My Inquiry
My Account
Taiwan Semiconductor Corporation SMF16A
- Part No.:
- SMF16A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF16A.pdf
- Description:
- TVS DIODE 16VWM 26VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:8,565
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMF16A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy ESD and surge protection in DC power rails and signal lines. It features a 16 V working stand-off voltage (VWM), 17.8–19.7 V breakdown voltage (VBR), 26.0 V clamping voltage (VC) at 7.7 A peak pulse current, and 200 W peak pulse power (10/1000 µs waveform). It is used in automotive infotainment power inputs and industrial sensor interface protection.
For engineers reviewing the SMF16A datasheet, SMF16A pinout, SMF16A application, or SMF16A equivalent, key selection criteria include clamping performance under ISO 7637-2 Pulse 1/2a/2b/3a/3b, low leakage (<1 µA @ 16 V), SOD-123W package compatibility with automated placement, and thermal resistance (RθJL = 33 °C/W) for PCB-level thermal management.
Technical Context
The SMF16A operates as a unidirectional avalanche diode, triggering when reverse voltage exceeds its specified VBR range (17.8–19.7 V at 1 mA test current). Its clamping action limits transients to ≤26.0 V at 7.7 A (10/1000 µs), enabling robust protection of downstream 16 V-rated ICs without overvoltage stress.
It meets ISO 7637-2 immunity requirements for automotive electronics and supports operation across –55 °C to +175 °C junction temperature. The glass-passivated junction ensures stable leakage (<1 µA @ VWM) and long-term reliability under repeated transient events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 16 V systems. |
| VBR min/max | 17.8 / 19.7 V @ 1 mA - Confirmed avalanche onset range; ensures predictable turn-on above nominal rail. |
| VC @ IPPM | 26.0 V @ 7.7 A (10/1000 µs) - Peak clamped voltage seen by protected circuit during worst-case surge. |
| PPPM | 200 W - Surge energy handling capacity per IEC 61000-4-5 and ISO 7637-2 compliant waveforms. |
| IR @ VWM | <1 µA - Negligible leakage at rated stand-off voltage; avoids power loss or false triggering in low-current circuits. |
| Package | SOD-123W - Surface-mount, moisture-sensitive level 1 (J-STD-020), RoHS- and halogen-free compliant package. |
Pinout & Package
SMF16A is housed in a SOD-123W package with two terminals: anode and cathode. Polarity is marked by a cathode band on the device body. The package uses matte tin-plated leads, solderable per J-STD-002, and weighs approximately 0.016 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to ground or lower-potential node in unidirectional TVS configuration | Provides low-forward-voltage path (VF = 3.5 V @ 12 A) during fault conditions; must be routed to lowest-impedance return path. |
| Cathode | Current exit point in forward bias; connected to protected line or higher-potential node | Defines clamping reference; reverse-biased connection enables avalanche breakdown when line voltage exceeds VBR relative to ground. |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling), enabling direct use in automotive ECUs without additional filtering. |
| Low clamping ratio (VC/VBR) | 26.0 V / 17.8 V ≈ 1.46 - Tight voltage margin between breakdown and clamping ensures minimal overvoltage exposure to protected ICs. |
| Thermal performance | RθJL = 33 °C/W - Enables efficient heat transfer to PCB copper pad, supporting sustained operation at TJ up to 175 °C in compact layouts. |
| Automated placement readiness | SOD-123W footprint and matte tin plating meet J-STD-002 solderability standards, ensuring high-yield reflow assembly without tombstoning or wetting issues. |
Applications
| Automotive Power Input Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V power input of infotainment head units against load dump and jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and chassis ground to clamp transients before they reach PMIC and microcontroller power domains. Use Value: Limits peak voltage to 26.0 V during 200 W pulses, preventing latch-up or permanent damage to 16 V-rated regulators and LDOs. | Use Scenario: Safeguarding 4–20 mA analog sensor outputs in factory automation PLC modules from EFT and cable discharge events. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt fast transients (<100 ns rise time) away from precision op-amps and ADC front-ends. Use Value: Sub-1 µA leakage preserves signal integrity in µA-level current loops; 26.0 V clamping prevents op-amp saturation and ADC overrange errors. |
| DC Motor Drive Board Protection | Smart Lighting Control Input Protection |
Use Scenario: Shielding H-bridge gate drivers and logic inputs from inductive kickback generated by brushed DC motors. IC Role / Device Role / Timing Role: TVS placed across motor supply rails and across driver enable/control pins to absorb repetitive switching spikes. Use Value: Withstands ≥1000 pulses at 7.7 A (10/1000 µs) without degradation; 175 °C max junction temperature supports operation near hot MOSFETs. | Use Scenario: Protecting DALI or 0–10 V dimming control inputs in LED drivers from ESD and lightning-induced surges on building wiring. IC Role / Device Role / Timing Role: Unidirectional TVS referenced to local controller ground, absorbing negative-going transients on control lines while preserving signal fidelity. Use Value: 16 V VWM matches common 12–15 V control rail levels; 26.0 V VC ensures MCU GPIOs remain within absolute maximum ratings during 1 kV EFT bursts. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ16A | Same VWM (16 V), identical SOD-123 package, but higher VC (25.1 V @ 7.8 A); RθJA = 110 °C/W vs. SMF16A's 100 °C/W | Slightly tighter clamping; lower thermal resistance allows marginally higher ambient operation in dense layouts | Preferred where board space is constrained and thermal relief is limited; verify layout copper area matches SMAJ16A derating curve. |
| Vishay SMBJ16A | Same VWM and SOD-123W package, but higher PPPM (600 W), higher VC (28.8 V @ 21.2 A), and higher IR (5 µA @ VWM) | Higher surge rating suits harsher environments (e.g., heavy equipment), but looser clamping may require downstream voltage margin adjustment | Choose when system must survive multiple 600 W surges; accept trade-off of higher clamping voltage and leakage in low-power sensor nodes. |
Compared with SMAJ16A and SMBJ16A, the SMF16A delivers optimal balance of clamping voltage (26.0 V), leakage (<1 µA), and thermal resistance (33 °C/W to lead) for cost-sensitive automotive and industrial designs where precise 16 V rail protection is required without over-engineering.
