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Vishay General Semiconductor - Diodes Division SMF30A-HM3-08
- Part No.:
- SMF30A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF30A-HM3-08.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:28,076
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Product details
Overview
SMF30A-HM3-08 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 and power rails. 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 1 MHz, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment interfaces and USB 2.0 ports.
For engineers reviewing the SMF30A-HM3-08 datasheet, SMF30A-HM3-08 pinout, SMF30A-HM3-08 application, or SMF30A-HM3-08 equivalent, key selection criteria include clamping voltage under surge, capacitance impact on signal integrity, AEC-Q101 qualification status, thermal resistance (RthJA = 180 K/W), and compatibility with SOD-123W footprint layouts.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its reverse standoff voltage of 30 V. Its low clamping voltage (VC ≤ 48.4 V at IPPM) and fast response time (<1 ns) enable effective protection of sensitive downstream ICs without signal distortion.
The SMF30A-HM3-08 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and meets AEC-Q101 stress requirements including H3B-class ESD (>8 kV HBM) and operating temperature range of −65 °C to +175 °C - confirming suitability for under-hood and instrument cluster applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 30 V - maximum continuous reverse voltage before clamping begins; defines safe operating margin for 24 V automotive systems. |
| Breakdown Voltage (VBR) | 33.3–36.9 V at 1 mA - ensures reliable triggering above normal operating rail with controlled tolerance band. |
| Peak Pulse Current (IPPM) | 4.1 A at 10/1000 μs - supports robust surge handling per IEC 61000-4-5 Level 3 (1 kV line-to-ground). |
| Clamping Voltage (VC) | ≤ 48.4 V at IPPM - limits voltage seen by protected IC to safe level during 4.1 A transient event. |
| Capacitance (CD) | 207 pF at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) but requires layout de-tuning for >1 Gbps interfaces. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds industrial and automotive ESD immunity requirements. |
| Thermal Resistance (RthJA) | 180 K/W - dictates PCB copper pad area needed (3 mm × 3 mm, ≥40 μm) to maintain TJ ≤ 175 °C under surge. |
Pinout & Package
SMF30A-HM3-08 uses the DO-219AB (SMF) package: low-profile (1.08 mm max height), SOD-123W-compatible outline, molded UL 94 V-0 compound, MSL Level 1, and reflow-solderable with peak temperature ≤260 °C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to signal or power line requiring protection; referenced to system ground via cathode. |
| Cathode | Ground reference | Connected to low-impedance chassis or PCB ground plane; carries full surge current to earth. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables sustained protection against repetitive surges in CAN/LIN bus nodes without thermal runaway. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1), improving clamping fidelity. |
| "Low Noise" fast-response technology | Sub-nanosecond response ensures clamping activation before ESD energy couples into IC input structures. |
| AEC-Q101 qualified variant available | SMF30A-HM3-08 includes AEC-Q101 qualification per Rev. 2.4 - validated for automotive-grade reliability and lifetime stress. |
| SOD-123W/SOD-123F footprint compatibility | Allows drop-in replacement or shared PCB land pattern across Vishay's SMF and legacy SOD-123 families. |
Applications
| Automotive Infotainment Display Interface | USB 2.0 Data Line Protection |
|---|---|
Use Scenario: Protecting LVDS or FPD-Link III video data lines between head unit and TFT display in vehicles exposed to ESD during service or connector mating. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline on each differential pair, referenced to chassis ground. Use Value: 207 pF capacitance avoids signal integrity degradation at 1.5 Gbps; ±30 kV ESD rating prevents latch-up in display driver ICs. |
Use Scenario: Safeguarding D+ and D− lines of USB 2.0 ports in automotive telematics modules against hot-plug ESD and cable discharge events. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional placement with cathode to VBUS enables lower capacitance than bidirectional alternatives. Use Value: 30 V VRWM aligns with USB VBUS tolerance; 48.4 V VC ensures microcontroller I/O remains below absolute maximum ratings during 8 kV contact discharge. |
| Industrial PLC Digital I/O Module | Automotive Body Control Unit (BCU) Power Rail |
Use Scenario: Shielding 24 V digital input channels (e.g., limit switches, sensors) from induced surges in factory floor environments with high EMI. IC Role / Device Role / Timing Role: Standoff-rated TVS placed between field input and optocoupler input, with series current-limiting resistor. Use Value: 200 W pulse rating handles IEC 61000-4-4 fast transients; 175 °C max junction temperature supports operation in sealed enclosures. |
Use Scenario: Clamping load-dump transients on 12 V supply rails feeding microcontrollers and CAN transceivers in door modules or lighting controllers. IC Role / Device Role / Timing Role: Parallel-connected TVS on main VBAT feed, sized to absorb 1000 W (8/20 μs) per ISO 7637-2 pulse 5a. Use Value: 1000 W peak power rating and 180 K/W RthJA allow direct mounting on power plane without heatsink in space-constrained BCU PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP3052-030HTG | 30 V VRWM, 300 W (10/1000 μs), 120 pF, SOD-323 package | Lower capacitance suits high-speed USB 3.0/MIPI; smaller footprint but lower surge rating | Select when board space is critical and surge threat is limited to IEC 61000-4-2 only. |
| ON Semiconductor SZ1.5SMC33A | 33 V VRWM, 1500 W (10/1000 μs), 300 pF, DO-214AB package | Higher power handling for load-dump; larger size and higher capacitance limit use in data lines | Prefer for 12 V rail clamping where PCB area allows and ESD is secondary to surge. |
Compared with SP3052-030HTG and SZ1.5SMC33A, SMF30A-HM3-08 delivers balanced performance: sufficient 200 W surge rating for most automotive data lines, 207 pF capacitance compatible with USB 2.0, and AEC-Q101 qualification - making it optimal for cost-sensitive, space-constrained, and thermally constrained ESD protection tasks.
