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Vishay SMF8V5A-HM3_A08
- Part No.:
- SMF8V5A-HM3_A08
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V5A-HM3_A08.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,009
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Product details
Overview
SMF8V5A-HM3_A08 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 9.44 V minimum reverse breakdown voltage, 8.5 V maximum stand-off voltage, 0.1 μA maximum reverse leakage at VRWM, 13.9 A peak pulse current (10/1000 μs), and 14.4 V maximum clamping voltage at IPPM - enabling robust protection of USB 2.0, HDMI, and industrial I/O interfaces.
For engineers reviewing the SMF8V5A-HM3_A08 datasheet, SMF8V5A-HM3_A08 pinout, SMF8V5A-HM3_A08 application, or SMF8V5A-HM3_A08 equivalent, key selection criteria include clamping voltage margin relative to IC VCCIO, capacitance impact on signal integrity (<674 pF at 0 V), AEC-Q101 qualification status, SOD-123W-compatible footprint, and ±30 kV IEC 61000-4-2 ESD immunity.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transients above its breakdown threshold while maintaining low leakage below VRWM. Its low incremental surge resistance ensures minimal voltage overshoot during fast ESD events, and its "Low Noise" design delivers sub-nanosecond response time per IEC 61000-4-2 requirements.
The SMF8V5A-HM3_A08 is optimized for board-level protection of 3.3 V and 5 V digital interfaces where space-constrained layouts demand low-profile packaging. Its DO-219AB case outline supports wave and reflow soldering, with MSL level 1 rating and peak temperature tolerance up to 260 °C - aligning with IPC-J-STD-020 standards for automated assembly.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Reverse Breakdown Voltage (VBR) | 9.44–10.5 V min/max at 1 mA - defines precise clamping onset for 8.5 V nominal systems |
| Stand-off Voltage (VRWM) | 8.5 V max - ensures no conduction during normal 3.3 V or 5 V interface operation |
| Clamping Voltage (VC) | 14.4 V max at 13.9 A - limits stress on downstream ICs during 10/1000 μs surges |
| Capacitance (CD) | 674 pF typical at 0 V, 1 MHz - suitable for ≤10 Mbps signal lines; requires layout de-tuning for USB 2.0 |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds automotive and industrial immunity mandates |
| AEC-Q101 Qualified | Yes - validated for automotive under-hood and infotainment applications per H3B HBM (>8 kV) |
| Package | DO-219AB (SOD-123W compatible) - 3.9 × 1.9 × 1.08 mm, low-profile, MSL level 1 |
Pinout & Package
SMF8V5A-HM3_A08 uses the DO-219AB (SMF) package: an asymmetric surface-mount case with cathode bar marking, 3.9 mm length, 1.9 mm width, and 1.08 mm height. It is compatible with SOD-123W, SOD-123F, and SOD-123FL footprints and supports standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input side of protected line | Connected to signal trace requiring ESD protection; referenced to system ground via cathode |
| Cathode | Ground reference terminal | Must be routed to low-inductance chassis or power ground plane to minimize clamping impedance |
Key Features
| Feature | Design Value |
|---|---|
| 200 W Peak Pulse Power (10/1000 μs) | Supports repeated ESD strikes without degradation in compact PCB areas |
| ±30 kV ESD Immunity (IEC 61000-4-2) | Eliminates need for external spark gaps or multi-stage protection in consumer and automotive UI ports |
| Low Incremental Surge Resistance | Reduces clamping voltage overshoot during fast-rising transients (<1 ns rise time) |
| AEC-Q101 Qualified | Validated for automotive environments including temperature cycling, humidity bias, and mechanical shock |
| Wave & Reflow Solderable | Enables high-yield automated assembly without special thermal profiling beyond J-STD-020 Class 2 |
Applications
| USB 2.0 Interface Protection | HDMI DDC Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 data lines (D+/D−) against ESD events during hot-plug insertion in portable medical devices. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, shunting transients to ground before reaching USB transceiver. Use Value: 674 pF capacitance avoids signal distortion at 480 Mbps; 14.4 V clamping prevents damage to 3.3 V PHY inputs. | Use Scenario: Safeguarding HDMI DDC (I²C) lines from ESD in commercial displays exposed to frequent user handling. IC Role / Device Role / Timing Role: Standoff-rated protection element on 5 V DDC bus, operating below 8.5 V VRWM during normal I²C communication. Use Value: 0.1 μA leakage at VRWM preserves I²C pull-up integrity; ±30 kV rating meets IEC 61000-4-2 compliance for CE-marked equipment. |
| Industrial RS-485 Transceiver Port | Automotive Infotainment USB-C Port |
Use Scenario: Adding secondary ESD protection to RS-485 differential pairs in factory automation controllers mounted in ungrounded enclosures. IC Role / Device Role / Timing Role: Low-capacitance TVS pair (one per line) referenced to local ground, supplementing integrated transceiver protection. Use Value: 13.9 A IPPM handles induced surges from nearby relay switching; DO-219AB footprint fits tight 2.54 mm header spacing. | Use Scenario: Front-end ESD protection for USB-C CC and SBU lines in automotive head units subject to glove-box insertion cycles. IC Role / Device Role / Timing Role: AEC-Q101-qualified unidirectional diode on 5 V-rated control lines, with cathode tied to chassis ground. Use Value: H3B-class HBM >8 kV and ±30 kV air discharge meet ISO 10605 requirements; 175 °C TJ rating supports under-dash thermal environments. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.5A-E3/5A | Higher clamping voltage (15.0 V), larger SMA (DO-214AC) package (4.5 × 2.7 mm), 600 pF capacitance | Better suited for lower-speed, higher-power industrial power rails; not optimal for high-density USB layouts | Select when board space allows larger footprint and higher VC is acceptable for 5 V systems |
| TPD2E001DRYR | Bi-directional dual-channel array, 12 pF typical capacitance, 5.5 V VRWM, not AEC-Q101 qualified | Targeted at ultra-high-speed USB 2.0 or MIPI lanes where <15 pF is mandatory; lacks automotive qualification | Choose only for non-automotive, high-frequency signal lines requiring sub-20 pF loading |
Compared with SMAJ8.5A-E3/5A and TPD2E001DRYR, the SMF8V5A-HM3_A08 uniquely balances AEC-Q101 qualification, 674 pF capacitance, and DO-219AB miniaturization - making it the preferred choice for space-constrained automotive and industrial USB/HDMI protection where moderate bandwidth and automotive reliability are jointly required.
