My Inquiry
My Account
Taiwan Semiconductor Corporation SMF14AH
- Part No.:
- SMF14AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF14AH.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:3,038
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF14AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SOD-123W package, rated for 14 V working stand-off voltage, 23.2 V clamping voltage at 8.6 A peak pulse current, and 200 W peak pulse power (10/1000 µs). It provides ISO 7637-2-compliant protection for automotive electronics and industrial control circuits exposed to ESD and inductive switching transients.
For engineers reviewing the SMF14AH datasheet, SMF14AH pinout, SMF14AH application, or SMF14AH equivalent, key selection criteria include its 15.6–17.2 V breakdown range, <1 µA reverse leakage at 14 V, AEC-Q101 qualification, moisture sensitivity level 1 rating, and SOD-123W thermal performance (RθJL = 33 °C/W).
Technical Context
The SMF14AH operates as a unidirectional clamping device with photo-glass passivated junction, enabling low-leakage (<1 µA @ VWM) and stable breakdown behavior across temperature. Its 10/1000 µs waveform response supports robust immunity against load-dump and EFT pulses per ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b.
Designed for PCB mounting on 5 mm × 5 mm copper pads, it delivers 200 W peak pulse power with derating above 25 °C ambient and maintains operation from –55 °C to +175 °C junction temperature. The SOD-123W package features matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 14 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR min/max | 15.6 V / 17.2 V - Verified breakdown threshold range at 1 mA test current |
| VC @ IPPM | 23.2 V - Clamped voltage during 8.6 A 10/1000 µs transient, limiting downstream stress |
| PPPM | 200 W - Peak pulse power handling capability under standardized surge waveform |
| IR @ VWM | <1 µA - Ultra-low leakage ensures minimal standby power loss in high-impedance circuits |
| TJ max | +175 °C - Enables reliable operation in under-hood automotive and industrial environments |
| RθJL | 33 °C/W - Low junction-to-lead thermal resistance supports efficient heat transfer to PCB |
Pinout & Package
SOD-123W surface-mount package with cathode band marking; 2-terminal unidirectional configuration; 0.016 g mass; UL 94V-0 molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to system ground or low-side return in clamping configuration |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., CAN_H, LIN, sensor supply); cathode band identifies polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Photo-glass passivated junction | Ensures stable VBR tolerance and long-term leakage stability under humidity and bias stress |
| ISO 7637-2 compliance | Withstands defined load-dump (Pulse 5a/b), inductive switch-off (Pulse 1/3b), and EFT (Pulse 2a/3a) waveforms |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT assembly processes |
| Halogen-free construction | Meets IEC 61249-2-21 requirements for environmentally compliant manufacturing |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load-dump transients and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping device placed between power rail and ground. Use Value: Limits voltage to ≤23.2 V during 8.6 A surges, preventing damage to downstream LDOs and microcontrollers in SMF14AH-protected modules. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to MCU ADC inputs. IC Role / Device Role / Timing Role: Reverse-biased transient clamp on signal line referenced to local ground. Use Value: Clamps fast ESD events (<1 ns rise time) while maintaining <1 µA leakage to preserve signal integrity and offset accuracy in SMF14AH-protected sensor paths. |
| Automotive LIN Bus Protection | DC Motor Driver Flyback Suppression |
Use Scenario: Shielding LIN transceivers from coupled noise and cable discharge events in body-control networks. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMF14AH used as unidirectional clamp from LIN bus to ground. Use Value: Maintains LIN signal fidelity by clamping negative-going transients below –23.2 V while adding negligible capacitance (<100 pF) to the bus in SMF14AH implementations. | Use Scenario: Suppressing inductive kickback from brushed DC motors controlled by N-channel MOSFETs. IC Role / Device Role / Timing Role: Freewheeling path for flyback current during MOSFET turn-off. Use Value: Absorbs 200 W peak energy without failure, enabling compact motor driver designs where SMF14AH replaces bulkier TVS arrays or Zener stacks. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A | Same VWM (14 V), but lower PPPM (400 W → 400 W vs. SMF14AH's 200 W); SMA package (larger footprint, higher RθJA) | Higher thermal mass suits less space-constrained industrial boards; not AEC-Q101 qualified | Prefer SMAJ14A only when board layout allows SMA footprint and automotive qualification is unnecessary |
| 1.5SMC14A | Same VWM, but DO-214AB package; 1500 W PPPM; higher VC (25.5 V); no AEC-Q101 or ISO 7637-2 documentation | Better surge handling for non-automotive surge-only use cases; lacks automotive validation data | Select 1.5SMC14A only for cost-sensitive, non-automotive applications requiring higher peak power margin |
Compared with SMAJ14A and 1.5SMC14A, the SMF14AH offers AEC-Q101 qualification, ISO 7637-2 compliance, and SOD-123W space efficiency-making it uniquely suitable for automotive PCBs where reliability, footprint, and standards alignment are jointly critical.
