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Vishay General Semiconductor - Diodes Division SMBG54A-M3/5B
- Part No.:
- SMBG54A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG54A-M3/5B.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,588
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Product details
Overview
SMBG54A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, featuring 54 V stand-off voltage (VWM), 60.0–66.3 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 μs), 87.1 V clamping voltage (VC) at 6.9 A, and AEC-Q101 qualification for automotive-grade reliability. It protects MOSFETs and signal lines in automotive sensor units against inductive switching transients.
For engineers reviewing the SMBG54A-M3/5B datasheet, SMBG54A-M3/5B pinout, SMBG54A-M3/5B application, or SMBG54A-M3/5B equivalent, key selection criteria include unidirectional polarity, 54 V VWM, 87.1 V VC at rated IPPM, M3 halogen-free RoHS compliance, and SMBG package thermal resistance (RθJA = 100 °C/W).
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, conducting only when reverse voltage exceeds VBR to limit transient overvoltage. Its glass-passivated junction ensures stable leakage (<1.0 μA at VWM) and fast response time (<1 ns), while low incremental surge resistance enables effective energy diversion during 10/1000 μs surges.
The SMBG54A-M3/5B is rated for -55 °C to +150 °C junction temperature, meets MSL Level 1 per J-STD-020 (260 °C reflow peak), and supports automated SMT placement via matte tin-plated leads compliant with J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Ensures reliable turn-on above system operating voltage with margin |
| VC @ IPPM | 87.1 V at 6.9 A - Clamped voltage seen by protected IC under 600 W transient stress |
| PPPM | 600 W (10/1000 μs) - Peak surge power handling capability without failure |
| IFSM | 100 A (8.3 ms half-sine) - Forward surge current rating for unidirectional configuration |
| Junction Temp Range | -55 °C to +150 °C - Enables use in under-hood automotive environments |
| Leakage Current | ≤1.0 μA at VWM - Negligible standby power loss and signal integrity impact |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with cathode band marking on one end. Dimensions: 6.48 mm × 3.94 mm × 2.10 mm (L × W × H); 0.255" × 0.155" × 0.083". Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per Vishay recommendation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VREV > VBR |
| Anode | Reference/ground return path | Typically tied to system ground; completes clamping loop during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Halogen-free, RoHS-compliant (M3 suffix) | Meets environmental compliance requirements for industrial and automotive production |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients from load dump or inductive switching without degradation |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT assembly processes without moisture sensitivity concerns |
Applications
| Automotive Sensor Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and Hall-effect sensors in engine bay modules exposed to ISO 7637-2 pulse 1/2a/5a. IC Role / Device Role: Unidirectional TVS placed across signal line and ground to clamp negative-going transients. Use Value: Limits voltage to ≤87.1 V during 600 W surges, preventing latch-up or gate oxide damage in 54 V-rated interface ICs. | Use Scenario: Safeguarding microcontroller GPIOs and optocoupler inputs connected to relay coils or solenoid drivers. IC Role / Device Role: Parallel-connected transient suppressor absorbing inductive kickback from 24 V DC loads. Use Value: Maintains VWM = 54 V margin above 24 V nominal rail, ensuring no conduction during normal operation while clamping spikes to safe levels. |
| Power Supply Input Stage | Telecom Line Interface |
Use Scenario: Front-end protection for 48 V telecom power supplies subjected to lightning-induced surges per IEC 61000-4-5. IC Role / Device Role: Primary-level TVS on input rail before DC/DC converter, coordinated with upstream MOVs. Use Value: Fast response (<1 ns) and 600 W rating enable robust first-stage suppression without derating at elevated ambient temperatures. | Use Scenario: Overvoltage protection on RS-485 data lines in outdoor base stations vulnerable to EFT and surge coupling. IC Role / Device Role: Bidirectional-capable variant not applicable; SMBG54A-M3/5B used in unidirectional supply-side clamping for bias rails. Use Value: Low leakage (≤1.0 μA) avoids loading of precision bias networks while providing fail-safe clamping at 87.1 V. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54A-M3/5B | Same VWM (54 V), identical SMB package, but lower PPPM = 600 W (same rating), slightly higher VC = 87.1 V (identical), same AEC-Q101 qualification | No functional difference; SMBJ series uses DO-214AA package with identical footprint and electrical specs per Vishay cross-reference | Select SMBG54A-M3/5B when DO-215AA mechanical profile or specific thermal resistance (RθJA = 100 °C/W) is required. |
| 1.5SMC54AHE3/A | Same VWM and VC, but SMC (DO-214AB) package, higher RθJA = 125 °C/W, same 600 W rating, AEC-Q101 qualified (HE3 suffix) | Larger footprint (7.11 mm × 6.22 mm) and higher thermal resistance reduce suitability for dense automotive PCBs | Choose SMBG54A-M3/5B for space-constrained layouts where SMBG's smaller size (6.48 mm × 3.94 mm) and lower RθJA improve thermal performance. |
Compared with SMBJ54A-M3/5B and 1.5SMC54AHE3/A, the SMBG54A-M3/5B offers identical electrical protection performance in a more compact DO-215AA package with superior thermal resistance-critical for high-density automotive modules operating near thermal limits.
