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Vishay General Semiconductor - Diodes Division SMF54A-HE3-08
- Part No.:
- SMF54A-HE3-08
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-HE3-08.pdf
- Description:
- TVS DIODE 54VWM 88VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:2,123
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Product details
Overview
SMF54A-HE3-08 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in DO-219AB (SOD-123W) package, designed for I/O line protection in high-speed digital interfaces. It features a 54 V standoff voltage (VRWM), 60–66 V breakdown range (VBR), 88 V maximum clamping voltage at 2.25 A peak pulse current, ±30 kV IEC 61000-4-2 ESD immunity, and 148 pF capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial sensor signal lines.
For engineers reviewing the SMF54A-HE3-08 datasheet, SMF54A-HE3-08 pinout, SMF54A-HE3-08 application, or SMF54A-HE3-08 equivalent, this device delivers verified low-clamping, AEC-Q101-qualified surge suppression with minimal parasitic capacitance for noise-sensitive data paths requiring robust transient protection without signal integrity degradation.
Technical Context
The SMF54A-HE3-08 operates as a single-channel unidirectional TVS diode, leveraging silicon avalanche technology to clamp transients above its reverse standoff voltage. Its low incremental surge resistance ensures rapid response (<1 ns) and stable clamping under 10/1000 μs pulses up to 200 W peak power.
Designed for PCB-level ESD and surge protection, it integrates into signal paths where bidirectional clamping is unnecessary and DC bias exists - such as RS-485 receivers, CAN FD data lines, or analog sensor inputs - with thermal resistance of 180 K/W on standard FR-4 layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 54 V - maximum continuous reverse operating voltage before conduction begins; sets upper limit for safe signal swing in protected circuits. |
| Breakdown Voltage (VBR) | 60–66 V at 1 mA - precise threshold where avalanche conduction initiates; enables predictable clamping onset across temperature. |
| Clamping Voltage (VC) | 88 V at IPPM = 2.25 A (10/1000 μs) - peak voltage seen by downstream circuit during surge; defines worst-case stress on protected ICs. |
| Capacitance (CD) | 148 pF at VR = 0 V, f = 1 MHz - low enough for USB 2.0 (480 Mbps) and HDMI 1.4 signal integrity; avoids excessive rise-time degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air per IEC 61000-4-2 - exceeds Level 4 immunity requirements for consumer and automotive infotainment ports. |
| Package | DO-219AB (SOD-123W) - 3.9 × 1.9 × 1.08 mm low-profile outline compatible with automated SMT assembly and reflow profiles up to 260 °C. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV, enabling use in ADAS camera modules and body control units. |
Pinout & Package
SMF54A-HE3-08 uses the DO-219AB (SOD-123W) surface-mount package: cathode-bar marked end indicates Pin 1 (cathode); Pin 2 is anode. The package supports wave and reflow soldering per J-STD-020 MSL level 1, with footprint recommendation of 2.9 mm × 1.4 mm pad length/width and 1.3 mm spacing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Pin 2) | Input reference node | Connected to protected signal line; carries surge current toward cathode during clamping event. |
| Cathode (Pin 1, marked) | Clamp return path | Connected to ground or lower-potential rail; establishes clamping voltage relative to reference plane. |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping voltage | 88 V at 2.25 A ensures downstream ICs (e.g., USB transceivers rated ≤100 V abs max) remain within safe operating area during surge events. |
| Ultra-low leakage | 0.1 μA max at VRWM = 54 V minimizes standby power loss and prevents false triggering in high-impedance sensor interfaces. |
| Fast response time | <1 ns typical enables effective suppression of ESD pulses (IEC 61000-4-2) before protected ICs experience overstress. |
| Automotive qualification | AEC-Q101 compliance confirms suitability for under-hood and cabin electronics requiring extended temperature operation (-65 °C to +175 °C). |
| Reflow-compatible packaging | SOD-123W outline meets IPC-7351B standards and withstands peak reflow temperatures up to 260 °C without delamination or parameter shift. |
Applications
| USB 2.0 Data Lines | HDMI 1.4 TMDS Channels |
|---|---|
Use Scenario: Protecting D+ and D− differential pairs in portable docking stations against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional clamping diode placed between connector and USB PHY IC to shunt transients to ground. Use Value: 148 pF capacitance preserves 480 Mbps eye diagram integrity while ±30 kV ESD rating prevents PHY latch-up or damage. |
Use Scenario: Shielding TMDS clock and data channels in set-top box HDMI outputs from electrostatic discharge during cable mating. IC Role / Device Role / Timing Role: Signal-line TVS diode mounted adjacent to HDMI connector to clamp fast-rising ESD pulses before reaching serializer IC. Use Value: 88 V clamping voltage stays below HDMI sink IC absolute maximum ratings (typically 100 V), preventing permanent failure. |
| Automotive Camera Sensor Interface | Industrial RS-485 Transceiver Port |
Use Scenario: Safeguarding MIPI CSI-2 lanes in rear-view camera modules exposed to chassis-ground ESD in vehicle assembly and service environments. IC Role / Device Role / Timing Role: Single-channel unidirectional TVS on each data line, referenced to camera module ground plane. Use Value: AEC-Q101 qualification and -65 °C to +175 °C operating range ensure reliability across automotive thermal cycles and vibration profiles. |
Use Scenario: Protecting RS-485 receiver inputs in factory automation PLCs from induced surges on long cable runs in electrically noisy environments. IC Role / Device Role / Timing Role: Standoff-rated TVS on A/B bus lines to clamp common-mode transients before they reach isolated transceiver inputs. Use Value: 54 V VRWM matches typical RS-485 common-mode range (±7 V to ±12 V), allowing full signal swing while blocking >54 V surges. |
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; 5.2 mm × 2.6 mm × 2.3 mm; 1000 W peak power (8/20 μs); higher clamping (93.6 V @ 5.2 A). | Larger footprint and higher thermal mass suit industrial power-line protection, not space-constrained high-speed data lines. | Select when board space allows larger package and higher surge energy handling is required beyond 200 W (10/1000 μs). |
| TPD2E001DRYR | 2-channel bidirectional array in SOT-563; 12 pF typical capacitance; 5.5 V VRWM; integrated ESD protection for low-voltage I/O. | Designed for 3.3 V logic-level interfaces (e.g., I²C, GPIO); not rated for 54 V standoff or automotive temperature range. | Choose for compact dual-line protection in low-voltage digital systems where VRWM < 6 V and ultra-low capacitance (<15 pF) is critical. |
Compared with SMAJ54A-E3/57T and TPD2E001DRYR, SMF54A-HE3-08 uniquely balances 54 V standoff, 148 pF capacitance, and AEC-Q101 qualification in a 3.9 mm × 1.9 mm footprint - making it optimal for automotive and industrial high-speed serial interfaces needing precise voltage margin and space efficiency.
