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Vishay General Semiconductor - Diodes Division SMBJ54AHM3/I
- Part No.:
- SMBJ54AHM3/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ54AHM3/I.pdf
- Description:
- TVS DIODE 54VWM 87.1VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,388
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Product details
Overview
SMBJ54AHM3/I from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, designed to protect sensitive electronics against voltage transients induced by inductive load switching and lightning surges. 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 range.
For engineers reviewing the SMBJ54AHM3/I datasheet, SMBJ54AHM3/I pinout, SMBJ54AHM3/I application, or SMBJ54AHM3/I equivalent, this device is selected for robust overvoltage protection on DC power rails, MOSFET gate drivers, and sensor signal lines in industrial motor controls, automotive body electronics, and telecom interface circuits where fast response (<1 ns), low clamping ratio, and AEC-Q101 qualification are critical.
Technical Context
This TVS diode operates as a unidirectional avalanche clamp, conducting only when reverse voltage exceeds its breakdown threshold while blocking forward current until forward voltage reaches ~3.5 V at 50 A. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repetitive surge stress.
The SMBJ54AHM3/I is rated for 100 A non-repetitive peak forward surge current (8.3 ms half-sine), exhibits 0.057 %/°C temperature coefficient of VBR, and maintains <1.0 µA maximum reverse leakage at VWM, enabling use in low-power standby circuits without compromising quiescent current budgets.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 54 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 60.0 V / 66.3 V at 1 mA - Confirmed breakdown range ensures predictable turn-on with tight process control. |
| VC @ IPPM | 87.1 V at 6.9 A - Clamping voltage during 600 W transient; limits downstream IC stress to safe levels. |
| PPPM | 600 W (10/1000 µs waveform) - Peak surge handling capacity suitable for IEC 61000-4-5 Level 3/4 compliance testing. |
| IFSM | 100 A (8.3 ms half-sine) - Withstands high-energy inrush or fault currents without bond-wire fusing. |
| TJ max. | +150 °C - Enables deployment in under-hood automotive modules and industrial enclosures without derating. |
| Package | SMB (DO-214AA) - Standardized 2-pin SMD footprint compatible with automated assembly and IPC-7351B land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, cathode-banded unidirectional configuration. Dimensions: 4.57 mm × 3.94 mm × 2.20 mm (L × W × H), matte tin-plated leads, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to system ground or lower-potential node; carries full surge current during clamping. |
| Cathode | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); band marking identifies polarity for correct PCB orientation. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including body control modules and infotainment power supplies. |
| Halogen-free & RoHS-compliant (HM3 suffix) | Meets environmental compliance requirements for global OEM supply chains and industrial certifications. |
| 600 W peak pulse power (10/1000 µs) | Provides robust protection against ISO 7637-2 Pulse 1/2b and IEC 61000-4-5 combination wave surges. |
| Low clamping ratio (VC/VBR ≈ 1.38) | Minimizes voltage overshoot during transients, reducing risk of latch-up or oxide damage in protected ICs. |
| Fast response time (<1 ns) | Clamps before transient energy couples into downstream circuitry, preserving signal integrity on high-speed lines. |
Applications
| Industrial Motor Drives | Automotive Body Control Units |
|---|---|
|
Use Scenario: Protection of 48 V DC bus and gate driver inputs against inductive kickback from brushed/BLDC motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between high-side MOSFET source and ground to clamp negative-going transients. Use Value: Limits voltage excursions to ≤87.1 V during 6.9 A surges, preventing gate oxide rupture and ensuring >100,000-cycle reliability. |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller I/O pins from load dump and jump-start events in door modules. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply rail upstream of LDO regulators, activated within nanoseconds of overvoltage onset. Use Value: Maintains <1.0 µA leakage at 54 V, avoiding battery drain in always-on nodes while surviving 100 A surge pulses. |
| Telecom Power Interfaces | Industrial Sensor Signal Conditioning |
|
Use Scenario: Input-stage protection for PoE-powered equipment receiving up to 57 V DC from midspan injectors. IC Role / Device Role / Timing Role: Primary overvoltage clamp on DC input before DC-DC converter, sized to absorb IEEE 802.3af/bt surge energy. Use Value: Delivers 600 W clamping capability with 87.1 V ceiling, enabling compliance with EN 61000-4-5 (4 kV) without additional stages. |
Use Scenario: Shielding analog front-end amplifiers and ADC inputs from ESD and cable discharge events in factory-floor pressure/temperature sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed directly at connector entry point to shunt transients before signal path. Use Value: Achieves sub-1 ns response and 0.057 %/°C VBR stability, ensuring consistent protection across ambient temperatures from -40 °C to +85 °C. |
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/I | RoHS-compliant but not halogen-free; same electrical specs and AEC-Q101 qualification. | Preferred for commercial-grade designs where halogen content is unrestricted. | Select when cost sensitivity outweighs halogen-free requirement and automotive qualification is still needed. |
| SMBJ54CAHM3/I | Bidirectional variant with symmetric 54 V VWM; same package, power rating, and AEC-Q101 status. | Required for AC-coupled or bidirectional signal lines (e.g., RS-485, CAN FD) where polarity reversal occurs. | Choose only if protecting balanced differential interfaces or systems subject to reversible transients. |
Compared with SMBJ54AHM3/I, the HE3/I variant trades halogen-free construction for slightly lower unit cost without sacrificing AEC-Q101 compliance, while the 54CAHM3/I enables bidirectional clamping at identical surge ratings-making SMBJ54AHM3/I optimal for unidirectional 48 V DC rail protection where material compliance is mandatory.
