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Taiwan Semiconductor Corporation SMF7.5A
- Part No.:
- SMF7.5A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF7.5A.pdf
- Description:
- TVS DIODE 7.5VWM 12.9VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:3,267
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Product details
Overview
SMF7.5A from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for high-speed clamping of ESD and inductive switching transients in power rails and I/O lines. It features a 7.5 V working stand-off voltage (VWM), 8.33–9.21 V breakdown voltage (VBR), 15.5 V maximum clamping voltage (VC) at 100 A peak pulse current, and 200 W peak pulse power (10/1000 µs). It is used in automotive lighting control modules and industrial sensor interfaces requiring robust ISO 7637-2 Pulse 1/2a/2b/3a/3b immunity.
For engineers reviewing the SMF7.5A datasheet, SMF7.5A pinout, SMF7.5A application, or SMF7.5A equivalent, key selection criteria include clamping performance under 100 A transient stress, thermal resistance (RθJA = 100 °C/W), SOD-123W package compatibility with automated placement, and compliance with RoHS and halogen-free standards per IEC 61249-2-21.
Technical Context
The SMF7.5A operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable leakage (<1 µA at VWM) and long-term reliability under repeated surge events.
It delivers 200 W peak pulse power (10/1000 µs waveform) with a maximum clamping voltage of 15.5 V at 100 A, enabling protection of 3.3 V and 5 V logic circuits without overvoltage damage. Thermal performance is characterized by RθJL = 33 °C/W and RθJA = 100 °C/W on a 5 mm × 5 mm Cu pad PCB.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.5 V - Maximum continuous reverse operating voltage before clamping begins; ensures no conduction during normal 5 V rail operation. |
| VBR min/max | 8.33 V / 9.21 V - Breakdown occurs within this range at 1 mA test current; defines precise turn-on threshold for transient response. |
| VC @ IPPM | 15.5 V - Clamped voltage at 100 A peak pulse; limits downstream IC voltage stress below 16 V during ISO 7637-2 Pulse 2b. |
| PPPM | 200 W - Peak pulse power handling (10/1000 µs); supports high-energy transients in automotive load-dump scenarios. |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; minimizes quiescent power loss in battery-powered systems. |
| TJ max | +175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard PCB; informs derating requirements above 25 °C ambient. |
Pinout & Package
Package: SOD-123W - Surface-mount plastic package with matte tin-plated leads, UL 94V-0 molding compound, and cathode band polarity marking. Weight: 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to protected line (e.g., 5 V rail or signal trace) in unidirectional configuration. |
| Cathode | Reverse-biased clamping terminal | Connected to ground reference; conducts transient current when Vreverse exceeds VBR. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and low IR drift over temperature and lifetime, critical for automotive-grade reliability. |
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (switching noise), meeting OEM-level EMC requirements. |
| SOD-123W footprint | Enables high-density PCB layout and compatibility with standard pick-and-place equipment; no rework needed for existing SOD-123 designs. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU, supporting green manufacturing and export compliance. |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontroller I/O pins from load-dump transients in headlight and tail-light modules. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power input and ground to limit voltage excursions during 12 V system surges. Use Value: Limits clamped voltage to 15.5 V at 100 A, preventing latch-up or gate oxide damage in 5 V logic devices downstream. | Use Scenario: Safeguarding RS-485 transceivers and analog front-end amplifiers in factory automation sensors exposed to inductive switching noise. IC Role / Device Role / Timing Role: Fast-response transient suppressor on data line and supply rail to absorb EFT bursts per IEC 61000-4-4. Use Value: Achieves <1 µA leakage at 7.5 V, preserving signal integrity and minimizing offset error in precision 24 V sensor circuits. |
| Consumer Power Adapter | Smart Meter Communication Port |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters against lightning-induced surges on DC output lines. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V or +12 V output rail to clamp transients before they reach USB or display controller ICs. Use Value: 200 W peak power rating sustains multiple 10/1000 µs pulses without degradation, extending adapter field life. | Use Scenario: ESD protection for PLC and RF communication ports (e.g., NB-IoT, LoRa) in utility smart meters deployed in electrically noisy substations. IC Role / Device Role / Timing Role: Primary-line TVS on meter's isolated power and data coupling circuits to meet IEC 61000-4-2 Level 4 (±15 kV air). Use Value: Low capacitance and fast response (<1 ns) prevent signal distortion on 100 kbps+ communication buses while maintaining 7.5 V system margin. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.5A | Higher RθJA (140 °C/W), lower PPPM (400 W but rated at 10/1000 µs with different derating curve), same SOD-123 package. | Less suitable for high-ambient-temperature automotive under-hood use due to higher thermal resistance. | Prefer SMF7.5A where board space is constrained and thermal management is limited. |
| P6SMB7.5A | DO-214AA package (larger footprint), higher VBR tolerance (±5%), 600 W PPPM, higher VC (12.9 V @ 43.3 A). | Better for high-current industrial surge events but requires PCB redesign and larger keep-out area. | Choose P6SMB7.5A only when >40 A peak current capability is required and SOD-123W footprint is not mandatory. |
Compared with SMAJ7.5A and P6SMB7.5A, the SMF7.5A offers optimal balance of compact SOD-123W packaging, 100 °C/W thermal resistance, and precise 15.5 V clamping at 100 A-making it ideal for space-constrained, thermally sensitive 5 V/12 V automotive and industrial control nodes.
