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Taiwan Semiconductor Corporation SA64CAH
- Part No.:
- SA64CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA64CAH.pdf
- Description:
- TVS DIODE 64VWM 103VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,451
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Product details
Overview
SA64CAH from Taiwan Semiconductor is a bidirectional AEC-Q101-qualified transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for automotive and industrial surge protection. It features 64 V working stand-off voltage (VWM), 71.1–78.6 V breakdown voltage (VBR @ 1 mA), 500 W peak pulse power (10/1000 µs), clamping voltage of 103 V at 5.0 A IPPM, and operating junction temperature up to +175 °C.
For engineers reviewing the SA64CAH datasheet, SA64CAH pinout, SA64CAH application, or SA64CAH equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, AEC-Q101 qualification status, DO-15 mechanical data, and real-world EFT/inductive-switching protection use cases - all confirmed from Taiwan Semiconductor's official SA Series documentation (Version L2105).
Technical Context
The SA64CAH is a silicon avalanche diode optimized for bidirectional transient suppression. Its symmetrical VBR min/max (71.1–78.6 V) and identical clamping performance in both polarities enable robust protection against reverse- and forward-going surges without polarity dependency. It meets IEC 61000-4-4 (EFT) and ISO 7637-2 requirements when applied with proper PCB layout.
With 1 μA max reverse leakage at 64 V and <5 ns response time, the device maintains low system standby current while reacting faster than most microcontroller I/O pins can be damaged. Its 175 °C TJ max rating supports under-hood automotive placement, and its DO-15 package allows manual or automated through-hole assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous DC or RMS voltage the device blocks without clamping; sets system operating margin before protection activates. |
| VBR @ 1 mA | 71.1–78.6 V - Breakdown threshold range; ensures reliable conduction onset during transients while avoiding false triggering near nominal rail. |
| VC @ IPPM | 103 V at 5.0 A - Clamped voltage during 10/1000 µs surge; defines maximum stress imposed on downstream ICs during worst-case transient. |
| PPK | 500 W - Peak pulse power handling per 10/1000 µs waveform; validates capability to absorb common automotive load-dump and inductive kick energy. |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; guarantees negligible quiescent current drain in battery-powered or low-power systems. |
| TJ max | +175 °C - Maximum junction temperature; enables deployment in high-ambient environments such as engine control units or lighting modules. |
| Package | DO-204AC (DO-15) - Standard through-hole package with tin-plated leads; compatible with IPC-J-STD-002 solderability and JESD201 Class 2 whisker resistance. |
Pinout & Package
SA64CAH is a two-terminal bidirectional TVS diode in DO-204AC (DO-15) package. It has no polarity marking - terminals are functionally symmetric. Cathode band is absent, distinguishing it from unidirectional SA64 variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts positive or negative transient voltage; no orientation required during PCB placement. |
| Case / Body | Thermal and mechanical interface | DO-15 molded body provides UL 94V-0 flammability rating and 0.400 g mass; aids heat dissipation via lead-frame conduction. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - required for ECUs, body controllers, and ADAS sensors. |
| Bidirectional clamping | Identical VBR and VC performance in both directions eliminates need for polarity-aware layout or external series components. |
| 500 W surge rating (10/1000 µs) | Withstands ISO 7637-2 Pulse 1 (inductive switch-off) and Pulse 2a (load dump initiation) without degradation. |
| <5 ns response time | Faster than typical MCU GPIO or CAN transceiver input rise times - ensures protection engages before internal circuitry latches or fails. |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - supports green manufacturing and end-of-life compliance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting LIN bus or 12 V supply lines in door modules or seat controllers from load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional shunt clamp placed between power rail and ground, absorbing energy before it reaches PMIC or microcontroller LDO inputs. Use Value: Maintains system uptime by limiting rail overvoltage to ≤103 V during 5 A transients - well below typical 36 V absolute max ratings of automotive PMICs. |
Use Scenario: Safeguarding analog front-end inputs of pressure or temperature sensors exposed to EFT bursts in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS placed directly at connector entry point, diverting fast 5 ns transients before signal conditioning amplifiers. Use Value: Sub-1 µA leakage preserves sensor offset accuracy; symmetrical clamping prevents polarity-dependent damage during field wiring reversals. |
| LED Driver Output Protection | Power Supply Input Stage Clamp |
Use Scenario: Shielding constant-current LED driver outputs from inductive kickback when driving solenoid-based dimming circuits. IC Role / Device Role / Timing Role: Parallel-connected TVS across output terminals, clamping flyback spikes generated during MOSFET turn-off. Use Value: 500 W rating handles repetitive 10/1000 µs surges from 70 A IFSM-rated inductive loads - prevents driver IC latch-up or bond-wire fusing. |
