to ≤76.7V during 500W surges, preserving input MOSFETs and controller ICs rated for 80V absolute max. | Use Scenario: Shielding 24V digital input terminals of programmable logic controllers from field-wiring EFT and inductive kickback. IC Role / Device Role / Timing Role: Standoff protection element mounted at connector entry point, shunting transients to chassis ground. Use Value: Sub-1μA leakage avoids false triggering of optocoupler inputs; fast <1.0ps response prevents microsecond-scale overvoltage propagation. |
| LED Driver Overvoltage Clamp | Motor Control Board Surge Suppression |
Use Scenario: Safeguarding constant-current LED driver ICs against voltage reversal and surge coupling from adjacent AC lines. IC Role / Device Role / Timing Role: Reverse-biased across driver output to clamp negative excursions and positive transients exceeding VWM. Use Value: 76.7V clamping ensures driver ICs with 85V max rating remain within safe operating area during 10/1000μs lightning-induced surges. | Use Scenario: Protecting gate drivers and current-sense amplifiers on BLDC motor control boards from MOSFET switching noise and back-EMF spikes. IC Role / Device Role / Timing Role: Mounted across half-bridge high-side supply rail to absorb inductive energy during PWM transitions. Use Value: 500W peak power rating sustains repeated 6.8A surge currents without thermal runaway, supporting >100k-cycle reliability in factory automation systems. |
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 SMAJ43A | VWM = 43V, VBR = 47.8–52.8V, VC = 69.4V @ 7.5A, same DO-214AC package | Lower clamping voltage but higher IPPM; not AEC-Q101 qualified in standard grade | Select when lower VC is critical and automotive qualification is not required |
| ON Semiconductor 1.5SMC43C | VWM = 43V, VBR = 47.8–52.8V, VC = 69.4V @ 7.5A, DO-214AB package (larger footprint) | Same electrical specs but different mechanical form factor; requires PCB layout change | Select when higher surge margin is needed and board space allows larger SMC package |
Compared with SMAJ43A and 1.5SMC43C, the SA43C offers identical VWM/VBR alignment and superior thermal robustness (+175°C TJ max), while maintaining DO-15 compatibility for legacy through-hole designs where lead pitch and mounting height are constrained.
Availability
SA43C is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC I/O modules, LED lighting drivers, and motor control boards requiring stable component supply and long-term lifecycle support.
Supply support for SA43C 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 management, protection, and signal conditioning devices.
The SA Series TVS diodes are engineered for high-reliability transient suppression in harsh environments - targeting automotive, industrial automation, and transportation systems where surge immunity and thermal stability are mission-critical.
FAQ
What is the clamping voltage of SA43C and how is it measured?
The SA43C has a maximum clamping voltage (VC) of 76.7 V, measured at 6.8 A peak pulse current (IPPM) under the standardized 10/1000 μs double-exponential surge waveform. This value is guaranteed per the datasheet's electrical characteristics table and reflects the voltage seen by downstream circuitry during worst-case transient events - critical for ensuring protected ICs remain within their absolute maximum ratings.
Is SA43C unidirectional or bidirectional, and how is polarity marked?
The SA43C is a unidirectional TVS diode, with polarity indicated by a cathode band on the DO-204AC (DO-15) package body. The cathode must be connected toward the protected line (e.g., 43V rail), and the anode to reference ground or return path. Bidirectional variants carry "CA" suffix (e.g., SA43CA), which SA43C does not.
Does SA43C meet AEC-Q101 qualification, and what does that mean for automotive use?
SA43C itself is not AEC-Q101 qualified; however, the SA43CH variant (with "H" suffix) is explicitly qualified per AEC-Q101. That qualification includes HTOL, temperature cycling, ESD, and mechanical stress testing - validating suitability for automotive powertrain, chassis, and body electronics where reliability under thermal and vibration stress is mandatory.
What is the maximum junction temperature and thermal derating behavior of SA43C?
The SA43C has a maximum junction temperature (TJ max) of +175°C and follows a defined pulse derating curve (Fig.2 in datasheet): peak pulse power decreases linearly above TA = 25°C, reaching ~50% of 500W at 100°C ambient. Its 3W steady-state power rating applies only when mounted on 10×10 mm copper pads at TL = 75°C - essential for thermal design in enclosed enclosures.
How does SA43C compare to SA43A in terms of breakdown voltage and clamping performance?
The SA43C has a VBR range of 47.8–58.4 V and clamps at 76.7 V @ 6.8 A, whereas SA43A has tighter VBR (47.8–52.8 V) and lower VC (69.4 V @ 7.5 A). SA43A achieves better clamping but trades off higher test current and slightly reduced surge margin - making SA43C preferable where broader VBR tolerance and higher energy absorption are prioritized over minimal VC.
SA43C 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 6.8A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA43C FAQ
1.How can I place an order for SA43C through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43C 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 SA43C reliable?
The price and inventory of SA43C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43C is usually 5 days.
3.What payment methods are accepted for SA43C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43C?
SA43C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43C 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 SA43C?
For technical support, including SA43C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43C requirements.
6.How does Aetrix verify that SA43C is sourced from the original manufacturer or authorized distributors?
All SA43C 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 SA43C meets industry standards.
7.What is the process for return or replacement of SA43C?
All SA43C units undergo pre-shipment inspection (PSI). If there is an issue with SA43C, 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 SA43C part is unused and in its original packaging.
Return procedure for SA43C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA43C Tags
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