Availability
SMF30A-HM3-08 is available at Aetrix Electronics and suitable for automotive infotainment interfaces, USB 2.0 port protection, and industrial PLC digital I/O modules requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant sourcing.
Supply support for SMF30A-HM3-08 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 devices.
The SMF series targets high-reliability ESD and surge protection in automotive, industrial, and computing applications - engineered for low clamping, fast response, and AEC-Q101 compliance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMF30A-HM3-08 under maximum surge conditions?
The SMF30A-HM3-08 has a maximum reverse clamping voltage (VC) of 48.4 V at its rated peak pulse current (IPPM) of 4.1 A using a 10/1000 μs waveform. This value is measured per standard test conditions in the Vishay datasheet Rev. 2.4 and ensures protected ICs remain within safe voltage limits during transient events. The SMF30A-HM3-08 achieves this clamping performance while maintaining low dynamic resistance and minimal overshoot.
Is SMF30A-HM3-08 AEC-Q101 qualified?
Yes, SMF30A-HM3-08 is AEC-Q101 qualified per Vishay's documentation (Rev. 2.4, July 2023). It meets stress tests including human body model ESD (>8 kV), temperature cycling, and high-temperature operating life - confirming suitability for automotive applications such as body control units and infotainment systems. The "HM3" suffix denotes AEC-Q101 qualification and RoHS-compliant tin plating.
What package does SMF30A-HM3-08 use, and is it compatible with automated assembly?
SMF30A-HM3-08 uses the DO-219AB (SMF) package - a low-profile, surface-mount outline measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with wave and reflow soldering, rated for peak reflow temperatures up to 260 °C, and classified as MSL Level 1. The SMF30A-HM3-08 also matches SOD-123W footprint dimensions, enabling use with existing pick-and-place and stencil design files.
How does the capacitance of SMF30A-HM3-08 affect high-speed signal lines?
The SMF30A-HM3-08 exhibits 207 pF typical junction capacitance at 0 V and 1 MHz, which is appropriate for USB 2.0 (480 Mbps) and LVDS interfaces up to ~1.5 Gbps when properly laid out. For higher-speed protocols like USB 3.0 or MIPI D-PHY, this capacitance may cause signal attenuation or jitter; in those cases, lower-capacitance alternatives should be evaluated. The SMF30A-HM3-08's capacitance vs. voltage curve shows strong voltage dependence, dropping significantly above 5 V reverse bias.
Can SMF30A-HM3-08 be used for bidirectional protection?
No, SMF30A-HM3-08 is a unidirectional ESD protection diode, optimized for clamping positive transients on grounded-cathode configurations. It is not rated for reverse-biased conduction and lacks symmetrical clamping behavior. For bidirectional protection (e.g., USB D+/D−), two SMF30A-HM3-08 devices must be used in series-opposed configuration, or a dedicated bidirectional TVS such as SMF30AY-HM3-08 should be selected instead.
SMF30A-HM3-08 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:
- -
- Capacitance @ Frequency:
- 207pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF30A-HM3-08 FAQ
1.How can I place an order for SMF30A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF30A-HM3-08 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-HM3-08 reliable?
The price and inventory of SMF30A-HM3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF30A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF30A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF30A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF30A-HM3-08?
SMF30A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF30A-HM3-08 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-HM3-08?
For technical support, including SMF30A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF30A-HM3-08 requirements.
6.How does Aetrix verify that SMF30A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF30A-HM3-08 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-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF30A-HM3-08?
All SMF30A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF30A-HM3-08, 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-HM3-08 part is unused and in its original packaging.
Return procedure for SMF30A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF30A-HM3-08 Tags
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