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Vishay General Semiconductor - Diodes Division SMBJ54AHM3_A/I
- Part No.:
- SMBJ54AHM3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54AHM3_A/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,538
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Product details
Overview
SMBJ54AHM3_A/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 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), clamping voltage of 87.1 V at 6.9 A, and operates across -55 °C to +150 °C junction temperature.
For engineers reviewing the SMBJ54AHM3_A/I datasheet, SMBJ54AHM3_A/I pinout, SMBJ54AHM3_A/I application, or SMBJ54AHM3_A/I equivalent, this device is selected for high-reliability industrial power supply input protection, automotive body control modules, and sensor interface surge hardening where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are critical design requirements.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only during reverse overvoltage events while remaining high-impedance under normal bias. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at 54 V), with thermal resistance of 100 °C/W (junction-to-ambient) on standard 0.2" × 0.2" copper pads.
The SMBJ54AHM3_A/I is halogen-free and RoHS-compliant (HM3 suffix), qualified to AEC-Q101 for automotive use, and rated for 100 A non-repetitive forward surge current (8.3 ms half-sine). Its MSL Level 1 rating supports lead-free reflow up to 260 °C peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on threshold under surge conditions. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamping voltage during 600 W 10/1000 µs surge; limits downstream voltage stress. |
| PPPM | 600 W - Peak pulse power handling capability per standardized waveform; validates protection level against IEC 61000-4-5 surges. |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms); supports high-energy inductive switching transients. |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive and industrial environments. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm × 4.06 mm footprint; compatible with automated pick-and-place and reflow. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads, polarity indicated by cathode band. Mounting requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal per Vishay specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / Reverse surge return path | Connected to protected line ground or low-side reference; completes conduction path during clamping. |
| Cathode | Reverse-biased terminal / Surge current sink | Connected to positive rail or signal line; avalanche breakdown occurs here during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 (4 kV) surge testing on 50 Ω source impedance. |
| AEC-Q101 qualified (HM3 suffix) | Validated for automotive applications including BCM, infotainment power inputs, and ADAS sensor interfaces. |
| Halogen-free & RoHS-compliant | Meets EU Directive 2011/65/EU and JEDEC J-STD-20D MSL Level 1 for lead-free assembly. |
| Low clamping ratio (VC/VBR ≈ 1.36) | Minimizes voltage overshoot during clamping-critical for protecting 60 V-rated MOSFETs and controllers. |
| Fast response time (<1 ns) | Clamps transients before sensitive ICs experience destructive overvoltage, preserving system reliability. |
Applications
| Automotive Body Control Module (BCM) Power Input | Industrial PLC Digital I/O Protection |
|---|---|
|
Use Scenario: Protects 12 V/24 V supply inputs in BCMs from load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role: Unidirectional TVS placed between battery rail and DC-DC converter input. Use Value: Clamps 87.1 V peak during 600 W surge, preventing damage to upstream regulators and microcontrollers. |
Use Scenario: Shields 24 V digital input channels in programmable logic controllers from field-wiring induced transients. IC Role / Device Role: Standoff protection on optocoupler input side, parallel to series current-limiting resistor. Use Value: Withstands repeated 1 kV/500 A surges per IEC 61000-4-4, maintaining long-term reliability without degradation. |
| Automotive Sensor Signal Line (CAN/LIN) | Consumer Appliance Motor Drive Power Stage |
|
Use Scenario: Safeguards LIN bus transceivers and analog sensor outputs (e.g., temperature, pressure) from ESD and cable discharge events. IC Role / Device Role: Low-capacitance unidirectional clamp on signal line, referenced to local ground. Use Value: Sub-1 ns response ensures clamping occurs before transceiver ESD protection fails, preserving communication integrity. |
Use Scenario: Protects H-bridge MOSFET gates and bootstrap circuits in washing machine/dishwasher motor drives from inductive kickback. IC Role / Device Role: Clamp across DC bus (VCC–GND) and gate driver supply rails. Use Value: 100 A IFSM rating handles repetitive motor commutation spikes without thermal runaway. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ54AHE3_A/I | RoHS-compliant but not halogen-free; lacks AEC-Q101 qualification. | Suitable for commercial-grade industrial equipment where automotive qualification is unnecessary. | Select when halogen-free content and automotive qualification are not required; lower cost alternative. |
| SMBJ54CAHM3_A/I | Bidirectional variant with same VWM (54 V), symmetric clamping in both polarities. | Required for AC-coupled or dual-polarity signal lines (e.g., RS-485, audio), not DC power rails. | Choose only if bidirectional protection is needed; not a drop-in replacement for unidirectional use cases. |
Compared with SMBJ54AHM3_A/I, the HE3 variant trades halogen-free construction and AEC-Q101 qualification for cost savings in non-automotive settings, while the 54CAHM3 variant provides symmetrical clamping essential for AC signals but introduces higher capacitance and reduced DC blocking capability.
