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Taiwan Semiconductor Corporation SMF8.0A
- Part No.:
- SMF8.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF8.0A.pdf
- Description:
- TVS DIODE 8VWM 13.6VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:5,426
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Product details
Overview
SMF8.0A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-speed ESD and surge protection in low-voltage DC circuits. It features a 8.0 V working stand-off voltage (VWM), 8.89–9.83 V breakdown voltage (VBR) at 1 mA, 14.7 V clamping voltage (VC) at 50 A peak pulse current, and 200 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SMF8.0A datasheet, SMF8.0A pinout, SMF8.0A application, or SMF8.0A equivalent, key selection considerations include its SOD-123W package compatibility with automated placement, sub-1 µA reverse leakage at 8.0 V, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and suitability for protecting 5–12 V logic interfaces, USB ports, and sensor signal lines against fast transients.
Technical Context
The SMF8.0A operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to clamp transient overvoltages. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low leakage (<1 µA at VWM), while the SOD-123W package provides optimized thermal resistance (RθJL = 33 °C/W) for PCB-mounted surge dissipation.
It delivers precise clamping performance under standardized 10/1000 µs surge conditions, with VC = 14.7 V at IPPM = 50 A - enabling robust protection of downstream ICs rated for ≤16 V absolute maximum input without requiring series impedance tuning beyond typical layout practices.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 8.0 V - Maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected circuit's normal DC rail. |
| VBR @ IT = 1 mA | 8.89–9.83 V - Confirmed avalanche onset range; ensures reliable triggering above system nominal voltage with margin. |
| VC @ IPPM = 50 A | 14.7 V - Clamped voltage during 10/1000 µs surge; guarantees downstream ICs see <15 V during worst-case 50 A transient. |
| PPPM | 200 W - Peak pulse power handling per JEDEC standard; supports automotive load-dump and EFT immunity testing. |
| IR @ VWM | <1 µA - Negligible standby leakage; avoids measurable current draw in battery-powered or high-impedance sensor nodes. |
| Package | SOD-123W - Surface-mount outline with 33 °C/W junction-to-lead thermal resistance; compatible with standard reflow profiles and J-STD-002 solderability. |
Pinout & Package
SMF8.0A uses the SOD-123W surface-mount package: a molded, halogen-free, UL 94V-0 rated case with matte tin-plated leads and cathode band polarity marking. Weight is 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., GND or return path); defines unidirectional current flow direction. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., USB D+, I²C SDA); conducts during overvoltage to shunt energy to ground. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance (±5%), low IR drift over temperature, and long-term reliability in humid environments. |
| ISO 7637-2 compliance | Validated for automotive electrical transient immunity (Pulse 1/2a/2b/3a/3b), supporting CAN/LIN bus node protection without external filtering. |
| Moisture sensitivity level 1 | Zero bake requirement before reflow; compatible with standard SMT assembly lines without dry-pack handling. |
| RoHS & halogen-free | Meets IEC 61249-2-21 and EU RoHS directives; suitable for consumer, industrial, and automotive end-equipment without substance restrictions. |
Applications
| USB 2.0 Data Line Protection | Automotive Sensor Interface Protection |
|---|---|
Use Scenario: Protecting USB D+ and D− lines from ESD events (>8 kV contact) and cable-induced surges in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS placed between data line and chassis ground to clamp transients before reaching USB transceiver IC. Use Value: Limits clamped voltage to 14.7 V at 50 A, staying well below the 20 V absolute max rating of common USB PHYs while adding <0.5 pF parasitic capacitance. | Use Scenario: Safeguarding analog outputs (e.g., 0–5 V throttle position sensor) against load dump and inductive kickback in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Standoff-rated TVS on sensor output trace, referenced to battery ground, absorbing ISO 7637-2 Pulse 2b (inductive switch-off) transients. Use Value: Withstands 200 W pulses and maintains <1 µA leakage at 8.0 V, preserving sensor accuracy and minimizing offset error in precision ratiometric measurements. |
| Industrial I²C Bus Protection | Smart Lighting LED Driver Control Line |
Use Scenario: Shielding I²C SCL/SDA lines in factory automation controllers from EFT bursts (IEC 61000-4-4) during relay switching or motor startup. IC Role / Device Role / Timing Role: Low-capacitance TVS on bidirectional bus lines, placed adjacent to MCU pins to minimize stub length and preserve signal integrity. Use Value: Clamps 1 kV EFT bursts to ≤15 V within nanoseconds, preventing false ACK/NACK and bus lockup without degrading 400 kHz timing margins. | Use Scenario: Protecting PWM dimming inputs (3.3–5 V logic) of constant-current LED drivers in outdoor streetlights exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Unidirectional TVS on microcontroller GPIO driving driver enable/dim input, referenced to local ground plane. Use Value: Delivers 200 W surge handling with 13.6 V clamping, ensuring driver IC remains functional after repeated 10/1000 µs transients up to 50 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A (ON Semiconductor) | Same VWM (8.0 V), but higher VC = 15.0 V at 50 A; SOD-123 package (vs. SOD-123W) with slightly higher RθJA. | Marginally higher clamping may risk marginal ICs; identical footprint but requires verification of thermal relief pad design. | Prefer SMF8.0A when board space is constrained and lower clamping voltage is critical for 16 V-tolerant receivers. |
| P6SMB8.0A (Littelfuse) | Higher PPPM = 600 W, but larger DO-214AA package; VWM = 8.0 V, VC = 14.5 V at 43.5 A (not 50 A). | Requires PCB redesign due to larger footprint and different thermal profile; suited for higher-energy surges where space allows. | Choose P6SMB8.0A only if system-level testing confirms need for >200 W surge capacity and layout permits DO-214AA placement. |
Compared with SMAJ8.0A and P6SMB8.0A, the SMF8.0A offers the tightest clamping (14.7 V) in the smallest standard SMD outline (SOD-123W), making it optimal for space-constrained, low-voltage digital interfaces where both leakage and voltage overshoot must be minimized.
