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Taiwan Semiconductor Corporation SA64
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- Part No.:
- SA64
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA64.pdf
- Description:
- 500W, 79V, 10%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:6,845
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Product details
Overview
SA64 from Taiwan Semiconductor is a unidirectional 500W transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, with 64V working stand-off voltage (VWM), 71.1–86.9V breakdown voltage (VBR @ 1mA), 114V clamping voltage at 4.6A peak pulse current, and <1μA reverse leakage above 10V. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA64 datasheet, SA64 pinout, SA64 application, or SA64 equivalent, key selection criteria include its 64V VWM compatibility with 48V/60V systems, 114V VC rating under 10/1000μs surge, AEC-Q101 qualification path (via SA64H variant), and DO-15 through-hole mounting for high-reliability board-level surge protection.
Technical Context
The SA64 operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its specified VBR range (71.1–86.9V at 1mA). Its low dynamic impedance enables rapid clamping to 114V at 4.6A (10/1000μs waveform), limiting energy dissipation in protected ICs.
Designed for DC power line protection, it supports junction temperatures from –55°C to +175°C, features <1μA IR at 64V, and exhibits a 86mV/°C VBR temperature coefficient - critical for stable clamping across automotive thermal profiles.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 64 V - Maximum continuous reverse operating voltage before conduction; matches 48V/60V nominal bus systems with safety margin. |
| VBR @ 1mA | 71.1–86.9 V - Breakdown threshold range; ensures reliable turn-on during transients without false triggering. |
| VC @ IPPM | 114 V at 4.6 A (10/1000μs) - Clamped voltage seen by downstream circuitry; defines maximum stress on protected load. |
| PPK | 500 W - Peak pulse power handling per single non-repetitive surge; validated per IEC 61000-4-5 Level 4. |
| IR @ VWM | <1 μA - Reverse leakage at rated stand-off; minimizes standby power loss and avoids false resets in low-current systems. |
| TJ max | +175 °C - Maximum junction temperature; enables deployment in under-hood automotive environments. |
| Package | DO-204AC (DO-15) - Standard axial-leaded through-hole package with tin-plated leads, UL 94V-0 molding, and JESD201 Class 2 whisker resistance. |
Pinout & Package
DO-204AC (DO-15) package: axial-leaded, cylindrical epoxy body, cathode indicated by band. Leads are pure tin-plated, solderable per J-STD-002, with 0.400g typical weight and 9.5mm lead length for 75°C thermal derating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Surge return path | Connected to system ground or low-side reference; completes clamping loop during transient events. |
| Cathode | Reverse-biased input / Protected line connection | Connected to the line being protected (e.g., 48V rail); conducts avalanche current when V > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| 500W peak pulse power (10/1000μs) | Enables compliance with IEC 61000-4-5 surge immunity up to 4kV (line-earth) in industrial and automotive power supplies. |
| <1μA reverse leakage at 64V | Prevents excessive quiescent current in always-on battery-backed modules such as telematics or CAN gateway controllers. |
| 114V clamping voltage at 4.6A | Limits voltage overshoot to safe levels for 100V-rated MOSFETs and 120V-input DC-DC controllers in 48V architectures. |
| AEC-Q101 qualification path (SA64H) | Supports automotive-grade reliability validation including HTOL, TC, and ESD testing - required for engine control, ADAS, and body electronics. |
| DO-204AC mechanical robustness | UL 94V-0 flammability rating and JESD201 Class 2 whisker resistance ensure long-term reliability in vibration-prone and high-humidity environments. |
Applications
| Automotive Power Rail Protection | Industrial 48V DC Distribution |
|---|---|
Use Scenario: Protecting 48V battery management system (BMS) front-end from load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 48V rail and ground to clamp transients exceeding 64V. Use Value: Limits peak voltage to 114V, safeguarding 100V-rated gate drivers and isolated ADCs without derating margins. |
Use Scenario: Securing programmable logic controller (PLC) 48V I/O module inputs against inductive kickback from solenoid loads. IC Role / Device Role / Timing Role: Standoff protector on field-side terminals, absorbing 500W pulses within 10/1000μs envelope. Use Value: Prevents latch-up in digital isolators and preserves signal integrity in 24/48V digital input circuits. |
| LED Driver Overvoltage Clamp | EFT-Immune Sensor Interface |
Use Scenario: Safeguarding constant-current LED driver ICs in commercial lighting against AC line coupling and lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input stage, activated within <1ps of overvoltage onset. Use Value: Maintains LED string operation by limiting transient duration and amplitude below driver IC's absolute maximum ratings. |
Use Scenario: Shielding analog sensor front-ends (e.g., pressure, temperature) in factory automation equipment from electrical fast transients (IEC 61000-4-4). IC Role / Device Role / Timing Role: Low-leakage (≤1μA) standoff protector on supply rail, ensuring no DC offset drift during normal operation. Use Value: Preserves sub-mV measurement accuracy while surviving 2kV EFT bursts without degradation. |
