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Vishay General Semiconductor - Diodes Division SMF54A-HM3-08
- Part No.:
- SMF54A-HM3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-HM3-08.pdf
- Description:
- TVS DIODE 54VWM 88VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:2,517
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Product details
Overview
SMF54A-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. It features a 54 V stand-off voltage (VRWM), 60–66 V reverse breakdown (VBR), 88 V maximum clamping voltage at 2.25 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 148 pF typical capacitance at 1 MHz - optimized for USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF54A-HM3-08 datasheet, SMF54A-HM3-08 pinout, SMF54A-HM3-08 application, or SMF54A-HM3-08 equivalent, this device is selected for robust electrostatic discharge protection in space-constrained, high-reliability PCB layouts where low clamping voltage, fast response time, and AEC-Q101 qualification are critical design requirements.
Technical Context
The SMF54A-HM3-08 operates as a single-channel unidirectional TVS diode with cathode-anode polarity, leveraging silicon avalanche technology to clamp transients within nanoseconds. Its low incremental surge resistance ensures minimal voltage overshoot during 10/1000 μs surges up to 200 W peak power.
It complies with IEC 61000-4-2 (±30 kV contact/air), AEC-Q101 Class H3B (>8 kV HBM), and supports reflow/wave soldering per J-STD-020 MSL Level 1. The DO-219AB package enables 1.9 mm width footprint compatibility with SOD-123W/F/FL footprints while maintaining thermal resistance of 180 K/W on standard epoxy-glass PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 54 V - maximum continuous reverse operating voltage before leakage exceeds 0.1 µA; defines safe signal swing range for protected line. |
| Reverse Breakdown (VBR) | 60–66 V at 1 mA - guaranteed conduction onset under transient stress; tight tolerance enables predictable clamping margin. |
| Clamping Voltage (VC) | 88 V at IPPM = 2.25 A (10/1000 µs) - limits downstream IC voltage exposure during surge events. |
| Capacitance (CD) | 148 pF at VR = 0 V, f = 1 MHz - low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity without excessive rise-time degradation. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds automotive and industrial ESD immunity requirements without external shielding. |
| Peak Pulse Power | 200 W (10/1000 µs), 1000 W (8/20 µs IEC 61000-4-5) - handles both system-level ESD and lightning-induced surges in industrial interfaces. |
| Operating Temp Range | −65 °C to +175 °C - supports under-hood automotive, industrial control, and outdoor equipment deployments. |
Pinout & Package
SMF54A-HM3-08 uses the DO-219AB (SMF) package: low-profile (1.08 mm max height), 3.9 mm × 1.9 mm outline, molded UL 94 V-0 compound, MSL Level 1, compatible with SOD-123W/F/FL footprints. Cathode marked by bar on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected signal line; conducts surge current toward ground when cathode is held at reference potential. |
| Cathode | Ground-reference terminal | Must be tied to low-impedance system ground; determines unidirectional clamping direction and sets VRWM threshold. |
Key Features
| Feature | Design Value |
|---|---|
| "Low Noise" fast-response technology | Sub-nanosecond response enables clamping before sensitive ICs experience overvoltage - critical for high-speed serial links. |
| AEC-Q101 qualified | Validated for automotive applications including infotainment, ADAS sensors, and body electronics requiring H3B-class ESD robustness. |
| Wave and reflow solderable | Compatible with standard SMT processes up to 260 °C peak temperature; eliminates hand-soldering risk in production. |
| Low incremental surge resistance | Minimizes dynamic voltage overshoot during fast transients - improves clamping efficiency versus higher-Rsurge alternatives. |
| Single-channel unidirectional protection | Optimized for DC-biased or ground-referenced lines (e.g., USB D+, CAN_H); avoids capacitance doubling of bidirectional devices. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting USB 2.0 D+ and D− lines against ESD events in portable medical devices and industrial HMIs. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between connector and USB transceiver IC to clamp transients before they reach PHY pins. Use Value: 148 pF capacitance preserves 480 Mbps eye diagram integrity; 88 V clamping prevents damage to 3.3 V tolerant transceivers. |
Use Scenario: Safeguarding HDMI TMDS clock and data channels in automotive infotainment head units exposed to assembly-line ESD. IC Role / Device Role / Timing Role: Standoff-rated TVS on each differential pair, grounded via shortest possible path to chassis ground plane. Use Value: 54 V VRWM accommodates HDMI common-mode voltage swing; ±30 kV ESD rating meets ISO 10605 requirements. |
| Automotive Sensor Interface | Industrial CAN Bus Node |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in engine control modules from cable-coupled transients. IC Role / Device Role / Timing Role: Single-diode clamp on sensor output line referenced to vehicle ground, placed adjacent to connector. Use Value: −65 °C to +175 °C operation survives under-hood thermal cycling; AEC-Q101 qualification ensures long-term reliability. |
Use Scenario: Protecting CAN_H and CAN_L pins of microcontrollers in factory automation PLCs subjected to motor-switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS on CAN_H (to ground) and CAN_L (to ground), leveraging 54 V standoff for 12 V/24 V bus systems. Use Value: 200 W peak pulse power absorbs repetitive switching surges; 148 pF avoids CAN FD bit-rate distortion. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ54A-E3/57T | DO-214AC (SMA) package; 1.9 mm height vs. SMF's 1.08 mm; 1000 W 8/20 µs rating same, but 150 W 10/1000 µs rating lower than SMF54A-HM3-08's 200 W. | Larger footprint limits use in ultra-thin consumer devices; better suited for board-edge surge protection where height is less constrained. | Select SMAJ54A-E3/57T only if legacy SMA layout exists or higher 8/20 µs surge margin is prioritized over board space and ESD speed. |
| TPSMD54A | DO-214AB (SMC) package; 2.6 mm height; 1000 W 8/20 µs, 200 W 10/1000 µs same; 150 pF capacitance slightly higher than SMF54A-HM3-08's 148 pF. | Higher thermal mass suits high-duty-cycle industrial environments; not AEC-Q101 qualified, limiting automotive use. | Choose TPSMD54A for non-automotive industrial nodes needing enhanced thermal dissipation, but verify layout clearance for 2.6 mm height. |
Compared with SMAJ54A-E3/57T and TPSMD54A, SMF54A-HM3-08 delivers the lowest profile (1.08 mm), AEC-Q101 qualification, and tightest capacitance tolerance - making it optimal for next-generation automotive and portable electronics where board space, reliability, and signal fidelity are co-constrained.