Availability
SMF54A-HE3-08 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, automotive camera module design, and industrial RS-485 port hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for SMF54A-HE3-08 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, and optoelectronics for automotive, industrial, and computing markets.
The SMF series targets board-level ESD and surge protection in space-constrained, high-reliability applications - engineered for fast clamping, low capacitance, and AEC-Q101 compliance in compact surface-mount packages.
FAQ
What is the maximum clamping voltage of the SMF54A-HE3-08 under standard surge conditions?
The SMF54A-HE3-08 has a maximum clamping voltage (VC) of 88 V when subjected to a 10/1000 μs waveform with a peak pulse current (IPPM) of 2.25 A. This value is measured per IEC 61000-4-5 test conditions and defines the highest voltage that will appear across the protected line during a specified transient event. The SMF54A-HE3-08 maintains this clamping performance across its full operating temperature range of -65 °C to +175 °C.
Is the SMF54A-HE3-08 suitable for automotive applications?
Yes, the SMF54A-HE3-08 is AEC-Q101 qualified and rated for operation from -65 °C to +175 °C, making it suitable for automotive applications including infotainment interfaces, ADAS camera links, and body control modules. Its ±30 kV ESD immunity per IEC 61000-4-2 and HBM >8 kV rating meet stringent automotive ESD requirements. The SMF54A-HE3-08 is specifically designed for under-hood and cabin environments where thermal cycling and vibration resilience are essential.
What is the capacitance of the SMF54A-HE3-08 and how does it affect high-speed signal lines?
The SMF54A-HE3-08 exhibits a typical capacitance of 148 pF at 0 V reverse bias and 1 MHz frequency. This value is low enough to avoid significant signal distortion on USB 2.0 (480 Mbps) and HDMI 1.4 TMDS channels, preserving rise/fall times and eye opening. Capacitance decreases with increasing reverse voltage - e.g., ~40 pF at 54 V - further minimizing loading during normal operation. The SMF54A-HE3-08's capacitance profile is characterized and published in Vishay's datasheet Figure 5.
Does the SMF54A-HE3-08 have polarity marking, and how is it oriented on the PCB?
Yes, the SMF54A-HE3-08 features a cathode bar marking on the package body, identifying Pin 1 as the cathode terminal. When mounted on the PCB, the cathode must be connected to the system ground or lower-potential reference plane, while the anode connects to the signal line being protected. The DO-219AB (SOD-123W) footprint requires alignment with the cathode bar facing the designated ground pad. The SMF54A-HE3-08 orientation in tape is documented in Vishay's package drawing S8-V-3717.02-003.
What is the peak pulse power rating of the SMF54A-HE3-08 and under which waveform is it specified?
The SMF54A-HE3-08 is rated for 200 W peak pulse power under a 10/1000 μs double-exponential waveform, and 1000 W under an 8/20 μs waveform per IEC 61000-4-5. These ratings reflect its ability to absorb transient energy without failure. The 200 W rating applies to longer-duration surges like lightning-induced ring waves, while the 1000 W rating addresses shorter, higher-amplitude threats. Both values are guaranteed over the full -65 °C to +175 °C operating range. The SMF54A-HE3-08's power derating curve is provided in Figure 3 of the Vishay datasheet 85881.
SMF54A-HE3-08 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-HE3-08 FAQ
1.How can I place an order for SMF54A-HE3-08 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-HE3-08 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-HE3-08 reliable?
The price and inventory of SMF54A-HE3-08 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF54A-HE3-08 is usually 5 days.
3.What payment methods are accepted for SMF54A-HE3-08?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-HE3-08 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-HE3-08?
SMF54A-HE3-08 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-HE3-08 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-HE3-08?
For technical support, including SMF54A-HE3-08 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-HE3-08 requirements.
6.How does Aetrix verify that SMF54A-HE3-08 is sourced from the original manufacturer or authorized distributors?
All SMF54A-HE3-08 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-HE3-08 meets industry standards.
7.What is the process for return or replacement of SMF54A-HE3-08?
All SMF54A-HE3-08 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-HE3-08, 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-HE3-08 part is unused and in its original packaging.
Return procedure for SMF54A-HE3-08:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-HE3-08 Tags
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