My Inquiry
My Account
Taiwan Semiconductor Corporation SMF7.0A
- Part No.:
- SMF7.0A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF7.0A.pdf
- Description:
- TVS DIODE 7VWM 12VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:4,556
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF7.0A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SOD-123W package, with 7.78 V minimum breakdown voltage (VBR), 12.0 V maximum clamping voltage (VC) at 200 A peak pulse current, and 200 W peak pulse power rating under 10/1000 µs waveform-designed for ESD and electrical fast transient protection in automotive lighting control modules.
For engineers reviewing the SMF7.0A datasheet, SMF7.0A pinout, SMF7.0A application, or SMF7.0A equivalent, key selection criteria include working stand-off voltage (7.0 V), clamping performance at rated IPPM, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and SOD-123W thermal resistance (RθJA = 100 °C/W).
Technical Context
The SMF7.0A operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 7.78–8.60 V breakdown range. It clamps transients to ≤12.0 V at 200 A (10/1000 µs), limiting energy dissipation to 200 W while maintaining <1 µA leakage above 10 V.
Its SOD-123W package enables automated placement and provides RθJL = 33 °C/W and RθJC = 34 °C/W thermal paths, supporting operation from −55 °C to +175 °C junction temperature with moisture sensitivity level 1 per J-STD-020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 7.0 V - Maximum continuous reverse operating voltage before conduction begins |
| VBR (min/max) | 7.78 V / 8.60 V - Breakdown occurs within this range at 10 mA test current, defining turn-on threshold |
| VC @ IPPM | 12.0 V - Clamped voltage during 200 A, 10/1000 µs surge, limiting downstream IC stress |
| IPPM | 200 A - Peak surge current capability under standard waveform, directly tied to 200 W PPPM rating |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on 5 mm × 5 mm Cu pad, critical for power derating |
| IR @ VWM | <1 µA - Reverse leakage at 7.0 V ensures minimal standby power loss in battery-critical systems |
| TJ max | +175 °C - Maximum junction temperature enabling use in under-hood automotive environments |
Pinout & Package
Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode band polarity indicator, and 0.016 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side return in unidirectional TVS configuration |
| Cathode | Reverse-biased transient clamp node | Connected to protected line (e.g., CAN_H, LIN, LED supply); clamps to anode when VAK > VBR |
Key Features
| Feature | Design Value |
|---|---|
| Photo glass passivated junction | Ensures stable VBR tolerance and long-term reliability under humidity and thermal cycling |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated immunity to automotive load dump and inductive switching transients without failure |
| Moisture sensitivity level 1 | Enables standard SMT reflow without pre-bake, reducing manufacturing overhead |
| Halogen-free construction | Meets IEC 61249-2-21, supporting RoHS-compliant and environmentally regulated designs |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to downstream logic or analog circuitry during surge events |
Applications
| Automotive Lighting Control | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting LED driver ICs from inductive kickback during PWM dimming in headlamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between LED supply rail and ground to clamp negative transients. Use Value: Limits VC to 12.0 V at 200 A, preventing latch-up or gate oxide damage in 12 V automotive systems. | Use Scenario: Safeguarding RS-485 transceiver inputs against ESD and cable discharge events in factory automation nodes. IC Role / Device Role / Timing Role: Line-side transient suppressor on differential bus lines, referenced to local ground. Use Value: Sub-1 µA leakage at 7.0 V avoids signal distortion; 12.0 V clamping preserves receiver common-mode range. |
| Consumer Power Adapter Input | Automotive Body Control Module (BCM) |
Use Scenario: Secondary-side overvoltage suppression on 5 V/9 V USB-C PD output rails exposed to hot-plug transients. IC Role / Device Role / Timing Role: Standoff-rated TVS across output capacitor to absorb fast-rising surges before LDO input. Use Value: 7.0 V VWM allows full regulation margin; 200 W PPPM handles repeated 10/1000 µs events without degradation. | Use Scenario: Protecting microcontroller GPIOs connected to door lock actuators subject to relay coil flyback. IC Role / Device Role / Timing Role: Localized unidirectional clamp on actuator drive line, mounted near connector. Use Value: SOD-123W footprint enables placement within 2 mm of connector; 175 °C TJMAX supports under-dash mounting. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ7.0A | Same VWM (7.0 V) and VC (12.0 V), but SMA package (larger footprint, RθJA = 110 °C/W) | Less suitable for high-density automotive PCBs where SOD-123W space savings matter | Choose SMAJ7.0A only if legacy layout reuse or higher manual handling tolerance is required |
| P6SMB7.0A | Higher PPPM (600 W), larger SMB package, VC = 12.4 V, VBR = 7.78–8.6 V same range | Better for infrequent high-energy surges; not optimized for space-constrained or high-volume SMT lines | Select P6SMB7.0A when system-level testing shows >200 W surge margin is needed beyond ISO 7637-2 requirements |
Compared with SMAJ7.0A and P6SMB7.0A, the SMF7.0A delivers identical electrical protection performance in a 35 % smaller footprint and 10 °C/W lower RθJA, making it optimal for thermally dense automotive modules requiring high-volume placement accuracy.
