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Vishay SMF51A-HM3_A08
- Part No.:
- SMF51A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF51A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,066
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Product details
Overview
SMF51A-HM3_A08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for robust transient voltage suppression in high-speed data lines. It features a 51 V standoff 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 widely deployed in USB 2.0, HDMI, and industrial sensor interfaces requiring AEC-Q101-compliant surge resilience.
For engineers reviewing the SMF51A-HM3_A08 datasheet, SMF51A-HM3_A08 pinout, SMF51A-HM3_A08 application, or SMF51A-HM3_A08 equivalent, this device serves as a low-capacitance (151 pF), low-clamping, automotive-qualified TVS diode optimized for signal integrity preservation in space-constrained PCB layouts with reflow-compatible SOD-123W footprint compatibility.
Technical Context
This device operates as a unidirectional avalanche breakdown TVS diode, leveraging silicon planar junction technology to deliver fast response (<1 ns) and stable clamping under repetitive ESD transients. Its low incremental surge resistance ensures minimal voltage overshoot during 8/20 μs surges up to 1000 W per IEC 61000-4-5.
The SMF51A-HM3_A08 is rated for continuous operation from −65 °C to +175 °C, with MSL Level 1 moisture sensitivity and peak reflow temperature tolerance up to 260 °C - enabling compatibility with standard lead-free assembly processes and harsh-environment automotive electronics.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 51 V - defines maximum continuous reverse operating voltage before leakage exceeds 0.1 μA; sets safe margin below system rail voltage. |
| Clamping Voltage (VC) | 82.4 V at IPPM = 2.4 A (10/1000 μs) - limits transient-induced stress on downstream ICs during ESD events. |
| Peak Pulse Power | 200 W (10/1000 μs), 1000 W (8/20 μs) - supports both IEC 61000-4-2 and IEC 61000-4-5 compliance testing profiles. |
| Capacitance (CD) | 151 pF at VR = 0 V, f = 1 MHz - low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity without excessive rise-time degradation. |
| ESD Immunity | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 requirements for industrial and automotive end-equipment. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV, ensuring suitability for infotainment, ADAS, and body control modules. |
| Package | DO-219AB (SOD-123W compatible) - 3.9 mm × 1.9 mm × 1.08 mm low-profile outline enabling dense routing and automated placement. |
Pinout & Package
SMF51A-HM3_A08 uses a 2-terminal DO-219AB (SOD-123W-equivalent) surface-mount package with cathode-bar marking. The device has no internal circuitry beyond the single PN junction; terminal polarity is fixed and non-reversible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Signal Line Connection | Connected to protected line (e.g., USB D+, HDMI TMDS+); conducts during negative transients only in unidirectional configuration. |
| Cathode | Ground Reference Terminal | Connected to system ground or low-impedance return path; provides clamping path for positive ESD pulses above VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond turn-on enables clamping before sensitive ICs experience overvoltage - critical for high-speed serial links. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients, improving protection margin for 3.3 V and 5 V logic interfaces. |
| Wave and reflow solderable | Qualified for Pb-free reflow up to 260 °C peak, supporting J-STD-020 MSL Level 1 handling without baking or special packaging. |
| Compatible with SOD-123W footprint | Enables drop-in replacement or layout reuse across Vishay's SMF and industry-standard SOD-123W TVS families. |
| AEC-Q101 qualified | Validated for automotive applications including temperature cycling, humidity bias, and mechanical shock - no derating required for under-hood use. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
|
Use Scenario: Protecting USB 2.0 D+ and D− lines against ESD events during hot-plug insertion in portable docking stations. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and USB transceiver IC to clamp transients before they reach PHY inputs. Use Value: 151 pF capacitance avoids signal integrity degradation at 480 Mbps; ±30 kV ESD rating meets IEC 61000-4-2 Level 4 compliance. |
Use Scenario: Safeguarding HDMI TMDS channels in set-top boxes exposed to user-handling ESD in living-room environments. IC Role / Device Role / Timing Role: Standalone ESD suppressor on each differential pair, mounted adjacent to HDMI receptacle to minimize trace inductance. Use Value: 82.4 V clamping voltage preserves headroom for 3.3 V TMDS receivers; DO-219AB package fits tight 0.5 mm pitch HDMI edge connectors. |
| Automotive Sensor Interface | Industrial RS-485 Transceiver Port |
|
Use Scenario: Protecting LIN bus or analog sensor outputs (e.g., pressure, temperature) in engine control units subject to load dump and ESD. IC Role / Device Role / Timing Role: Primary ESD guard on sensor signal lines upstream of op-amp conditioning stage or ADC input. Use Value: −65 °C to +175 °C operating range matches under-hood thermal requirements; AEC-Q101 qualification eliminates need for additional qualification effort. |
