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Taiwan Semiconductor Corporation SA6.5A
- Part No.:
- SA6.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA6.5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,767
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Product details
Overview
SA6.5A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 500W peak pulse power at 10/1000μs, 6.5V working stand-off voltage, and clamping voltage of 11.2V at 400A peak pulse current. It protects automotive and industrial power rails against ESD, EFT, and inductive switching transients.
For engineers reviewing the SA6.5A datasheet, SA6.5A pinout, SA6.5A application, or SA6.5A equivalent, key selection criteria include its 7.22–7.98V breakdown voltage range, <1μA reverse leakage at 10V, AEC-Q101 qualification option (SA6.5AH), 175°C max junction temperature, and DO-15 polarity-marked cathode band layout.
Technical Context
The SA6.5A operates as a silicon avalanche diode with fast response time (<1.0ps from 0V to VBR) and low dynamic impedance, enabling precise clamping during sub-nanosecond ESD events. Its unidirectional configuration provides forward conduction capability up to 70A surge current (8.3ms half-sine).
Designed for primary-side overvoltage protection in 5V DC systems, it complies with IEC 61000-4-2 (±30kV contact), IEC 61000-4-4 (±4kV EFT), and ISO 7637-2 pulse 1/2a/3a immunity requirements when properly mounted on PCB copper pads per JEDEC standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5V - Maximum continuous DC or RMS voltage the device blocks without significant leakage |
| VBR @ IT=10mA | 7.22–7.98V - Breakdown voltage range confirming reliable avalanche initiation under standardized test conditions |
| VC @ IPPM=400A | 11.2V - Clamped voltage seen by protected circuit during worst-case 10/1000μs surge, limiting stress on downstream ICs |
| IR @ VWM | <1μA - Ultra-low reverse leakage ensures minimal power loss and signal integrity in standby or low-power modes |
| PPK | 500W - Peak pulse power rating defining maximum transient energy absorption capability per single event |
| TJMAX | 175°C - Maximum junction temperature enabling operation in under-hood automotive environments and high-ambient industrial enclosures |
| 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) package with axial leads: Cathode indicated by a painted band; anode is unmarked lead. Mounting requires 10×10 mm copper pads per terminal for rated 3W steady-state dissipation at TL=75°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked lead) | Current entry point in forward bias; connected to system ground or low-side return path | Enables bidirectional surge shunting only when used in complementary pairs; not functional for reverse conduction |
| Cathode (banded lead) | Transient current sink during overvoltage; connected to protected line (e.g., 5V rail) | Defines polarity-sensitive placement-reversal causes permanent failure under normal operating voltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified variant available (SA6.5AH) | Validated for automotive powertrain and body electronics per stress test requirements including HTOL, TC, UHAST |
| Clamping voltage ≤11.2V at 400A | Ensures protected 5V logic interfaces remain below absolute maximum ratings during ISO 7637-2 Pulse 1 (−150V/50Ω) |
| Response time <1.0ps | Prevents voltage overshoot before protection activates-critical for high-speed MCU I/O and CAN transceivers |
| RoHS + halogen-free (IEC 61249-2-21) | Meets automotive OEM material compliance mandates and enables use in green manufacturing processes |
| 175°C junction rating | Supports placement near heat-generating components (e.g., DC-DC converters) without derating in most layouts |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 5V supply line feeding engine control unit (ECU) microcontrollers and analog front-ends exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Primary overvoltage clamp placed between fuse and LDO input, absorbing transients before they reach sensitive regulators. Use Value: Limits rail excursion to ≤11.2V during 500W surges, preventing latch-up or gate oxide damage in downstream 5V logic ICs. | Use Scenario: RS-485 transceiver data lines in factory automation PLCs subjected to EFT bursts from relay coil switching. IC Role / Device Role / Timing Role: Secondary-level TVS on differential bus lines, coordinated with common-mode chokes to meet IEC 61000-4-4 Level 4 immunity. Use Value: Clamps induced common-mode spikes to safe levels while maintaining signal integrity due to low capacitance (<100pF typical at 0V). |
| LED Driver Output Protection | USB Port ESD Safeguard |
Use Scenario: Constant-current LED driver output driving automotive exterior lighting, subject to inductive kickback from solenoid-controlled dimming circuits. IC Role / Device Role / Timing Role: Unidirectional TVS placed across LED string terminals to absorb reverse EMF during MOSFET turn-off. Use Value: Withstands 70A 8.3ms forward surge (IFSM), eliminating need for external snubbers in compact headlamp modules. | Use Scenario: VBUS line of USB 2.0 ports in infotainment head units, exposed to ±15kV human-body-model ESD events. IC Role / Device Role / Timing Role: First-line defense before polymeric PTC and port controller IC, diverting ESD current to chassis ground. Use Value: Sub-1.0ps response ensures clamping initiates before USB PHY transceivers experience destructive voltage overshoot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A | Same DO-214AC package; 600W rating; slightly higher VC = 11.5V @ 43.5A | Higher surge rating suits repetitive industrial transients; lower current density may reduce thermal stress in high-duty-cycle designs | Select SMAJ6.5A when board space allows SMC/SMA footprint and 600W margin is required beyond automotive pulse profiles |
| P6KE6.8A | DO-15 package; 600W rating; VBR = 7.14–7.88V; VC = 10.5V @ 42.9A | Lower clamping voltage improves protection margin for 5V logic but lacks AEC-Q101 qualification path | Choose P6KE6.8A for cost-sensitive industrial controls where automotive qualification is unnecessary |
Compared with SA6.5A, SMAJ6.5A offers higher surge power in a surface-mount package ideal for automated assembly, while P6KE6.8A delivers tighter clamping at lower cost-but neither supports AEC-Q101 qualification like the SA6.5AH variant.
