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Vishay General Semiconductor - Diodes Division SMF12A-HE3-08
- Part No.:
- SMF12A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF12A-HE3-08.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:28,044
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Product details
Overview
SMF12A-HE3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient voltage suppression in high-speed data lines. It features a 12 V stand-off voltage (VRWM), 19.9 V maximum clamping voltage at 10.1 A peak pulse current, 483 pF typical capacitance at 0 V, ±30 kV IEC 61000-4-2 ESD immunity, and AEC-Q101 qualification for automotive applications.
For engineers reviewing the SMF12A-HE3-08 datasheet, SMF12A-HE3-08 pinout, SMF12A-HE3-08 application, or SMF12A-HE3-08 equivalent, key selection criteria include clamping performance under 10/1000 μs surge, low capacitance for USB/USB-C/HDMI signal integrity, AEC-Q101 compliance for automotive infotainment interfaces, and SOD-123W-compatible footprint for board space-constrained designs.
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown behavior, optimized for fast response to electrostatic discharge events. Its "Low Noise" technology ensures sub-nanosecond response time, and its low incremental surge resistance enables tight clamping during transient events without significant voltage overshoot.
The SMF12A-HE3-08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports continuous operation from –65 °C to +175 °C. It meets IEC 61000-4-2 (±30 kV contact/air), IEC 61000-4-5 (surge), and AEC-Q101 H3B-class human body model (>8 kV) requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 12 V - Maximum continuous reverse operating voltage before conduction begins; defines safe operating margin for 12 V nominal bus lines. |
| Clamping Voltage (VC) | 19.9 V at IPPM = 10.1 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge; critical for IC input voltage tolerance. |
| Capacitance (CD) | 483 pF at VR = 0 V, f = 1 MHz - Low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity; higher than SMF5V0A but appropriate for lower-speed 12 V control lines. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - Full system-level ESD robustness without external shielding or layout mitigation. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling high-density routing and automated reflow assembly. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, humidity bias, and mechanical shock; suitable for infotainment, body control, and ADAS sensor interfaces. |
Pinout & Package
SMF12A-HE3-08 uses the DO-219AB (SMF) package: cathode-marked, two-terminal, surface-mount device with anode and cathode leads formed into gull-wing configuration. The package is compatible with SOD-123W footprint and supports wave/reflow soldering per J-STD-020 MSL level 1 (peak 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input/Protected Line Connection | Connected to the signal or power line requiring ESD protection; referenced to system ground via cathode path during clamping. |
| Cathode (Pin 2) | Ground Reference Terminal | Connected to low-impedance system ground; provides return path for surge current; polarity marking (bar) identifies this terminal on PCB silkscreen. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive ESD and lightning-induced surges in industrial and automotive environments without thermal runaway. |
| 483 pF capacitance at 0 V | Preserves signal edge rate and eye diagram integrity on 12 V analog sensor buses and LIN/CAN transceiver lines up to 1 Mbps. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary ESD filters or layout guard rings in handheld, dashboard, and connector-facing circuits. |
| AEC-Q101 qualified | Validated for automotive under-hood and cabin applications with extended temperature cycling and humidity bias stress testing. |
| Low-profile DO-219AB package | Reduces PCB real estate by ~30% vs. SMA packages while maintaining thermal performance (RthJA = 180 K/W on 3 mm × 3 mm Cu pad). |
Applications
| Automotive Infotainment Interface | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Protecting USB-C and HDMI hot-plug ports in head units and display modules from user-handling ESD. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline between connector and USB PHY or HDMI receiver IC. Use Value: Clamps transients to ≤19.9 V within nanoseconds, preventing latch-up or gate oxide damage in 1.8 V/3.3 V interface ICs while adding only 483 pF loading. | Use Scenario: Safeguarding analog outputs of pressure/temperature sensors in PLC I/O modules exposed to field wiring ESD. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 12 V sensor supply rail and 0–10 V analog output lines. Use Value: Maintains 12 V system compatibility with 12 V VRWM and delivers <100 ns response to preserve signal fidelity across 100 kHz bandwidth sensor signals. |
| Automotive Body Control Module (BCM) | Medical Diagnostic Equipment Port |
Use Scenario: ESD protection for LIN bus transceivers and LED driver control lines in door module and lighting controllers. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on LIN data line (dominant recessive swing) and 12 V switched load control paths. Use Value: AEC-Q101 qualification ensures long-term reliability under automotive thermal cycling; 19.9 V clamping prevents overvoltage on 12 V tolerant LIN transceivers. | Use Scenario: Protecting RS-232 and USB 2.0 diagnostic ports on ultrasound and patient monitor front panels from clinical handling ESD. IC Role / Device Role / Timing Role: Primary ESD clamp on serial communication lines connecting to host PC or peripheral devices. Use Value: ±30 kV contact discharge rating meets IEC 60601-1-2 4th edition requirements for medical EMC; DO-219AB footprint simplifies FDA-cleared design reuse. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ12A-E3/57T | Higher clamping voltage (23.2 V), larger SMA package (4.5 mm × 2.7 mm), 500 pF capacitance | Less suitable for space-constrained layouts; better for higher-energy 8/20 μs surges due to 400 W rating | Select when board area allows larger footprint and higher surge energy handling is prioritized over capacitance and size. |
| TPD2E001DRYR | Bi-directional dual-channel array, 12 pF capacitance, 5 V VRWM, not AEC-Q101 qualified | Designed for high-speed digital lines (USB 2.0, HDMI); lacks automotive qualification and 12 V standoff capability | Select only for non-automotive, low-voltage, high-speed data lines where ultra-low capacitance is mandatory and AEC-Q101 is not required. |
Compared with SMAJ12A-E3/57T and TPD2E001DRYR, SMF12A-HE3-08 uniquely balances AEC-Q101 qualification, 12 V system compatibility, compact DO-219AB packaging, and 483 pF capacitance-making it optimal for automotive 12 V sensor and infotainment interfaces where space, reliability, and moderate bandwidth coexist.