Use Scenario: Shielding RS-485 transceiver I/O pins in factory automation gateways connected to long cable runs prone to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary-level transient suppressor on A/B lines, coordinated with primary GDT or MOV-based front-end protection. Use Value: 1000 W 8/20 μs surge rating handles induced surges per IEC 61000-4-5; low leakage (<0.1 μA at 51 V) prevents false triggering on idle bus states. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ51A-E3/57T | Higher clamping voltage (93.6 V), larger SMA package (4.5 mm × 2.7 mm), 400 W peak power (10/1000 μs). | Less suitable for high-speed interfaces due to higher capacitance (~200 pF) and slower response; better for lower-frequency power-line protection. | Select when board space allows larger footprint and higher clamping is acceptable for 12 V–24 V industrial buses. |
| TPD2E001DRYR | Bi-directional dual-channel array (2 × 15 pF), 5.5 V VRWM, integrated ESD protection for USB/UART, QFN-6 package. | Designed for low-voltage digital I/O (1.8 V–5.5 V), not rated for 51 V standoff or AEC-Q101; lacks high-energy surge capability. | Choose for compact multi-line protection in consumer electronics where VRWM ≤ 5.5 V and sub-20 pF capacitance is mandatory. |
Compared with SMAJ51A-E3/57T and TPD2E001DRYR, SMF51A-HM3_A08 uniquely balances 51 V standoff, 151 pF capacitance, AEC-Q101 qualification, and DO-219AB miniaturization - making it optimal for automotive and industrial high-speed signal lines needing certified, space-efficient ESD hardening.
Availability
SMF51A-HM3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and automotive sensor interface applications requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMF51A-HM3_A08 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 manufacturer of discrete semiconductors and passive components, specializing in high-reliability solutions for automotive, industrial, and computing markets.
The SMF series is part of Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for space-constrained, high-surge-resilience applications in automotive electronics and industrial connectivity systems.
FAQ
What is the standoff voltage rating of SMF51A-HM3_A08?
The SMF51A-HM3_A08 has a maximum working standoff voltage (VRWM) of 51 V, meaning it remains in high-impedance blocking mode up to this reverse voltage while leaking less than 0.1 μA. This rating ensures compatibility with 48 V nominal industrial buses and 36 V automotive systems where transient margins must exceed steady-state rails.
Is SMF51A-HM3_A08 AEC-Q101 qualified?
Yes, SMF51A-HM3_A08 is AEC-Q101 qualified, having passed stress tests including human body model ESD (>8 kV), temperature cycling, and high-temperature operating life. This qualification confirms its suitability for automotive applications such as body control modules, infotainment interfaces, and sensor nodes without additional reliability screening.
What is the clamping voltage of SMF51A-HM3_A08 at rated peak pulse current?
The SMF51A-HM3_A08 exhibits a maximum clamping voltage (VC) of 82.4 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 2.4 A. This value is measured per standard test conditions and defines the upper voltage limit imposed on protected circuitry during an ESD event.
Does SMF51A-HM3_A08 support lead-free reflow soldering?
Yes, SMF51A-HM3_A08 is qualified for lead-free reflow soldering with a peak temperature tolerance of up to 260 °C, compliant with J-STD-020 MSL Level 1. Its DO-219AB package requires no pre-baking and supports standard SMT assembly processes used in high-volume automotive and industrial manufacturing.
What is the typical junction capacitance of SMF51A-HM3_A08 at zero bias?
The typical junction capacitance (CD) of SMF51A-HM3_A08 is 151 pF at VR = 0 V and f = 1 MHz. This value is confirmed in Vishay's electrical characteristics table and enables reliable use in USB 2.0 and HDMI 1.4 signal paths where capacitance must remain below ~200 pF to avoid measurable eye-diagram degradation.
SMF51A-HM3_A08 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay
- 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:
- -
- Capacitance @ Frequency:
- 151pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF51A-HM3_A08 FAQ
1.How can I place an order for SMF51A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF51A-HM3_A08 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-HM3_A08 reliable?
The price and inventory of SMF51A-HM3_A08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF51A-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF51A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF51A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF51A-HM3_A08?
SMF51A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF51A-HM3_A08 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-HM3_A08?
For technical support, including SMF51A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF51A-HM3_A08 requirements.
6.How does Aetrix verify that SMF51A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF51A-HM3_A08 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-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF51A-HM3_A08?
All SMF51A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF51A-HM3_A08, 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-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF51A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF51A-HM3_A08 Tags
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