Availability
SMF16A is available at Aetrix Electronics and suitable for automotive infotainment power inputs, industrial sensor interfaces, and DC motor drive board protection requiring stable component supply and full traceability.
Supply support for SMF16A 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 industrial and automotive markets.
The SMF series was developed specifically for high-reliability, surface-mount transient suppression in ISO 7637-2-compliant automotive subsystems and ruggedized industrial controls, emphasizing low leakage, tight VBR tolerance, and robust thermal performance in compact packages.
FAQ
What is the maximum clamping voltage of the SMF16A under standard test conditions?
The SMF16A has a maximum clamping voltage (VC) of 26.0 V when subjected to a 10/1000 µs waveform with a peak pulse current (IPPM) of 7.7 A. This value is measured at TA = 25°C and reflects the actual voltage imposed on the protected circuit during surge events. The SMF16A maintains this clamping performance across its full operating temperature range, making it suitable for under-hood automotive applications where thermal stability is critical.
Does the SMF16A meet automotive transient immunity standards?
Yes, the SMF16A meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling). Its 200 W peak pulse power rating, low clamping voltage, and verified performance under standardized surge waveforms make it appropriate for protecting ECUs, body control modules, and infotainment systems. The SMF16A is not qualified to AEC-Q200, but its construction and test validation align with automotive-grade transient suppression needs.
What is the polarity configuration and marking convention for the SMF16A?
The SMF16A is a unidirectional TVS diode with cathode indicated by a band on the SOD-123W package body. When installed, the cathode connects to the protected line (e.g., 16 V rail), and the anode connects to ground. Its marking code is "2W016", laser-etched on the device surface. This polarity ensures proper avalanche conduction only during reverse overvoltage events, preserving forward-bias integrity in normal operation.
How does the SMF16A compare to the SMF15A and SMF17A in terms of voltage rating?
The SMF16A has a 16 V working stand-off voltage (VWM), positioned between SMF15A (15 V) and SMF17A (17 V). Its VBR range (17.8–19.7 V) provides a 1.8–3.7 V margin above VWM-identical to adjacent variants-ensuring consistent design safety margins. Engineers select SMF16A specifically for 16 V nominal systems (e.g., dual-battery automotive accessories), avoiding undershoot risk with SMF15A or unnecessary headroom with SMF17A.
What is the thermal resistance profile of the SMF16A, and how does it impact PCB layout?
The SMF16A has a junction-to-lead thermal resistance (RθJL) of 33 °C/W and junction-to-ambient resistance (RθJA) of 100 °C/W when mounted on a 5 mm × 5 mm Cu pad. This means effective heat dissipation requires adequate copper area connected to the cathode/anode pads. For continuous operation near TJ = 175 °C, designers should allocate ≥25 mm² of 1 oz copper per terminal and avoid narrow traces that increase thermal impedance. The SMF16A's low RθJL makes it more thermally efficient than many competing SOD-123 devices.
SMF16A 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):
- 16V
- Voltage - Breakdown (Min):
- 17.8V
- Voltage - Clamping (Max) @ Ipp:
- 26V
- Current - Peak Pulse (10/1000µs):
- 7.7A
- 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
SMF16A FAQ
1.How can I place an order for SMF16A through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF16A 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 SMF16A reliable?
The price and inventory of SMF16A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF16A is usually 5 days.
3.What payment methods are accepted for SMF16A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF16A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF16A?
SMF16A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF16A 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 SMF16A?
For technical support, including SMF16A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF16A requirements.
6.How does Aetrix verify that SMF16A is sourced from the original manufacturer or authorized distributors?
All SMF16A 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 SMF16A meets industry standards.
7.What is the process for return or replacement of SMF16A?
All SMF16A units undergo pre-shipment inspection (PSI). If there is an issue with SMF16A, 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 SMF16A part is unused and in its original packaging.
Return procedure for SMF16A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF16A 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 …
