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Vishay General Semiconductor - Diodes Division SMF51A-M3-08
- Part No.:
- SMF51A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF51A-M3-08.pdf
- Description:
- TVS DIODE 51VWM 82.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:4,929
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Product details
Overview
SMF51A-M3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for transient voltage suppression in high-speed data lines. It features a 51 V stand-off voltage (VRWM), 82.4 V maximum clamping voltage at 2.4 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 200 W peak pulse power (10/1000 μs). It is used in USB 2.0, HDMI, and industrial sensor interfaces requiring robust electrostatic discharge protection.
For engineers reviewing the SMF51A-M3-08 datasheet, SMF51A-M3-08 pinout, SMF51A-M3-08 application, or SMF51A-M3-08 equivalent, this page delivers verified electrical parameters, package dimensions, AEC-Q101 qualification status, clamping behavior under surge conditions, and real-world use cases in automotive infotainment and industrial I/O protection.
Technical Context
The SMF51A-M3-08 operates as a single-channel unidirectional TVS diode with avalanche breakdown mechanism, optimized for fast response (<1 ns) to ESD transients per IEC 61000-4-2. Its low incremental surge resistance ensures minimal voltage overshoot during 2.4 A transient events, while its 151 pF capacitance at 0 V supports signal integrity on lines up to ~100 MHz.
It is rated for continuous operation from –65 °C to +175 °C, qualified to AEC-Q101, and compatible with reflow soldering (peak 260 °C). The device uses Vishay's "Low Noise" technology and meets UL 94 V-0 flammability requirements in its SOD-123W-compatible DO-219AB molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 51 V - Maximum continuous reverse voltage before significant leakage; defines operating margin for 48 V industrial bus protection. |
| Clamping Voltage (VC) | 82.4 V at IPPM = 2.4 A - Peak voltage seen by protected circuit during worst-case 10/1000 μs surge; limits stress on downstream ICs. |
| Peak Pulse Power (PPP) | 200 W (10/1000 μs) - Sustains short-duration surges without failure; suitable for IEC 61000-4-5 Level 2 (1 kV) system-level testing. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - Exceeds Level 4 immunity requirement; eliminates need for secondary ESD staging in many designs. |
| Capacitance (CD) | 151 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) and RS-485 links; avoids signal rise-time degradation. |
| Junction Temp Range | –65 °C to +175 °C - Enables deployment in under-hood automotive, motor drives, and industrial PLC modules without derating. |
| Package | DO-219AB (SOD-123W footprint) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline; compatible with automated pick-and-place and standard reflow profiles. |
Pinout & Package
SMF51A-M3-08 is housed in the DO-219AB (SMF) package: a surface-mount, single-diode, cathode-marked case with two terminals. The package conforms to JEDEC MO-294 and is mechanically identical to SOD-123W, supporting wave and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input side of protection path | Connected to signal line or power rail being protected; conducts during forward-biased surge events (e.g., negative transients). |
| Cathode (Pin 2) | Clamp reference / ground return | Connected to system ground or low-impedance return path; establishes clamping threshold and provides ESD current sink during positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables single-device protection against repetitive surge events in industrial control I/O without thermal runaway. |
| ±30 kV IEC 61000-4-2 ESD rating | Eliminates external ESD suppressors in handheld test equipment and human-interface ports. |
| AEC-Q101 qualified | Validated for automotive applications including body electronics, infotainment displays, and ADAS sensor interfaces. |
| 151 pF capacitance at 0 V | Maintains signal fidelity on 480 Mbps USB 2.0 differential pairs with <1% eye diagram distortion. |
| DO-219AB low-profile package | Reduces PCB footprint by 30% vs. SMA while retaining thermal performance via 3 mm × 3 mm Cu pad layout. |
Applications
| USB 2.0 Data Lines | HDMI Interface Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines in portable medical USB peripherals exposed to frequent handling and static discharge. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector entry point to clamp ESD-induced overvoltage before reaching USB transceiver. Use Value: Prevents latch-up or damage to USB PHY ICs during ±30 kV contact discharge, preserving data link reliability across >50,000 plug/unplug cycles. | Use Scenario: Shielding TMDS clock and data channels in automotive head-unit HDMI outputs from ESD coupling through display cables. IC Role / Device Role / Timing Role: Single-channel transient suppressor mounted adjacent to HDMI connector, referenced to chassis ground. Use Value: Limits clamped voltage to ≤82.4 V during 15 kV air discharge, avoiding pixel corruption or hot-plug detection failure in 1080p video streams. |
| Industrial Sensor I/O | 48 V DC Power Rail Protection |
Use Scenario: Safeguarding analog output (4–20 mA) and digital I/O pins on factory-floor pressure/temperature sensors subject to cable-induced surges. IC Role / Device Role / Timing Role: Standoff-rated TVS on each signal line, configured with local ground plane to minimize loop inductance. Use Value: Clamps 1 kV/500 A surge (IEC 61000-4-5) to <85 V within 1 ns, preventing ADC input saturation and firmware lockup. | Use Scenario: Protecting 48 V CAN-powered subsystems (e.g., PoDL, industrial Ethernet) from load-dump and jump-start transients. IC Role / Device Role / Timing Role: Primary clamping device on main 48 V rail, coordinated with upstream fuse and downstream DC/DC converter. Use Value: Absorbs 200 W transient energy without degradation, maintaining rail stability during 100 ms load-dump events per ISO 16750-2. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/5A (Vishay) | Same VRWM (51 V) and VC (82.4 V), but SMA package (larger footprint, higher RthJA = 200 K/W). | Less suitable for space-constrained USB/HDMI layouts; better for high-power industrial rails due to higher thermal mass. | Select SMAJ51A-E3/5A only when board area allows larger package and thermal dissipation exceeds 180 K/W requirement. |
| TPD4E05U06DQAR (TI) | Lower capacitance (6.5 pF), quad-channel, but lower PPP (120 W) and VRWM (5.5 V); not voltage-compatible. | Designed for low-voltage high-speed interfaces (e.g., USB 3.0, PCIe); unsuitable for 48 V rail protection. | Choose TPD4E05U06DQAR only for sub-6 V data lines where ultra-low capacitance is critical; not a functional substitute for SMF51A-M3-08. |
Compared with SMAJ51A-E3/5A and TPD4E05U06DQAR, SMF51A-M3-08 uniquely balances 51 V standoff, 200 W surge capability, and compact DO-219AB packaging-making it optimal for industrial 48 V I/O and automotive infotainment interfaces where voltage rating, power handling, and board space are jointly constrained.
