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Taiwan Semiconductor Corporation SA43CAH
- Part No.:
- SA43CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43CAH.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,959
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Product details
Overview
SA43CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, with 43V working stand-off voltage, 47.8–58.4V breakdown voltage, and 76.7V maximum clamping voltage at 6.8A peak pulse current - used for ESD and EFT protection in automotive lighting and power supply interfaces.
For engineers reviewing the SA43CAH datasheet, SA43CAH pinout, SA43CAH application, or SA43CAH equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, DO-15 mechanical data, and real-world protection use cases without generic assumptions.
Technical Context
The SA43CAH is a silicon avalanche diode designed for bidirectional transient suppression, meeting IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 surge immunity requirements. Its symmetrical VBR min/max (47.8–58.4V) and low clamping ratio (VC/VBR ≈ 1.39) ensure consistent overvoltage limiting in both polarities.
It operates across –55°C to +175°C junction temperature range, supports 1μA reverse leakage at 43V, and exhibits <5.0ns response time - enabling robust protection of CAN, LIN, and sensor signal lines in automotive ECUs where fast transients and thermal cycling are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous DC or RMS voltage the device blocks without clamping |
| VBR @ IT=1mA | 47.8–58.4 V - Breakdown initiates within this range, defining turn-on threshold for transient suppression |
| VC @ IPPM=6.8A | 76.7 V - Clamped voltage during 10/1000μs surge; limits downstream IC stress to ≤76.7V |
| PPK | 500 W - Peak pulse power handling per single non-repetitive 10/1000μs waveform |
| IR @ VWM | <1 μA - Negligible leakage at operating voltage, minimizing standby power loss |
| TJ max | +175 °C - Enables placement near hot components (e.g., power MOSFETs, LED drivers) in under-hood modules |
| Response time | <5.0 ns - Fast enough to clamp ESD events before sensitive gate oxides fail |
Pinout & Package
SA43CAH uses the DO-204AC (DO-15) axial-leaded package with cathode band marking omitted due to bidirectional symmetry; terminals are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional avalanche junction | No polarity marking required; identical clamping behavior in either direction |
| Lead 1 | Terminal A | Connects to protected line (e.g., CAN_H); forms one side of differential transient path |
| Lead 2 | Terminal B | Connects to reference (e.g., CAN_L or chassis ground); completes bidirectional clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress per AEC standard |
| Bidirectional clamping | Enables single-device protection of differential buses (e.g., CAN, RS-485) without polarity concerns |
| Low clamping voltage (76.7V) | Keeps protected ICs (e.g., TJA1042, SN65HVD230) within safe absolute maximum ratings during ISO 7637-2 Pulse 1/2a |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for environmentally constrained automotive supply chains |
| UL 94V-0 molding compound | Prevents flame propagation in high-energy fault conditions inside enclosed ECU housings |
Applications
| Automotive CAN Bus Protection | LED Headlamp Driver Output Protection |
|---|---|
Use Scenario: Protecting CAN transceivers (e.g., TJA1055T) against load dump-induced surges and ESD coupling on vehicle wiring harnesses. IC Role / Device Role: Bidirectional TVS placed across CAN_H/CAN_L differential pair to clamp common-mode transients. Use Value: Limits voltage excursion to ≤76.7V during ISO 7637-2 Pulse 1 (–150V, 50Ω), preventing transceiver latch-up or permanent damage. | Use Scenario: Safeguarding constant-current LED driver outputs (e.g., AL8863) from inductive kickback when driving high-power headlamp arrays. IC Role / Device Role: Unidirectional or bidirectional TVS connected between driver output and ground to absorb flyback energy. Use Value: Absorbs 500W peak pulses from relay switching or short-circuit interruption, maintaining LED driver integrity over 10,000+ cycles. |
| Industrial Sensor Signal Line Protection | Power Supply Input Surge Suppression |
Use Scenario: Shielding analog sensor inputs (e.g., pressure sensors in engine manifolds) from EFT bursts induced by nearby solenoid actuation. IC Role / Device Role: SA43CAH placed between signal line and ground to shunt fast transients (<5ns) before reaching ADC front-end. Use Value: With ≤1μA leakage at 43V, it avoids signal offset drift while clamping 4kV EFT bursts per IEC 61000-4-4 Level 4. | Use Scenario: Front-end protection of 48V automotive auxiliary supplies against load dump surges up to +60V for 400ms. IC Role / Device Role: TVS configured in parallel with input capacitor to clamp overvoltage before DC-DC converter input stage. Use Value: Handles 500W peak power at 10/1000μs, reducing need for oversized input capacitors and enabling compact 48V-to-5V buck designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43CA | Same 43V VWM, 500W rating, but SMA package (surface-mount); lower thermal resistance to PCB | Requires rework for through-hole vs. SMT layout; better suited for space-constrained PCBs | Select SMAJ43CA only if board design supports SMT and thermal management via copper pour is feasible |
| P6SMB43CA | Identical DO-204AC package and 43V rating, but rated for 600W PPK and higher IPPM (7.3A) | Higher surge margin allows longer lifetime in high-cycle industrial motor drives | Choose P6SMB43CA when system-level testing shows repeated exposure to >500W transients |
Compared with SMAJ43CA and P6SMB43CA, SA43CAH offers AEC-Q101 qualification out-of-box, DO-15 through-hole mechanical robustness for high-vibration environments, and tighter VBR tolerance (±11%) - making it preferred for production automotive modules where qualification traceability and mounting reliability are mandatory.
