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Taiwan Semiconductor Corporation SMF16AH
- Part No.:
- SMF16AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- SOD-123W
- Datasheet:
-
SMF16AH.pdf
- Description:
- TVS DIODE 16VWM 26VC SOD123W
- Quantity:
- Payment:
- Shipping:
Inventory:8,220
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Product details
Overview
SMF16AH from Taiwan Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for automotive-grade circuit protection. 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 to protect automotive lighting control modules and CAN bus interface ICs against ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b transients.
For engineers reviewing the SMF16AH datasheet, SMF16AH pinout, SMF16AH application, or SMF16AH equivalent, key selection criteria include its AEC-Q101 qualification, SOD-123W package compatibility with automated placement, low reverse leakage (<1 µA @ 16 V), and verified clamping performance under standardized automotive surge waveforms.
Technical Context
The SMF16AH operates as a unidirectional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its photo-glass passivated junction ensures stable VBR tolerance and long-term reliability under thermal cycling.
It meets ISO 7637-2 immunity requirements for automotive electronics by clamping fast-rising transients (e.g., load dump, inductive switch-off) within defined voltage limits while sustaining 200 W peak pulse power without degradation. Thermal resistance values (RθJL = 33 °C/W, RθJA = 100 °C/W) are specified for mounting on a 5 mm × 5 mm copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 16 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 17.8 V / 19.7 V - Breakdown occurs within this range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 26.0 V @ 7.7 A - Clamped voltage during 10/1000 µs surge; determines protected IC's maximum stress level |
| PPPM | 200 W - Peak pulse power handling capability; validates compliance with ISO 7637-2 Pulse 1/2a/2b/3a/3b |
| IR @ VWM | <1 µA - Minimal leakage at rated stand-off voltage; preserves low-power system quiescent current |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive deployment |
| Package | SOD-123W - Surface-mount outline with matte tin-plated leads; compatible with J-STD-002 soldering and JESD 201 Class 2 whisker testing |
Pinout & Package
SOD-123W package: single-die, unidirectional TVS diode with cathode band marking polarity. Dimensions per Taiwan Semiconductor package outline drawing; lead finish is matte tin, compliant with J-STD-002 solderability standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connected to protected circuit's ground or low-side return; completes clamp path during transient |
| Cathode | Reverse-biased clamping node | Connected to protected line (e.g., CAN_H, LIN, lighting supply); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity, and mechanical shock per AEC standard |
| Photo-glass passivated junction | Ensures stable electrical parameters over lifetime and prevents moisture-induced degradation |
| Clamping voltage ≤26.0 V @ 7.7 A | Keeps downstream ICs (e.g., CAN transceivers, microcontrollers) below absolute maximum ratings during ISO 7637-2 pulses |
| Moisture sensitivity level 1 | No floor life limitation or bake requirement prior to reflow; simplifies SMT manufacturing flow |
| RoHS and halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive; suitable for global automotive supply chains |
Applications
| Automotive Lighting Control | CAN Bus Interface Protection |
|---|---|
Use Scenario: Protecting LED driver ICs and MOSFET switches in headlamp and tail lamp modules from load dump and inductive switching transients. IC Role / Device Role / Timing Role: TVS diode placed across power rail (VBAT) and ground to clamp surges before they reach sensitive drivers. Use Value: Prevents latch-up or permanent damage to 3.3 V/5 V logic and gate drivers during 12 V system transients up to ±100 V. | Use Scenario: Safeguarding high-speed CAN FD transceivers (e.g., TJA1044, SN65HVD256) against ESD and coupled noise on differential bus lines. IC Role / Device Role / Timing Role: Unidirectional TVS connected between CAN_H/CAN_L and ground to suppress common-mode transients without distorting signal integrity. Use Value: Maintains <26.0 V clamping during 10/1000 µs pulses, preserving CAN bit timing and preventing false dominant states. |
| Body Control Module (BCM) Inputs | Industrial Sensor Signal Lines |
Use Scenario: Shielding microcontroller GPIOs and analog inputs in BCMs from EFT and ISO 7637-2 Pulse 3b events induced by relay switching. IC Role / Device Role / Timing Role: Discrete TVS placed at connector entry point to divert fast transients before reaching internal protection networks. Use Value: Limits input voltage excursion to ≤26.0 V, enabling use of lower-cost MCUs without integrated high-voltage ESD structures. | Use Scenario: Protecting 4–20 mA current loop receivers and RS-485 transceivers in factory automation systems from lightning-induced surges. IC Role / Device Role / Timing Role: TVS installed on signal line-to-ground to absorb energy from 1 kV/500 A surge events per IEC 61000-4-5. Use Value: Delivers 200 W peak pulse power handling in compact SOD-123W footprint-no heatsink required for typical industrial surge profiles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ16A | Same VWM (16 V), slightly higher VC (25.5 V @ 7.5 A), identical SOD-123 package but non-AEC-Q101 rated | Not qualified for automotive under-hood use; suitable for industrial/commercial designs with lower reliability requirements | Select SMAJ16A only if AEC-Q101 compliance is not mandated and cost is prioritized over automotive qualification |
| Vishay SMA6J16A | Same VWM (16 V), VC = 25.0 V @ 7.9 A, AEC-Q101 qualified, but RθJA = 110 °C/W (vs. SMF16AH's 100 °C/W) | Marginally higher thermal resistance may limit sustained surge duty cycle in high-ambient environments | Prefer SMF16AH for thermally constrained PCB layouts where junction temperature rise must be minimized |
Compared with SMAJ16A and SMA6J16A, the SMF16AH offers tighter VBR tolerance (±5.4%), lower clamping voltage margin (26.0 V vs. 25.0–25.5 V), and superior thermal performance (RθJA = 100 °C/W), making it optimal for space-constrained automotive modules requiring repeatable surge immunity.
