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Vishay General Semiconductor - Diodes Division SMBG40-E3/52
- Part No.:
- SMBG40-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40-E3/52.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,761
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Product details
Overview
SMBG40-E3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMBG package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 40 V stand-off voltage (VWM), 44.4–49.1 V breakdown voltage (VBR) at 1 mA, 64.5 V maximum clamping voltage (VC) at 9.3 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used in automotive power supply input stages and industrial sensor interfaces.
For engineers reviewing the SMBG40-E3/52 datasheet, SMBG40-E3/52 pinout, SMBG40-E3/52 application, or SMBG40-E3/52 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-215AA package dimensions, thermal resistance data, and real-world protection use cases - all aligned to Vishay Document #88456 Rev. 12-Nov-12.
Technical Context
This unidirectional TVS diode operates as a voltage-clamped shunt protector: it remains high-impedance below 40 V and rapidly avalanches above ~44.4 V to divert surge energy away from downstream circuitry. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable breakdown behavior across temperature.
Designed for 10/1000 µs surge waveforms, the SMBG40-E3/52 sustains 9.3 A peak pulse current with 64.5 V clamping, delivering low incremental surge resistance and sub-nanosecond response time. It is rated for -55 °C to +150 °C junction operation and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before conduction begins; defines safe DC rail margin. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Confirmed avalanche onset range; ensures reliable triggering without premature breakdown. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage during 10/1000 µs surge; determines protected IC's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling capability; supports IEC 61000-4-5 Level 4 surge immunity designs. |
| IFSM | 100 A - 8.3 ms half-sine surge rating; validates robustness against inductive switch-off transients. |
| TJ max | +150 °C - Maximum junction temperature; enables placement near hot components in engine control units. |
| RθJA | 100 °C/W - Thermal resistance junction-to-ambient on 5 mm × 5 mm copper pads; informs heatsinking requirements. |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount, gull-wing lead form, matte tin-plated terminals compliant with J-STD-002 and JESD 22-B102. Cathode indicated by band marking on body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest potential node; completes clamping path during positive transients. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 40 V rail); conducts avalanche current toward anode when VAK > VBR. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive under-hood applications including powertrain and body control modules. |
| 600 W peak pulse power (10/1000 µs) | Supports EN 61000-4-5 surge testing up to 4 kV open-circuit voltage in industrial environments. |
| Glass-passivated junction | Ensures long-term stability of VBR and leakage current across thermal cycling and humidity exposure. |
| MSL Level 1 (260 °C peak) | Enables standard SMT reflow without moisture-induced popcorn failure or delamination. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets EU Directive 2011/65/EU; suitable for consumer, computing, and telecom equipment manufacturing. |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Clamp |
|---|---|
Use Scenario: 12 V/24 V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt clamp placed between power rail and chassis ground. Use Value: Limits transient excursions to ≤64.5 V, protecting 75 V-rated DC-DC controllers and microcontrollers. |
Use Scenario: Analog output lines from pressure or temperature sensors in factory automation PLCs. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) parallel clamp on 0–10 V or 4–20 mA loop outputs. Use Value: Prevents ESD-induced latch-up in op-amps and ADC front-ends while maintaining signal integrity. |
| Telecom DC Power Feeds | Computer Peripheral Port Protection |
Use Scenario: -48 V telecom rectifier outputs feeding base station RF modules. IC Role / Device Role / Timing Role: Reverse-biased TVS on negative rail relative to system ground. Use Value: Absorbs lightning-induced surges up to 600 W without degradation, preserving RF amplifier bias stability. |
Use Scenario: USB 2.0 VBUS and D+/D− lines in docking stations and external HDD enclosures. IC Role / Device Role / Timing Role: Standoff-rated clamp on 5 V supply and data lines to meet IEC 61000-4-2 Level 4. Use Value: Clamps ESD events to <65 V within <1 ns, preventing damage to USB transceivers and hub controllers. |
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-E3/52 | Same VWM (40 V) and VC (64.5 V), but lower PPPM = 400 W; smaller die size; RθJA = 110 °C/W. | Limited to lower-energy surges (e.g., IEC 61000-4-2 only); not recommended for IEC 61000-4-5 Level 3+. | Select SMBG40-E3/52 when 600 W surge headroom and AEC-Q101 qualification are required. |
| SMBG40HE3/52 | Identical electrical specs, but AEC-Q101 qualified (HE3 suffix) vs. commercial-grade E3; same DO-215AA package. | Required for automotive safety-critical modules (e.g., ADAS camera power supplies); higher traceability and test coverage. | Choose SMBG40HE3/52 for automotive OEM programs; SMBG40-E3/52 suffices for industrial/commercial BOMs. |
Compared with SMBJ40A-E3/52 and SMBG40HE3/52, the SMBG40-E3/52 provides full 600 W surge capacity in a commercial-grade, RoHS-compliant variant - balancing cost, performance, and manufacturability for non-automotive high-reliability systems.
