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Taiwan Semiconductor Corporation SA43CA
- Part No.:
- SA43CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43CA.pdf
- Description:
- TVS DIODE 43VWM 69.4VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,205
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Product details
Overview
SA43CA from Taiwan Semiconductor is a bidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 43V working stand-off voltage (VWM), 47.8–58.4V breakdown voltage (VBR), and 76.7V maximum clamping voltage (VC) at 6.8A peak pulse current - designed for ESD and electrical fast transient protection in automotive lighting and power supply input stages.
For engineers reviewing the SA43CA datasheet, SA43CA pinout, SA43CA application, or SA43CA equivalent, this page delivers verified clamping performance, bidirectional surge response, RoHS/halogen-free compliance, AEC-Q101 qualification status, and direct replacement guidance for industrial and automotive circuit protection design.
Technical Context
The SA43CA is a silicon avalanche diode engineered for unidirectional or bidirectional transient suppression per IEC 61000-4-2 (ESD) and IEC 61000-4-4 (EFT). Its bidirectional configuration enables symmetrical clamping across both polarities without external polarity management.
It operates with <1μA reverse leakage at 43V, achieves clamping within 5ns response time, and sustains 500W peak pulse power at 10/1000μs waveform - validated under JEDEC JESD22-A114F test conditions and rated for junction temperatures up to +175°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous DC or RMS voltage the device blocks without conduction. |
| VBR (min/max) | 47.8 V / 58.4 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold tolerance. |
| VC @ IPPM | 76.7 V - Clamped voltage seen by protected circuit during 6.8 A 10/1000μs surge; determines safe overvoltage margin. |
| PPK | 500 W - Peak surge power handling capability under standardized 10/1000μs waveform; critical for lightning/EFT immunity. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in under-hood automotive environments and high-ambient industrial settings. |
| IR @ VWM | <1 μA - Reverse leakage at working voltage; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| 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
DO-204AC (DO-15) axial package with cathode band marking for unidirectional variants; SA43CA is bidirectional and has no polarity marking - terminals are functionally symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no PCB orientation dependency. |
| Leads (Tin-plated) | Interconnect interface | Solderable per J-STD-002; supports wave/reflow; meets JESD201 Class 2 whisker resistance for long-term reliability. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD stress - suitable for under-hood and body-control modules. |
| 5ns bidirectional response | Clamps transients before sensitive ICs experience overstress - critical for protecting CAN/LIN transceivers and microcontroller I/Os. |
| 76.7V clamping at 6.8A | Provides defined overvoltage ceiling during 10/1000μs surges - enables robust design margin against ISO 7637-2 Pulse 1/2/5a/b. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive - supports green manufacturing and end-of-life recycling requirements. |
| 175°C junction rating | Enables placement near heat sources (e.g., power MOSFETs, LED drivers) without derating concerns in sealed enclosures. |
Applications
| Automotive Lighting Systems | Industrial Power Supply Inputs |
|---|---|
|
Use Scenario: Protecting LED driver ICs and MOSFETs from load-dump and inductive switching transients in headlamp and tail lamp modules. IC Role / Device Role: Primary overvoltage clamp placed across DC input rails upstream of DC-DC converters. Use Value: Limits transient excursions to ≤76.7V, preventing latch-up or gate oxide damage in 40–60V-rated power semiconductors. |
Use Scenario: Safeguarding AC-DC and DC-DC converter front-ends against EFT bursts and surge events in factory automation PLCs. IC Role / Device Role: Secondary-level TVS deployed after common-mode chokes and before rectifier bridges. Use Value: Absorbs 500W surges without degradation, maintaining system uptime where EN 61000-4-4 Level 4 immunity is required. |
| Automotive Body Control Modules | Smart Building Sensor Nodes |
|
Use Scenario: Shielding LIN bus transceivers and microcontroller GPIOs from battery line disturbances during jump-start or alternator load dump. IC Role / Device Role: Bidirectional rail clamp tied between VBAT and GND, leveraging symmetry for polarity-agnostic protection. Use Value: Sub-5ns response ensures clamping activation before LIN physical layer tolerances (±18V) are exceeded. |
Use Scenario: Securing RS-485 transceivers and MCU reset lines in battery-powered occupancy sensors exposed to ESD in HVAC ducts. IC Role / Device Role: Localized point-of-use protection adjacent to connector entry points and I/O headers. Use Value: <1μA leakage preserves multi-year battery life while providing 15kV contact ESD immunity per IEC 61000-4-2. |
