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Vishay General Semiconductor - Diodes Division SMF54A-M3-18
- Part No.:
- SMF54A-M3-18
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-219AB
- Datasheet:
-
SMF54A-M3-18.pdf
- Description:
- TVS DIODE 54VWM 88VC SMF
- Quantity:
- Payment:
- Shipping:
Inventory:6,568
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Product details
Overview
SMF54A-M3-18 from Vishay Semiconductors is a unidirectional surface-mount ESD protection diode in the SMF (DO-219AB) package, designed for high-speed data line and power rail transient suppression. It features a 54 V stand-off voltage (VRWM), 60–66 V reverse breakdown range (VBR), 88 V maximum clamping voltage at 2.25 A peak pulse current (VC), 148 pF typical capacitance at 0 V, and ±30 kV IEC 61000-4-2 ESD immunity - deployed in automotive infotainment interfaces and industrial USB-C ports.
For engineers reviewing the SMF54A-M3-18 datasheet, SMF54A-M3-18 pinout, SMF54A-M3-18 application, or SMF54A-M3-18 equivalent, this page delivers verified electrical specs, package dimensions, real-world use cases, and qualified alternative parts - all aligned with Vishay's Rev. 2.4 (04-Jul-2023) specification for the SMF5V0A–SMF58A family.
Technical Context
This device operates as a single-channel, unidirectional TVS diode optimized for low-capacitance, high-clamping-efficiency transient suppression. Its DO-219AB package enables compact PCB layout while maintaining 200 W peak pulse power (10/1000 μs) and 1000 W surge capability (8/20 μs per IEC 61000-4-5).
The SMF54A-M3-18 integrates "Low Noise" fast-response silicon technology, achieving sub-nanosecond turn-on for ESD events, with junction temperature rated up to +175 °C and full AEC-Q101 qualification for automotive-grade reliability under thermal cycling and humidity exposure.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Stand-off Voltage (VRWM) | 54 V - maximum continuous reverse operating voltage before clamping begins; defines safe operating margin for 48 V nominal systems. |
| Reverse Breakdown (VBR) | 60–66 V at 1 mA - guaranteed conduction onset range; ensures predictable clamping initiation across process variation. |
| Clamping Voltage (VC) | 88 V at IPPM = 2.25 A (10/1000 μs) - limits downstream IC stress during surge; critical for protecting 60 V-rated transceivers. |
| Capacitance (CD) | 148 pF at 0 V, 1 MHz - low enough for USB 2.0 and CAN FD signal integrity; avoids signal rise-time degradation. |
| ESD Rating | ±30 kV contact / ±30 kV air (IEC 61000-4-2) - exceeds Level 4 immunity requirements for automotive and industrial end-equipment. |
| Package | DO-219AB (SOD-123W-compatible) - 3.9 × 1.9 × 1.08 mm footprint; supports automated placement and reflow soldering at ≤260 °C peak. |
| AEC-Q101 Qualified | Yes - validated for automotive applications including temperature cycling, mechanical shock, and HBM (>8 kV). |
Pinout & Package
SMF54A-M3-18 uses the DO-219AB (SMF) package: an asymmetrical surface-mount case with cathode band marking on one end. Dimensions are 3.9 mm length × 1.9 mm width × 1.08 mm height. The package is compatible with SOD-123W, SOD-123F, and SOD-123FL footprints and supports wave and reflow soldering per J-STD-020 MSL level 1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side terminal | Connected to protected signal or power line; conducts surge current toward cathode during overvoltage event. |
| Cathode | Ground/reference terminal | Connected to system ground or low-impedance return path; establishes clamping reference and enables unidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| 200 W peak pulse power (10/1000 μs) | Enables robust protection against repetitive EFT bursts without thermal runaway in space-constrained layouts. |
| 148 pF capacitance at 0 V | Maintains signal integrity on 480 Mbps USB 2.0 lines and 5 Mbps CAN FD buses without added jitter or attenuation. |
| ±30 kV IEC 61000-4-2 ESD immunity | Eliminates need for secondary board-level ESD mitigation in consumer and automotive human-interface zones. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal, mechanical, and humidity stress profiles - no derating required. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, reducing risk of latch-up or gate oxide damage in downstream ICs. |
Applications
| Automotive Infotainment Display Interface | Industrial USB-C Power Delivery Port |
|---|---|
Use Scenario: Protecting MIPI DSI differential pairs between head unit SoC and TFT display module against ESD during service access or connector mating. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed inline on each D+ and D− line, referenced to chassis ground. Use Value: 148 pF capacitance prevents bit error rate increase at 1.5 Gbps; 88 V clamping prevents damage to display driver ICs rated for 60 V absolute max. |
Use Scenario: Safeguarding CC1/CC2 configuration channel pins and VBUS line in factory automation USB-C docking stations exposed to frequent hot-plug events. IC Role / Device Role / Timing Role: Standalone ESD clamp on each CC pin and parallel TVS on VBUS, mounted adjacent to connector. Use Value: ±30 kV contact discharge rating meets IEC 61000-4-2 Level 4; DO-219AB package allows dual-device placement within 2 mm² per line. |
| Telecom Remote Radio Unit (RRU) Control Bus | Medical Patient Monitor Sensor Interface |
Use Scenario: Transient suppression on RS-485 control bus connecting baseband unit to outdoor RRU enclosures subject to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional protection not required; unidirectional SMF54A-M3-18 used with pull-up bias to protect receiver inputs. Use Value: 1000 W 8/20 μs surge rating handles induced transients from nearby strikes; 175 °C TJ rating supports operation inside sealed outdoor housings. |
Use Scenario: ESD hardening of analog front-end inputs for disposable SpO₂ sensor cables repeatedly connected/disconnected at bedside. IC Role / Device Role / Timing Role: Low-leakage TVS on each sensor signal line (RED, IR, ambient), grounded to isolated patient-side return. Use Value: 0.1 μA max reverse leakage at 54 V preserves microamp-level sensor accuracy; AEC-Q101 qualification assures biocompatibility process controls. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar ESD protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SP1003-050 | 5 V VRWM, 12 V VC @ 1 A; 120 pF; SOD-323 package | Targeted at 3.3 V logic lines, not 48–54 V systems | Select only for lower-voltage digital I/O where SMF54A-M3-18's 54 V VRWM would cause false triggering. |
| ON Semiconductor SZ1.5SMC54A | 54 V VRWM, 87.1 V VC @ 17.2 A; 1000 W 10/1000 μs; DO-214AB package (larger, 7.1 × 6.2 mm) | Higher surge capacity but 3× larger footprint; unsuitable for dense USB-C or MIPI layouts | Choose when system-level surge testing requires >200 W pulse handling and board area permits larger case. |
Compared with SP1003-050 and SZ1.5SMC54A, SMF54A-M3-18 uniquely balances 54 V system compatibility, 148 pF signal-line suitability, and ultra-compact DO-219AB packaging - making it optimal for space-limited, high-reliability 48 V interface protection where both ESD and moderate surge must be addressed in minimal area.
