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Taiwan Semiconductor Corporation SA43CH
- Part No.:
- SA43CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43CH.pdf
- Description:
- 500W, 53.1V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:3,060
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Product details
Overview
SA43CH from Taiwan Semiconductor is a unidirectional 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 @ 1mA), and 76.7V maximum clamping voltage (VC) at 6.8A peak pulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SA43CH datasheet, SA43CH pinout, SA43CH application, or SA43CH equivalent, this AEC-Q101 qualified TVS offers verified clamping performance under 10/1000μs surge waveforms, low leakage (<1μA @ 43V), and robust junction temperature range (−55°C to +175°C) for under-hood and industrial control environments.
Technical Context
The SA43CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR threshold (min 47.8V, max 58.4V at 1mA test current), clamping transients to ≤76.7V at 6.8A. Its fast response time (<1.0ps from 0V to VBR) ensures protection of downstream ICs before damage occurs.
Designed for single-polarity DC circuits, it features pure tin-plated leads compliant with J-STD-002, UL 94V-0 molding compound, and meets JESD201 Class 2 whisker resistance - confirming suitability for automotive PCB assembly and high-reliability industrial use.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before conduction begins; sets safe margin below system rail voltage. |
| VBR @ IT=1mA | 47.8–58.4 V - Breakdown voltage range defining turn-on threshold; tight tolerance enables predictable clamping onset. |
| VC @ IPPM=6.8A | 76.7 V - Clamped voltage during 10/1000μs surge; limits stress on protected ICs to safe levels. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; defines single-event surge energy handling capability. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off voltage; ensures minimal standby power loss and signal integrity. |
| TJ max | +175 °C - Maximum junction temperature; supports operation in high-ambient under-hood automotive locations. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with 0.400g mass; compatible with automated through-hole insertion and reflow. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode indicated by band-marked end; anode is unmarked lead. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked lead) | Forward current entry / reference node | Connected to system ground or low-side return path; establishes reference for clamping action. |
| Cathode (banded lead) | Reverse-biased surge input / protected line connection | Connected to protected line (e.g., 48V rail); conducts surge current to ground when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS power domains. |
| 500W 10/1000μs surge rating | Withstands ISO 7637-2 Pulse 1, 2a, 3a/b, and IEC 61000-4-5 Level 4 surges without degradation. |
| <1.0ps response time | Enables sub-nanosecond clamping onset - faster than most microcontrollers' ESD immunity thresholds. |
| UL 94V-0 flammability rating | Molding compound self-extinguishes within 10 seconds after flame removal; required for automotive cabin and battery systems. |
| Halogen-free per IEC 61249-2-21 | Complies with RoHS and automotive ELV directives; eliminates corrosive halogen emissions during thermal events. |
Applications
| Automotive Power Rail Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 48V battery management system (BMS) monitoring circuits from load dump transients up to 60V. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between BMS analog front-end inputs and chassis ground. Use Value: Limits transient voltage to ≤76.7V, preventing latch-up or gate oxide rupture in precision ADCs and op-amps. | Use Scenario: Safeguarding 24V DC digital input modules in programmable logic controllers against inductive kickback from solenoid coils. IC Role / Device Role / Timing Role: Standoff protector on field-side input terminals, absorbing 500W surges without requiring active circuitry. Use Value: Eliminates need for external RC snubbers while maintaining <1μA leakage to preserve input logic threshold accuracy. |
| LED Driver Overvoltage Clamp | Automotive CAN Transceiver Line Protection |
Use Scenario: Clamping overvoltage spikes on constant-current LED driver outputs caused by hot-plug events or cable disconnects. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED string output, conducting only during transient excursions above 43V. Use Value: Prevents catastrophic failure of MOSFET switches and current-sense resistors by limiting peak voltage to 76.7V. | Use Scenario: Secondary-level protection on CAN_H/CAN_L lines downstream of primary common-mode choke and integrated transceiver ESD diodes. IC Role / Device Role / Timing Role: High-energy backup clamp for ISO 11898-2 bus lines exposed to battery feed-through faults or alternator ripple. Use Value: Adds 500W surge margin beyond transceiver's internal 16kV HBM rating, enabling compliance with OEM-specific EMC requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A | Same DO-214AC package; lower PPK (400W), higher VC (83.2V @ 5.5A), non-AEC-Q101. | Not qualified for automotive under-hood use; suitable for commercial-grade industrial controls. | Select SMAJ43A only if AEC-Q101 is not required and 400W surge capacity suffices. |
| P6KE43A | DO-204AL (DO-41) package; same VWM/VBR range but higher VC (83.2V @ 5.5A), no AEC-Q101 qualification. | Larger footprint and lower thermal dissipation; limited to board space where DO-15 is unavailable. | Choose P6KE43A only when DO-204AC is incompatible with layout, and automotive qualification is unnecessary. |
Compared with SMAJ43A and P6KE43A, the SA43CH delivers AEC-Q101 validation, tighter VBR tolerance (±11%), lower clamping voltage (76.7V vs ≥83.2V), and optimized DO-204AC thermal performance - making it the preferred choice for automotive 48V systems and high-reliability industrial designs requiring guaranteed surge immunity.