Availability
SA43CAH is available at Aetrix Electronics and suitable for automotive lighting control, CAN bus interface protection, and 48V power supply surge suppression requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SA43CAH 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 automotive-qualified components since 1979.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in automotive subsystems - emphasizing high-temperature stability, repeatable clamping performance, and mechanical ruggedness in DO-15 packaging.
FAQ
What does the "H" suffix in SA43CAH signify?
The "H" suffix in SA43CAH indicates full AEC-Q101 qualification per Rev D test requirements, including stress tests for high-temperature reverse bias, temperature cycling, and ESD robustness. SA43CAH is not just a standard SA43CA part with a label change - it undergoes additional screening and lot-level validation to meet automotive reliability standards, unlike non-H variants.
Is SA43CAH unidirectional or bidirectional, and how is polarity marked?
SA43CAH is a bidirectional TVS diode, meaning it clamps transients of either polarity symmetrically. It has no cathode band or polarity marking - both leads are functionally identical. This eliminates orientation errors during manual assembly and enables direct placement across differential signal pairs like CAN_H/CAN_L without concern for terminal assignment.
What is the maximum clamping voltage of SA43CAH under standardized surge conditions?
The maximum clamping voltage of SA43CAH is 76.7 V, measured at 6.8 A peak pulse current using the 10/1000 μs double-exponential waveform per IEC 61000-4-5. This value is guaranteed across the full operating temperature range (–55°C to +175°C) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SA43CAH be used in place of SA43A in an existing design?
SA43CAH and SA43A share identical electrical specifications (VWM = 43 V, VBR = 47.8–58.4 V, VC = 76.7 V), but SA43CAH adds AEC-Q101 qualification and stricter lot-level testing. Substituting SA43CAH for SA43A is electrically safe and improves reliability in automotive applications - however, qualification documentation and PPAP submission must reflect the "H" variant's certified test reports.
Does SA43CAH meet halogen-free and RoHS requirements for automotive supply chains?
Yes, SA43CAH complies with both RoHS Directive 2011/65/EU and halogen-free requirements per IEC 61249-2-21. The molding compound is UL 94V-0 rated, and lead finishes use pure tin plating per J-STD-002 - satisfying Tier 1 automotive supplier material declarations and IMDS reporting requirements without exception.
SA43CAH 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:
- 69.4V
- Current - Peak Pulse (10/1000µs):
- 7.5A
- 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)
SA43CAH FAQ
1.How can I place an order for SA43CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43CAH 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 SA43CAH reliable?
The price and inventory of SA43CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43CAH is usually 5 days.
3.What payment methods are accepted for SA43CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43CAH?
SA43CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43CAH 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 SA43CAH?
For technical support, including SA43CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43CAH requirements.
6.How does Aetrix verify that SA43CAH is sourced from the original manufacturer or authorized distributors?
All SA43CAH 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 SA43CAH meets industry standards.
7.What is the process for return or replacement of SA43CAH?
All SA43CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA43CAH, 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 SA43CAH part is unused and in its original packaging.
Return procedure for SA43CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA43CAH Tags
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