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Taiwan Semiconductor Corporation SMF6.5A
- Part No.:
- SMF6.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF6.5A.pdf
- Description:
- TVS DIODE 6.5VWM 11.2VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:7,891
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Product details
Overview
SMF6.5A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 7.22–7.98 V breakdown voltage (VBR), 11.2 V clamping voltage (VC) at 500 A peak pulse current, 200 W peak pulse power (10/1000 µs), and SOD-123W package with <1 µA reverse leakage at 10 V - deployed in automotive lighting control modules and industrial sensor interfaces.
For engineers reviewing the SMF6.5A datasheet, SMF6.5A pinout, SMF6.5A application, or SMF6.5A equivalent, key selection criteria include verified clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, junction temperature rating up to +175°C, moisture sensitivity level 1 compliance, and unidirectional polarity indicated by cathode band on SOD-123W body.
Technical Context
The SMF6.5A operates as a unidirectional avalanche diode with glass-passivated junction for stable VBR tolerance and low leakage. Its clamping action begins at ~7.22 V and limits transients to ≤11.2 V at 500 A, enabling robust protection of 5 V–12 V logic and power ICs against fast-rising surges.
Thermal design relies on RθJL = 33°C/W and RθJA = 100°C/W (on 5 mm × 5 mm Cu pad), supporting continuous operation up to +175°C junction temperature. It meets JESD201 Class 2 whisker resistance and UL 94V-0 molding compound requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 10 mA | 7.22–7.98 V - defines minimum and maximum avalanche onset voltage under standard test conditions |
| VWM | 10 V - maximum continuous reverse working voltage before significant leakage begins |
| VC @ IPPM = 500 A | 11.2 V - peak clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 200 W - peak pulse power handling capability per ISO 7637-2-compliant waveform |
| IR @ VWM | ≤6.5 µA - ultra-low reverse leakage ensures minimal standby power loss in battery-powered systems |
| Junction Temp Range | −55°C to +175°C - enables deployment in under-hood automotive and industrial environments |
| Package | SOD-123W - compact surface-mount outline with matte tin-plated leads, J-STD-002 solderable |
Pinout & Package
SOD-123W is a two-terminal surface-mount package with cathode indicated by a visible band on the body. Terminals are non-polarized in layout but functionally asymmetric: anode connects to protected circuit ground or low-side return, cathode connects to line under protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system GND or low-impedance return path; establishes reference for clamping action |
| Cathode | Protected line terminal | Connected to input/output line requiring surge suppression; conducts avalanche current to anode during overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) |
| Moisture Sensitivity Level 1 | Enables standard SMT reflow without baking or special handling per J-STD-020 |
| Halogen-free construction | Meets IEC 61249-2-21, supporting RoHS-compliant and environmentally restricted applications |
| Low clamping ratio (VC/VBR) | 1.40–1.55 - delivers tight voltage limiting relative to breakdown, improving margin for 5 V–12 V ICs |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers in headlamp modules from load-dump transients and relay coil flyback. IC Role / Device Role / Timing Role: Unidirectional TVS placed between supply rail and ground, clamping surges before they reach 5 V LDOs or CAN transceivers. Use Value: Limits peak voltage to 11.2 V during 500 A pulses, preventing latch-up or gate oxide damage in 5 V–12 V logic devices. | Use Scenario: Safeguarding analog front-end amplifiers and ADC inputs in factory-floor pressure/temperature sensors exposed to EFT bursts. IC Role / Device Role / Timing Role: Placed at signal entry point to shunt fast transients (<100 ns rise time) while preserving signal integrity below 10 MHz. Use Value: Delivers <6.5 µA leakage at 10 V, minimizing offset error and power drain in precision 24-bit sensor signal chains. |
| DC Power Rail Protection | USB-C Port ESD Suppression |
Use Scenario: Guarding 12 V auxiliary power rails in infotainment head units against ignition noise and alternator ripple spikes. IC Role / Device Role / Timing Role: Mounted directly at connector entry, acting as first-line clamp before bulk capacitance and linear regulators. Use Value: Handles 200 W peak power with 175°C max junction temperature, sustaining repeated surges without thermal runaway. | Use Scenario: Providing secondary-level ESD protection on VBUS and CC lines of USB-C receptacles in portable medical devices. IC Role / Device Role / Timing Role: Positioned after primary polymer-based TVS to absorb residual energy from ±15 kV contact discharge events. Use Value: Achieves 11.2 V clamping at 500 A with <1 µA leakage above 10 V, maintaining USB-PD negotiation integrity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ6.5A (ON Semiconductor) | Same VBR range (7.22–7.98 V), but lower PPPM = 400 W; larger SMA package (RθJA = 140°C/W) | Requires PCB area increase and thermal derating above 85°C ambient | Preferred where higher pulse power margin is needed and board space allows SMA footprint |
| P6SMB6.8A (Littelfuse) | VBR min 7.56 V, VC = 11.5 V @ 500 A, same SOD-123W package, but MSL level 2 (requires baking) | Not suitable for no-bake production unless pre-baked; slightly higher clamping voltage reduces margin for 5 V ICs | Acceptable for non-high-volume assembly where MSL handling is controlled |
Compared with SMAJ6.5A and P6SMB6.8A, the SMF6.5A offers optimal balance of compact SOD-123W size, MSL-1 handling, and 11.2 V clamping - making it preferred for space-constrained automotive and industrial PCBs requiring zero-bake manufacturing and tight voltage margins.
