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Taiwan Semiconductor Corporation SMF10AH
- Part No.:
- SMF10AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF10AH.pdf
- Description:
- TVS DIODE 10VWM 17VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:9,892
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Product details
Overview
SMF10AH from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SOD-123W package, with 10 V working stand-off voltage (VWM), 11.1–12.3 V breakdown voltage (VBR), 17.0 V clamping voltage (VC) at 5 A peak pulse current, and 200 W peak pulse power (10/1000 µs). It protects automotive and industrial electronics against ESD, EFT, and inductive switching transients.
For engineers reviewing the SMF10AH datasheet, SMF10AH pinout, SMF10AH application, or SMF10AH equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, AEC-Q101 qualification, low IR (<1 µA @ 10 V), and SOD-123W thermal performance (RθJA = 100 °C/W).
Technical Context
The SMF10AH is a unidirectional TVS diode designed for fast-response overvoltage protection in DC power rails and signal lines. Its glass-passivated junction ensures stable breakdown behavior and low leakage, while its 10/1000 µs waveform rating supports robust immunity to automotive load-dump and inductive kickback events.
It operates across –55 °C to +175 °C junction temperature range and meets JESD201 Class 2 whisker resistance and J-STD-020 Moisture Sensitivity Level 1. The device is RoHS-compliant and halogen-free per IEC 61249-2-21.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 10 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 11.1 / 12.3 V @ IT = 1 mA - Ensures reliable turn-on above system nominal voltage with margin |
| VC @ IPPM | 17.0 V @ 5 A - Clamps transient energy to safe level for downstream 12 V logic or MCU I/O |
| PPPM | 200 W (10/1000 µs) - Handles high-energy pulses per ISO 7637-2 without degradation |
| IR @ VWM | <1 µA - Negligible standby leakage in battery-powered or low-power systems |
| TJ max | +175 °C - Supports under-hood automotive placement and industrial high-temp environments |
| RθJA | 100 °C/W - Enables thermal design on standard 5 mm × 5 mm Cu pad PCB layout |
Pinout & Package
Package: SOD-123W - Surface-mount, single-diode, cathode-band marked case with matte tin-plated leads (J-STD-002 solderable), UL 94V-0 molding compound, 0.016 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or return path; defines unidirectional conduction direction |
| Cathode | Protected line input | Connected to supply rail or signal line; clamps positive transients to VWM + VC margin |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing |
| Photo glass passivated junction | Stable VBR tolerance and low IR drift over lifetime and temperature |
| Clamping voltage ≤17.0 V @ 5 A | Protects 12 V systems (e.g., CAN transceivers, LIN nodes) without overstressing IC inputs |
| Meets ISO 7637-2 Pulse 1/2a/2b/3a/3b | Complies with full suite of automotive transient immunity requirements without external filtering |
| SOD-123W package | Enables automated pick-and-place assembly and achieves 100 °C/W thermal resistance on minimal PCB area |
Applications
| Automotive Body Control Module (BCM) | Industrial PLC Digital Input Protection |
|---|---|
Use Scenario: Protecting 12 V power rail and sensor inputs in BCM against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS clamping transient surges before they reach microcontroller power domains and analog front-ends. Use Value: Prevents latch-up or permanent damage during ISO 7637-2 Pulse 5a (load dump), maintaining system uptime and ASIL-B compliance. | Use Scenario: Safeguarding 24 V digital input channels in programmable logic controllers exposed to relay coil flyback and field wiring transients. IC Role / Device Role / Timing Role: Fast-acting voltage clamp placed directly at terminal block entry point to limit surge propagation into isolation barrier and FPGA I/O banks. Use Value: Enables >20 kV ESD immunity and sustained operation under repetitive 1 kV EFT bursts per IEC 61000-4-4. |
| LED Headlamp Driver Protection | Automotive CAN FD Transceiver Interface |
Use Scenario: Shielding constant-current LED driver ICs from inductive switching spikes generated by buck converter MOSFETs. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing energy from L×di/dt events on high-side switch node and output rail. Use Value: Limits voltage overshoot to <17 V, preventing gate oxide stress on driver FETs and ensuring LED string continuity. | Use Scenario: Protecting CAN FD physical layer transceivers (e.g., TJA1044) from bus faults and coupling noise in vehicle networks. IC Role / Device Role / Timing Role: Bidirectional-capable interface protection (used unidirectionally here) placed between connector and transceiver pins. Use Value: Maintains signal integrity during ±25 kV contact ESD events while adding <0.5 pF parasitic capacitance (per Fig.4). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ10A | Same VWM (10 V), higher VC (20.1 V @ 5.3 A), SMA package (larger footprint, RθJA = 60 °C/W) | Less effective clamping margin for 12 V systems; requires larger PCB area | Choose if higher steady-state power (1.5 W) or legacy footprint compatibility is required |
| P6SMB10A | Same VWM (10 V), lower PPPM (600 W), DO-214AA package, higher IR (≤5 µA) | Over-specified peak power for most 12 V applications; less suitable for space-constrained layouts | Prefer when cost sensitivity outweighs size constraints and thermal limits allow larger package |
Compared with SMAJ10A and P6SMB10A, the SMF10AH delivers tighter clamping (17.0 V vs. ≥20.1 V), superior thermal efficiency in compact SOD-123W, and AEC-Q101 validation-making it optimal for modern automotive ECUs and high-density industrial modules where voltage margin and board space are critical.
