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Vishay General Semiconductor - Diodes Division SMF30A-HM3-18
- Part No.:
- SMF30A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF30A-HM3-18.pdf
- Description:
- TVS DIODE 30VWM 48.4VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:5,243
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Product details
Overview
SMF30A-HM3-18 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-reliability signal lines. It features a 30 V stand-off voltage (VRWM), 33.3 V minimum reverse breakdown voltage (VBR), 4.1 A peak pulse current (IPPM) under 10/1000 μs waveform, and clamps to ≤48.4 V at rated surge. It is widely deployed in automotive infotainment data lines requiring AEC-Q101 qualification and ±30 kV IEC 61000-4-2 ESD immunity.
For engineers reviewing the SMF30A-HM3-18 datasheet, SMF30A-HM3-18 pinout, SMF30A-HM3-18 application, or SMF30A-HM3-18 equivalent, key selection criteria include its 1.08 mm height low-profile SOD-123W-compatible footprint, 200 W peak pulse power rating, 207 pF typical capacitance at 0 V, and verified AEC-Q101 qualification for automotive-grade deployment.
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown clamping action. Its junction temperature range spans −65 °C to +175 °C, and thermal resistance (RthJA) is 180 K/W when mounted on a 3 mm × 3 mm Cu pad epoxy-glass PCB - enabling reliable operation in under-hood automotive environments.
The SMF30A-HM3-18 uses "Low Noise" technology for sub-nanosecond response time and exhibits low incremental surge resistance, ensuring tight clamping performance during fast transients. Its 0.1 μA maximum reverse leakage at VRWM supports low-power interface protection without signal integrity degradation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 30 V - maximum continuous reverse operating voltage before clamping begins; defines safe signal swing margin for protected lines. |
| Reverse Breakdown (VBR) | 33.3–36.9 V at 1 mA - precise avalanche onset ensures predictable turn-on during ESD events. |
| Peak Pulse Current (IPPM) | 4.1 A (10/1000 μs) - quantifies surge-handling capability for IEC 61000-4-5 compliance testing. |
| Clamping Voltage (VC) | ≤48.4 V at IPPM - limits downstream IC stress during worst-case transient; critical for 3.3 V/5 V logic protection. |
| Capacitance (CD) | 207 pF at 0 V, 1 MHz - impacts high-speed signal integrity; suitable for USB 2.0, CAN, LIN, and sensor interfaces. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds industrial and automotive ESD immunity requirements. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including HBM >8 kV; supports PPAP and long-term reliability validation. |
Pinout & Package
SMF30A-HM3-18 is housed in the DO-219AB (SMF) package - a low-profile, surface-mount case compatible with SOD-123W, SOD-123F, and SOD-123FL footprints. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H). Cathode is marked by a bar on the top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected signal line; conducts during reverse-transient overvoltage to shunt energy to ground. |
| Cathode | Ground reference | Connected to system ground plane; establishes clamping reference and enables unidirectional protection path. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Enables sustained suppression of repetitive surges in automotive and industrial control bus lines. |
| Low Profile (1.08 mm height) | Supports ultra-thin PCB designs and automated optical inspection (AOI) compatibility in dense layouts. |
| Wave & Reflow Solderable | Qualified for standard Pb-free reflow profiles up to 260 °C peak, eliminating hand-soldering dependency. |
| "Low Noise" Fast Response | Sub-nanosecond switching minimizes voltage overshoot during ESD events, preserving signal fidelity. |
| MSL Level 1 (J-STD-020) | Zero bake requirement before assembly - reduces manufacturing overhead and moisture-related defects. |
Applications
| Automotive Infotainment Data Lines | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting USB 2.0, I²C, and LIN bus traces in head units and display modules exposed to ESD during service or assembly. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between signal line and chassis ground to suppress ±30 kV contact discharge. Use Value: Prevents latch-up or damage to MCU GPIOs and transceivers while maintaining <210 pF loading for full-speed USB timing compliance. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Standoff-mode protector on 0–5 V or 4–20 mA signal paths, limiting transients to <49 V during surge events. Use Value: Ensures signal accuracy remains unaffected by leakage (<0.1 μA at 30 V) and avoids false triggering in precision measurement circuits. |
| Automotive Body Control Modules | Consumer Electronics Button/Keypad ESD Guard |
Use Scenario: Shielding wake-up inputs, door lock actuators, and lighting control signals from cable-borne transients in 12 V systems. IC Role / Device Role / Timing Role: Primary transient suppressor on low-voltage digital control lines interfacing with microcontrollers and drivers. Use Value: Delivers AEC-Q101-qualified reliability and 175 °C junction rating for under-dash mounting without derating. |