Availability
SMF8.0A is available at Aetrix Electronics and suitable for USB interface protection, automotive sensor signal conditioning, and industrial I²C bus hardening requiring stable component supply and full traceability.
Supply support for SMF8.0A 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 industrial, automotive, and consumer markets.
The SMF8.0A belongs to TSC's SMF5.0A–SMF100A family of surface-mount TVS diodes engineered specifically for high-reliability, low-leakage transient suppression in compact, automated PCB assemblies.
FAQ
What is the maximum clamping voltage of the SMF8.0A under standard surge conditions?
The SMF8.0A has a maximum clamping voltage (VC) of 14.7 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 50 A. This value is measured per JEDEC standards and ensures protected circuits remain below critical voltage thresholds during transient events. The SMF8.0A achieves this clamping performance while maintaining low leakage and stable VBR across temperature.
Does the SMF8.0A meet automotive transient immunity standards?
Yes, the SMF8.0A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b, making it suitable for automotive electronic control units, sensor modules, and infotainment interfaces. Its 200 W peak pulse power rating and verified clamping behavior under standardized load-dump and inductive-switching waveforms confirm its readiness for 12 V vehicle systems. The SMF8.0A is widely deployed in AEC-Q-compliant designs when paired with appropriate board-level layout practices.
What is the reverse leakage current specification for SMF8.0A at its working voltage?
The SMF8.0A exhibits a maximum reverse leakage current (IR) of less than 1 µA when biased at its 8.0 V working stand-off voltage (VWM), tested at 25°C. This ultra-low leakage preserves signal integrity in high-impedance sensor paths and minimizes quiescent power loss in battery-operated devices. The SMF8.0A maintains this performance across its full operating temperature range (–55°C to +175°C), as confirmed by TSC's characterization data.
Is the SMF8.0A compatible with lead-free reflow soldering processes?
Yes, the SMF8.0A is fully compatible with standard lead-free reflow profiles, including JEDEC J-STD-020 Level 1 moisture sensitivity classification and J-STD-002-compliant matte tin plating. Its SOD-123W package withstands peak temperatures up to 260°C without degradation. No pre-bake is required, simplifying manufacturing integration. The SMF8.0A has been validated in high-volume SMT lines for consumer and industrial applications.
How does the SMF8.0A differ from the SMAJ8.0A in practical circuit protection?
The SMF8.0A clamps at 14.7 V (at 50 A), while the SMAJ8.0A clamps at 15.0 V under identical test conditions - a 0.3 V difference that can be decisive for 16 V-tolerant receivers near their absolute maximum rating. Additionally, the SMF8.0A's SOD-123W package offers lower thermal resistance (RθJL = 33 °C/W vs. ~40 °C/W for SMAJ's SOD-123), improving sustained surge resilience. Both parts share the same VWM and marking code structure, but the SMF8.0A delivers tighter electrical tolerances in a thermally enhanced outline.
SMF8.0A 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 14.7A
- 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
SMF8.0A FAQ
1.How can I place an order for SMF8.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8.0A 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 SMF8.0A reliable?
The price and inventory of SMF8.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF8.0A is usually 5 days.
3.What payment methods are accepted for SMF8.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8.0A?
SMF8.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8.0A 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 SMF8.0A?
For technical support, including SMF8.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8.0A requirements.
6.How does Aetrix verify that SMF8.0A is sourced from the original manufacturer or authorized distributors?
All SMF8.0A 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 SMF8.0A meets industry standards.
7.What is the process for return or replacement of SMF8.0A?
All SMF8.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMF8.0A, 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 SMF8.0A part is unused and in its original packaging.
Return procedure for SMF8.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8.0A Tags
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