Availability
SA43CH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O modules, LED driver protection, and CAN bus interface circuits requiring stable component supply across extended temperature and lifecycle demands.
Supply support for SA43CH 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 12V–48V automotive subsystems and industrial power interfaces, emphasizing low clamping voltage, high surge robustness, and long-term reliability under thermal cycling.
FAQ
What is the AEC-Q101 qualification status of the SA43CH?
The SA43CH is explicitly AEC-Q101 qualified per the manufacturer's ordering code suffix "H", confirming full stress testing for automotive applications including temperature cycling, humidity bias, and mechanical shock. This qualification applies directly to the SA43CH part number and is documented in Taiwan Semiconductor's SA Series L2105 specification release.
Does the SA43CH have bidirectional capability?
No, the SA43CH is a unidirectional TVS diode - confirmed by its designation (no "CA" suffix), cathode band marking, and electrical specifications listing only one VBR range and clamping curve. Bidirectional variants like SA43CA exist but are distinct part numbers with different pin behavior and dual-direction clamping.
What is the maximum clamping voltage of the SA43CH at its rated peak pulse current?
The SA43CH has a maximum clamping voltage (VC) of 76.7 V at 6.8 A peak pulse current (IPPM), measured under the standard 10/1000μs double-exponential surge waveform. This value is specified in the "Maximum clamping voltage VC@IPPM" row of the SA Series electrical characteristics table for part number SA43.
Can the SA43CH be used in surface-mount designs?
No, the SA43CH uses a DO-204AC (DO-15) axial-leaded package intended for through-hole mounting. It is not a surface-mount device. For SMD alternatives, engineers should consider TSC's SMAJ43A (DO-214AC) or other SOD-123/SMA packages - but those are separate part numbers with different ratings and qualifications.
What is the junction capacitance of the SA43CH at zero bias?
Junction capacitance is not specified for the SA43CH in the provided documentation. The SA Series datasheet includes a generic junction capacitance curve (Fig.4) showing typical values from ~100pF at 5V to ~30pF at 40V, but no discrete value is published for SA43CH at VR = 0V. Designers requiring precise Cj should consult TSC's characterization reports or measure on sample units.
SA43CH 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:
- -
- 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)
SA43CH FAQ
1.How can I place an order for SA43CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43CH 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 SA43CH reliable?
The price and inventory of SA43CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43CH is usually 5 days.
3.What payment methods are accepted for SA43CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43CH?
SA43CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43CH 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 SA43CH?
For technical support, including SA43CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43CH requirements.
6.How does Aetrix verify that SA43CH is sourced from the original manufacturer or authorized distributors?
All SA43CH 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 SA43CH meets industry standards.
7.What is the process for return or replacement of SA43CH?
All SA43CH units undergo pre-shipment inspection (PSI). If there is an issue with SA43CH, 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 SA43CH part is unused and in its original packaging.
Return procedure for SA43CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SA43CH Tags
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