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Vishay General Semiconductor - Diodes Division SMBJ40-E3/52
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- Part No.:
- SMBJ40-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ40-E3/52.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,370
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Product details
Overview
SMBJ40-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 40 V standoff voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 64.5 V at 9.3 A, and operates across –55 °C to +150 °C junction temperature.
For engineers reviewing the SMBJ40-E3/52 datasheet, SMBJ40-E3/52 pinout, SMBJ40-E3/52 application, or SMBJ40-E3/52 equivalent, key selection criteria include clamping performance under 8.3 ms surge, thermal resistance (RθJA = 100 °C/W), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on SMB (DO-214AA) footprint.
Technical Context
This TVS diode employs a glass-passivated silicon junction optimized for fast response (<1 ps) to transient events such as inductive switching spikes and ESD. Its unidirectional polarity-marked by a cathode band-enables integration into DC-biased circuits where reverse conduction must be blocked until clamping threshold is exceeded.
The device delivers 600 W peak pulse power per 10/1000 µs waveform with 0.01% duty cycle, and exhibits low incremental surge resistance to minimize voltage overshoot during high-current transients. Thermal design relies on 0.2" × 0.2" copper pads per terminal to sustain 5.0 W steady-state dissipation at TA = 50 °C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before leakage exceeds 1.0 µA; defines safe DC rail margin. |
| VBR (min/max) | 44.4 V / 49.1 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering above nominal rail. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamping voltage limits downstream IC stress during 10/1000 µs surge; critical for MOSFET gate protection. |
| PPPM | 600 W - Peak pulse power handling capability with standardized waveform; validates surge immunity per IEC 61000-4-5. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance under standard PCB layout; informs heatsinking requirements. |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine); supports inrush and fault-current tolerance. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive or industrial ambient environments. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102. Cathode identified by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to ground or lower-potential node; completes clamping loop during overvoltage event. |
| Cathode | Protected line connection / surge input | Connected to line being protected (e.g., 40 V supply rail); reverse-biased during normal operation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validated surge immunity for industrial power supply inputs and automotive load-dump scenarios. |
| Clamping voltage ≤ 64.5 V at 9.3 A | Ensures protected 40 V logic or power ICs remain below absolute maximum ratings during transients. |
| Low profile SMB (DO-214AA) package | Enables high-density PCB layouts and compatibility with standard SMT pick-and-place equipment. |
| Glass passivated junction | Provides stable VBR tolerance and long-term reliability under thermal cycling and humidity exposure. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets environmental compliance without halogen restrictions; suitable for consumer and industrial end equipment. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of 40 V auxiliary power rails against inductive kickback from solenoid drivers and relay coils. IC Role / Device Role: Unidirectional TVS placed between rail and ground to clamp positive transients only. Use Value: Limits voltage excursion to ≤64.5 V, preventing damage to MCU I/Os and gate drivers rated for 65 V max. |
Use Scenario: Guarding LIN bus transceiver power pins against battery dump and load-switching noise. IC Role / Device Role: Standoff-rated TVS absorbing 600 W surges while maintaining <1 µA leakage at 40 V. Use Value: Enables reliable operation in 12 V/42 V dual-battery systems without false resets or latch-up. |
| Telecom Power Supplies | Consumer USB-C PD Adapters |
|
Use Scenario: Secondary-side overvoltage suppression on 40 V bias rails feeding op-amps and ADC references. IC Role / Device Role: Fast-response transient suppressor with 100 °C/W RθJA for thermally constrained board areas. Use Value: Maintains clamping performance up to +125 °C ambient via validated junction temperature derating curves. |
Use Scenario: Input-stage surge protection for 40 V output rails in multi-port USB-C PD chargers. IC Role / Device Role: RoHS-compliant, automated-placement-ready TVS with 0.106 g unit weight and 7" tape/reel packaging. Use Value: Supports high-volume manufacturing with J-STD-020 MSL Level 1 reflow compatibility (260 °C peak). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No difference in circuit function or layout; selected when halogen-free material compliance is required. | Choose SMBJ40A-M3/52 for green manufacturing programs requiring halogen-free bill-of-materials. |
| SMCJ40A-E3/52 | Same VWM/VBR/VC, but higher 1500 W PPPM and larger SMC (DO-214AB) package (2.54 mm lead pitch vs. 2.29 mm). | Requires PCB pad revision; suited for higher-energy surge environments where 600 W is insufficient. | Choose SMCJ40A-E3/52 only when system-level surge testing exceeds IEC 61000-4-5 Level 4 and SMB footprint is not constrained. |
Compared with SMBJ40-E3/52, SMBJ40A-M3/52 offers identical protection performance with halogen-free construction, while SMCJ40A-E3/52 trades compactness for 2.5× higher pulse power in a larger footprint-making SMBJ40-E3/52 optimal for space-constrained 40 V rail protection where 600 W suffices.
