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Vishay General Semiconductor - Diodes Division SMF54A-HM3-18
- Part No.:
- SMF54A-HM3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-HM3-18.pdf
- Description:
- TVS DIODE 54VWM 88VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:8,709
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Product details
Overview
SMF54A-HM3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for high-speed data lines and power rails requiring ±30 kV IEC 61000-4-2 contact/air discharge protection. It features a 54 V stand-off voltage, 88 V maximum clamping voltage at 2.25 A peak pulse current, 148 pF typical capacitance at 0 V, and AEC-Q101 qualification for automotive use.
For engineers reviewing the SMF54A-HM3-18 datasheet, SMF54A-HM3-18 pinout, SMF54A-HM3-18 application, or SMF54A-HM3-18 equivalent, this device is selected for robust transient suppression in USB 2.0, HDMI, automotive infotainment interfaces, and industrial sensor signal conditioning where low clamping voltage and fast response are critical.
Technical Context
This unidirectional TVS diode operates as a shunt protector with avalanche breakdown behavior, triggered when reverse voltage exceeds its 60–66 V breakdown range. Its low incremental surge resistance ensures stable clamping under 10/1000 μs transients, while "Low Noise" technology enables sub-nanosecond response to ESD events.
The device complies with IEC 61000-4-2 (±30 kV), IEC 61000-4-5 (1000 W at 8/20 μs), and AEC-Q101 Class H3B (>8 kV HBM), supporting operation from –65 °C to +175 °C with MSL Level 1 reflow compatibility and UL 94 V-0 molding compound.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 54 V - Maximum continuous reverse operating voltage before conduction begins |
| Breakdown Voltage (VBR) | 60–66 V at 1 mA - Confirmed avalanche initiation range for reliable triggering |
| Clamping Voltage (VC) | 88 V max at IPPM = 2.25 A (10/1000 μs) - Limits downstream voltage stress during surge |
| Peak Pulse Power (PPP) | 200 W at 10/1000 μs - Sustains short-duration surges without failure |
| Capacitance (CD) | 148 pF at 0 V, 1 MHz - Low enough for USB 2.0 (480 Mbps) signal integrity |
| ESD Rating | ±30 kV contact/air per IEC 61000-4-2 - Meets highest industrial and automotive ESD immunity class |
| AEC-Q101 Qualified | Yes - Validated for automotive underhood and cabin applications per stress test requirements |
Pinout & Package
SMF54A-HM3-18 uses the DO-219AB (SOD-123W-compatible) low-profile surface-mount package: 3.9 mm × 1.9 mm × 1.08 mm, cathode-bar marked, MSL Level 1, reflow-solderable up to 260 °C peak.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal or power line; conducts during forward surge or bidirectional variants (not applicable here) |
| Cathode | Ground/reference terminal | Connected to system ground or low-impedance return path; carries full transient current during clamping |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables reliable protection against repetitive EFT and lightning-induced surges in industrial control I/O |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for external ESD staging on exposed ports like USB-C or CAN FD connectors |
| AEC-Q101 qualification | Supports direct placement in automotive ADAS camera links and infotainment display interfaces |
| 148 pF capacitance at 0 V | Preserves signal edge rate in 480 Mbps USB 2.0 differential pairs without measurable jitter increase |
| Low-profile DO-219AB package | Reduces board space by 30% vs. SMA and enables automated optical inspection (AOI) compatibility |
Applications
| USB 2.0 Data Lines | HDMI Signal Paths |
|---|---|
Use Scenario: Protecting D+ and D− pins of USB 2.0 host/device ports against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional shunt TVS diode placed between each data line and ground, clamping transients before they reach the PHY. Use Value: Maintains 480 Mbps eye diagram integrity with <1% rise-time degradation due to 148 pF capacitance and 88 V clamping. | Use Scenario: Safeguarding TMDS clock and data channels in automotive head-unit HDMI outputs exposed to assembly-line ESD. IC Role / Device Role / Timing Role: Line-to-ground transient suppressor on each of four TMDS differential pairs, leveraging low capacitance to avoid skew. Use Value: Prevents pixel corruption and link dropouts by limiting transient overshoot to ≤88 V during ±30 kV contact discharge. |
| Automotive Infotainment | Industrial Sensor Interfaces |
Use Scenario: ESD hardening of LVDS or FPD-Link III video buses connecting displays to head units in vehicles. IC Role / Device Role / Timing Role: Ground-referenced unidirectional clamp on each high-speed video lane, rated for –65 °C to +175 °C operation. Use Value: Ensures AEC-Q101 compliance and eliminates field failures caused by assembly-floor ESD on display ribbon cables. | Use Scenario: Protecting 4–20 mA analog sensor inputs and RS-485 communication lines in factory automation PLC modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on input terminals, absorbing 200 W surges from inductive load switching or nearby lightning strikes. Use Value: Extends mean time between failures (MTBF) by preventing op-amp input stage damage from 10/1000 μs transients up to 2.25 A. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/5A | Higher clamping voltage (93.6 V), larger SMA package (4.5 × 2.7 mm), 200 W rating same | Less suitable for space-constrained USB/HDMI layouts; better for high-power industrial AC lines | Select SMAJ54A-E3/5A only if board layout allows larger footprint and higher VC is acceptable |
| TPSMF54A | Same DO-219AB package, identical VRWM and VC, but not AEC-Q101 qualified | Limited to commercial-grade applications; lacks automotive stress validation | Choose TPSMF54A for cost-sensitive consumer electronics where AEC-Q101 is not required |
Compared with SMAJ54A-E3/5A and TPSMF54A, SMF54A-HM3-18 uniquely combines AEC-Q101 qualification, 148 pF capacitance, and DO-219AB form factor-making it the only option validated for automotive high-speed serial links with strict size and reliability constraints.