Availability
SMBJ54AHM3/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control units, and telecom power interfaces requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.
Supply support for SMBJ54AHM3/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 optoelectronics with emphasis on reliability, power efficiency, and automotive-grade validation.
The SMBJ series was engineered specifically for high-energy transient suppression in harsh environments, targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification and repeatable clamping performance.
FAQ
What is the clamping voltage of SMBJ54AHM3/I at its rated peak pulse current?
The SMBJ54AHM3/I has a maximum clamping voltage (VC) of 87.1 V at its peak pulse current (IPPM) of 6.9 A under a 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected downstream circuitry will not experience voltages exceeding 87.1 V during a 600 W transient event. The SMBJ54AHM3/I maintains this clamping performance across its specified operating temperature range.
Is SMBJ54AHM3/I qualified for automotive applications?
Yes, SMBJ54AHM3/I is AEC-Q101 qualified, as confirmed by Vishay's ordering code suffix "HM3" and documentation in datasheet revision 09-Jan-2024. This qualification validates its reliability for use in automotive subsystems such as body control modules, lighting drivers, and infotainment power supplies. The SMBJ54AHM3/I meets stress test requirements including temperature cycling, humidity bias, and mechanical shock per AEC-Q101.
What does the "HM3" suffix indicate in SMBJ54AHM3/I?
The "HM3" suffix in SMBJ54AHM3/I denotes halogen-free, RoHS-compliant construction with AEC-Q101 qualification. It distinguishes this variant from "HE3" (RoHS-compliant, AEC-Q101, but not halogen-free) and "E3/M3" (commercial grade only). The HM3 version satisfies strict environmental mandates for automotive and industrial OEMs, including JESD201 Class 2 whisker resistance and UL 94 V-0 flammability rating of the molding compound.
How does SMBJ54AHM3/I differ from SMBJ54AHE3/I?
SMBJ54AHM3/I and SMBJ54AHE3/I share identical electrical specifications-including VWM = 54 V, VBR = 60.0–66.3 V, PPPM = 600 W, and AEC-Q101 qualification-but differ in material composition: HM3 is halogen-free, while HE3 is RoHS-compliant without halogen restrictions. Both use the same SMB (DO-214AA) package and matte tin-plated leads. The SMBJ54AHM3/I is selected when halogen-free compliance is contractually required.
What is the maximum reverse leakage current for SMBJ54AHM3/I at rated standoff voltage?
The SMBJ54AHM3/I exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated standoff voltage (VWM) of 54 V and ambient temperature of 25 °C. This low leakage supports energy-efficient designs in battery-backed or always-on systems. Leakage remains below 5.0 µA up to +125 °C junction temperature, as verified in Vishay's thermal derating curves.
SMBJ54AHM3/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:
- Discontinued at Digi-Key
- 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/I FAQ
1.How can I place an order for SMBJ54AHM3/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ54AHM3/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/I reliable?
The price and inventory of SMBJ54AHM3/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/I is usually 5 days.
3.What payment methods are accepted for SMBJ54AHM3/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ54AHM3/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ54AHM3/I?
SMBJ54AHM3/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ54AHM3/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/I?
For technical support, including SMBJ54AHM3/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ54AHM3/I requirements.
6.How does Aetrix verify that SMBJ54AHM3/I is sourced from the original manufacturer or authorized distributors?
All SMBJ54AHM3/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/I meets industry standards.
7.What is the process for return or replacement of SMBJ54AHM3/I?
All SMBJ54AHM3/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ54AHM3/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/I part is unused and in its original packaging.
Return procedure for SMBJ54AHM3/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ54AHM3/I Tags
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