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Taiwan Semiconductor Corporation SMF13A
- Part No.:
- SMF13A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF13A.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:19,830
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Product details
Overview
SMF13A 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), 13 V working stand-off voltage (VWM), 14.4–15.9 V breakdown voltage (VBR), and clamps transients to ≤21.5 V at 9.3 A peak impulse current - used for ESD and inductive switching protection in automotive lighting control modules.
For engineers reviewing the SMF13A datasheet, SMF13A pinout, SMF13A application, or SMF13A equivalent, key selection criteria include clamping voltage under specified IPPM, reverse leakage (<1 µA @ 13 V), thermal resistance (RθJL = 33 °C/W), ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, and SOD-123W board-level mounting compatibility.
Technical Context
The SMF13A operates as a unidirectional avalanche diode with glass-passivated junction, designed to clamp fast-rising transients by entering avalanche breakdown when reverse voltage exceeds VBR (min 14.4 V, max 15.9 V). It exhibits low forward voltage (3.5 V @ 12 A) and maintains <1 µA reverse leakage at its 13 V stand-off rating.
Its thermal design supports operation from –55 °C to +175 °C junction temperature, with RθJL = 33 °C/W enabling effective heat transfer to PCB copper pads (5 mm × 5 mm), and it meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1 requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR @ IT = 1 mA | 14.4–15.9 V - guaranteed avalanche onset range defining turn-on threshold |
| VC @ IPPM = 9.3 A | ≤21.5 V - clamped voltage during 10/1000 µs surge, limiting stress on downstream ICs |
| PPPM | 200 W - peak pulse power handling per 10/1000 µs waveform (≥60 V VWM variants rated 175 W) |
| IR @ VWM | <1 µA - minimal leakage ensures negligible standby power loss in high-impedance circuits |
| RθJL | 33 °C/W - enables reliable thermal dissipation into PCB copper pad without heatsink |
| Junction Temp Range | –55 °C to +175 °C - supports under-hood automotive and industrial ambient conditions |
Pinout & Package
Package: SOD-123W - surface-mount plastic case with matte tin-plated leads, UL 94V-0 molding compound, cathode indicated by band, weight ≈ 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 12 V rail); conducts avalanche current to anode during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge stress |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Validated for automotive load-dump and inductive-switching immunity per OEM requirements |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage margin between clamping and IC absolute maximum ratings |
| SOD-123W footprint | Enables automated placement and reflow soldering with industry-standard 5 mm × 5 mm Cu pad layout |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and environmental regulations for global electronics manufacturing |
Applications
| Automotive Lighting Control | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and microcontrollers from load-dump spikes and relay coil flyback in headlamp and tail lamp modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across 12 V supply rail to clamp transients before they reach sensitive logic and gate drivers. Use Value: Clamps 10/1000 µs surges to ≤21.5 V at 9.3 A, preventing latch-up or permanent damage to 3.3 V/5 V logic powered from same rail. | Use Scenario: Safeguarding digital input channels of programmable logic controllers against EFT bursts and field-wiring induced transients. IC Role / Device Role / Timing Role: TVS connected between signal line and common reference to shunt fast transients before reaching optocoupler or level-shifter inputs. Use Value: Sub-1 µA leakage at 13 V avoids false triggering in high-impedance sensing circuits while maintaining fast response (<1 ns). |
| USB-C Power Delivery Interface | DC Motor Driver Feedback Line |
Use Scenario: Protecting CC and VCONN pins in USB-C receptacles from ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS placed on each CC line referenced to ground, leveraging low capacitance and fast clamping. Use Value: Meets IEC 61000-4-2 Level 4 (±15 kV air, ±8 kV contact) with clamping below 22 V, preserving PD controller communication integrity. | Use Scenario: Shielding analog current-sense amplifier inputs from commutation noise generated by brushed DC motors. IC Role / Device Role / Timing Role: TVS installed across sense resistor terminals to clamp inductive kickback coupled onto feedback path. Use Value: 21.5 V clamping limits amplifier input excursion within its ±25 V absolute max rating, avoiding saturation or damage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ13A | Higher PPPM (600 W), larger SMB package (4.58 × 3.94 mm vs. SOD-123W's 2.7 × 1.6 mm), higher VC (21.5 V → 24.4 V) | Better suited for higher-energy surges; requires larger PCB area and different pad layout | Select SMBJ13A only if system-level testing shows 200 W insufficient and board space allows SMB footprint |
| P4SMA13A | Same VWM/VBR, but lower PPPM (400 W), DO-214AC package, higher RθJA (110 °C/W vs. 100 °C/W) | Compatible for medium-energy transients; less thermally efficient on small pads | Prefer P4SMA13A only when legacy DO-214AC assembly lines are in use and thermal margin permits |
Compared with SMBJ13A and P4SMA13A, the SMF13A delivers optimal balance of compact SOD-123W size, 200 W surge capability, and low 33 °C/W junction-to-lead resistance - making it ideal for space-constrained automotive and industrial PCBs where thermal coupling to copper is prioritized over raw power rating.