Use Scenario: Front-end surge suppression on AC/DC adapter primary-side rectifier outputs subjected to lightning-induced surges. IC Role / Device Role / Timing Role: Standoff-rated clamp placed after bridge rectifier but before bulk capacitor, limiting transient overshoot into switching controller. Use Value: 64 V VWM aligns with 48–56 VDC nominal outputs; 103 V VC ensures downstream PWM controller (e.g., UC384x) remains within 15 V VCC abs max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ64A | Unidirectional; 64 V VWM, 71.1–78.6 V VBR, 400 W PPK (10/1000 µs), SMA package. | Requires correct polarity placement; lower surge rating limits use in high-energy automotive load-dump scenarios. | Select SMAJ64A only if board space is constrained and polarity is fixed; SA64CAH preferred where layout flexibility or bidirectional threat models exist. |
| 1.5KE68CA | DO-201 package; 68 V VWM, 75.6–83.4 V VBR, 1500 W PPK (10/1000 µs), higher clamping (118 V at 12.8 A). | Larger footprint and higher VC reduce compatibility with low-voltage ICs; better suited for 24 V industrial mains input stages. | Choose 1.5KE68CA for higher-energy surges where board area permits; SA64CAH offers tighter clamping and AEC-Q101 validation for automotive signal-level protection. |
Compared with SMAJ64A and 1.5KE68CA, SA64CAH uniquely combines AEC-Q101 qualification, DO-15 through-hole manufacturability, 500 W surge capacity, and sub-103 V clamping - making it optimal for cost-sensitive, high-reliability automotive and industrial signal-line protection where bidirectional threats and thermal constraints coexist.
Availability
SA64CAH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and LED driver output clamping requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SA64CAH 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 headquartered in Hsinchu, Taiwan, specializing in discrete power devices, TVS diodes, rectifiers, and thyristors since 1979.
The SA Series was developed specifically for automotive and industrial transient suppression, emphasizing AEC-Q101 qualification, tight VBR tolerances, and robust surge handling in standard DO-15 packaging - targeting ECU, lighting, and power conversion applications.
FAQ
What does the "H" suffix in SA64CAH signify?
The "H" suffix in SA64CAH indicates full AEC-Q101 qualification per Rev D test requirements, including stress tests for temperature cycling, high-temperature reverse bias, and ESD. This certification confirms SA64CAH is approved for use in automotive electronic control units, body electronics, and ADAS subsystems - unlike non-H variants such as SA64CA.
Is SA64CAH unidirectional or bidirectional, and how is polarity identified?
SA64CAH is a bidirectional TVS diode - it clamps transients of either polarity identically, with no cathode band or polarity marking on the DO-15 package. Unlike unidirectional SA64A, SA64CAH has symmetrical VBR and VC characteristics in both directions, eliminating orientation concerns during PCB assembly.
What is the maximum clamping voltage of SA64CAH under standard test conditions?
The maximum clamping voltage of SA64CAH is 103 V, measured at 5.0 A peak pulse current (IPPM) using the 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and defines the upper voltage limit imposed on protected circuitry during surge events.
Can SA64CAH replace SA64A in an existing design?
SA64CAH cannot directly replace SA64A without layout review: SA64A is unidirectional and requires correct cathode orientation, while SA64CAH is bidirectional and polarity-agnostic. Though both share VWM and VBR ranges, SA64CAH's symmetrical behavior may alter system-level ESD immunity testing outcomes and should be revalidated per IEC 61000-4-2.
What is the junction-to-ambient thermal resistance (RθJA) for SA64CAH in DO-15 package?
Taiwan Semiconductor does not publish RθJA for SA64CAH in standard datasheet Version L2105. Thermal performance depends on PCB copper area; the datasheet specifies 3 W steady-state power dissipation at TL = 75 °C with 10 × 10 mm copper pads per lead - use this derating curve (Fig.2) for thermal design rather than assuming fixed RθJA.
SA64CAH 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):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 103V
- Current - Peak Pulse (10/1000µs):
- 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)
SA64CAH FAQ
1.How can I place an order for SA64CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SA64CAH 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 SA64CAH reliable?
The price and inventory of SA64CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA64CAH is usually 5 days.
3.What payment methods are accepted for SA64CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA64CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA64CAH?
SA64CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA64CAH 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 SA64CAH?
For technical support, including SA64CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA64CAH requirements.
6.How does Aetrix verify that SA64CAH is sourced from the original manufacturer or authorized distributors?
All SA64CAH 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 SA64CAH meets industry standards.
7.What is the process for return or replacement of SA64CAH?
All SA64CAH units undergo pre-shipment inspection (PSI). If there is an issue with SA64CAH, 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 SA64CAH part is unused and in its original packaging.
Return procedure for SA64CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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