Availability
SMBJ40-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and consumer USB-C PD adapters requiring stable component supply and RoHS-compliant transient protection.
Supply support for SMBJ40-E3/52 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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive qualification.
The SMBJ series is engineered for high-energy transient suppression in DC power and signal lines, targeting applications demanding precise clamping, fast response, and robust thermal performance in compact SMT packages.
FAQ
What is the standoff voltage rating of SMBJ40-E3/52?
The SMBJ40-E3/52 has a maximum reverse standoff voltage (VWM) of 40 V, meaning it remains non-conductive with leakage current ≤1.0 µA up to this DC or RMS voltage. This rating ensures compatibility with 40 V nominal power rails while providing sufficient margin before breakdown at 44.4–49.1 V. The value is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88392.
Does SMBJ40-E3/52 meet automotive qualification standards?
No, SMBJ40-E3/52 is a commercial-grade part with RoHS compliance (E3 suffix) but not AEC-Q101 qualified. For automotive applications, Vishay specifies the HE3 or HM3 suffix variants (e.g., SMBJ40AHE3_B), which undergo additional stress testing and are marked accordingly. SMBJ40-E3/52 is intended for industrial, telecom, and consumer use where AEC-Q101 is not mandated.
What is the clamping voltage of SMBJ40-E3/52 at its rated peak pulse current?
The SMBJ40-E3/52 clamps to a maximum of 64.5 V at its peak pulse current (IPPM) of 9.3 A, measured using the standard 10/1000 µs waveform. This clamping voltage defines the upper voltage limit imposed on protected circuitry during surge events and is critical for ensuring downstream components-such as 65 V-rated MOSFETs or regulators-remain within safe operating area.
Can SMBJ40-E3/52 be used in bidirectional protection circuits?
No, SMBJ40-E3/52 is a unidirectional TVS diode, identifiable by its cathode band marking. Bidirectional operation requires the CA suffix (e.g., SMBJ40CA). Using SMBJ40-E3/52 in AC or bipolar signal paths would result in forward conduction during negative half-cycles, causing failure. Always match suffix: "A" = unidirectional, "CA" = bidirectional.
What is the thermal resistance and recommended PCB layout for SMBJ40-E3/52?
SMBJ40-E3/52 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 Vishay document 88392. This layout minimizes thermal impedance to sustain 5.0 W steady-state power dissipation at TA = 50 °C and supports reliable operation up to TJ = +150 °C.
SMBJ40-E3/52 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 71.4V
- Current - Peak Pulse (10/1000µs):
- 8.4A
- Power - Peak Pulse:
- 600W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ40-E3/52 FAQ
1.How can I place an order for SMBJ40-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ40-E3/52 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 SMBJ40-E3/52 reliable?
The price and inventory of SMBJ40-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ40-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ40-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ40-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ40-E3/52?
SMBJ40-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ40-E3/52 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 SMBJ40-E3/52?
For technical support, including SMBJ40-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ40-E3/52 requirements.
6.How does Aetrix verify that SMBJ40-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ40-E3/52 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 SMBJ40-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ40-E3/52?
All SMBJ40-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ40-E3/52, 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 SMBJ40-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ40-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ40-E3/52 Tags
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