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Taiwan Semiconductor Corporation SMF6.5AH
- Part No.:
- SMF6.5AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF6.5AH.pdf
- Description:
- 200W, 7.6V, 5%, UNIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:9,512
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Product details
Overview
SMF6.5AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SOD-123W package, rated for 200 W peak pulse power (10/1000 µs), 7.22–7.98 V breakdown voltage (VBR), and 11.2 V clamping voltage (VC) at 500 A peak impulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SMF6.5AH datasheet, SMF6.5AH pinout, SMF6.5AH application, or SMF6.5AH equivalent, key selection criteria include its AEC-Q101 qualification, 1 µA max reverse leakage at 6.5 V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and SOD-123W thermal performance (RθJA = 100 °C/W).
Technical Context
The SMF6.5AH operates as a unidirectional clamping device with photo-glass passivated junction for stable avalanche behavior under fast transients. Its 7.22–7.98 V VBR range ensures precise overvoltage thresholding, while the 11.2 V VC at 500 A provides low-voltage clamping to protect downstream ICs such as CAN transceivers or microcontrollers.
Thermally, it delivers RθJL = 33 °C/W and RθJC = 34 °C/W on a 5 mm × 5 mm Cu pad PCB, enabling reliable operation up to TJ = 175 °C. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 7.22–7.98 V - defines minimum and maximum avalanche initiation voltage under standardized test conditions |
| VWM | 6.5 V - maximum continuous reverse working voltage; sets safe DC operating ceiling before leakage rises |
| VC @ IPPM = 500 A | 11.2 V - clamped voltage during 10/1000 µs surge; determines protected circuit's worst-case overvoltage exposure |
| IR @ VWM | < 1 µA - ultra-low reverse leakage preserves battery life and signal integrity in always-on systems |
| PPPM | 200 W - peak pulse power handling per 10/1000 µs waveform; validates robustness against ISO 7637-2 pulses |
| TJ Range | −55 to +175 °C - extended junction temperature range supports under-hood automotive deployment |
Pinout & Package
Package: SOD-123W - surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode band polarity marking, and 0.016 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-impedance return path; enables unidirectional clamping from cathode to anode |
| Cathode | Protected line input | Connected to supply rail or signal line; absorbs positive transients by shunting current to anode when VAK exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress-test requirements including HTOL, TC, and HAST |
| Photo-glass passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliant | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (line impedance coupling) |
| SOD-123W footprint | Enables automated placement and reflow compatibility with standard SMT processes; 5 mm × 5 mm Cu pad optimizes thermal dissipation |
Applications
| Automotive Power Rail Protection | CAN Bus Transient Suppression |
|---|---|
Use Scenario: 12 V battery-fed ECUs exposed to load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and GND to clamp transients before they reach LDOs or MCUs. Use Value: Limits voltage to ≤11.2 V during 500 A surges, preventing latch-up or gate oxide damage in downstream silicon. | Use Scenario: High-speed CAN FD networks in vehicle body control modules. IC Role / Device Role / Timing Role: TVS on CAN_H/CAN_L lines to absorb ESD and coupled noise without distorting signal edges. Use Value: Sub-12 V clamping preserves common-mode margin and avoids false triggering of CAN receivers during ISO 10605 events. |
| LED Driver Input Protection | Industrial Sensor Signal Line Guarding |
Use Scenario: Constant-current LED drivers in headlamp assemblies subjected to ignition transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on driver IC input, placed upstream of input capacitor. Use Value: 200 W pulse rating handles repetitive 10/1000 µs spikes; low VC prevents overvoltage shutdown of driver ICs. | Use Scenario: 4–20 mA analog sensor interfaces in factory automation cabinets. IC Role / Device Role / Timing Role: TVS on sensor output line to suppress EFT bursts (IEC 61000-4-4) and lightning-induced surges. Use Value: 1 µA leakage at 6.5 V avoids loading precision current loops; SOD-123W size fits dense PCB layouts. |
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 VWM (6.5 V), but lower PPPM = 400 W (vs. SMF6.5AH's 200 W); SMA package (larger footprint, higher RθJA = 140 °C/W) | Less suitable for space-constrained automotive modules; better for industrial boards with larger copper areas | Choose SMAJ6.5A only if board layout allows SMA footprint and thermal budget permits higher junction rise |
| 1.5SMC6.5A | Higher PPPM = 1500 W, DO-214AB package; VC = 11.2 V same, but VBR min = 7.22 V identical; 3× larger size and weight | Targeted at heavy-duty industrial surge protection, not automotive PCB-level integration | Select 1.5SMC6.5A only when system-level surge immunity requires >1 kW capability and SOD-123W is thermally insufficient |
Compared with SMAJ6.5A and 1.5SMC6.5A, the SMF6.5AH uniquely balances AEC-Q101 qualification, SOD-123W miniaturization, and 200 W pulse rating-making it optimal for automotive ECUs where board space, thermal resistance, and qualification rigor are jointly constrained.