Availability
SMF12A-HE3-08 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, body control modules, and medical diagnostic equipment requiring stable component supply and AEC-Q101-compliant ESD protection.
Supply support for SMF12A-HE3-08 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
Vishay Intertechnology is a global semiconductor manufacturer specializing in discrete components, passive elements, and sensors, with leadership in power management, signal conditioning, and protection technologies.
The SMF series is part of Vishay's eSMP® family, engineered specifically for high-reliability, low-profile ESD and surge protection in automotive, industrial, and medical applications where AEC-Q101 compliance and minimal board space are essential.
FAQ
What is the clamping voltage of SMF12A-HE3-08 at its rated peak pulse current?
The SMF12A-HE3-08 has a maximum clamping voltage (VC) of 19.9 V at its rated peak pulse current (IPPM) of 10.1 A under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and represents the upper voltage limit imposed on the protected circuit during surge events. The clamping performance is guaranteed across the full operating temperature range of –65 °C to +175 °C.
Is SMF12A-HE3-08 qualified for automotive applications?
Yes, SMF12A-HE3-08 is AEC-Q101 qualified and rated for human body model (HBM) Class H3B (>8 kV). It undergoes rigorous stress testing-including temperature cycling, high-temperature reverse bias, and mechanical shock-to meet automotive reliability standards. Its DO-219AB package and –65 °C to +175 °C operating range make SMF12A-HE3-08 suitable for under-hood and cabin applications such as BCMs and infotainment systems.
What is the capacitance of SMF12A-HE3-08 and how does it affect signal integrity?
The SMF12A-HE3-08 exhibits 483 pF typical junction capacitance at 0 V and 1 MHz. This value is appropriate for protecting 12 V analog sensor lines, LIN bus, and low-speed digital interfaces (≤1 Mbps), where minimal signal distortion is required. While too high for USB 3.0 or HDMI 2.0, it preserves rise/fall times on 12 V control signals and avoids resonance issues in typical industrial sensor bandwidths up to 100 kHz.
Does SMF12A-HE3-08 support automated PCB assembly processes?
Yes, SMF12A-HE3-08 is fully compatible with standard SMT processes. Its DO-219AB package supports both wave and reflow soldering per J-STD-020, with a peak reflow temperature rating of 260 °C (MSL level 1). The cathode bar marking and consistent tape-and-reel orientation (per document S8-V-3717.02-003) ensure reliable pick-and-place accuracy and post-reflow inspection.
How does SMF12A-HE3-08 compare to SMF5V0A in terms of voltage ratings and use cases?
SMF12A-HE3-08 has a 12 V stand-off voltage (VRWM) and 13.3–14.7 V breakdown range, targeting 12 V automotive and industrial power rails, whereas SMF5V0A (5 V VRWM) is intended for 3.3 V/5 V logic and USB data lines. Their capacitance differs significantly (483 pF vs. 1120 pF), making SMF12A-HE3-08 more suitable for moderate-bandwidth 12 V applications where lower capacitance improves signal fidelity compared to the higher-capacitance SMF5V0A.
SMF12A-HE3-08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-219AB
- Series:
- eSMP®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 10.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 483pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF12A-HE3-08 FAQ
1.How can I place an order for SMF12A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF12A-HE3-08 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 SMF12A-HE3-08 reliable?
The price and inventory of SMF12A-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF12A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF12A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF12A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF12A-HE3-08?
SMF12A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF12A-HE3-08 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 SMF12A-HE3-08?
For technical support, including SMF12A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF12A-HE3-08 requirements.
6.How does Aetrix verify that SMF12A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF12A-HE3-08 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 SMF12A-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF12A-HE3-08?
All SMF12A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF12A-HE3-08, 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 SMF12A-HE3-08 part is unused and in its original packaging.
Return procedure for SMF12A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF12A-HE3-08 Tags
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