Availability
SMF7.5A is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and consumer power adapter designs requiring stable component supply, consistent parametric performance, and full traceability across production batches.
Supply support for SMF7.5A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs, with global distribution and AEC-Q101 qualified product lines.
The SMF7.5A belongs to TSC's SMF series of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient protection in automotive and industrial power systems where small size, low leakage, and repeatable clamping are critical.
FAQ
What is the maximum clamping voltage of the SMF7.5A at its rated peak pulse current?
The SMF7.5A has a maximum clamping voltage (VC) of 15.5 V when subjected to its rated peak pulse current of 100 A with a 10/1000 µs waveform. This value is measured per the conditions specified in the official Taiwan Semiconductor datasheet Version D2103 and ensures safe operation of downstream 5 V logic components during transient events.
Does the SMF7.5A meet automotive EMC standards such as ISO 7637-2?
Yes, the SMF7.5A is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test waveforms. This qualification is documented in the Taiwan Semiconductor SMF5.0A–SMF100A datasheet (Version D2103) and confirms its suitability for protecting ECUs, lighting modules, and body control units in 12 V automotive systems.
What is the package type and mounting compatibility of the SMF7.5A?
The SMF7.5A uses the SOD-123W surface-mount package with matte tin-plated leads, compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Its dimensions and pad layout match industry-standard SOD-123 footprints, enabling drop-in replacement in automated assembly lines without retooling.
How does the SMF7.5A compare to the SMF6.0A in terms of working voltage and clamping performance?
The SMF7.5A has a higher working stand-off voltage (7.5 V vs. 6.0 V) and higher breakdown voltage (8.33–9.21 V vs. 6.67–7.37 V) than the SMF6.0A, making it better suited for 7–8 V nominal rails. Its clamping voltage is 15.5 V at 100 A, compared to 10.3 V at 800 A for SMF6.0A-reflecting trade-offs between voltage margin and surge current capacity.
Is the SMF7.5A halogen-free and RoHS compliant?
Yes, the SMF7.5A is both halogen-free per IEC 61249-2-21 and RoHS compliant per EU Directive 2011/65/EU. These environmental qualifications are confirmed in the "Features" section of the Taiwan Semiconductor SMF5.0A–SMF100A datasheet (Version D2103) and verified through material declarations.
SMF7.5A 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):
- 7.5V
- Voltage - Breakdown (Min):
- 8.33V
- Voltage - Clamping (Max) @ Ipp:
- 12.9V
- Current - Peak Pulse (10/1000µs):
- 15.5A
- 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
SMF7.5A FAQ
1.How can I place an order for SMF7.5A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF7.5A 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 SMF7.5A reliable?
The price and inventory of SMF7.5A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF7.5A is usually 5 days.
3.What payment methods are accepted for SMF7.5A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF7.5A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF7.5A?
SMF7.5A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF7.5A 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 SMF7.5A?
For technical support, including SMF7.5A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF7.5A requirements.
6.How does Aetrix verify that SMF7.5A is sourced from the original manufacturer or authorized distributors?
All SMF7.5A 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 SMF7.5A meets industry standards.
7.What is the process for return or replacement of SMF7.5A?
All SMF7.5A units undergo pre-shipment inspection (PSI). If there is an issue with SMF7.5A, 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 SMF7.5A part is unused and in its original packaging.
Return procedure for SMF7.5A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF7.5A Tags
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