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 | Surface-mount SMA package (vs. SA64's through-hole DO-15); 64V VWM, 115V VC @ 4.5A; same 500W rating but lower thermal mass. | Preferred for space-constrained PCBs; less suitable for high-vibration or high-power dissipation scenarios requiring mechanical robustness. | Select SMAJ64A only when automated SMT assembly and board real estate are prioritized over mechanical durability and thermal cycling resilience. |
| P6KE68A | Legacy 600W DO-15 TVS; 68V VWM, 118V VC @ 5.1A; higher clamping voltage and wider VBR tolerance (64.6–71.4V). | Used in legacy industrial designs; lacks AEC-Q101 path and has higher leakage (>5μA at 64V). | Choose P6KE68A only for cost-sensitive, non-automotive retrofits where 118V clamping and higher leakage are acceptable trade-offs. |
Compared with SMAJ64A and P6KE68A, the SA64 offers tighter VBR tolerance (71.1–86.9V), lower leakage (<1μA), and direct AEC-Q101 qualification path via SA64H - making it optimal for new automotive and high-reliability industrial designs requiring precise clamping and long-term stability.
Availability
SA64 is available at Aetrix Electronics and suitable for automotive power rail protection, industrial 48V DC distribution, and LED driver overvoltage clamp applications requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for SA64 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 MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The SA Series is TSC's high-reliability transient voltage suppressor family designed specifically for automotive, industrial, and lighting applications demanding robust 500W surge immunity and extended temperature operation.
FAQ
What is the clamping voltage of the SA64 under standard 10/1000μs surge conditions?
The SA64 clamps to a maximum of 114 V when subjected to a 4.6 A peak pulse current with a 10/1000μs waveform. This value is measured per IEC 61000-4-5 test methodology and defines the upper voltage limit imposed on protected circuitry during surge events - a critical parameter for ensuring downstream ICs remain within their absolute maximum ratings.
Is the SA64 suitable for automotive applications requiring AEC-Q101 qualification?
The base SA64 is not AEC-Q101 qualified, but its variant SA64H is explicitly qualified per AEC-Q101. The SA64H shares identical electrical specifications (VWM = 64 V, VBR = 71.1–86.9 V, VC = 114 V) and DO-204AC packaging, differing only in enhanced reliability screening - making SA64H the appropriate choice for engine control units, body electronics, and ADAS modules.
How does the SA64's reverse leakage compare to similar 64V TVS diodes?
The SA64 specifies reverse leakage current <1 μA at its full 64 V working stand-off voltage, significantly lower than legacy alternatives like P6KE68A (>5 μA at 64 V). This ultra-low leakage prevents parasitic loading in battery-powered or high-impedance sensor circuits, preserving accuracy and extending operational life in always-on systems.
What is the maximum junction temperature rating for the SA64, and how does it impact board layout?
The SA64 supports a maximum junction temperature of +175°C, enabling use in under-hood automotive and industrial environments. To maintain this rating, the datasheet requires mounting on 10 × 10 mm copper pads per terminal - a thermal design requirement that directly impacts PCB copper area allocation and heatsinking strategy for sustained surge duty cycles.
Can the SA64 be used in bidirectional configurations?
No - the SA64 is a unidirectional TVS diode, intended for DC line-to-ground protection only. For bidirectional AC or data-line protection, the SA64A variant must be selected; it shares the same 64 V VWM but provides symmetrical breakdown in both polarities, with VBR = 71.1–78.6 V and VC = 103 V at 5.0 A.
SA64 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 64V
- Voltage - Breakdown (Min):
- 71.1V
- Voltage - Clamping (Max) @ Ipp:
- 114V
- Current - Peak Pulse (10/1000µs):
- 4.6A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- 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)
SA64 FAQ
1.How can I place an order for SA64 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA64 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 SA64 reliable?
The price and inventory of SA64 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA64 is usually 5 days.
3.What payment methods are accepted for SA64?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA64 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA64?
SA64 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA64 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 SA64?
For technical support, including SA64 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA64 requirements.
6.How does Aetrix verify that SA64 is sourced from the original manufacturer or authorized distributors?
All SA64 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 SA64 meets industry standards.
7.What is the process for return or replacement of SA64?
All SA64 units undergo pre-shipment inspection (PSI). If there is an issue with SA64, 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 SA64 part is unused and in its original packaging.
Return procedure for SA64:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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