Availability
SA6.5A is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, and LED driver output safeguarding requiring stable component supply across multi-year production cycles.
Supply support for SA6.5A 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, serving global automotive, industrial, and consumer markets since 1979.
The SA Series TVS diodes are engineered specifically for robust transient immunity in harsh-environment electronics, emphasizing AEC-Q101 readiness, high-temperature reliability, and precise clamping performance across 5V–170V working voltage range.
FAQ
What is the maximum clamping voltage of SA6.5A under standard test conditions?
The SA6.5A exhibits a maximum clamping voltage (VC) of 11.2V when subjected to a 400A peak pulse current with a 10/1000μs waveform at TA = 25°C. This value is measured across the device terminals during surge conduction and defines the upper voltage limit imposed on the protected circuit. The SA6.5A maintains this clamping performance consistently across its specified operating temperature range, making it suitable for protecting 5V logic rails in automotive and industrial applications.
Is SA6.5A unidirectional or bidirectional, and how does that affect circuit placement?
The SA6.5A is a unidirectional TVS diode, indicated by its cathode band marking and specified electrical characteristics for forward and reverse operation. It must be placed with the banded (cathode) end connected to the line being protected and the unmarked (anode) end tied to ground or return path. Reversing this orientation will cause immediate failure under normal operating voltage. The SA6.5A is not rated for bidirectional use-designers requiring symmetrical protection should select the SA6.5CA variant instead.
Does SA6.5A meet automotive qualification standards?
The base SA6.5A part is not AEC-Q101 qualified; however, the SA6.5AH variant-identical in all electrical and mechanical specifications except for extended reliability testing-is fully AEC-Q101 qualified. SA6.5AH undergoes high-temperature operating life (HTOL), temperature cycling (TC), and unbiased highly accelerated stress test (UHAST) per automotive requirements. For automotive applications, specify SA6.5AH to ensure compliance with OEM component validation protocols.
What is the reverse leakage current specification for SA6.5A at its working voltage?
The SA6.5A specifies a maximum reverse leakage current (IR) of less than 1μA when biased at its 6.5V working stand-off voltage (VWM) and tested at TA = 25°C. This ultra-low leakage ensures minimal quiescent power draw and avoids interference with low-power sensor circuits or battery-backed systems. Leakage remains well below 10μA even at elevated temperatures up to 125°C, supporting reliable operation in thermally demanding environments.
Can SA6.5A be used in parallel to increase surge current handling?
No-SA6.5A devices should not be paralleled to increase peak pulse current capacity. Minor parametric variations in breakdown voltage (VBR = 7.22–7.98V) cause uneven current sharing during transients, leading to thermal runaway in the lower-VBR unit. For higher surge ratings, select a single higher-rated device such as SA6.5AH (AEC-Q101) or consider the 600W SMAJ6.5A in DO-214AC. System-level protection coordination should always be verified using SPICE simulation with manufacturer-provided models for SA6.5A.
SA6.5A 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):
- 6.5V
- Voltage - Breakdown (Min):
- 7.22V
- Voltage - Clamping (Max) @ Ipp:
- 11.2V
- Current - Peak Pulse (10/1000µs):
- 46A
- 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)
SA6.5A FAQ
1.How can I place an order for SA6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SA6.5A 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 SA6.5A reliable?
The price and inventory of SA6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA6.5A is usually 5 days.
3.What payment methods are accepted for SA6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA6.5A?
SA6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA6.5A 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 SA6.5A?
For technical support, including SA6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA6.5A requirements.
6.How does Aetrix verify that SA6.5A is sourced from the original manufacturer or authorized distributors?
All SA6.5A 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 SA6.5A meets industry standards.
7.What is the process for return or replacement of SA6.5A?
All SA6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SA6.5A, 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 SA6.5A part is unused and in its original packaging.
Return procedure for SA6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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