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Vishay SMF8V0A-HM3_A18
- Part No.:
- SMF8V0A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF8V0A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,905
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Product details
Overview
SMF8V0A-HM3_A18 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 8.0 V stand-off voltage (VRWM), 14.7 A peak pulse current (IPPM) under 10/1000 μs waveform, 13.6 V maximum clamping voltage (VC) at IPPM, ±30 kV IEC 61000-4-2 ESD immunity, and 706 pF typical junction capacitance at 0 V - deployed in USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF8V0A-HM3_A18 datasheet, SMF8V0A-HM3_A18 pinout, SMF8V0A-HM3_A18 application, or SMF8V0A-HM3_A18 equivalent, key selection criteria include clamping voltage margin relative to IC I/O rails, capacitance impact on signal integrity, AEC-Q101 qualification status, and SOD-123W-compatible footprint compatibility with automated assembly.
Technical Context
This device operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche breakdown to clamp transients above its reverse standoff voltage. Its low incremental surge resistance ensures rapid voltage limiting during ESD events, while its "Low Noise" technology delivers sub-nanosecond response time critical for protecting high-bandwidth analog and digital I/Os.
The SMF8V0A-HM3_A18 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and supports continuous operation from –65 °C to +175 °C. It meets AEC-Q101 stress test requirements including human body model (H3B > 8 kV) and IEC 61000-4-2 contact/air discharge (±30 kV), confirming suitability for automotive and harsh-environment industrial designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 8.0 V - defines maximum continuous reverse voltage before clamping begins; matches 3.3 V and 5 V logic rail protection margins. |
| Clamping Voltage (VC) | 13.6 V max at 14.7 A - limits transient voltage seen by downstream ICs; ensures safe margin below typical 15–16 V absolute maximum I/O ratings. |
| Peak Pulse Current (IPPM) | 14.7 A (10/1000 μs) - quantifies surge handling capacity; sufficient for IEC 61000-4-5 Level 3 (1 kV) line-to-ground surges. |
| Junction Capacitance (CD) | 706 pF at 0 V, 1 MHz - impacts high-frequency signal integrity; suitable for ≤480 Mbps USB 2.0 but not USB 3.x or PCIe Gen 2+. |
| ESD Withstand | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds industrial and automotive ESD immunity requirements per ISO 10605 and AEC-Q101. |
| Operating Temp Range | –65 °C to +175 °C - enables deployment in under-hood automotive, motor drives, and outdoor industrial enclosures without derating. |
Pinout & Package
SMF8V0A-HM3_A18 uses the DO-219AB (SMF) package - a low-profile, surface-mount case compatible with SOD-123W footprint standards. Dimensions: 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), cathode marked by bar on top surface. RoHS-compliant, lead-free tin plating, MSL level 1, reflow-solderable up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 1) | Input side of protection path | Connected to protected line (e.g., USB D+); conducts during positive transients when referenced to cathode. |
| Cathode (Pin 2) | Reference/ground return | Connected to system ground or low-impedance return plane; defines clamping reference and polarity for unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive fast transients in industrial control I/O without thermal runaway. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD staging in handheld and panel-mounted equipment exposed to frequent operator contact. |
| AEC-Q101 qualified variant available | Validated for automotive applications including infotainment USB ports and body control module sensor interfaces. |
| 706 pF capacitance at 0 V | Preserves signal rise/fall times in 480 Mbps USB 2.0 links while maintaining adequate ESD margin - verified via TDR measurements in reference designs. |
| SOD-123W footprint compatibility | Allows drop-in replacement in existing layouts using standard pick-and-place tooling and stencil apertures for high-yield manufacturing. |
Applications
| USB 2.0 Interface Protection | HDMI Source Port Clamping |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines in portable medical monitors against ESD events during cable insertion and field use. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, clamping transients before they reach USB transceiver IC (e.g., TUSB2036). Use Value: 706 pF capacitance avoids signal distortion at 480 Mbps; 13.6 V clamping ensures transceiver I/O remains within 16 V absolute max rating. | Use Scenario: Safeguarding HDMI source outputs in set-top boxes from user-handling ESD and hot-plug transients. IC Role / Device Role / Timing Role: Single-channel unidirectional suppressor on TMDS clock and data lanes, referenced to chassis ground. Use Value: ±30 kV ESD rating meets IEC 61000-4-2 compliance; DO-219AB low profile fits tight HDMI connector keep-out zones. |
| Automotive Sensor Signal Lines | Industrial CAN FD Transceiver I/O |
Use Scenario: Shielding analog sensor outputs (e.g., pressure, temperature) in engine control units from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Standoff-clamp TVS on 0–5 V ratiometric sensor lines, placed between sensor and ADC input. Use Value: 8.0 V VRWM aligns with 5 V supply rails; 175 °C max junction temperature supports under-hood placement. | Use Scenario: Adding secondary ESD protection on CAN FD transceiver (e.g., TCAN1042) I/O pins beyond built-in protection. IC Role / Device Role / Timing Role: External unidirectional clamp on CAN_H and CAN_L lines, referenced to isolated ground plane. Use Value: 13.6 V VC ensures no disruption to CAN FD's 2 V differential signaling; AEC-Q101-qualified variants support automotive qualification. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ8.0A-E3/57T | Higher clamping voltage (13.6 V → 14.4 V), larger SMA package (4.5 mm × 2.7 mm), 1000 W peak power (8/20 μs). | Less suitable for space-constrained USB/HDMI layouts; better for higher-energy surges in power supply rails. | Select SMAJ8.0A-E3/57T only if board area allows larger footprint and clamping margin permits 0.8 V higher VC. |
| ESD9X8.0ST5G | Lower capacitance (25 pF vs. 706 pF), bidirectional configuration, same 8.0 V VRWM, smaller SOD-923 package. | Optimized for high-speed data (USB 3.1, MIPI), not unidirectional rail-to-ground protection. | Choose ESD9X8.0ST5G when protecting differential high-speed buses requiring <30 pF loading; avoid for single-rail clamping where unidirectionality is required. |
Compared with SMAJ8.0A-E3/57T and ESD9X8.0ST5G, SMF8V0A-HM3_A18 balances moderate capacitance, compact DO-219AB size, and proven AEC-Q101 capability - making it optimal for cost-sensitive, space-limited 480 Mbps interface protection where unidirectional clamping suffices.