Availability
SMF13A is available at Aetrix Electronics and suitable for automotive lighting control, industrial PLC I/O protection, USB-C power delivery interface hardening, and DC motor driver feedback line safeguarding requiring stable component supply across production lifecycles.
Supply support for SMF13A 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 SMF13A belongs to TSC's SMF series of surface-mount TVS diodes engineered specifically for ISO 7637-2-compliant transient suppression in space-sensitive 12 V/24 V systems - emphasizing low leakage, tight VBR tolerance, and robust glass-passivated junctions.
FAQ
What is the maximum clamping voltage of the SMF13A under standard test conditions?
The SMF13A has a maximum clamping voltage (VC) of 21.5 V when subjected to a 10/1000 µs waveform with a peak impulse current (IPPM) of 9.3 A. This value is measured per JEDEC standards and reflects the actual voltage seen by downstream circuitry during surge events - critical for ensuring compatibility with ICs rated for ≤25 V absolute maximum input.
Does the SMF13A meet automotive transient immunity standards?
Yes, the SMF13A meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b requirements for electrical disturbances in road vehicles. Its 200 W peak pulse power rating, low clamping voltage, and verified performance under standardized load-dump and inductive-switching waveforms make it suitable for automotive body control modules and lighting systems per OEM specifications.
What is the reverse leakage current specification for SMF13A at its working stand-off voltage?
The SMF13A exhibits a maximum reverse leakage current (IR) of less than 1 µA when biased at its 13 V working stand-off voltage (VWM). This ultra-low leakage preserves signal integrity in high-impedance monitoring circuits and minimizes standby power loss in battery-powered applications - confirmed per TSC datasheet revision D2103.
Can SMF13A be used in bidirectional configurations?
No, the SMF13A is a unidirectional TVS diode and must be used with correct polarity - cathode connected to the protected line, anode to reference (e.g., ground). For bidirectional protection, two SMF13A devices may be connected in series opposing, but TSC does not characterize or guarantee performance in that configuration; dedicated bidirectional parts like SMBJ13CA are recommended instead.
What is the thermal resistance from junction to lead (RθJL) for SMF13A, and why does it matter?
The SMF13A has a junction-to-lead thermal resistance (RθJL) of 33 °C/W when mounted on a 5 mm × 5 mm copper pad. This low value enables efficient heat transfer from the die to the PCB during repetitive surge events, reducing thermal stress and extending device lifetime - especially important in automotive under-hood environments where ambient temperatures exceed 105 °C.
SMF13A 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):
- 13V
- Voltage - Breakdown (Min):
- 14.4V
- Voltage - Clamping (Max) @ Ipp:
- 21.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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
SMF13A FAQ
1.How can I place an order for SMF13A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13A 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 SMF13A reliable?
The price and inventory of SMF13A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF13A is usually 5 days.
3.What payment methods are accepted for SMF13A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13A?
SMF13A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13A 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 SMF13A?
For technical support, including SMF13A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13A requirements.
6.How does Aetrix verify that SMF13A is sourced from the original manufacturer or authorized distributors?
All SMF13A 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 SMF13A meets industry standards.
7.What is the process for return or replacement of SMF13A?
All SMF13A units undergo pre-shipment inspection (PSI). If there is an issue with SMF13A, 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 SMF13A part is unused and in its original packaging.
Return procedure for SMF13A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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