Availability
SMBG40-E3/52 is available at Aetrix Electronics and suitable for automotive power input protection, industrial sensor signal line clamping, and telecom DC power feed applications requiring stable component supply, consistent lead-time visibility, and full traceability.
Supply support for SMBG40-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMBG series is part of Vishay's TRANSZORB® TVS platform, engineered for high-energy transient suppression in harsh environments - especially automotive, industrial, and telecom infrastructure where AEC-Q101 compliance and 600 W surge capability are critical.
FAQ
What is the maximum clamping voltage of SMBG40-E3/52 at its rated peak pulse current?
The SMBG40-E3/52 has a maximum clamping voltage (VC) of 64.5 V at its rated peak pulse current (IPPM) of 9.3 A under a 10/1000 µs waveform. This value is measured per Figure 1 in Vishay Document #88456 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMBG40-E3/52 suitable for automotive applications?
The SMBG40-E3/52 is RoHS-compliant and qualified to MSL Level 1, but it is the commercial-grade variant (E3 suffix). For automotive applications requiring AEC-Q101 qualification, the SMBG40HE3/52 variant must be used. The SMBG40-E3/52 itself is appropriate for non-safety-critical automotive subsystems where full AEC-Q101 is not mandated, such as infotainment power rails or cabin sensor interfaces.
What does the "-E3/52" suffix mean in SMBG40-E3/52?
In SMBG40-E3/52, "E3" denotes RoHS-compliant, commercial-grade construction meeting JESD201 Class 1A whisker resistance, while "/52" specifies packaging in 7″ diameter plastic tape and reel with a base quantity of 750 units. This ordering code aligns with Vishay's standardized delivery format for automated SMT assembly lines.
How does SMBG40-E3/52 differ from SMBJ40A-E3/52?
The SMBG40-E3/52 offers 600 W peak pulse power and RθJA = 100 °C/W, whereas SMBJ40A-E3/52 is rated for 400 W and has RθJA = 110 °C/W. Both share identical VWM (40 V) and VC (64.5 V), but the SMBG40-E3/52's larger die and optimized thermal pad layout enable higher surge endurance - making it preferable for IEC 61000-4-5 Level 4 compliance testing.
What is the reverse leakage current specification for SMBG40-E3/52 at its stand-off voltage?
The SMBG40-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its rated stand-off voltage (VWM) of 40 V, measured at TA = 25 °C. This low leakage ensures minimal power loss in always-on circuits and avoids false triggering in high-impedance monitoring paths - confirmed in Table "ELECTRICAL CHARACTERISTICS" on page 2 of Vishay Document #88456.
SMBG40-E3/52 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:
- 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 (SMBG)
SMBG40-E3/52 FAQ
1.How can I place an order for SMBG40-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40-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 SMBG40-E3/52 reliable?
The price and inventory of SMBG40-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 SMBG40-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40-E3/52?
SMBG40-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40-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 SMBG40-E3/52?
For technical support, including SMBG40-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40-E3/52 requirements.
6.How does Aetrix verify that SMBG40-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40-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 SMBG40-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40-E3/52?
All SMBG40-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40-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 SMBG40-E3/52 part is unused and in its original packaging.
Return procedure for SMBG40-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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