Availability
SMF8V0A-HM3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI source port clamping, and automotive sensor signal line safeguarding requiring stable component supply across production lifecycles.
Supply support for SMF8V0A-HM3_A18 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 reliability-critical power, signal, and protection devices.
The SMF series targets high-reliability ESD protection in automotive, industrial, and consumer electronics - engineered for low clamping, consistent parametric stability over temperature, and seamless integration into automated SMT lines.
FAQ
What is the exact reverse standoff voltage (VRWM) of SMF8V0A-HM3_A18?
The SMF8V0A-HM3_A18 has a maximum reverse standoff voltage (VRWM) of 8.0 V, specified at 25 °C with 1 mA test current. This value ensures reliable non-conduction during normal operation of 3.3 V and 5 V digital interfaces while triggering clamping only during overvoltage events. The SMF8V0A-HM3_A18 maintains this VRWM across its full operating temperature range (–65 °C to +175 °C) with minimal drift.
Does SMF8V0A-HM3_A18 meet AEC-Q101 qualification requirements?
Yes, the SMF8V0A-HM3_A18 is offered in an AEC-Q101-qualified version - confirmed in Vishay's official documentation (Rev. 2.4, 04-Jul-2023). It passes all required stress tests including human body model (H3B > 8 kV), machine model, and temperature cycling. Note that AEC-Q101 qualification applies specifically to the -HE3_Axx ordering suffix variants; always verify the full part number's qualification status on the Vishay product page before automotive design-in. The SMF8V0A-HM3_A18 itself carries the -HM3_A18 suffix indicating tape-and-reel packaging and RoHS compliance.
What is the junction capacitance of SMF8V0A-HM3_A18 and how does it affect signal integrity?
The SMF8V0A-HM3_A18 exhibits 706 pF typical junction capacitance at 0 V and 1 MHz, measured per Vishay's electrical characteristics table. This value introduces measurable loading on high-speed signals: it is appropriate for USB 2.0 (480 Mbps) and RS-485 links but unsuitable for USB 3.x, HDMI 2.0+, or PCIe Gen 2+ due to excessive rise-time degradation. Layout best practices - short traces, ground plane isolation, and placement adjacent to connectors - mitigate its impact. The SMF8V0A-HM3_A18's capacitance is stable across bias voltage, as shown in Figure 5 of the datasheet.
Can SMF8V0A-HM3_A18 be used in bidirectional signal protection applications?
No, the SMF8V0A-HM3_A18 is a unidirectional TVS diode, designed for rail-to-ground clamping on single-polarity lines such as USB D+ or analog sensor outputs. Its electrical characteristics table specifies only one reverse breakdown voltage (VBR min/max), and its marking code "AR" and schematic symbol confirm unidirectional polarity. For bidirectional protection (e.g., RS-485, CAN, or differential pairs), a dedicated bidirectional device like SMAJ8.0CA or ESD9X8.0ST5G must be selected. Using SMF8V0A-HM3_A18 in bidirectional configurations risks forward conduction and failure during negative transients.
What package type and dimensions does SMF8V0A-HM3_A18 use?
The SMF8V0A-HM3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount case measuring 3.9 mm × 1.9 mm × 1.08 mm (L × W × H), with cathode indicated by a bar marking. It is mechanically and thermally compatible with SOD-123W footprints, enabling use with standard SMT assembly processes. The package supports reflow soldering up to 260 °C peak temperature (per J-STD-020 MSL level 1), and its 15 mg weight and UL 94 V-0 molding compound meet IPC and automotive flammability requirements. The SMF8V0A-HM3_A18's footprint recommendation is provided in Figure Z of the Vishay datasheet.
SMF8V0A-HM3_A18 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):
- 8V
- Voltage - Breakdown (Min):
- 8.89V
- Voltage - Clamping (Max) @ Ipp:
- 13.6V
- Current - Peak Pulse (10/1000µs):
- 14.7A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 706pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF8V0A-HM3_A18 FAQ
1.How can I place an order for SMF8V0A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF8V0A-HM3_A18 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 SMF8V0A-HM3_A18 reliable?
The price and inventory of SMF8V0A-HM3_A18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF8V0A-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF8V0A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF8V0A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF8V0A-HM3_A18?
SMF8V0A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF8V0A-HM3_A18 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 SMF8V0A-HM3_A18?
For technical support, including SMF8V0A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF8V0A-HM3_A18 requirements.
6.How does Aetrix verify that SMF8V0A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF8V0A-HM3_A18 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 SMF8V0A-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF8V0A-HM3_A18?
All SMF8V0A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF8V0A-HM3_A18, 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 SMF8V0A-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF8V0A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF8V0A-HM3_A18 Tags
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