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Vishay General Semiconductor - Diodes Division SMF30A-M3-08
- Part No.:
- SMF30A-M3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF30A-M3-08.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:29,800
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Product details
Overview
SMF30A-M3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for low-capacitance transient suppression on high-speed data lines. It features a 30 V stand-off voltage (VRWM), 48.4 A peak pulse current (IPPM) at 10/1000 μs, 4.1 A maximum reverse leakage (IR) at VRWM, 207 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF30A-M3-08 datasheet, SMF30A-M3-08 pinout, SMF30A-M3-08 application, or SMF30A-M3-08 equivalent, this page delivers verified electrical specs, package dimensions, clamping behavior under surge conditions, real-world ESD immunity validation, and direct alternatives with documented parameter trade-offs for signal integrity-critical designs.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its reverse stand-off voltage of 30 V while maintaining sub-5 μA leakage below that threshold. Its low 207 pF junction capacitance and fast response time enable use on 480 Mbps USB 2.0 differential pairs without signal degradation.
The SMF30A-M3-08 meets AEC-Q101 qualification for automotive-grade reliability and supports wave/reflow soldering per J-STD-020 MSL level 1. Thermal resistance (RthJA) is 180 K/W when mounted on 3 mm × 3 mm Cu pads, enabling robust power dissipation during repetitive ESD events.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 30 V - defines maximum continuous operating voltage before clamping begins; sets safe margin for 24 V industrial bus lines. |
| Peak Pulse Current (IPPM) | 48.4 A at 10/1000 μs - quantifies surge-handling capability for lightning-induced surges in factory automation I/O modules. |
| Clamping Voltage (VC) | 48.4 V at IPPM - actual voltage seen by protected IC during worst-case transient; stays below 5.5 V logic rail tolerance for microcontrollers. |
| Junction Capacitance (CD) | 207 pF at 0 V, 1 MHz - low enough to avoid signal rise-time degradation on USB 2.0 D+/D− lines (max 250 pF recommended). |
| ESD Immunity | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 requirements for medical handheld devices and industrial HMI panels. |
| Reverse Leakage (IR) | 0.1 μA at VRWM - negligible bias current draw in battery-powered IoT sensors, preserving multi-year shelf life. |
| Package | DO-219AB (SOD-123W) - 3.9 mm × 1.9 mm × 1.08 mm footprint compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
SMF30A-M3-08 uses a 2-terminal DO-219AB (SOD-123W) package with cathode-bar marking. The anode and cathode terminals are arranged linearly; polarity is indicated by a molded cathode band at one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point during forward conduction; tied to protected line (e.g., USB D+) | Connects directly to signal trace requiring ESD protection; forms low-impedance path to ground during overvoltage events. |
| Cathode (bar-marked end) | Current exit point during clamping; connected to system ground plane | Must be routed to low-inductance ground via short, wide trace to minimize clamping voltage overshoot during fast transients. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables reliable protection against multiple ESD strikes without parametric shift in telecom front-end receivers. |
| Low incremental surge resistance | Minimizes voltage overshoot during sub-nanosecond ESD events, critical for safeguarding 1.8 V I/O pins on FPGAs. |
| AEC-Q101 qualified | Validated for automotive infotainment display interfaces subject to temperature cycling (-65 °C to +175 °C). |
| "Low Noise" fast-response technology | Sub-1 ns response ensures clamping activation before transient energy couples into sensitive analog front-ends. |
| SOD-123W package compatibility | Allows drop-in replacement in existing layouts using industry-standard SOD-123 footprints with enhanced thermal performance. |
Applications
| Industrial Sensor Interface | USB 2.0 Port Protection |
|---|---|
|
Use Scenario: Protecting 4–20 mA current-loop transmitters and RS-485 nodes in factory floor PLCs exposed to cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground to shunt ESD energy before it reaches isolation amplifiers. Use Value: 30 V VRWM aligns with 24 V supply rails; 48.4 V clamping prevents latch-up in AD74115H analog input ICs. |
Use Scenario: Safeguarding USB 2.0 D+ and D− lines on embedded host controllers in medical diagnostic equipment. IC Role / Device Role / Timing Role: Low-capacitance ESD suppressor placed immediately at connector to limit transient coupling into USB PHY. Use Value: 207 pF capacitance avoids violating USB 2.0 eye diagram mask; ±30 kV ESD rating satisfies IEC 60601-1-2 Clause 8. |
| HDMI Source Port | Automotive Infotainment Display |
|
Use Scenario: Transient suppression on HDMI TMDS clock and data channels in set-top box video outputs. IC Role / Device Role / Timing Role: Single-channel unidirectional clamp on each TMDS pair, referenced to local digital ground. Use Value: Fast response time preserves 165 MHz pixel clock integrity; 48.4 V VC remains below HDMI receiver absolute max rating (5.5 V). |
Use Scenario: ESD protection for LVDS display data lanes in automotive head units subjected to door-handle discharge. IC Role / Device Role / Timing Role: Signal-line TVS on each LVDS pair, mounted within 5 mm of connector per AEC-Q100 layout guidelines. Use Value: AEC-Q101 qualification ensures operation across -40 °C to +125 °C ambient; DO-219AB package withstands mechanical vibration per JESD22-B103. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/5A (Vishay) | Higher 700 pF capacitance; SMA package (larger footprint, higher RthJA = 220 K/W) | Less suitable for >100 Mbps data lines; better for power-rail protection due to 1000 W PPP rating | Select SMAJ30A-E3/5A only when protecting 24 V DC inputs where capacitance is non-critical and PCB space allows SMA. |
| TPD2E001DRYR (TI) | 2-channel array; 15 pF per channel; 12 V VRWM; not AEC-Q101 qualified | Designed for dual-line protection (e.g., USB D+/D−); requires redesign for single-line use | Choose TPD2E001DRYR for compact dual-line USB 2.0 protection but verify system-level ESD testing if replacing SMF30A-M3-08 in automotive contexts. |
Compared with SMAJ30A-E3/5A and TPD2E001DRYR, SMF30A-M3-08 offers optimal balance of low capacitance, AEC-Q101 compliance, and DO-219AB board area efficiency - making it preferred for high-speed, space-constrained, and automotive-qualified signal-line protection.