Availability
SMF6.5AH is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, LED lighting control, and CAN bus subsystems requiring stable component supply across production lifecycles.
Supply support for SMF6.5AH 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 validation capabilities.
The SMF6.5AH belongs to TSC's SMF-AH series of automotive-grade TVS diodes, engineered specifically for ISO 7637-2 and ISO 10605 compliance in compact, high-reliability vehicle subsystems.
FAQ
What is the clamping voltage of the SMF6.5AH under a 500 A transient?
The SMF6.5AH has a maximum clamping voltage (VC) of 11.2 V when subjected to a 10/1000 µs waveform with 500 A peak impulse current. This value is measured per standard test conditions (TA = 25 °C) and ensures downstream ICs remain within safe operating voltage limits during surge events. The SMF6.5AH maintains this clamping performance across its full operational temperature range.
Is the SMF6.5AH qualified for automotive use?
Yes, the SMF6.5AH is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life, temperature cycling, and highly accelerated stress testing. This qualification confirms its suitability for automotive applications such as body control modules, lighting systems, and infotainment power rails where reliability under harsh environmental conditions is mandatory. The SMF6.5AH also meets ISO 7637-2 Pulse 1/2a/2b/3a/3b requirements.
What is the reverse leakage current specification for SMF6.5AH at its working voltage?
The SMF6.5AH exhibits a maximum reverse leakage current (IR) of 1 µA when biased at its working stand-off voltage (VWM) of 6.5 V. This ultra-low leakage minimizes standby power loss and avoids interference in precision analog circuits or battery-powered systems. The value is guaranteed at TA = 25 °C and remains well below 5 µA across the full −55 to +125 °C operating ambient range.
Does the SMF6.5AH have polarity marking, and how is it identified?
Yes, the SMF6.5AH uses a cathode band to indicate polarity - a single dark band near one end of the SOD-123W package. The banded end is the cathode terminal, which must be connected toward the protected line (e.g., VBAT or CAN_H), while the unmarked end is the anode, tied to ground. This marking aligns with JEDEC-standard SOD-123W orientation and ensures correct unidirectional clamping function in circuit design.
What is the thermal resistance of SMF6.5AH when mounted on a standard PCB?
When mounted on a 5 mm × 5 mm copper pad PCB, the SMF6.5AH has a junction-to-ambient thermal resistance (RθJA) of 100 °C/W, a junction-to-lead resistance (RθJL) of 33 °C/W, and a junction-to-case resistance (RθJC) of 34 °C/W. These values enable effective heat dissipation during repetitive surge events and support continuous operation up to TJ = 175 °C. The SOD-123W package's low mass (0.016 g) further aids transient thermal response.
SMF6.5AH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- SOD-123W
- Series:
- SMF
- 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):
- 17.9A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
SMF6.5AH FAQ
1.How can I place an order for SMF6.5AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF6.5AH 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 SMF6.5AH reliable?
The price and inventory of SMF6.5AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF6.5AH is usually 5 days.
3.What payment methods are accepted for SMF6.5AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF6.5AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF6.5AH?
SMF6.5AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF6.5AH 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 SMF6.5AH?
For technical support, including SMF6.5AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF6.5AH requirements.
6.How does Aetrix verify that SMF6.5AH is sourced from the original manufacturer or authorized distributors?
All SMF6.5AH 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 SMF6.5AH meets industry standards.
7.What is the process for return or replacement of SMF6.5AH?
All SMF6.5AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF6.5AH, 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 SMF6.5AH part is unused and in its original packaging.
Return procedure for SMF6.5AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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