Availability
SMF6.5A is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and DC power rail protection requiring stable component supply across extended temperature ranges and high-reliability surge immunity.
Supply support for SMF6.5A 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 Taiwanese semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMF6.5A belongs to TSC's SMF series of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient suppression in 12 V and 24 V automotive subsystems and ruggedized industrial controls.
FAQ
What is the breakdown voltage range of the SMF6.5A?
The SMF6.5A has a guaranteed breakdown voltage (VBR) range of 7.22 V to 7.98 V at IT = 10 mA, measured per JEDEC standards. This range ensures consistent avalanche initiation across production lots and supports reliable clamping behavior in 5 V–12 V systems. The SMF6.5A datasheet specifies this tolerance to allow proper margining against system operating voltages.
Does the SMF6.5A meet automotive surge immunity standards?
Yes, the SMF6.5A is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b waveforms - covering load dump, inductive switching, and capacitive coupling transients common in 12 V automotive networks. Its 200 W peak pulse power and 11.2 V clamping voltage at 500 A make the SMF6.5A suitable for front-end protection in ECUs, lighting modules, and body control units.
What is the maximum clamping voltage of the SMF6.5A under surge conditions?
The SMF6.5A exhibits a maximum clamping voltage (VC) of 11.2 V when subjected to a 10/1000 µs waveform with 500 A peak current. This value is measured per standard test conditions and represents the upper limit of voltage seen by downstream components during worst-case transients - critical for ensuring compatibility with 5 V and 12 V logic ICs. The SMF6.5A maintains this performance across its full operating temperature range.
Is the SMF6.5A compatible with lead-free reflow processes?
Yes, the SMF6.5A features matte tin-plated leads compliant with J-STD-002 and is qualified for standard lead-free reflow profiles (peak temperature up to 260°C). Its SOD-123W package carries Moisture Sensitivity Level 1 per J-STD-020, meaning it can be mounted without pre-baking - simplifying manufacturing flow and reducing risk of popcorning in high-volume SMT lines using the SMF6.5A.
How does the SMF6.5A compare to the SMF6.0A in terms of clamping performance?
The SMF6.5A clamps at 11.2 V (500 A), while the SMF6.0A clamps at 10.3 V (800 A); the higher VBR of the SMF6.5A results in slightly elevated clamping but improves immunity to false triggering near 6 V nominal rails. Both share identical SOD-123W packaging and thermal specs. Selection depends on system voltage margin: the SMF6.5A is preferred for 12 V circuits where tighter VBR tolerance avoids premature conduction.
SMF6.5A 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
SMF6.5A FAQ
1.How can I place an order for SMF6.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF6.5A 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 SMF6.5A reliable?
The price and inventory of SMF6.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF6.5A is usually 5 days.
3.What payment methods are accepted for SMF6.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF6.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF6.5A?
SMF6.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF6.5A 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 SMF6.5A?
For technical support, including SMF6.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF6.5A requirements.
6.How does Aetrix verify that SMF6.5A is sourced from the original manufacturer or authorized distributors?
All SMF6.5A 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 SMF6.5A meets industry standards.
7.What is the process for return or replacement of SMF6.5A?
All SMF6.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMF6.5A, 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 SMF6.5A part is unused and in its original packaging.
Return procedure for SMF6.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF6.5A Tags
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