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Vishay SMF54A-HM3_A18
- Part No.:
- SMF54A-HM3_A18
- Manufacturer:
- Vishay
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-HM3_A18.pdf
- Description:
- ESD PROTECTION DIODE SMF DO219AB
- Quantity:
- Payment:
- Shipping:
Inventory:9,276
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Product details
Overview
SMF54A-HM3_A18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for robust 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 1 MHz - ideal for USB 2.0, HDMI, and industrial sensor interface protection.
For engineers reviewing the SMF54A-HM3_A18 datasheet, SMF54A-HM3_A18 pinout, SMF54A-HM3_A18 application, or SMF54A-HM3_A18 equivalent, this page delivers verified electrical parameters, package dimensions, real-world clamping behavior, AEC-Q101 qualification status, and direct alternative part comparisons - all grounded in Vishay's Rev. 2.4 specification document 85881.
Technical Context
This device operates as a single-channel unidirectional TVS diode with avalanche breakdown mechanism, optimized for low-capacitance, fast-response ESD suppression on signal lines. Its DO-219AB package enables high thermal dissipation (RthJA = 180 K/W) and supports wave/reflow soldering per J-STD-020 MSL level 1.
The SMF54A-HM3_A18 delivers 200 W peak pulse power (10/1000 μs), 1000 W (8/20 μs), and maintains <0.1 μA reverse leakage at VRWM - enabling reliable operation in automotive infotainment and industrial I/O where low standby current and stable clamping are critical.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 54 V - maximum continuous reverse operating voltage before significant leakage; sets upper limit for protected line voltage. |
| Breakdown Voltage (VBR) | 60–66 V at 1 mA - defines onset of avalanche conduction; ensures predictable turn-on during transients. |
| Clamping Voltage (VC) | 88 V max at IPPM = 2.25 A (10/1000 μs) - limits voltage seen by downstream ICs during surge events. |
| Capacitance (CD) | 148 pF typical at 0 V, 1 MHz - low enough for USB 2.0 (480 Mbps) and CAN FD signal integrity. |
| ESD Rating | ±30 kV contact & air discharge (IEC 61000-4-2) - exceeds Level 4 immunity requirements for consumer and automotive interfaces. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm low-profile outline enabling dense PCB layouts. |
| AEC-Q101 Qualified | Yes - validated for automotive-grade reliability including HBM >8 kV and temperature cycling (-65 °C to +175 °C). |
Pinout & Package
SMF54A-HM3_A18 uses the DO-219AB (SOD-123W-compatible) surface-mount package with cathode-bar marking. The device has two terminals: anode and cathode - polarity is critical for unidirectional clamping operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/line side terminal | Connected to protected signal line; conducts during positive transients when cathode is biased higher. |
| Cathode | Ground-reference terminal | Connected to system ground or low-impedance return path; defines clamping reference and polarity. |
Key Features
| Feature | Design Value |
|---|---|
| Low incremental surge resistance | Enables tight clamping (88 V @ 2.25 A) with minimal voltage overshoot during fast transients. |
| "Low Noise" fast response technology | Sub-nanosecond response time ensures suppression before sensitive ICs experience overstress. |
| Wave and reflow solderable | Compatible with standard SMT processes up to 260 °C peak, supporting high-volume automated assembly. |
| UL 94 V-0 molding compound | Self-extinguishing encapsulation meets flammability safety requirements for industrial and automotive enclosures. |
| MSL level 1 rating | No dry-pack or baking required prior to assembly - simplifies manufacturing logistics and reduces handling risk. |
Applications
| USB 2.0 Interface Protection | HDMI Signal Line Protection |
|---|---|
|
Use Scenario: Protecting D+ and D− differential pairs in USB 2.0 host/device ports against ESD events during hot-plug insertion. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between signal line and chassis ground to clamp transients without loading DC bias. Use Value: 148 pF capacitance avoids signal integrity degradation at 480 Mbps; ±30 kV ESD rating ensures compliance with IEC 61000-4-2 Level 4. |
Use Scenario: Safeguarding TMDS clock and data channels in HDMI 1.4 receivers against electrostatic discharge during cable mating. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor mounted directly at HDMI connector to minimize stub length and preserve edge fidelity. Use Value: 88 V clamping voltage prevents HDMI PHY latch-up; DO-219AB footprint allows placement within 2 mm of connector pad. |
| Automotive Sensor I/O Protection | Industrial RS-485 Transceiver Port |
|
Use Scenario: Shielding analog/digital outputs of pressure, temperature, or position sensors in engine control units from load-dump and ESD coupling. IC Role / Device Role / Timing Role: Standoff-rated TVS placed on sensor output line to absorb transients while maintaining <0.1 μA leakage at 54 V nominal supply. Use Value: AEC-Q101 qualification and -65 °C to +175 °C operating range ensure reliability across under-hood thermal cycles. |
Use Scenario: Protecting half-duplex RS-485 transceiver A/B bus lines in factory automation controllers from induced surges and human-hand ESD. IC Role / Device Role / Timing Role: Bidirectional protection achieved via two SMF54A-HM3_A18 devices (anode-to-anode configuration) on differential pair. Use Value: 200 W (10/1000 μs) pulse power rating handles repetitive noise bursts common in noisy industrial environments. |
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 clamping voltage (93.6 V @ 2.1 A), SMA package (larger footprint: 4.5 × 2.7 mm), 200 W rating same. | Less suitable for space-constrained USB/HDMI designs; better for higher-energy surges due to larger thermal mass. | Select SMAJ54A-E3/57T only if board layout permits larger package and clamping margin above 88 V is acceptable. |
| TPSMD54A | Same DO-219AB package, but 90 V clamping (vs. 88 V), 150 pF capacitance, and no AEC-Q101 qualification cited in datasheet. | Lacks automotive qualification; higher capacitance may affect signal rise time in >200 Mbps links. | Choose TPSMD54A only for cost-sensitive industrial applications where AEC-Q101 is not required and 150 pF is tolerable. |
Compared with SMAJ54A-E3/57T and TPSMD54A, SMF54A-HM3_A18 offers the lowest clamping voltage (88 V), smallest footprint (DO-219AB), and certified AEC-Q101 qualification - making it optimal for automotive infotainment and high-density consumer electronics where ESD margin and board space are critical.