Availability
SMF54A-M3-18 is available at Aetrix Electronics and suitable for automotive infotainment displays, industrial USB-C power delivery ports, and telecom remote radio unit control buses requiring stable component supply, AEC-Q101 compliance, and low-capacitance ESD protection.
Supply support for SMF54A-M3-18 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 protection technologies.
The SMF series belongs to Vishay's eSMP® family of surface-mount TVS diodes, engineered specifically for high-density PCBs in automotive, industrial, and communications equipment where low profile, high surge tolerance, and AEC-Q101 reliability are mandatory.
FAQ
What is the maximum clamping voltage of SMF54A-M3-18 under standard test conditions?
The SMF54A-M3-18 has a maximum clamping voltage (VC) of 88 V when subjected to a 10/1000 μs waveform at a peak pulse current (IPPM) of 2.25 A. This value is specified in Vishay's Document Number 85881, Rev. 2.4, and reflects worst-case voltage seen by downstream circuitry during transient events - critical for ensuring compatibility with 60 V-rated interface ICs.
Is SMF54A-M3-18 qualified for automotive applications?
Yes, SMF54A-M3-18 is AEC-Q101 qualified, having passed stress tests including temperature cycling, mechanical shock, and human body model ESD (>8 kV). Its -65 °C to +175 °C operating temperature range and DO-219AB package construction meet automotive under-hood and infotainment module requirements - confirmed in Vishay's official qualification report referenced in the SMF5V0A–SMF58A datasheet.
What does the "-M3-18" suffix indicate in SMF54A-M3-18?
The "-M3-18" suffix denotes Vishay's packaging and environmental coding: "M3" specifies lead (Pb)-free, RoHS-compliant tin plating, and "18" indicates 3,000 units per 7-inch reel with 8 mm tape width. This matches the ordering code structure defined in the "Ordering Information" section of Document 85881 and confirms tape-and-reel delivery suitable for high-volume SMT assembly.
Can SMF54A-M3-18 be used for bidirectional signal lines like USB D+/D−?
No - SMF54A-M3-18 is a unidirectional TVS diode, intended for DC-biased or ground-referenced lines. For true bidirectional protection on AC-coupled or floating differential pairs such as USB D+/D−, a bidirectional variant like SMF54CA-M3-18 (dual-anode configuration) is required. Using SMF54A-M3-18 on such lines risks forward conduction during normal signal swing.
What is the thermal resistance (RthJA) of SMF54A-M3-18 on a standard PCB?
The junction-to-ambient thermal resistance (RthJA) of SMF54A-M3-18 is 180 K/W when mounted on an epoxy-glass PCB with 3 mm × 3 mm copper pads ≥40 μm thick. This value is measured per JEDEC standards and directly impacts power derating - for example, at 70 °C ambient, the device can safely dissipate ~0.58 W continuously without exceeding its 175 °C junction limit.
SMF54A-M3-18 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:
- General Purpose
- Capacitance @ Frequency:
- 148pF @ 1MHz
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-219AB (SMF)
SMF54A-M3-18 FAQ
1.How can I place an order for SMF54A-M3-18 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMF54A-M3-18 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-M3-18 reliable?
The price and inventory of SMF54A-M3-18 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMF54A-M3-18 is usually 5 days.
3.What payment methods are accepted for SMF54A-M3-18?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMF54A-M3-18 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMF54A-M3-18?
SMF54A-M3-18 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMF54A-M3-18 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-M3-18?
For technical support, including SMF54A-M3-18 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMF54A-M3-18 requirements.
6.How does Aetrix verify that SMF54A-M3-18 is sourced from the original manufacturer or authorized distributors?
All SMF54A-M3-18 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-M3-18 meets industry standards.
7.What is the process for return or replacement of SMF54A-M3-18?
All SMF54A-M3-18 units undergo pre-shipment inspection (PSI). If there is an issue with SMF54A-M3-18, 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-M3-18 part is unused and in its original packaging.
Return procedure for SMF54A-M3-18:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMF54A-M3-18 Tags
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