Availability
SMF10AH is available at Aetrix Electronics and suitable for automotive body electronics, industrial PLC input stages, LED driver protection, and CAN FD interface circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMF10AH 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 automotive qualification capabilities.
The SMF10AH belongs to TSC's SMF-AH series of AEC-Q101-qualified TVS diodes engineered specifically for harsh-environment transient suppression in automotive power distribution and industrial control systems.
FAQ
What is the maximum clamping voltage of the SMF10AH under standard test conditions?
The SMF10AH has a maximum clamping voltage (VC) of 17.0 V when subjected to a 10/1000 µs peak pulse current of 5 A. This value is measured per JEDEC standards and ensures reliable protection of 12 V-rated components such as microcontrollers, CAN transceivers, and sensor interfaces without exceeding safe voltage thresholds.
Is the SMF10AH qualified for automotive applications?
Yes, the SMF10AH is AEC-Q101 qualified and explicitly tested to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transient immunity requirements. Its construction-including glass-passivated junction, SOD-123W package, and –55 °C to +175 °C operating range-supports deployment in engine control units, body modules, and ADAS subsystems.
What is the reverse leakage current specification for the SMF10AH at its working voltage?
The SMF10AH exhibits a maximum reverse leakage current (IR) of less than 1 µA at its 10 V working stand-off voltage (VWM), measured at 25 °C. This ultra-low leakage preserves battery life in always-on automotive modules and avoids false triggering in high-impedance sensing circuits.
Does the SMF10AH have polarity marking, and how is it identified?
Yes, the SMF10AH uses a cathode band to indicate polarity, consistent with standard diode marking conventions. On the SOD-123W package, the band is located adjacent to the cathode terminal, enabling correct orientation during automated placement and manual inspection per J-STD-020 and JEDEC outline drawings.
What thermal resistance values apply to the SMF10AH in standard PCB mounting?
When mounted on a standard 5 mm × 5 mm copper pad test board, the SMF10AH exhibits a junction-to-ambient thermal resistance (RθJA) of 100 °C/W and a junction-to-lead resistance (RθJL) of 33 °C/W. These values support thermal modeling for high-reliability designs operating up to +175 °C junction temperature.
SMF10AH 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):
- 10V
- Voltage - Breakdown (Min):
- 11.1V
- Voltage - Clamping (Max) @ Ipp:
- 17V
- Current - Peak Pulse (10/1000µs):
- 11.8A
- 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
SMF10AH FAQ
1.How can I place an order for SMF10AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF10AH 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 SMF10AH reliable?
The price and inventory of SMF10AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF10AH is usually 5 days.
3.What payment methods are accepted for SMF10AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF10AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF10AH?
SMF10AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF10AH 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 SMF10AH?
For technical support, including SMF10AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF10AH requirements.
6.How does Aetrix verify that SMF10AH is sourced from the original manufacturer or authorized distributors?
All SMF10AH 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 SMF10AH meets industry standards.
7.What is the process for return or replacement of SMF10AH?
All SMF10AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF10AH, 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 SMF10AH part is unused and in its original packaging.
Return procedure for SMF10AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF10AH Tags
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