Availability
SMBG54A-M3/5B is available at Aetrix Electronics and suitable for automotive sensor protection, industrial motor drive inputs, and 48 V telecom power supply input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101-compliant transient suppression.
Supply support for SMBG54A-M3/5B 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 General Semiconductor designs and manufactures discrete semiconductors including diodes, rectifiers, and TVS devices, with emphasis on reliability, automotive qualification, and application-specific performance.
The SMBG series targets high-reliability transient suppression in space-constrained automotive and industrial systems, combining AEC-Q101 qualification, halogen-free construction, and optimized thermal design for under-hood deployment.
FAQ
What is the maximum clamping voltage of the SMBG54A-M3/5B under rated surge conditions?
The SMBG54A-M3/5B has a maximum clamping voltage (VC) of 87.1 V at 6.9 A peak pulse current (IPPM), measured with a 10/1000 μs waveform. This value defines the highest voltage imposed on the protected circuit during a 600 W transient event and is critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBG54A-M3/5B maintains this clamping performance across its full operating temperature range.
Is the SMBG54A-M3/5B suitable for automotive applications?
Yes, the SMBG54A-M3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensors, and body electronics. Its -55 °C to +150 °C junction temperature range, MSL Level 1 reflow compatibility, and halogen-free (M3) construction meet stringent automotive manufacturing and reliability requirements. The SMBG54A-M3/5B is designed to withstand harsh under-hood environments and repetitive transient stress.
What does the "M3" suffix indicate in SMBG54A-M3/5B?
Per Vishay's ordering nomenclature, the "M3" suffix in SMBG54A-M3/5B denotes halogen-free, RoHS-compliant construction with industrial-grade reliability. It confirms compliance with JEDEC J-STD-020 MSL Level 1, whisker resistance per JESD 201 Class 2, and matte tin-plated leads solderable per J-STD-002. The "5B" indicates 13-inch tape-and-reel packaging with 3200 units per reel.
How does the SMBG54A-M3/5B differ from bidirectional TVS diodes like SMBG54CA?
The SMBG54A-M3/5B is unidirectional and features a cathode band for polarity identification, enabling use in DC-biased circuits where only negative transients require suppression. In contrast, SMBG54CA is bidirectional with no polarity marking and symmetric clamping in both directions. The SMBG54A-M3/5B exhibits forward voltage drop (~3.5 V at 50 A) and 100 A IFSM, while SMBG54CA lacks forward conduction capability and IFSM rating.
What is the thermal resistance of the SMBG54A-M3/5B, and why does it matter?
The SMBG54A-M3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly impacts power dissipation capability and temperature rise during repeated transient events. Lower RθJA than alternatives (e.g., 125 °C/W for SMC packages) allows the SMBG54A-M3/5B to sustain higher surge repetition rates or operate reliably in thermally constrained automotive modules without exceeding 150 °C junction limit.
SMBG54A-M3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- Series:
- TransZorb®
- 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:
- 87.1V
- Current - Peak Pulse (10/1000µs):
- 6.9A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG54A-M3/5B FAQ
1.How can I place an order for SMBG54A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG54A-M3/5B 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 SMBG54A-M3/5B reliable?
The price and inventory of SMBG54A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG54A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG54A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG54A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG54A-M3/5B?
SMBG54A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG54A-M3/5B 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 SMBG54A-M3/5B?
For technical support, including SMBG54A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG54A-M3/5B requirements.
6.How does Aetrix verify that SMBG54A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG54A-M3/5B 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 SMBG54A-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG54A-M3/5B?
All SMBG54A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG54A-M3/5B, 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 SMBG54A-M3/5B part is unused and in its original packaging.
Return procedure for SMBG54A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG54A-M3/5B Tags
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