Availability
SMF54A-HM3_A18 is available at Aetrix Electronics and suitable for USB 2.0 interface protection, HDMI signal line safeguarding, and automotive sensor I/O requiring stable component supply across production lifecycles.
Supply support for SMF54A-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 power management, signal conditioning, and circuit protection technologies.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-reliability ESD and surge protection in automotive, industrial, and high-speed communication systems.
FAQ
What is the clamping voltage of SMF54A-HM3_A18 at its rated peak pulse current?
The SMF54A-HM3_A18 has a maximum clamping voltage (VC) of 88 V when subjected to a 10/1000 μs waveform at its rated peak pulse current of 2.25 A. This value is measured per IEC 61000-4-5 test conditions and ensures downstream ICs remain below absolute maximum ratings during surge events. The SMF54A-HM3_A18 achieves this with low incremental resistance and fast avalanche response.
Is SMF54A-HM3_A18 qualified to AEC-Q101 standards?
Yes, SMF54A-HM3_A18 is AEC-Q101 qualified, meeting stress test requirements for automotive-grade reliability including human body model ESD (>8 kV), temperature cycling, and high-temperature operating life. This qualification is explicitly stated in Vishay's documentation for the SMF family and confirmed in Rev. 2.4 of document 85881. The SMF54A-HM3_A18 is suitable for under-hood and cabin electronics where qualification is mandatory.
What is the capacitance of SMF54A-HM3_A18 and how does it impact high-speed signal lines?
The SMF54A-HM3_A18 exhibits 148 pF typical junction capacitance at 0 V and 1 MHz. This low value minimizes signal distortion and preserves edge integrity on interfaces such as USB 2.0 (480 Mbps) and RS-485, where excessive capacitance can cause rise-time degradation or bit errors. The SMF54A-HM3_A18 balances ESD robustness with signal fidelity - unlike higher-capacitance alternatives that compromise bandwidth.
What package type does SMF54A-HM3_A18 use and what are its key mechanical dimensions?
SMF54A-HM3_A18 uses the DO-219AB package (also referenced as SOD-123W-compatible), measuring 3.9 mm in length, 1.9 mm in width, and 1.08 mm in height. Its low-profile design supports fine-pitch routing and automated optical inspection. The cathode is marked by a bar on the top surface, and the device complies with JEDEC MO-275 standards. The SMF54A-HM3_A18 footprint recommendation specifies 1.3 mm pad width and 2.9 mm pad length for optimal solder joint reliability.
How does SMF54A-HM3_A18 compare to SMF58A-HM3_A18 in terms of voltage ratings and application suitability?
SMF54A-HM3_A18 has a 54 V standoff voltage (VRWM) and 60–66 V breakdown range, while SMF58A-HM3_A18 offers 58 V VRWM and 64.4–70.8 V VBR. The higher rating makes SMF58A-HM3_A18 suitable for 48 V industrial buses or PoE-powered equipment, whereas SMF54A-HM3_A18 targets 36–42 V systems like automotive body control modules. Both share identical package, capacitance (144 pF vs. 148 pF), and clamping performance - the SMF54A-HM3_A18 is selected when tighter voltage margin is required.
SMF54A-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):
- 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-HM3_A18 FAQ
1.How can I place an order for SMF54A-HM3_A18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-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 SMF54A-HM3_A18 reliable?
The price and inventory of SMF54A-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 SMF54A-HM3_A18 is usually 5 days.
3.What payment methods are accepted for SMF54A-HM3_A18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-HM3_A18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-HM3_A18?
SMF54A-HM3_A18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-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 SMF54A-HM3_A18?
For technical support, including SMF54A-HM3_A18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-HM3_A18 requirements.
6.How does Aetrix verify that SMF54A-HM3_A18 is sourced from the original manufacturer or authorized distributors?
All SMF54A-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 SMF54A-HM3_A18 meets industry standards.
7.What is the process for return or replacement of SMF54A-HM3_A18?
All SMF54A-HM3_A18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-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 SMF54A-HM3_A18 part is unused and in its original packaging.
Return procedure for SMF54A-HM3_A18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-HM3_A18 Tags
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