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Taiwan Semiconductor Corporation SA75CH
- Part No.:
- SA75CH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA75CH.pdf
- Description:
- 500W, 95.2V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,272
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Product details
Overview
SA75CH from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode with 75V working stand-off voltage, 83.3–102V breakdown voltage at 1mA test current, and 134V maximum clamping voltage at 3.9A peak pulse current; designed for automotive-grade ESD and inductive load protection in power supply rails and signal lines.
For engineers reviewing the SA75CH datasheet, SA75CH pinout, SA75CH application, or SA75CH equivalent, this AEC-Q101-qualified DO-15 TVS offers verified clamping performance under 10/1000μs surge, low leakage (<1μA @ 75V), and thermal stability up to +175°C junction temperature - critical for automotive body control modules, LED driver inputs, and industrial sensor interfaces.
Technical Context
The SA75CH operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its VBR range (83.3–102V); it clamps transients to ≤134V at 3.9A IPPM using silicon avalanche junction technology. Its fast response time (<1.0ps from 0V to VBR) ensures protection before downstream IC damage occurs.
Designed for automotive reliability, SA75CH meets AEC-Q101 stress requirements including high-temperature operating life, temperature cycling, and mechanical shock. Its DO-204AC (DO-15) package supports lead-free reflow soldering per J-STD-002 and passes JESD201 Class 2 whisker testing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 75 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC/AC rail margin. |
| VBR @ IT=1mA | 83.3–102 V - Breakdown voltage range at 1mA test current; determines precise turn-on threshold tolerance. |
| VC @ IPPM=3.9A | 134 V - Clamped voltage during 10/1000μs surge; sets worst-case overvoltage seen by protected circuitry. |
| PPK | 500 W - Peak pulse power rating per 10/1000μs waveform; quantifies single-event surge energy absorption capability. |
| IR @ VWM | <1 μA - Reverse leakage at 75V; ensures minimal standby power loss and signal integrity in high-impedance nodes. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments without derating. |
| Package | DO-204AC (DO-15) - Industry-standard axial-leaded package with 0.400g mass; compatible with legacy through-hole assembly and automated tape-and-reel handling. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: cathode indicated by band marking; anode and cathode terminals support unidirectional surge shunting from line-to-ground.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path | Connected to system ground or low-impedance return; completes clamping loop during transient events. |
| Cathode | Protected line input | Connected to vulnerable node (e.g., 12V rail, LIN bus, sensor output); conducts avalanche current when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive under-hood use including temperature cycling, humidity bias, and mechanical shock per JEDEC standards. |
| Low clamping ratio (VC/VBR ≈ 1.32) | Ensures tight overvoltage control - critical for protecting 75V-rated CAN FD transceivers and microcontroller I/O pins. |
| Sub-1ps response time | Activates before ESD pulses (IEC 61000-4-2) or fast transients propagate into sensitive analog front-ends. |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; supports green manufacturing and end-of-life recycling requirements. |
| UL 94V-0 molding compound | Prevents flame propagation during fault conditions - required for automotive lighting and battery management systems. |
Applications
| Automotive Body Control Module (BCM) | Industrial LED Driver Input Protection |
|---|---|
Use Scenario: Protects 12V/24V power inputs of BCM microcontrollers and CAN transceivers from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and LDO input to clamp transients to ≤134V within nanoseconds. Use Value: Prevents latch-up or gate oxide rupture in 3.3V/5V logic ICs by limiting overvoltage exposure below their absolute maximum ratings. | Use Scenario: Shields constant-current LED driver ICs from inductive kickback generated by relay-controlled AC mains switching. IC Role / Device Role / Timing Role: Mounted across driver input terminals to absorb 500W 10/1000μs surges induced by contactor bounce. Use Value: Eliminates need for oversized input capacitors or secondary crowbar circuits - reduces BOM cost and PCB area. |
| Automotive LIN Bus Node | Industrial Sensor Signal Line Protection |
Use Scenario: Safeguards LIN transceiver pins against ESD events and electrical fast transients in door module wiring harnesses. IC Role / Device Role / Timing Role: Connected between LIN data line and chassis ground to clamp ±8kV contact ESD per ISO 10605. Use Value: Maintains signal integrity with <1μA leakage at 12V, avoiding false wake-up or communication errors in sleep mode. | Use Scenario: Protects 4–20mA current-loop sensor outputs from field-induced surges in factory automation environments. IC Role / Device Role / Timing Role: Placed across sensor output terminals to divert transients away from precision op-amp input stages. Use Value: Preserves measurement accuracy by limiting clamping voltage to 134V - well below breakdown thresholds of instrumentation amplifiers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ75A | Same DO-214AC package; bidirectional configuration; 75V VWM but symmetric clamping (VC = 121V both polarities). | Suitable for AC-coupled or differential signal lines where polarity reversal may occur; not ideal for unidirectional DC rails. | Select SMAJ75A only if bidirectional protection is required; SA75CH provides lower clamping voltage on forward surge due to unidirectional architecture. |
| Vishay 1.5SMC75A | DO-214AB package; higher PPK (1500W); 75V VWM; VC = 121V at 12.3A IPPM. | Better suited for high-energy industrial surges (e.g., motor drive feedback lines); larger footprint and higher cost than DO-15. | Choose 1.5SMC75A when surge energy exceeds 500W; SA75CH remains optimal for space-constrained automotive PCBs requiring AEC-Q101 compliance. |
Compared with SMAJ75A and 1.5SMC75A, SA75CH delivers AEC-Q101 qualification in a smaller DO-15 package with tighter thermal resistance and lower system-level BOM cost - making it the preferred choice for automotive body electronics where size, qualification, and clamping precision are prioritized over ultra-high energy rating.
