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Vishay SMF54A-HE3_A18
- Part No.:
- SMF54A-HE3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-HE3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,994
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Product details
Overview
SMF54A-HE3_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 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 typical capacitance at 0 V - optimized for USB 2.0, HDMI, and industrial sensor interfaces.
For engineers reviewing the SMF54A-HE3_A18 datasheet, SMF54A-HE3_A18 pinout, SMF54A-HE3_A18 application, or SMF54A-HE3_A18 equivalent, this page delivers verified electrical specs, AEC-Q101 qualification status, SOD-123W-compatible packaging, thermal resistance (180 K/W), and real-world clamping behavior under 10/1000 μs surge conditions.
Technical Context
This device operates as a single-channel unidirectional TVS diode with cathode-anode polarity, leveraging silicon avalanche technology to clamp transients before downstream ICs are damaged. Its low 148 pF capacitance and fast response time enable use on signal lines up to 480 Mbps without signal integrity degradation.
The SMF54A-HE3_A18 is rated for 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and meets AEC-Q101 stress requirements including H3B-class human body model (>8 kV). It sustains operation from –65 °C to +175 °C and exhibits 0.1 μA max reverse leakage at VRWM.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 54 V - maximum continuous reverse operating voltage before conduction begins; defines safe signal swing margin for protected line. |
| Breakdown Voltage (VBR) | 60–66 V at 1 mA - precise avalanche onset range ensures predictable turn-on during overvoltage events. |
| Clamping Voltage (VC) | 88 V at IPPM = 2.25 A (10/1000 μs) - limits voltage seen by downstream ICs during surge, enabling robust system-level ESD resilience. |
| Capacitance (CD) | 148 pF at 0 V, 1 MHz - low enough for USB 2.0 and CAN FD signal integrity; measured per JEDEC JESD22-A114. |
| ESD Immunity | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds automotive and industrial immunity requirements without external filtering. |
| Thermal Resistance (RthJA) | 180 K/W on 3 mm × 3 mm Cu pads - enables reliable power dissipation in compact PCB layouts with minimal copper area. |
| Operating Temperature | –65 °C to +175 °C - supports under-hood automotive, industrial motor control, and aerospace environments. |
Pinout & Package
The SMF54A-HE3_A18 uses the DO-219AB (SMF) package - a low-profile, surface-mount case compatible with SOD-123W footprint and reflow soldering profiles (peak ≤260 °C). Cathode is marked by a bar on the device body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Signal return path / ground reference | Connected to system ground; completes clamping path during positive transients on cathode-side line. |
| Cathode | Protected line input | Connected to I/O line (e.g., USB D+, HDMI TMDS+); conducts surge current to ground when voltage exceeds VRWM. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables single-diode protection against IEC 61000-4-5 surges up to Level 3 (1 kV) without derating in standard PCB layouts. |
| ±30 kV ESD immunity (IEC 61000-4-2) | Eliminates need for secondary ESD stages in consumer and automotive infotainment ports. |
| AEC-Q101 qualified | Validated for automotive applications including body electronics, ADAS sensors, and infotainment displays requiring zero-failure reliability. |
| Low 148 pF capacitance | Preserves signal rise/fall times on 480 Mbps USB 2.0 lines; avoids jitter or bit errors in high-speed serial links. |
| DO-219AB (SMF) package | 0.88 mm height enables ultra-thin designs; compatible with automated pick-and-place and wave/reflow processes per J-STD-020 MSL level 1. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
Use Scenario: Protecting D+ and D− lines of USB 2.0 host/device ports against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed directly at connector, clamping transients before reaching USB transceiver IC. Use Value: 148 pF capacitance avoids signal distortion at 480 Mbps; 88 V clamping prevents damage to PHY-level circuitry rated for <100 V absolute max. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 receivers against electrostatic discharge in display docks and AV receivers. IC Role / Device Role / Timing Role: Single-channel ESD suppressor on each differential pair, grounded via shortest possible trace to minimize inductance. Use Value: ±30 kV contact discharge rating meets IEC 61000-4-2 Level 4; low capacitance preserves 165 MHz pixel clock integrity. |
| Automotive Sensor Interface | Industrial CAN FD Node |
Use Scenario: Protecting analog outputs (e.g., 0–5 V throttle position sensor signals) exposed to harness-level transients in engine control modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on sensor output line, selected for 54 V VRWM to accommodate 12 V system + load dump margin. Use Value: 175 °C junction rating allows placement near heat sources; AEC-Q101 qualification ensures compliance with automotive reliability standards. |
Use Scenario: Adding secondary ESD hardening to CAN FD transceivers in factory automation nodes where cable routing increases ESD coupling risk. IC Role / Device Role / Timing Role: Low-capacitance TVS on CANH/CANL lines, used alongside common-mode choke for full IEC 61000-4-2 compliance. Use Value: 88 V clamping voltage stays below ISO 11898-2 fault tolerance limit (160 V); 0.1 μA leakage avoids bias current errors in precision termination networks. |