Availability
SMF8V5A-HM3_A08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI DDC line safeguarding, and industrial RS-485 port hardening requiring stable component supply across automotive, medical, and factory automation programs.
Supply support for SMF8V5A-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 Semiconductors is a global leader in discrete semiconductors, specializing in power management, sensing, and circuit protection components with emphasis on reliability and AEC-Q qualification.
The SMF series targets board-level ESD protection for high-speed digital interfaces, designed specifically to meet stringent automotive, industrial, and consumer immunity standards while minimizing PCB area and assembly complexity.
FAQ
What is the maximum clamping voltage of the SMF8V5A-HM3_A08 under specified test conditions?
The SMF8V5A-HM3_A08 has a maximum clamping voltage (VC) of 14.4 V when subjected to its rated peak pulse current of 13.9 A using a 10/1000 μs waveform. This value is measured per IEC 61000-4-5 and ensures downstream ICs operating at 3.3 V or 5 V remain within safe overvoltage margins. The SMF8V5A-HM3_A08 achieves this with low incremental surge resistance, critical for fast transient suppression.
Is the SMF8V5A-HM3_A08 qualified to AEC-Q101, and what does that qualification cover?
Yes, the SMF8V5A-HM3_A08 is AEC-Q101 qualified, covering stress tests including human body model (HBM) >8 kV (Class H3B), temperature cycling, high-temperature operating life, and unbiased highly accelerated stress testing. This validation confirms suitability for automotive applications such as infotainment, ADAS sensor interfaces, and body control modules. The SMF8V5A-HM3_A08's 175 °C junction temperature rating further supports under-hood deployment.
How does the capacitance of the SMF8V5A-HM3_A08 affect high-speed signal integrity?
The SMF8V5A-HM3_A08 exhibits 674 pF typical capacitance at 0 V and 1 MHz, which limits its use to interfaces operating ≤10 Mbps - such as USB 2.0 full-speed (12 Mbps) with careful layout de-tuning, or HDMI DDC (100 kHz). For higher-speed links like USB 2.0 high-speed (480 Mbps), this capacitance introduces measurable rise-time degradation; the SMF8V5A-HM3_A08 remains viable only when paired with series impedance matching or used on non-critical control lines.
What package type does the SMF8V5A-HM3_A08 use, and is it compatible with standard SOD-123 footprints?
The SMF8V5A-HM3_A08 uses the DO-219AB (SMF) package: 3.9 mm × 1.9 mm × 1.08 mm, with cathode bar marking and MSL level 1 rating. It is explicitly stated as compatible with SOD-123W, SOD-123F, and SOD-123FL outlines. While pad dimensions differ slightly, the SMF8V5A-HM3_A08 can be mounted on modified SOD-123 land patterns with adjusted solder mask and copper pour to accommodate its wider body and asymmetric leadframe.
Can the SMF8V5A-HM3_A08 be used in bidirectional signal paths like RS-485 or CAN?
No - the SMF8V5A-HM3_A08 is a unidirectional TVS diode, intended for protecting signals referenced to ground (e.g., USB D+, HDMI DDC clock/data). For bidirectional differential buses like RS-485 or CAN, a symmetric or bi-directional TVS (e.g., SMAJ8.5CA or SP1003) is required to clamp both positive and negative transients. Using the SMF8V5A-HM3_A08 on such lines would leave negative excursions unprotected and risk device failure.
SMF8V5A-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):
- 8.5V
- Voltage - Breakdown (Min):
- 9.44V
- Voltage - Clamping (Max) @ Ipp:
- 14.4V
- Current - Peak Pulse (10/1000µs):
- 13.9A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 674pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V5A-HM3_A08 FAQ
1.How can I place an order for SMF8V5A-HM3_A08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V5A-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 SMF8V5A-HM3_A08 reliable?
The price and inventory of SMF8V5A-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 SMF8V5A-HM3_A08 is usually 5 days.
3.What payment methods are accepted for SMF8V5A-HM3_A08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V5A-HM3_A08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V5A-HM3_A08?
SMF8V5A-HM3_A08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V5A-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 SMF8V5A-HM3_A08?
For technical support, including SMF8V5A-HM3_A08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V5A-HM3_A08 requirements.
6.How does Aetrix verify that SMF8V5A-HM3_A08 is sourced from the original manufacturer or authorized distributors?
All SMF8V5A-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 SMF8V5A-HM3_A08 meets industry standards.
7.What is the process for return or replacement of SMF8V5A-HM3_A08?
All SMF8V5A-HM3_A08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V5A-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 SMF8V5A-HM3_A08 part is unused and in its original packaging.
Return procedure for SMF8V5A-HM3_A08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V5A-HM3_A08 Tags
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