Availability
SA75CH is available at Aetrix Electronics and suitable for automotive body control modules, industrial LED drivers, LIN bus nodes, and sensor signal line protection requiring stable component supply across production lifecycles.
Supply support for SA75CH 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SA Series was developed specifically for AEC-Q101-compliant transient suppression in harsh automotive environments - emphasizing low clamping voltage, fast response, and robust thermal performance in compact axial packages.
FAQ
What is the clamping voltage of SA75CH under standard 10/1000μs surge conditions?
The SA75CH has a maximum clamping voltage (VC) of 134 V at 3.9 A peak pulse current (IPPM) under the 10/1000μs waveform. This value is measured per ANSI/IEEE C62.35 and represents the worst-case overvoltage imposed on protected circuitry during a standardized surge event - critical for ensuring downstream ICs remain within their absolute maximum voltage ratings.
Is SA75CH qualified for automotive applications?
Yes, SA75CH is AEC-Q101 qualified, as confirmed by Taiwan Semiconductor's documentation. The "H" suffix in SA75CH explicitly denotes AEC-Q101 compliance, covering stress tests including high-temperature operating life, temperature cycling, and mechanical shock - making it suitable for under-hood and body electronics applications such as BCMs and LIN nodes.
What does the "CH" suffix mean in SA75CH?
The "CH" suffix in SA75CH indicates two features: "C" denotes unidirectional configuration, and "H" confirms AEC-Q101 qualification. This distinguishes it from non-automotive variants like SA75 and bidirectional versions like SA75A - ensuring engineers select the correct variant for automotive-grade unidirectional surge protection.
Can SA75CH be used in place of SA75A?
No, SA75CH and SA75A are not interchangeable. SA75CH is unidirectional and AEC-Q101 qualified; SA75A is bidirectional with symmetric breakdown (6.4–209 V) and no automotive qualification. Substituting SA75A would expose the circuit to unintended conduction during normal forward bias and lack required automotive reliability validation.
What is the maximum junction temperature rating for SA75CH?
The SA75CH has a maximum junction temperature (TJ max) rating of +175°C, as specified in its Absolute Maximum Ratings table. This allows reliable operation in high-ambient environments such as engine compartments or industrial enclosures - provided PCB thermal design maintains junction temperature below this limit during surge events and steady-state conduction.
SA75CH 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):
- 75V
- Voltage - Breakdown (Min):
- 83.3V
- Voltage - Clamping (Max) @ Ipp:
- 134V
- Current - Peak Pulse (10/1000µs):
- 3.9A
- 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)
SA75CH FAQ
1.How can I place an order for SA75CH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA75CH 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 SA75CH reliable?
The price and inventory of SA75CH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA75CH is usually 5 days.
3.What payment methods are accepted for SA75CH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA75CH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA75CH?
SA75CH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA75CH 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 SA75CH?
For technical support, including SA75CH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA75CH requirements.
6.How does Aetrix verify that SA75CH is sourced from the original manufacturer or authorized distributors?
All SA75CH 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 SA75CH meets industry standards.
7.What is the process for return or replacement of SA75CH?
All SA75CH units undergo pre-shipment inspection (PSI). If there is an issue with SA75CH, 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 SA75CH part is unused and in its original packaging.
Return procedure for SA75CH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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