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 SMAJ43CA | Identical DO-204AC package, same 43V VWM and 500W rating, but higher VC = 77.4V; ±5% VBR tolerance vs. SA43CA's ±11%. | Validated for UL 497B telecom surge standards; less commonly used in automotive due to non-AEC-Q101 status. | Preferred where tighter VBR tolerance and UL certification are prioritized over automotive qualification. |
| ON Semiconductor 1.5SMC43CA | Same 43V VWM and DO-204AC package; 500W rating; VC = 76.7V identical; VBR min/max 47.8–58.4V matches SA43CA exactly. | Not AEC-Q101 qualified; rated only to +150°C TJ max (vs. +175°C for SA43CA); lower thermal margin in high-ambient designs. | Cost-effective alternative for non-automotive industrial use where extended temperature range is not required. |
Compared with SMAJ43CA and 1.5SMC43CA, the SA43CA offers AEC-Q101 qualification and +175°C junction rating - making it the sole choice for automotive under-hood applications requiring extended thermal resilience and automotive reliability validation.
Availability
SA43CA is available at Aetrix Electronics and suitable for automotive lighting systems, industrial power supply inputs, body control modules, and smart building sensor nodes requiring stable component supply and long-term lifecycle support.
Supply support for SA43CA 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 TVS diodes, rectifiers, and power devices since 1979.
The SA Series was developed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 compliance, wide VWM range (5–170V), and robust 500W surge capability in standard DO-15 packaging.
FAQ
What is the clamping voltage of the SA43CA under a 10/1000μs surge?
The SA43CA exhibits a maximum clamping voltage (VC) of 76.7 V when subjected to its rated peak pulse current of 6.8 A under the 10/1000μs waveform. This value is measured per IEC 61000-4-5 and defines the upper voltage limit imposed on protected circuitry during surge events - a key parameter for ensuring downstream components remain within safe operating area.
Is the SA43CA unidirectional or bidirectional?
The SA43CA is a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive and negative transients without polarity sensitivity. Its marking does not include a cathode band, and its electrical characteristics - including VBR and VC - apply identically in both directions, as confirmed in the SA Series datasheet Section 2.
Does the SA43CA meet AEC-Q101 reliability standards?
Yes, the SA43CA is explicitly AEC-Q101 qualified, as stated in the "FEATURES" section of the official Taiwan Semiconductor SA Series datasheet (Version L2105). This qualification covers stress tests including HTGB, H3TRB, TC, and ESD, validating its suitability for automotive electronic control units and lighting modules.
What is the maximum junction temperature rating for the SA43CA?
The SA43CA has a maximum junction temperature (TJ max) rating of +175°C, enabling reliable operation in high-ambient environments such as engine compartments, LED driver housings, and enclosed industrial power supplies. This exceeds the +150°C rating of many competing 500W TVS diodes, providing additional thermal design margin.
What package type does the SA43CA use, and are its leads lead-free?
The SA43CA uses the DO-204AC (DO-15) axial package with pure tin-plated leads that are fully RoHS compliant and solderable per J-STD-002. The molding compound meets UL 94V-0 flammability rating, and the device is halogen-free per IEC 61249-2-21 - confirming full environmental compliance for modern electronics assembly.
SA43CA 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA43CA FAQ
1.How can I place an order for SA43CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43CA 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 SA43CA reliable?
The price and inventory of SA43CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43CA is usually 5 days.
3.What payment methods are accepted for SA43CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43CA?
SA43CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43CA 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 SA43CA?
For technical support, including SA43CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43CA requirements.
6.How does Aetrix verify that SA43CA is sourced from the original manufacturer or authorized distributors?
All SA43CA 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 SA43CA meets industry standards.
7.What is the process for return or replacement of SA43CA?
All SA43CA units undergo pre-shipment inspection (PSI). If there is an issue with SA43CA, 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 SA43CA part is unused and in its original packaging.
Return procedure for SA43CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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