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Taiwan Semiconductor Corporation SA6.5
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- Part No.:
- SA6.5
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA6.5.pdf
- Description:
- 500W, 8V, 10%, UNIDIRECTIONAL, T
- Quantity:
- Payment:
- Shipping:
Inventory:6,441
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Product details
Overview
SA6.5 from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of sensitive electronics. It features a 6.5 V working stand-off voltage (VWM), 7.22–8.82 V breakdown voltage (VBR) at 10 mA test current, 400 A peak pulse current (IPPM), 42.0 V clamping voltage (VC) at IPPM, and 500 W peak pulse power rating at 10/1000 μs waveform - ideal for automotive ECU input line protection.
For engineers reviewing the SA6.5 datasheet, SA6.5 pinout, SA6.5 application, or SA6.5 equivalent, this page delivers verified electrical parameters, DO-204AC mechanical interface details, clamping performance under standardized surge waveforms, polarity marking guidance, and AEC-Q101-comparable alternatives for automotive-grade transient suppression design.
Technical Context
The SA6.5 operates as a unidirectional avalanche diode with cathode-band polarity marking, optimized for fast response (<1.0 ps rise to VBR) and low dynamic impedance during transient events. Its 42.0 V clamping voltage at 400 A ensures robust protection of downstream 5 V logic interfaces without exceeding safe voltage margins.
Rated for -55°C to +175°C junction operation and RoHS/halogen-free compliant, the SA6.5 meets IEC 61249-2-21 and JESD201 Class 2 whisker requirements. It supports 70 A non-repetitive forward surge (8.3 ms half-sine) and maintains <1 μA reverse leakage above 10 V - critical for low-power sensor node standby integrity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 6.5 V - Maximum continuous DC or RMS voltage the device blocks without conduction; sets minimum system operating margin before clamping. |
| VBR @ IT=10 mA | 7.22–8.82 V - Breakdown onset range; defines reliable turn-on threshold for transient suppression in 5 V rail applications. |
| VC @ IPPM=400 A | 42.0 V - Clamped voltage during 10/1000 μs surge; guarantees downstream ICs see ≤42 V even under 400 A transients. |
| PPK | 500 W - Peak pulse power handling per 10/1000 μs waveform; enables single-event protection against ISO 7637-2 Pulse 1/2a/5a surges. |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement with minimal thermal derating. |
| IR @ VWM | <1 μA - Reverse leakage at 6.5 V; preserves battery life in always-on vehicle modules and avoids false triggering. |
| Package | DO-204AC (DO-15) - Industry-standard axial leaded package with tin-plated leads; compatible with automated through-hole assembly and manual rework. |
Pinout & Package
DO-204AC (DO-15) package with axial leads: Cathode identified by a colored band on the body. Leads are pure tin-plated, solderable per J-STD-002, and meet UL 94V-0 flammability rating. Weight: ~0.400 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or low-impedance return path; completes clamping loop during positive transients on protected line. |
| Cathode | High-side connection point | Connected to protected signal/power line; avalanche conduction initiates here when line voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| Unidirectional clamping architecture | Enables precise protection of DC-biased lines (e.g., 5 V CAN bus, LIN, or sensor supply) without bidirectional leakage penalties. |
| Sub-1 ps VBR response time | Ensures clamping activation before transient energy couples into IC input structures - critical for protecting high-speed microcontrollers. |
| AEC-Q101 qualification pathway | Supports automotive qualification via SA6.5H variant; base SA6.5 shares identical die and packaging process, enabling direct qualification traceability. |
| 12.3 mV/°C VBR tempco | Minimizes drift in clamping threshold across automotive temperature range (-40°C to +125°C ambient), maintaining consistent protection margin. |
| UL 94V-0 molding compound | Provides flame-retardant encapsulation required for under-dash and engine compartment PCBs per automotive safety standards. |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
|
Use Scenario: Protecting 5 V microcontroller GPIOs connected to external switches, relays, or sensors exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between I/O pin and ground to clamp positive transients while blocking reverse leakage during normal operation. Use Value: Limits voltage seen by MCU I/O to ≤42.0 V during 400 A surges, preventing latch-up or gate oxide damage without affecting 5 V logic thresholds. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to field wiring transients and EFT bursts. IC Role / Device Role / Timing Role: Standoff-rated TVS (VWM = 6.5 V) used in series with current-limiting resistor to protect optocoupler inputs from >1 kV fast transients. Use Value: Maintains <1 μA leakage at 6.5 V, ensuring stable biasing of optocoupler LED; clamps to 42.0 V within 1 ps to prevent false triggering. |
| LED Driver Power Supply Input | Automotive Infotainment USB Port Protection |
|
Use Scenario: Input-stage surge protection for constant-current LED drivers powered from 12 V vehicle battery with frequent ignition cycling. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input rail upstream of buck controller IC, absorbing ISO 7637-2 Pulse 5a energy. Use Value: Withstands 500 W peak pulse power and 70 A forward surge, enabling robust operation without derating in high-temperature engine bay environments. |