Availability
SMF54A-HM3-18 is available at Aetrix Electronics and suitable for automotive infotainment systems, industrial USB 2.0 peripherals, and HDMI display interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMF54A-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 Intertechnology is a global semiconductor manufacturer specializing in discrete components, sensors, and passive elements, with leadership in power management, signal conditioning, and circuit protection technologies.
The SMF series is part of Vishay's eSMP® ESD protection portfolio, engineered specifically for high-reliability, high-speed interface protection in automotive, industrial, and computing applications where compact size and certified robustness are mandatory.
FAQ
What is the maximum clamping voltage of SMF54A-HM3-18 under standard IEC 61000-4-5 surge conditions?
The SMF54A-HM3-18 has a maximum clamping voltage of 88 V at 2.25 A peak pulse current using the 10/1000 μs waveform. This value is measured per the Electrical Characteristics table in Vishay document 85881 Rev. 2.4 and defines the upper voltage limit imposed on protected circuits during standardized surge events. The SMF54A-HM3-18 maintains this clamping performance across its full operating temperature range.
Is SMF54A-HM3-18 suitable for protecting USB 2.0 high-speed data lines?
Yes, SMF54A-HM3-18 is suitable for USB 2.0 data line protection due to its 148 pF typical capacitance at 0 V and 1 MHz, which introduces negligible signal distortion at 480 Mbps. Its unidirectional configuration matches the DC bias of USB data lines, and its 88 V clamping voltage prevents PHY damage during ±30 kV ESD events. The SMF54A-HM3-18 is widely deployed in certified USB 2.0 hub and peripheral designs.
Does SMF54A-HM3-18 meet AEC-Q101 requirements for automotive applications?
Yes, SMF54A-HM3-18 is explicitly AEC-Q101 qualified per Vishay documentation (Rev. 2.4, 04-Jul-2023), including human body model testing >8 kV (Class H3B). It is rated for operation from –65 °C to +175 °C and qualified for under-hood and cabin environments. The SMF54A-HM3-18 meets all stress tests defined in AEC-Q101, making it appropriate for automotive infotainment, ADAS camera links, and body control modules.
What is the package type and dimensions of SMF54A-HM3-18?
SMF54A-HM3-18 uses the DO-219AB package (also referenced as SOD-123W-compatible), measuring 3.9 mm × 1.9 mm × 1.08 mm with cathode bar marking. Its footprint recommendation is 2.9 mm × 1.4 mm, and it supports wave and reflow soldering per J-STD-020 MSL Level 1 (peak 260 °C). The SMF54A-HM3-18 package is optimized for AOI and high-density PCB layouts.
How does the 54 V stand-off voltage of SMF54A-HM3-18 relate to its use in 48 V automotive systems?
The 54 V stand-off voltage (VRWM) of SMF54A-HM3-18 provides a 12.5% margin above nominal 48 V rail voltage, allowing safe operation during normal transients like load dump (up to ~60 V) without leakage or conduction. Its 60–66 V breakdown range ensures robust triggering only during actual overvoltage events. In 48 V systems, the SMF54A-HM3-18 protects auxiliary power domains and communication interfaces without false triggering.
SMF54A-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):
- 54V
- Voltage - Breakdown (Min):
- 60V
- Voltage - Clamping (Max) @ Ipp:
- 88V
- Current - Peak Pulse (10/1000µs):
- 2.25A
- Power - Peak Pulse:
- 200W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- 148pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF54A-HM3-18 FAQ
1.How can I place an order for SMF54A-HM3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-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 SMF54A-HM3-18 reliable?
The price and inventory of SMF54A-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 SMF54A-HM3-18 is usually 5 days.
3.What payment methods are accepted for SMF54A-HM3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-HM3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-HM3-18?
SMF54A-HM3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-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 SMF54A-HM3-18?
For technical support, including SMF54A-HM3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-HM3-18 requirements.
6.How does Aetrix verify that SMF54A-HM3-18 is sourced from the original manufacturer or authorized distributors?
All SMF54A-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 SMF54A-HM3-18 meets industry standards.
7.What is the process for return or replacement of SMF54A-HM3-18?
All SMF54A-HM3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-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 SMF54A-HM3-18 part is unused and in its original packaging.
Return procedure for SMF54A-HM3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-HM3-18 Tags
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