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Taiwan Semiconductor Corporation SMF13AH
- Part No.:
- SMF13AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF13AH.pdf
- Description:
- TVS DIODE 13VWM 21.5VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:3,463
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Product details
Overview
SMF13AH 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), and 21.5 V maximum clamping voltage (VC) at 9.3 A peak impulse current - designed for automotive-grade ESD and load-dump protection in power supply rails and signal lines.
For engineers reviewing the SMF13AH datasheet, SMF13AH pinout, SMF13AH application, or SMF13AH equivalent, key selection criteria include its AEC-Q101 qualification, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, low leakage (<1 µA @ 13 V), and robust thermal performance (RθJA = 100 °C/W) on standard PCB pads.
Technical Context
The SMF13AH operates as a unidirectional avalanche-clamping TVS diode with photo-glass passivated junction, enabling fast response to transients while maintaining stable breakdown behavior across temperature. Its 14.4–15.9 V breakdown voltage (VBR @ 1 mA) ensures reliable turn-on before system-level damage thresholds.
Designed for automotive electronics, it meets stringent immunity standards including ISO 7637-2 and supports operation from −55 °C to +175 °C junction temperature, with moisture sensitivity level (MSL) 1 and halogen-free construction per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 13 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC rail margin. |
| VBR min/max | 14.4 V / 15.9 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on under transient stress. |
| VC @ IPPM | 21.5 V @ 9.3 A - Clamped voltage during 10/1000 µs surge; limits downstream IC voltage stress. |
| PPPM | 200 W - Peak pulse power handling capability; validated per JEDEC-standard waveform. |
| IR @ VWM | <1 µA - Ultra-low reverse leakage; minimizes standby power loss in battery-critical systems. |
| TJ max | +175 °C - Maximum junction temperature; enables under-hood deployment without derating. |
| RθJA | 100 °C/W - Thermal resistance to ambient on 5 mm × 5 mm Cu pad; informs board-level thermal design. |
Pinout & Package
Package: SOD-123W - Surface-mount plastic case with matte tin-plated leads, UL 94V-0 rated molding compound, cathode band polarity marking, and 0.016 g typical weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias | Connected to protected line's lower-potential side (e.g., ground return path in uni-directional clamp). |
| Cathode | Current exit point in forward bias; marked by band | Connected to protected line's higher-potential side (e.g., 12 V rail); defines clamping directionality. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive use per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
| Photo-glass passivated junction | Enhances long-term reliability and stability of VBR under humidity and thermal cycling. |
| ISO 7637-2 compliant | Withstands defined automotive transients: Pulse 1 (inductive load dump), Pulse 2a/2b (switching spikes), Pulse 3a/3b (ESD-related coupling). |
| Low clamping ratio (VC/VBR) | ~1.42 (21.5 V / 15.15 V avg) - Tighter voltage control than generic TVS devices, reducing overvoltage margin needed. |
| MSL Level 1 | No floor life limitation or bake requirement prior to reflow; supports standard SMT assembly without special handling. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load-dump surges up to ±100 V per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground to clamp transients before they reach LDOs or microcontrollers. Use Value: Limits rail voltage to ≤21.5 V during 9.3 A surge, preventing latch-up or permanent damage to downstream 3.3 V/5 V logic. | Use Scenario: Shielding analog sensor inputs (e.g., pressure, temperature) from EFT bursts in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, preserving signal integrity while diverting fast transients. Use Value: Sub-1 µA leakage avoids DC offset errors; 21.5 V clamping prevents op-amp input stage saturation during 1 kV EFT events. |
| LED Lighting Driver Protection | Automotive CAN Transceiver Protection |
Use Scenario: Safeguarding constant-current LED drivers from inductive kickback when switching high-side MOSFETs. IC Role / Device Role / Timing Role: TVS connected across driver output to absorb energy from flyback voltage spikes. Use Value: 200 W peak power rating handles repetitive 10/1000 µs pulses without degradation; SOD-123W footprint fits tight layout constraints. | Use Scenario: Adding secondary protection to CANH/CANL lines beyond built-in transceiver ESD clamps. IC Role / Device Role / Timing Role: External uni-directional TVS on each CAN line referenced to ground, enhancing system-level EMC robustness. Use Value: AEC-Q101 qualification ensures compatibility with automotive CAN bus timing margins; 13 V VWM avoids interference with nominal 2.5–3.5 V differential signaling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ13A | Same VWM (13 V), but lower PPPM (400 W vs. SMF13AH's 200 W); larger SMA package (vs. SOD-123W). | Higher surge capacity suits infrequent high-energy events; less suitable for space-constrained automotive modules. | Choose SMAJ13A only if board area allows SMA footprint and higher peak power is required. |
| 1.5SMC13A | Same VWM, but DO-214AB package (larger), 1500 W PPPM, higher VC (24.4 V), and no AEC-Q101 qualification. | Used in industrial power supplies where automotive qualification is unnecessary and higher surge tolerance is prioritized. | Select 1.5SMC13A for non-automotive, high-energy environments where MSL 1 and compact size are not critical. |
Compared with SMAJ13A and 1.5SMC13A, the SMF13AH delivers optimal balance of AEC-Q101 compliance, SOD-123W miniaturization, and precise 21.5 V clamping - making it the preferred choice for volume automotive electronics where footprint, reliability, and standardized testing matter.
