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Vishay General Semiconductor - Diodes Division SMF14A-M3-08
- Part No.:
- SMF14A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF14A-M3-08.pdf
- Description:
- TVS DIODE 14VWM 23.2VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:86,848
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Product details
Overview
SMF14A-M3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for low-capacitance transient suppression in high-speed data lines. It features a 14 V stand-off voltage (VRWM), 23.2 A peak pulse current (IPPM) under 10/1000 μs waveform, 23.2 V maximum clamping voltage (VC) at IPPM, ±30 kV IEC 61000-4-2 ESD immunity, and 392 pF typical junction capacitance at 0 V - deployed in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF14A-M3-08 datasheet, SMF14A-M3-08 pinout, SMF14A-M3-08 application, or SMF14A-M3-08 equivalent, key selection criteria include clamping voltage margin relative to IC I/O rail, capacitance impact on signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above VRWM while maintaining low leakage (<0.1 μA at 14 V). Its low incremental surge resistance ensures rapid voltage stabilization during ESD events, and its "Low Noise" technology delivers sub-nanosecond response time critical for protecting high-bandwidth analog and digital I/Os.
The SMF14A-M3-08 is optimized for board-level ESD hardening in space-constrained applications, with thermal resistance RthJA of 180 K/W on standard epoxy-glass PCBs and operation across -65 °C to +175 °C - supporting automotive under-hood and industrial control environments where reliability under thermal cycling is essential.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 14 V - maximum continuous reverse voltage before significant leakage; sets upper limit for protected line operating voltage |
| Clamping Voltage (VC) | 23.2 V max at 8.6 A IPPM (10/1000 μs) - defines worst-case overvoltage seen by downstream IC during surge |
| Junction Capacitance (CD) | 392 pF at 0 V, 1 MHz - impacts signal rise/fall times; suitable for ≤480 Mbps USB 2.0 but not USB 3.0 Gen1 |
| ESD Withstand | ±30 kV contact & air discharge per IEC 61000-4-2 - exceeds Level 4 immunity requirement for end-equipment certification |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - supports robust protection against lightning-induced surges per IEC 61000-4-5 |
| Operating Temperature | -65 °C to +175 °C - enables use in automotive powertrain, industrial motor drives, and outdoor telecom equipment |
| AEC-Q101 Qualified | Yes - validated for automotive electronics per stress test requirements including HBM >8 kV and temperature cycling |
Pinout & Package
SMF14A-M3-08 uses the DO-219AB (SMF) package: low-profile, surface-mount, cathode-bar marked, compatible with SOD-123W footprint. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), MSL level 1, reflow-compatible up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Ground reference terminal | Connected to system ground or low-impedance return path; forms clamping path during positive transients |
| Cathode | Protected line terminal | Connected directly to I/O line (e.g., USB D+); conducts avalanche current when line voltage exceeds VRWM |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables reliable protection against repetitive ESD and surge events without degradation in compact layouts |
| ±30 kV IEC 61000-4-2 ESD immunity | Meets highest industrial and automotive ESD immunity class without external shielding or layout derating |
| 392 pF junction capacitance | Preserves signal integrity on 480 Mbps USB 2.0 and 100 Mbps Ethernet PHY lines with <1% rise-time degradation |
| AEC-Q101 qualified | Validated for automotive Grade 1–3 applications including infotainment, ADAS sensors, and body control modules |
| DO-219AB (SMF) package | Reduces PCB area by 30% vs. SMA; supports high-density routing and automated optical inspection (AOI) compatibility |
Applications
| USB 2.0 Interface Protection | HDMI Source Port Clamping |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D- lines from ESD events during hot-plug insertion in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and USB transceiver IC, referenced to chassis ground. Use Value: 392 pF capacitance avoids signal distortion at 480 Mbps; 23.2 V clamping prevents damage to 3.3 V tolerant PHY inputs. | Use Scenario: Safeguarding HDMI source pins (TMDS channels) in set-top boxes exposed to user-handling ESD in living-room environments. IC Role / Device Role / Timing Role: Single-channel clamping device on each TMDS+ line, with cathode tied to signal and anode to ground. Use Value: ±30 kV ESD rating meets IEC 61000-4-2 Level 4; low profile allows placement adjacent to HDMI connector without height interference. |
| Automotive Sensor Signal Lines | Industrial CAN FD Transceiver I/O |
Use Scenario: Protecting analog output lines (e.g., 0–5 V throttle position sensor) in engine control units subject to under-hood ESD and load dump coupling. IC Role / Device Role / Timing Role: Standoff-clamp TVS on sensor output trace, positioned within 2 mm of connector entry point. Use Value: -65 °C to +175 °C operating range ensures functionality during cold cranking and exhaust heat exposure; 14 V VRWM matches 5 V sensor supply rails with margin. | Use Scenario: Adding secondary ESD protection on CAN FD transceiver RX/TX pins in factory automation gateways where primary protection resides upstream. IC Role / Device Role / Timing Role: Low-capacitance unidirectional suppressor on each CANH/CANL line, grounded via shortest possible path. Use Value: 23.2 V clamping voltage stays below CAN FD transceiver absolute maximum ratings (typically 40 V); DO-219AB footprint fits tight spacing around transceiver QFN. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ14A-E3/57T | Higher clamping voltage (25.8 V), larger SMA package (4.5 mm × 2.7 mm), 500 pF capacitance | Less suitable for high-speed lines; better for lower-frequency power rails or legacy designs with SMA footprints | Select if existing layout uses SMA pads and signal bandwidth <100 Mbps |
| TPD2E001DRYR | Bi-directional dual-channel array, 10 pF capacitance, 5 V VRWM, not AEC-Q101 qualified | Designed for ultra-high-speed USB 3.0/MIPI; lacks automotive qualification and higher-voltage standoff | Select only for non-automotive, low-capacitance, multi-line protection where VRWM ≤5 V is acceptable |
Compared with SMAJ14A-E3/57T and TPD2E001DRYR, SMF14A-M3-08 offers optimal balance of low capacitance (392 pF), automotive qualification, and compact DO-219AB footprint - making it preferred for new USB 2.0, HDMI, and automotive sensor designs requiring certified ESD resilience in minimal board area.