Availability
SMBJ54AHM3_A/I is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and consumer appliance power systems requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ54AHM3_A/I 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, TVS devices, and power MOSFETs with emphasis on reliability, ruggedness, and automotive-grade validation.
The SMBJ series was engineered for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom infrastructure where failure tolerance and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ54AHM3_A/I at its rated peak pulse current?
The SMBJ54AHM3_A/I has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPPM) of 6.9 A, measured under the standardized 10/1000 µs waveform. This value defines the upper voltage limit imposed on protected circuitry during a 600 W transient event and is confirmed in Vishay's datasheet revision 09-Jan-2024, page 2.
Is SMBJ54AHM3_A/I qualified for automotive applications?
Yes, SMBJ54AHM3_A/I is AEC-Q101 qualified, as indicated by the "HM3" suffix and confirmed in the ordering information table (page 3) and thermal characteristics note (page 3) of the Vishay datasheet. This qualification covers stress tests including temperature cycling, humidity bias, and mechanical shock, making SMBJ54AHM3_A/I suitable for under-hood and body electronics.
What does the "HM3" suffix signify in SMBJ54AHM3_A/I?
The "HM3" suffix in SMBJ54AHM3_A/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. Per Vishay's ordering information (page 3), HM3 parts meet JESD201 Class 2 whisker resistance and UL 94 V-0 flammability, distinguishing them from E3 (RoHS only) and HE3 (RoHS + AEC-Q101, but not halogen-free) variants.
Can SMBJ54AHM3_A/I be used in bidirectional signal protection?
No-SMBJ54AHM3_A/I is a unidirectional TVS diode, intended for DC rail or single-polarity signal protection. For bidirectional applications such as RS-485 or AC-coupled lines, the SMBJ54CAHM3_A/I variant must be used instead, as explicitly stated in the "DEVICES FOR BIDIRECTION APPLICATIONS" section of the datasheet.
What is the thermal resistance of SMBJ54AHM3_A/I under standard mounting conditions?
The SMBJ54AHM3_A/I has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Thermal Characteristics table (page 3). This value assumes no additional heatsinking and guides PCB layout for sustained power dissipation up to 5.0 W.
SMBJ54AHM3_A/I Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMBJ54AHM3_A/I FAQ
1.How can I place an order for SMBJ54AHM3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54AHM3_A/I 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 SMBJ54AHM3_A/I reliable?
The price and inventory of SMBJ54AHM3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ54AHM3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ54AHM3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54AHM3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54AHM3_A/I?
SMBJ54AHM3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54AHM3_A/I 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 SMBJ54AHM3_A/I?
For technical support, including SMBJ54AHM3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54AHM3_A/I requirements.
6.How does Aetrix verify that SMBJ54AHM3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54AHM3_A/I 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 SMBJ54AHM3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ54AHM3_A/I?
All SMBJ54AHM3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54AHM3_A/I, 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 SMBJ54AHM3_A/I part is unused and in its original packaging.
Return procedure for SMBJ54AHM3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54AHM3_A/I Tags
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