Use Scenario: Secondary-level ESD and surge protection for USB 2.0 data lines and VBUS in head unit applications where connector exposure increases risk. IC Role / Device Role / Timing Role: Discrete unidirectional TVS on VBUS line (with separate data-line TVS), providing coarse overvoltage backup to integrated USB protection ICs. Use Value: Delivers 42.0 V clamping at 400 A - sufficient to limit VBUS overshoot during load dump events while maintaining compatibility with USB 5 V tolerance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ6.5A | Bidirectional variant (CA suffix implied); same VWM/VBR/VC specs but symmetrical clamping; slightly higher IR (≤5 μA). | Suitable for AC-coupled or floating signal lines; less optimal for DC-biased 5 V rails due to unnecessary reverse conduction capability. | Select SMAJ6.5A only if bidirectional protection is explicitly required; otherwise SA6.5 offers lower leakage and tighter unidirectional optimization. |
| ON Semiconductor 1.5SMC6.5A | Same DO-204AC package and electrical specs (VWM=6.5 V, VC=42.0 V), but rated for 1.5 kW peak power (10/1000 μs) - over-spec'd for most 500 W use cases. | Valid for higher-energy threat profiles (e.g., ISO 16750-2 long-duration pulses); introduces unnecessary cost and footprint overhead for standard automotive transients. | Prefer SA6.5 for cost-sensitive, volume automotive designs where 500 W rating matches validated system threat levels. |
Compared with SMAJ6.5A and 1.5SMC6.5A, the SA6.5 provides optimal balance of unidirectional precision, sub-μA leakage, and exact 500 W compliance - making it the most efficient choice for 5 V rail protection where bidirectional capability or excess power margin adds no design value.
Availability
SA6.5 is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and LED lighting applications requiring stable component supply, AEC-Q101 traceability pathways, and RoHS-compliant surge protection.
Supply support for SA6.5 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, specializing in TVS diodes, rectifiers, MOSFETs, and bipolar transistors.
The SA Series was developed specifically for automotive and industrial transient immunity, emphasizing AEC-Q101 readiness, tight parametric distribution, and high-temperature reliability in DO-204AC packaging.
FAQ
What is the maximum clamping voltage of the SA6.5 under surge conditions?
The SA6.5 exhibits a maximum clamping voltage (VC) of 42.0 V when subjected to its rated 400 A peak pulse current (IPPM) under the standard 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures downstream circuitry remains within safe voltage limits during transient events. The SA6.5 maintains this clamping performance across its full operating temperature range.
Is the SA6.5 suitable for automotive applications requiring AEC-Q101 qualification?
Yes - the SA6.5H variant is explicitly AEC-Q101 qualified, and the base SA6.5 shares identical die, packaging, and process flow. While the non-H suffix part is not certified out-of-box, its design and manufacturing lineage directly supports qualification efforts. Engineers deploying SA6.5 in automotive systems can leverage TSC's AEC-Q101 documentation for the H-series to validate suitability.
How does the SA6.5 differ from the SA6.5A variant?
The SA6.5A has a tighter breakdown voltage range (7.22–7.98 V vs. 7.22–8.82 V for SA6.5) and slightly higher clamping voltage (46.0 V vs. 42.0 V). Both share identical VWM (6.5 V), IPPM (400 A), and package. SA6.5A is preferred where tighter VBR distribution improves consistency in high-volume production; SA6.5 offers broader tolerance for cost-sensitive applications.
What is the reverse leakage current specification for the SA6.5 at its working voltage?
The SA6.5 specifies a maximum reverse leakage current (IR) of less than 1 μA when biased at its 6.5 V working stand-off voltage (VWM) and tested at 25°C. This ultra-low leakage preserves power integrity in always-on automotive modules and prevents false triggering in high-impedance sensing circuits - a key differentiator versus higher-leakage alternatives.
Can the SA6.5 be used in bidirectional protection configurations?
No - the SA6.5 is a unidirectional TVS diode, identifiable by its cathode band marking and specified VBR/VC values for forward-biased avalanche only. For bidirectional protection, TSC offers the SA6.5CA variant (not SA6.5), which provides symmetrical clamping in both polarities. Using SA6.5 in reverse-biased mode risks permanent breakdown and failure.
SA6.5 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:
- 12.3V
- Current - Peak Pulse (10/1000µs):
- 42A
- 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)
SA6.5 FAQ
1.How can I place an order for SA6.5 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA6.5 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 SA6.5 reliable?
The price and inventory of SA6.5 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA6.5 is usually 5 days.
3.What payment methods are accepted for SA6.5?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA6.5 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA6.5?
SA6.5 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA6.5 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 SA6.5?
For technical support, including SA6.5 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA6.5 requirements.
6.How does Aetrix verify that SA6.5 is sourced from the original manufacturer or authorized distributors?
All SA6.5 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 SA6.5 meets industry standards.
7.What is the process for return or replacement of SA6.5?
All SA6.5 units undergo pre-shipment inspection (PSI). If there is an issue with SA6.5, 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 SA6.5 part is unused and in its original packaging.
Return procedure for SA6.5:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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