Availability
SMF30A-M3-08 is available at Aetrix Electronics and suitable for industrial sensor interfaces, USB 2.0 port protection, HDMI source ports, and automotive infotainment displays requiring stable component supply across extended product lifecycles.
Supply support for SMF30A-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, and passive components for automotive, industrial, and computing markets.
The SMF series targets high-speed interface protection with optimized capacitance-clamping trade-offs, specifically engineered for USB, HDMI, LVDS, and industrial fieldbus applications demanding AEC-Q101 or IEC 61000-4-2 compliance.
FAQ
What is the clamping voltage of SMF30A-M3-08 at its rated peak pulse current?
The SMF30A-M3-08 has a maximum clamping voltage (VC) of 48.4 V when subjected to its rated 48.4 A peak pulse current (IPPM) under a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs with 5.5 V absolute maximum ratings remain within safe operating limits during surge events. The SMF30A-M3-08 maintains this clamping performance across its full operating temperature range of -65 °C to +175 °C.
Is SMF30A-M3-08 qualified for automotive applications?
Yes, SMF30A-M3-08 is AEC-Q101 qualified, confirming its suitability for automotive electronic systems including infotainment displays, body control modules, and ADAS sensor interfaces. The qualification covers stress tests for temperature cycling, humidity, mechanical shock, and ESD - all performed on the exact DO-219AB packaged SMF30A-M3-08. This makes SMF30A-M3-08 appropriate for under-hood and cabin applications where reliability across extreme thermal and vibration environments is mandatory.
What is the junction capacitance of SMF30A-M3-08 and how does it affect high-speed signal integrity?
The SMF30A-M3-08 exhibits 207 pF typical junction capacitance at 0 V and 1 MHz, measured per the manufacturer's characterization. This low value minimizes signal distortion on high-speed lines such as USB 2.0 (480 Mbps), where total trace + component capacitance must stay below ~250 pF to meet eye diagram specifications. The SMF30A-M3-08's capacitance remains stable up to 10 V reverse bias, ensuring consistent performance across varying common-mode voltages in differential signaling applications.
Can SMF30A-M3-08 replace older SMAJ or P6KE series TVS diodes in existing designs?
SMF30A-M3-08 is not a direct pin-compatible replacement for SMAJ or P6KE series due to its smaller DO-219AB package and different thermal profile. While both share 30 V VRWM and similar clamping behavior, the SMF30A-M3-08's lower RthJA (180 K/W vs. ~220 K/W for SMAJ) and reduced capacitance require layout review. Replacing SMAJ30A with SMF30A-M3-08 may improve signal integrity but demands verification of ground trace inductance and thermal relief design to fully leverage its superior surge response.
Does SMF30A-M3-08 support lead-free reflow soldering processes?
Yes, SMF30A-M3-08 is fully compatible with lead-free reflow soldering per J-STD-020, rated for peak temperatures up to 260 °C. Its DO-219AB package uses matte tin terminations and UL 94 V-0 molding compound, meeting RoHS and JEDEC standards. The device is supplied on 8 mm tape (3K per 7″ reel, MOQ = 30K), with moisture sensitivity level (MSL) 1 - meaning it can be stored indefinitely at ≤30 °C/60% RH without baking prior to assembly. This ensures seamless integration into modern SMT production lines handling SMF30A-M3-08.
SMF30A-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 4.1A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF30A-M3-08 FAQ
1.How can I place an order for SMF30A-M3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF30A-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 SMF30A-M3-08 reliable?
The price and inventory of SMF30A-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 SMF30A-M3-08 is usually 5 days.
3.What payment methods are accepted for SMF30A-M3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF30A-M3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF30A-M3-08?
SMF30A-M3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF30A-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 SMF30A-M3-08?
For technical support, including SMF30A-M3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF30A-M3-08 requirements.
6.How does Aetrix verify that SMF30A-M3-08 is sourced from the original manufacturer or authorized distributors?
All SMF30A-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 SMF30A-M3-08 meets industry standards.
7.What is the process for return or replacement of SMF30A-M3-08?
All SMF30A-M3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF30A-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 SMF30A-M3-08 part is unused and in its original packaging.
Return procedure for SMF30A-M3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF30A-M3-08 Tags
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