Availability
SMF14AH is available at Aetrix Electronics and suitable for automotive ECU design, industrial sensor interface protection, and DC motor driver flyback suppression requiring stable component supply and full traceability.
Supply support for SMF14AH 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, and rectifiers, with global distribution and AEC-Q101-compliant product lines.
The SMF14AH belongs to TSC's SMF-AH series of automotive-grade TVS diodes, engineered specifically for ISO 7637-2-compliant transient suppression in space-constrained 12 V vehicle subsystems.
FAQ
What is the maximum clamping voltage of the SMF14AH under standard test conditions?
The SMF14AH has a maximum clamping voltage (VC) of 23.2 V when subjected to an 8.6 A peak pulse current with a 10/1000 µs waveform. This value is measured at TA = 25 °C and defines the upper voltage limit imposed on protected circuitry during transient events. The SMF14AH maintains this clamping performance across its specified junction temperature range.
Is the SMF14AH qualified for automotive applications?
Yes, the SMF14AH is AEC-Q101 qualified and explicitly validated for automotive use. It meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements, confirming suitability for protecting ECUs, body controllers, and sensor interfaces in 12 V vehicle electrical systems. The SMF14AH's qualification documentation is published in Taiwan Semiconductor's official datasheet revision A2103.
What package does the SMF14AH use, and what are its key mechanical attributes?
The SMF14AH uses the SOD-123W surface-mount package, featuring a 0.016 g mass, UL 94V-0 flammability-rated molding compound, and matte tin-plated leads compliant with J-STD-002 solderability and JESD 201 Class 2 whisker resistance. Polarity is indicated by a cathode band. The SMF14AH's SOD-123W footprint enables high-density PCB layouts while delivering RθJL = 33 °C/W thermal performance.
Does the SMF14AH have halogen-free and RoHS-compliant construction?
Yes, the SMF14AH is both RoHS compliant and halogen-free per IEC 61249-2-21. These environmental qualifications are confirmed in the official Taiwan Semiconductor datasheet (Version A2103) and apply to all units shipped under the SMF14AH ordering code. The SMF14AH meets global regulatory requirements for restricted substances without compromising electrical or thermal performance.
How does the SMF14AH compare to the SMF15AH in terms of voltage ratings and application suitability?
The SMF14AH has a 14 V working stand-off voltage (VWM) and 15.6–17.2 V breakdown range, whereas the SMF15AH specifies 15 V VWM and 16.7–18.5 V VBR. This 1 V difference makes the SMF14AH preferable for tighter-margin 12 V systems where clamping must activate just above nominal rail voltage. The SMF14AH remains optimal where precise overvoltage threshold alignment is required in automotive and industrial designs.
SMF14AH 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):
- 14V
- Voltage - Breakdown (Min):
- 15.6V
- Voltage - Clamping (Max) @ Ipp:
- 23.2V
- Current - Peak Pulse (10/1000µs):
- 8.6A
- 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
SMF14AH FAQ
1.How can I place an order for SMF14AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF14AH 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 SMF14AH reliable?
The price and inventory of SMF14AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF14AH is usually 5 days.
3.What payment methods are accepted for SMF14AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF14AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF14AH?
SMF14AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF14AH 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 SMF14AH?
For technical support, including SMF14AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF14AH requirements.
6.How does Aetrix verify that SMF14AH is sourced from the original manufacturer or authorized distributors?
All SMF14AH 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 SMF14AH meets industry standards.
7.What is the process for return or replacement of SMF14AH?
All SMF14AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF14AH, 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 SMF14AH part is unused and in its original packaging.
Return procedure for SMF14AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF14AH 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 …