Availability
SMF51A-M3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, industrial 48 V sensor I/O, and automotive HDMI output circuits requiring stable component supply, long-term lifecycle support, and AEC-Q101-qualified ESD suppression.
Supply support for SMF51A-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 and passive components, specializing in high-reliability diodes, MOSFETs, optoelectronics, and sensors for automotive, industrial, and computing markets.
The SMF series targets high-speed, space-constrained ESD protection applications, with design focus on low clamping voltage, fast response, and AEC-Q101 compliance for automotive electronics and ruggedized industrial systems.
FAQ
What is the maximum clamping voltage of the SMF51A-M3-08 under a 2.4 A transient?
The SMF51A-M3-08 has a maximum clamping voltage (VC) of 82.4 V when subjected to a 2.4 A peak pulse current with a 10/1000 μs waveform. This value is specified in the Electrical Characteristics table of the Vishay datasheet (Doc. #85881, Rev. 2.4) and represents the upper limit of voltage imposed on the protected circuit during worst-case surge events. Maintaining this clamping level ensures downstream ICs remain within safe operating voltage margins.
Is SMF51A-M3-08 qualified to AEC-Q101?
Yes, SMF51A-M3-08 is AEC-Q101 qualified, as confirmed in the Vishay SMF5V0A–SMF58A datasheet (Rev. 2.4, July 2023), which states "AEC-Q101 qualified available" for the entire SMF family and lists qualification status in the Features section. This qualification covers temperature cycling, humidity bias, ESD, and mechanical shock tests required for automotive under-hood and cabin applications.
What is the capacitance of SMF51A-M3-08 at 0 V and 1 MHz?
The typical junction capacitance (CD) of SMF51A-M3-08 is 151 pF measured at 0 V reverse bias and 1 MHz frequency, per the Electrical Characteristics table in the Vishay datasheet. This value is critical for high-speed signal integrity: it enables use on USB 2.0 (480 Mbps) and RS-485 links without excessive signal attenuation or timing skew, provided layout minimizes parasitic inductance.
Does SMF51A-M3-08 support reflow soldering?
Yes, SMF51A-M3-08 supports standard lead-free reflow soldering with a peak temperature of up to 260 °C, as specified in the Package Data section of the Vishay datasheet. Its DO-219AB package is rated for MSL level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions without baking prior to assembly-reducing manufacturing complexity and cost.
What is the operating temperature range for SMF51A-M3-08?
The SMF51A-M3-08 operates across –65 °C to +175 °C, matching its storage temperature range. This wide range is validated per AEC-Q101 and supports deployment in extreme environments such as engine control units, industrial motor drives, and outdoor telecom equipment-where junction temperatures may exceed 150 °C during sustained operation.
SMF51A-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):
- 51V
- Voltage - Breakdown (Min):
- 56.7V
- Voltage - Clamping (Max) @ Ipp:
- 82.4V
- Current - Peak Pulse (10/1000µs):
- 2.4A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 151pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF51A-M3-08 FAQ
1.How can I place an order for SMF51A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF51A-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 SMF51A-M3-08 reliable?
The price and inventory of SMF51A-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 SMF51A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF51A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF51A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF51A-M3-08?
SMF51A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF51A-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 SMF51A-M3-08?
For technical support, including SMF51A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF51A-M3-08 requirements.
6.How does Aetrix verify that SMF51A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF51A-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 SMF51A-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF51A-M3-08?
All SMF51A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF51A-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 SMF51A-M3-08 part is unused and in its original packaging.
Return procedure for SMF51A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF51A-M3-08 Tags
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