Availability
SMF14A-M3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor signal conditioning, and industrial CAN FD transceiver hardening requiring stable component supply and long-term lifecycle support.
Supply support for SMF14A-M3-08 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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets board-level ESD protection in space-constrained, high-reliability applications - engineered for AEC-Q101 compliance, low-profile mounting, and precise clamping performance across extended temperature ranges.
FAQ
What is the maximum clamping voltage of SMF14A-M3-08 under standard IEC 61000-4-2 ESD conditions?
The SMF14A-M3-08 does not specify clamping voltage under direct IEC 61000-4-2 test conditions; its 23.2 V VC rating applies to the 10/1000 μs waveform at 8.6 A IPPM. For ESD events, the device responds in <1 ns to clamp transients to ≤23.2 V - verified via TLP testing and consistent with its ±30 kV contact/air discharge rating. This clamping behavior is intrinsic to the SMF14A-M3-08's silicon avalanche structure.
Is SMF14A-M3-08 qualified to AEC-Q101, and what tests does that include?
Yes, SMF14A-M3-08 is AEC-Q101 qualified. Certification includes human body model (HBM) testing >8 kV (Class H3B), temperature cycling (-65 °C to +175 °C), high-temperature operating life, and unbiased highly accelerated stress test (uHAST). These tests validate the SMF14A-M3-08 for automotive powertrain, chassis, and body electronics where long-term reliability under thermal and electrical stress is mandatory.
Can SMF14A-M3-08 be used in bidirectional signal lines like RS-485 or CAN?
No - SMF14A-M3-08 is a unidirectional TVS diode, rated only for clamping positive transients on cathode-connected lines. For bidirectional protocols such as RS-485 or CAN, a bidirectional variant (e.g., SMF14CA-M3-08) or dual-diode configuration is required. Using SMF14A-M3-08 on a bidirectional line risks forward conduction during negative transients, potentially damaging the SMF14A-M3-08 or downstream circuitry.
What is the recommended PCB footprint for SMF14A-M3-08, and how does it compare to SOD-123W?
The SMF14A-M3-08 uses the DO-219AB package, which is mechanically compatible with the SOD-123W footprint per Vishay's documentation. Recommended pad dimensions are 1.3 mm × 1.3 mm (anode/cathode), 2.9 mm center-to-center length, and 1.4 mm width - matching SOD-123W land patterns. This compatibility allows drop-in replacement in existing SOD-123W layouts without redesign, preserving the SMF14A-M3-08's assembly efficiency.
How does the 392 pF junction capacitance of SMF14A-M3-08 affect USB 2.0 signal integrity?
The 392 pF capacitance of SMF14A-M3-08 introduces <1.5% rise-time degradation on 480 Mbps USB 2.0 signals when placed with minimal trace length (<3 mm) between connector and transceiver. Measured eye diagrams confirm pass/fail compliance with USB-IF specifications; however, this capacitance makes SMF14A-M3-08 unsuitable for USB 3.0 Gen1 (5 Gbps) where <1.5 pF is typically required. The SMF14A-M3-08 is thus optimized for cost-sensitive, high-reliability USB 2.0 implementations.
SMF14A-M3-08 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):
- 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:
- General Purpose
- Capacitance @ Frequency:
- 392pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF14A-M3-08 FAQ
1.How can I place an order for SMF14A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF14A-M3-08 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 SMF14A-M3-08 reliable?
The price and inventory of SMF14A-M3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF14A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF14A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF14A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF14A-M3-08?
SMF14A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF14A-M3-08 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 SMF14A-M3-08?
For technical support, including SMF14A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF14A-M3-08 requirements.
6.How does Aetrix verify that SMF14A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF14A-M3-08 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 SMF14A-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF14A-M3-08?
All SMF14A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF14A-M3-08, 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 SMF14A-M3-08 part is unused and in its original packaging.
Return procedure for SMF14A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF14A-M3-08 Tags
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