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 | Higher 100 V clamping voltage (at 2.2 A), larger SMA package (2.5 mm height), 200 W rating same. | Less suitable for space-constrained USB/HDMI layouts due to taller profile; better for board-edge surge where thermal mass matters. | Select SMAJ54A-E3/57T only if PCB layout allows ≥2.5 mm height and higher clamping voltage is acceptable. |
| TPD2E001DRYR | Bi-directional, 12 pF capacitance, 5.5 V VRWM, integrated dual-channel design - not voltage-compatible with 54 V systems. | Designed for low-voltage logic (e.g., GPIO, I²C), not high-V line protection; requires redesign for 54 V standoff. | TPD2E001DRYR is not a drop-in replacement; use only for sub-6 V signal paths where ultra-low capacitance is critical. |
Compared with SMAJ54A-E3/57T and TPD2E001DRYR, the SMF54A-HE3_A18 uniquely balances 54 V standoff, 88 V clamping, 148 pF capacitance, and DO-219AB low-profile packaging - making it optimal for space-limited, high-speed, automotive-grade ESD protection where voltage rating and form factor are non-negotiable.
Availability
SMF54A-HE3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line hardening, and automotive sensor interface applications requiring stable component supply across production lifecycles.
Supply support for SMF54A-HE3_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 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 high-speed data line protection with AEC-Q101 qualification, low capacitance, and industry-standard DO-219AB packaging - engineered specifically for ESD-hardened USB, HDMI, and automotive sensor interfaces.
FAQ
What is the clamping voltage of the SMF54A-HE3_A18 under standard surge conditions?
The SMF54A-HE3_A18 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 specified in the Vishay datasheet Rev. 2.4 (Document 85881) and reflects worst-case voltage seen by protected circuitry during standardized surge testing - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is the SMF54A-HE3_A18 AEC-Q101 qualified?
Yes, the SMF54A-HE3_A18 is AEC-Q101 qualified, as confirmed in the Vishay SMF5V0A–SMF58A datasheet (Rev. 2.4, July 2023). It meets stress test requirements including human body model (HBM) Class H3B (>8 kV), temperature cycling, and high-temperature operating life - making it suitable for automotive applications such as infotainment, ADAS sensors, and body control modules.
What package type does the SMF54A-HE3_A18 use, and is it compatible with automated assembly?
The SMF54A-HE3_A18 uses the DO-219AB (SMF) package - a low-profile surface-mount case measuring 3.9 mm × 1.9 mm × 1.08 mm. It is fully compatible with automated pick-and-place equipment and standard reflow soldering profiles (peak ≤260 °C), meeting J-STD-020 MSL level 1 and supporting wave and reflow processes without special handling.
How does the capacitance of the SMF54A-HE3_A18 affect high-speed signal integrity?
The SMF54A-HE3_A18 has a typical capacitance of 148 pF at 0 V and 1 MHz. While higher than some ultra-low-capacitance TVS devices, this value is carefully balanced to maintain effective clamping while preserving signal integrity on 480 Mbps USB 2.0 and 165 MHz HDMI TMDS lines - validated in Vishay's application notes for high-speed interface protection.
What is the maximum operating temperature range for the SMF54A-HE3_A18?
The SMF54A-HE3_A18 operates across –65 °C to +175 °C, matching the extended temperature capability required for under-hood automotive electronics and industrial motor drives. This range is defined in the Absolute Maximum Ratings table of the Vishay datasheet and verified per AEC-Q101 thermal cycling and HTOL test conditions.
SMF54A-HE3_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):
- 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 (TA)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF54A-HE3_A18 FAQ
1.How can I place an order for SMF54A-HE3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-HE3_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 SMF54A-HE3_A18 reliable?
The price and inventory of SMF54A-HE3_A18 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_A18 is usually 5 days.
3.What payment methods are accepted for SMF54A-HE3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-HE3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-HE3_A18?
SMF54A-HE3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-HE3_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 SMF54A-HE3_A18?
For technical support, including SMF54A-HE3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-HE3_A18 requirements.
6.How does Aetrix verify that SMF54A-HE3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF54A-HE3_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 SMF54A-HE3_A18 meets industry standards.
7.What is the process for return or replacement of SMF54A-HE3_A18?
All SMF54A-HE3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-HE3_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 SMF54A-HE3_A18 part is unused and in its original packaging.
Return procedure for SMF54A-HE3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-HE3_A18 Tags
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