Use Scenario: ESD hardening of tactile switches and capacitive touch pads in smart home devices and wearables. IC Role / Device Role / Timing Role: Low-capacitance shunt element across switch contacts to absorb human-body-model discharges. Use Value: Maintains tactile responsiveness with minimal parasitic loading (207 pF) and eliminates false actuation caused by ESD-induced glitches. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ30A-E3/57T | Higher clamping voltage (53.3 V), larger SMA package (4.5 mm × 2.7 mm), 400 W peak power (8/20 μs). | Better suited for higher-energy surges but incompatible with space-constrained DO-219AB layouts. | Select when surge energy exceeds 200 W and board area allows SMA footprint. |
| TPD2E001DRYR | Bi-directional, dual-channel, 12 pF capacitance, 5 V VRWM - optimized for high-speed data lines like USB 2.0. | Designed for differential signaling; not rated for AEC-Q101 or automotive temperature range. | Prefer for consumer USB ports where ultra-low capacitance is mandatory and automotive qualification is unnecessary. |
Compared with SMAJ30A-E3/57T and TPD2E001DRYR, the SMF30A-HM3-18 uniquely balances AEC-Q101 qualification, compact DO-219AB packaging, and 30 V standoff for automotive signal-line protection - making it the optimal choice where space, reliability, and standardized qualification are jointly required.
Availability
SMF30A-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial sensor interfaces, and body control modules requiring stable component supply and long-term lifecycle support.
Supply support for SMF30A-HM3-18 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 protection, power, and sensing solutions for automotive, industrial, and computing markets.
The SMF series targets high-volume automotive and industrial ESD protection needs, delivering AEC-Q101-qualified, low-profile TVS diodes optimized for signal integrity, manufacturability, and under-hood thermal resilience.
FAQ
What is the maximum clamping voltage of the SMF30A-HM3-18 under rated surge conditions?
The SMF30A-HM3-18 has a maximum reverse clamping voltage (VC) of 48.4 V when subjected to its rated peak pulse current of 4.1 A (10/1000 μs waveform). This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs remain within safe operating voltage limits during transient events.
Is the SMF30A-HM3-18 qualified to AEC-Q101 standards?
Yes, the SMF30A-HM3-18 is AEC-Q101 qualified, meeting rigorous stress tests for automotive-grade reliability including human body model (HBM) ESD >8 kV. This qualification is explicitly confirmed in Vishay's official documentation for the SMF5V0A–SMF58A family, and applies to all variants including SMF30A-HM3-18.
What package type does the SMF30A-HM3-18 use, and is it compatible with automated assembly?
The SMF30A-HM3-18 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 wave and reflow solderable, qualified for Pb-free reflow up to 260 °C, and carries MSL Level 1 rating per J-STD-020, enabling seamless integration into high-volume SMT lines without baking.
How does the capacitance of the SMF30A-HM3-18 affect high-speed signal lines?
The SMF30A-HM3-18 exhibits 207 pF typical capacitance at 0 V and 1 MHz, which is appropriate for medium-speed interfaces such as LIN, CAN FD (low-rate segments), and analog sensor outputs. For USB 2.0 or high-speed I²C, this capacitance may require layout mitigation - but remains acceptable for most automotive body-control and infotainment signal lines where bandwidth is below 20 MHz.
What is the operating temperature range for the SMF30A-HM3-18?
The SMF30A-HM3-18 supports an operating temperature range of −65 °C to +175 °C, matching the full junction temperature (TJ) specification. This wide range enables direct placement in under-hood automotive environments and industrial enclosures subject to extreme thermal cycling, without derating or additional thermal management.
SMF30A-HM3-18 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-HM3-18 FAQ
1.How can I place an order for SMF30A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF30A-HM3-18 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-HM3-18 reliable?
The price and inventory of SMF30A-HM3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF30A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF30A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF30A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF30A-HM3-18?
SMF30A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF30A-HM3-18 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-HM3-18?
For technical support, including SMF30A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF30A-HM3-18 requirements.
6.How does Aetrix verify that SMF30A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF30A-HM3-18 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-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF30A-HM3-18?
All SMF30A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF30A-HM3-18, 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-HM3-18 part is unused and in its original packaging.
Return procedure for SMF30A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF30A-HM3-18 Tags
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Diodes Incorporated
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