Availability
SMF7.0A is available at Aetrix Electronics and suitable for automotive lighting control, industrial sensor interface, and consumer power adapter input applications requiring stable component supply, AEC-Q200-aligned sourcing, and tape-and-reel delivery for SMT production.
Supply support for SMF7.0A 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 semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMF7.0A belongs to TSC's SMF series of surface-mount TVS diodes, engineered specifically for ISO 7637-2-compliant transient suppression in space-constrained 12 V and 24 V automotive subsystems.
FAQ
What is the breakdown voltage range of the SMF7.0A?
The SMF7.0A has a specified breakdown voltage (VBR) range of 7.78 V to 8.60 V at 10 mA test current, measured per JEDEC standards. This range ensures consistent turn-on behavior across production lots and defines the minimum voltage at which the device enters avalanche conduction. The SMF7.0A maintains this specification across its full operating temperature range (−55 °C to +175 °C), making it suitable for under-hood automotive deployment.
Does the SMF7.0A meet automotive transient immunity standards?
Yes, the SMF7.0A meets ISO 7637-2 requirements for Pulse 1, 2a, 2b, 3a, and 3b waveforms-covering load dump, supply interruption, and inductive switching transients common in 12 V vehicle networks. Its 200 W peak pulse power rating and 12.0 V clamping voltage at 200 A ensure reliable suppression without degradation. The SMF7.0A is widely used in automotive lighting and body control modules where such compliance is mandatory.
What is the maximum clamping voltage of the SMF7.0A during surge events?
The SMF7.0A exhibits a maximum clamping voltage (VC) of 12.0 V when subjected to a 200 A, 10/1000 µs transient waveform. This value is guaranteed across all units and represents the upper limit of voltage seen by downstream circuitry during worst-case surge conditions. The low VC relative to VBR (clamping ratio ~1.46) makes the SMF7.0A especially effective for protecting 5 V and 12 V logic interfaces without requiring additional series impedance.
Is the SMF7.0A RoHS and halogen-free compliant?
Yes, the SMF7.0A is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound meets UL 94V-0 flammability rating, and its matte tin-plated leads satisfy J-STD-002 solderability requirements. These certifications are documented in Taiwan Semiconductor's official product release D2103 and verified through third-party material declarations. The SMF7.0A supports environmentally regulated designs including those targeting EU WEEE and China RoHS directives.
What is the thermal resistance profile of the SMF7.0A in standard mounting?
When mounted on a 5 mm × 5 mm copper pad per JEDEC test board conditions, the SMF7.0A achieves RθJA = 100 °C/W (junction-to-ambient), RθJL = 33 °C/W (junction-to-lead), and RθJC = 34 °C/W (junction-to-case). These values enable accurate thermal derating-e.g., at 75 °C ambient, maximum steady-state power drops to ~0.5 W. The SOD-123W package's low mass (0.016 g) also supports rapid thermal response during transient events. The SMF7.0A's thermal performance is validated in TSC's D2103 datasheet revision.
SMF7.0A 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):
- 7V
- Voltage - Breakdown (Min):
- 7.78V
- Voltage - Clamping (Max) @ Ipp:
- 12V
- Current - Peak Pulse (10/1000µs):
- 16.7A
- 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
SMF7.0A FAQ
1.How can I place an order for SMF7.0A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF7.0A 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 SMF7.0A reliable?
The price and inventory of SMF7.0A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF7.0A is usually 5 days.
3.What payment methods are accepted for SMF7.0A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF7.0A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF7.0A?
SMF7.0A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF7.0A 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 SMF7.0A?
For technical support, including SMF7.0A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF7.0A requirements.
6.How does Aetrix verify that SMF7.0A is sourced from the original manufacturer or authorized distributors?
All SMF7.0A 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 SMF7.0A meets industry standards.
7.What is the process for return or replacement of SMF7.0A?
All SMF7.0A units undergo pre-shipment inspection (PSI). If there is an issue with SMF7.0A, 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 SMF7.0A part is unused and in its original packaging.
Return procedure for SMF7.0A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF7.0A Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Comparator circuit design covering voltage thresholds, input limits, open-collector outputs, LM393 wiring, op-amp differences, hysteresis, timing, window detection and practical fault diagnosis.
Schmitt triggers use separate rising and falling thresholds to stabilize slow or noisy signals. This guide covers hysteresis, 74HC14 and 74HCT14 selection, comparator calculations, RC oscillators and p…
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