Availability
SMF16AH is available at Aetrix Electronics and suitable for automotive lighting control, CAN bus interface protection, and body control module input conditioning requiring stable component supply across production lifecycles.
Supply support for SMF16AH 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 Company (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, and rectifiers, with global distribution and AEC-Q101 validation capabilities.
The SMF series was developed specifically for automotive electronics protection, targeting ISO 7637-2 compliance and high-reliability operation in under-hood and chassis-mounted ECUs.
FAQ
What is the maximum clamping voltage of the SMF16AH during a 10/1000 µs transient?
The SMF16AH has a maximum clamping voltage (VC) of 26.0 V when subjected to a 10/1000 µs waveform at 7.7 A peak pulse current. This value is measured per JEDEC standards and confirmed in Taiwan Semiconductor's official datasheet revision A2103. The clamping voltage directly determines the maximum stress imposed on downstream ICs during surge events, making it critical for validating protection margins in automotive designs using the SMF16AH.
Is the SMF16AH qualified for automotive applications?
Yes, the SMF16AH is AEC-Q101 qualified, meaning it has passed stress tests for temperature cycling, humidity, mechanical shock, and high-temperature operating life required for automotive electronic components. This qualification is explicitly stated in the product documentation and applies to the SMF16AH part number-not just the family. Engineers specifying the SMF16AH for vehicle ECUs can rely on its validated robustness in under-hood and chassis environments.
What package does the SMF16AH use, and is it compatible with standard SMT processes?
The SMF16AH uses the SOD-123W surface-mount package with matte tin-plated leads, fully compliant with J-STD-002 solderability requirements. Its moisture sensitivity level is rated at Level 1 (per J-STD-020), eliminating the need for dry-pack or baking prior to reflow. The SMF16AH is optimized for high-speed automated placement and supports standard lead-free reflow profiles, making it production-ready for automotive Tier 1 manufacturing lines.
How does the SMF16AH compare to the SMF15AH and SMF17AH in terms of voltage rating?
The SMF16AH has a 16 V working stand-off voltage (VWM), positioned between the SMF15AH (15 V VWM) and SMF17AH (17 V VWM). Its breakdown voltage range is 17.8–19.7 V, narrower than SMF15AH (16.7–18.5 V) and SMF17AH (18.9–20.9 V), offering tighter tolerance for precise voltage-margin design. All three share identical power rating (200 W), package (SOD-123W), and AEC-Q101 qualification-selection depends on system-level VWM margin requirements relative to nominal supply rails.
Does the SMF16AH meet ISO 7637-2 immunity requirements?
Yes, the SMF16AH is explicitly rated to meet ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test conditions. Its 200 W peak pulse power rating (at VWM ≥ 60 V, PPPM = 175 W) and verified clamping behavior under standardized waveforms ensure compliance. Taiwan Semiconductor confirms this in the "Features" section of the SMF5.0AH–SMF100AH datasheet (Rev. A2103), validating the SMF16AH for use in automotive subsystems requiring certified EMC robustness.
SMF16AH 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- SOD-123W
SMF16AH FAQ
1.How can I place an order for SMF16AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF16AH 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 SMF16AH reliable?
The price and inventory of SMF16AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF16AH is usually 5 days.
3.What payment methods are accepted for SMF16AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF16AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF16AH?
SMF16AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF16AH 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 SMF16AH?
For technical support, including SMF16AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF16AH requirements.
6.How does Aetrix verify that SMF16AH is sourced from the original manufacturer or authorized distributors?
All SMF16AH 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 SMF16AH meets industry standards.
7.What is the process for return or replacement of SMF16AH?
All SMF16AH units undergo pre-shipment inspection (PSI). If there is an issue with SMF16AH, 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 SMF16AH part is unused and in its original packaging.
Return procedure for SMF16AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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