Availability
SMF13AH is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply and full traceability.
Supply support for SMF13AH 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 validation capabilities.
The SMF series was developed specifically for automotive and industrial transient suppression, emphasizing compact packaging, high reliability under thermal stress, and compliance with ISO 7637-2 and AEC-Q101 standards.
FAQ
What is the breakdown voltage range of the SMF13AH?
The SMF13AH has a guaranteed breakdown voltage (VBR) range of 14.4 V to 15.9 V at 1 mA test current, measured per JEDEC JESD201. This range ensures consistent clamping behavior across production lots and temperature extremes, and directly supports its 13 V working stand-off voltage rating. The SMF13AH's VBR specification is verified during 100% production testing and documented in Taiwan Semiconductor's official datasheet revision A2103.
Is the SMF13AH suitable for automotive applications?
Yes, the SMF13AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its SOD-123W package, MSL Level 1 rating, and −55 °C to +175 °C operating range make it suitable for under-hood and body-control module deployments. The SMF13AH's qualification data and test reports are published by Taiwan Semiconductor and accepted by Tier 1 automotive suppliers.
What is the maximum clamping voltage of the SMF13AH during a surge event?
The SMF13AH exhibits a maximum clamping voltage (VC) of 21.5 V at 9.3 A peak impulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured at TA = 25 °C and reflects worst-case device behavior under surge conditions. The SMF13AH's clamping performance is stable across its full temperature range and forms the basis for downstream IC overvoltage margin calculations.
Does the SMF13AH have polarity markings, and how is it oriented on the PCB?
Yes, the SMF13AH uses a cathode band marking on the SOD-123W package to indicate polarity. The banded end is the cathode and must be connected to the higher-potential side of the protected circuit (e.g., 12 V rail), while the anode connects to ground or lower potential. This orientation enables unidirectional clamping action. The SMF13AH's marking diagram and suggested pad layout are provided in Taiwan Semiconductor's datasheet Figure 6.
What is the thermal resistance of the SMF13AH, and how does it affect PCB layout?
The SMF13AH has a junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on a 5 mm × 5 mm copper pad per JEDEC test standard. This value assumes standard FR-4 PCB construction and guides minimum copper area requirements: reducing RθJA requires increasing pad size or adding thermal vias. The SMF13AH's thermal performance is validated in the datasheet's Thermal Performance section and directly impacts sustained surge duty-cycle capability.
SMF13AH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
SMF13AH FAQ
1.How can I place an order for SMF13AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF13AH 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 SMF13AH reliable?
The price and inventory of SMF13AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF13AH is usually 5 days.
3.What payment methods are accepted for SMF13AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF13AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF13AH?
SMF13AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF13AH 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 SMF13AH?
For technical support, including SMF13AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF13AH requirements.
6.How does Aetrix verify that SMF13AH is sourced from the original manufacturer or authorized distributors?
All SMF13AH 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 SMF13AH meets industry standards.
7.What is the process for return or replacement of SMF13AH?
All SMF13AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF13AH, 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 SMF13AH part is unused and in its original packaging.
Return procedure for SMF13AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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