Availability
SMF54A-HM3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive sensor conditioning, and industrial CAN bus node designs requiring stable component supply across extended product lifecycles.
Supply support for SMF54A-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 Semiconductors is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMF series targets compact, high-speed ESD protection in automotive and industrial electronics, with design emphasis on low capacitance, AEC-Q101 compliance, and DO-219AB package miniaturization for modern PCB density demands.
FAQ
What is the clamping voltage of the SMF54A-HM3-08 at its rated peak pulse current?
The SMF54A-HM3-08 has a maximum clamping voltage (VC) of 88 V at a peak pulse current (IPPM) of 2.25 A using the 10/1000 µs waveform. This value is measured under standardized surge conditions and defines the upper voltage limit imposed on protected circuitry during transient events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMF54A-HM3-08 achieves this with low incremental surge resistance, minimizing overshoot beyond VC.
Is the SMF54A-HM3-08 suitable for automotive applications?
Yes, the SMF54A-HM3-08 is AEC-Q101 qualified and rated for operation from −65 °C to +175 °C, making it suitable for under-hood and cabin automotive applications including sensor interfaces, infotainment data lines, and body control modules. Its ±30 kV IEC 61000-4-2 ESD rating exceeds ISO 10605 requirements, and its DO-219AB package supports automated SMT assembly in high-volume automotive manufacturing. The SMF54A-HM3-08 is explicitly listed in Vishay's AEC-Q101 qualified portfolio.
What does the "HM3-08" suffix indicate in SMF54A-HM3-08?
The "HM3-08" suffix denotes Vishay's packaging and environmental coding: "H" indicates AEC-Q101 qualification, "M3" specifies lead (Pb)-free, RoHS-compliant tin plating, and "08" identifies 3000 units per 7-inch reel with 8 mm tape width. This full ordering code ensures traceability to qualified automotive-grade production lots and confirms compliance with JEDEC MSL Level 1 handling requirements. The SMF54A-HM3-08 is not a generic variant - it is the automotive-qualified, RoHS-compliant, tape-and-reel packaged version of the SMF54A.
How does the capacitance of SMF54A-HM3-08 affect high-speed signal integrity?
The SMF54A-HM3-08 exhibits 148 pF typical capacitance at 0 V bias and 1 MHz, which is carefully balanced for high-speed interfaces: low enough to avoid significant rise-time degradation on USB 2.0 (480 Mbps) and CAN FD (up to 5 Mbps) lines, yet sufficient to maintain effective ESD energy absorption. Unlike higher-capacitance TVS devices, this value minimizes signal reflection and jitter - confirmed in Vishay's application notes for USB and automotive serial bus protection. Designers using SMF54A-HM3-08 should place it within 5 mm of the protected connector for optimal performance.
Can SMF54A-HM3-08 replace bidirectional TVS diodes in DC-biased circuits?
Yes - the SMF54A-HM3-08 is unidirectional and ideal for DC-biased lines like USB D+, HDMI TMDS+, or CAN_H, where the signal swings positive relative to ground. In such cases, it provides lower capacitance and sharper clamping than equivalent bidirectional parts (which typically double capacitance). However, it must not be used on AC-coupled or symmetric differential lines without DC bias; for those, a bidirectional part like SMBJ54CA would be required. The SMF54A-HM3-08's cathode must always connect to the system ground reference to function correctly.
SMF54A-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):
- 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-HM3-08 FAQ
1.How can I place an order for SMF54A-HM3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-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 SMF54A-HM3-08 reliable?
The price and inventory of SMF54A-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 SMF54A-HM3-08 is usually 5 days.
3.What payment methods are accepted for SMF54A-HM3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-HM3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-HM3-08?
SMF54A-HM3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-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 SMF54A-HM3-08?
For technical support, including SMF54A-HM3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-HM3-08 requirements.
6.How does Aetrix verify that SMF54A-HM3-08 is sourced from the original manufacturer or authorized distributors?
All SMF54A-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 SMF54A-HM3-08 meets industry standards.
7.What is the process for return or replacement of SMF54A-HM3-08?
All SMF54A-HM3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-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 SMF54A-HM3-08 part is unused and in its original packaging.
Return procedure for SMF54A-HM3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-HM3-08 Tags
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