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Vishay General Semiconductor - Diodes Division SMBG40A-E3/5B
- Part No.:
- SMBG40A-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40A-E3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG40A-E3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal lines. It features 40 V stand-off 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 AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40A-E3/5B datasheet, SMBG40A-E3/5B pinout, SMBG40A-E3/5B application, or SMBG40A-E3/5B equivalent, key selection criteria include clamping performance under 8.3 ms surge, thermal resistance (RθJA = 100 °C/W), unidirectional polarity with cathode band marking, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 40 V, it avalanches at VBR = 44.4–49.1 V and limits transient energy by diverting up to 9.3 A (IPPM) while clamping to ≤64.5 V. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns).
Thermally, it supports operation from –55 °C to +150 °C junction temperature, with RθJL = 20 °C/W enabling effective heat transfer to PCB leads. The device meets MSL Level 1 (260 °C reflow peak) and is qualified to AEC-Q101 for automotive under-hood and infotainment systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Ensures reliable avalanche initiation across process variation |
| VC @ IPPM | 64.5 V at 9.3 A - Limits protected circuit voltage during 10/1000 µs transients |
| PPPM | 600 W - Sustains high-energy surges without failure at 0.01% duty cycle |
| IFSM | 100 A - Withstands 8.3 ms half-sine surge, critical for load-dump immunity |
| Junction Temp Range | –55 °C to +150 °C - Enables use in under-hood automotive and industrial environments |
| Leakage Current | ≤1.0 µA at 40 V - Minimizes standby power loss in battery-powered systems |
Pinout & Package
Package: SMBG (DO-215AA), 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 / Reverse surge return path | Connected to ground or low-impedance return in unidirectional configuration |
| Cathode | Reverse voltage sensing / Clamping node | Connected to protected line; band-marked end defines polarity and mounting orientation |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units and ADAS sensors |
| 600 W peak pulse power | Handles ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surges without degradation |
| Glass passivated junction | Ensures long-term stability of VBR and leakage under thermal cycling and humidity stress |
| MSL Level 1 rating | Supports standard lead-free reflow profiles up to 260 °C peak without popcorn or delamination |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, inductive switching) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between power rail and chassis ground to clamp surges above 40 V. Use Value: Clamps to 64.5 V at 9.3 A, limiting downstream IC stress below 70 V while surviving 100 A single-half-sine surge. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Low-capacitance TVS on signal line to ground, suppressing fast EFT bursts (IEC 61000-4-4) without distorting mV-level signals. Use Value: Leakage <1.0 µA preserves signal integrity; 64.5 V clamping protects 3.3 V/5 V ADC front-ends from latch-up. |
| Telecom DC Power Input Protection | Consumer Device USB Power Line Protection |
Use Scenario: Securing 48 V PoE-powered equipment inputs against lightning-induced surges (IEC 61000-4-5 Level 3). IC Role / Device Role / Timing Role: Primary TVS on DC input stage, coordinated with upstream fuse and secondary filtering. Use Value: 600 W rating absorbs multi-kV transients; DO-215AA footprint allows compact layout near connector. | Use Scenario: Adding surge resilience to USB-C VBUS lines in portable audio/video devices subjected to hot-plug and cable discharge events. IC Role / Device Role / Timing Role: Unidirectional TVS between VBUS and GND, selected for fast response (<1 ns) and low leakage. Use Value: Clamps 8/20 µs surges to ≤64.5 V before damage occurs to USB PD controller ICs rated for 28 V max. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-E3/5B | Same VWM (40 V), lower PPPM (600 W same), but higher VC = 64.5 V vs. SMBJ's 64.5 V - identical clamping; SMBJ uses DO-214AA (SMB) package with larger pad area | SMBJ40A has higher RθJA (~120 °C/W) and less robust thermal performance under sustained surge duty | Select SMBG40A-E3/5B when board space is constrained and thermal management relies on lead conduction (RθJL = 20 °C/W) |
| SMCJ40A-E3/5B | Same VWM/VBR, higher PPPM = 1500 W, larger SMC (DO-214AB) package, VC = 64.5 V at 23.3 A | Higher surge capacity suits 10/1000 µs transients >1000 W; not suitable for space-constrained layouts | Choose SMBG40A-E3/5B where 600 W suffices and DO-215AA footprint enables tighter routing near connectors or ICs |
Compared with SMBJ40A-E3/5B and SMCJ40A-E3/5B, SMBG40A-E3/5B delivers identical clamping performance in a smaller DO-215AA package with superior lead-to-case thermal conduction-ideal for automotive modules and dense industrial PCBs where layout area and thermal path efficiency are prioritized over ultra-high surge margin.
Availability
SMBG40A-E3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom power inputs, and consumer USB-C power line protection requiring stable component supply and AEC-Q101 compliance.
Supply support for SMBG40A-E3/5B 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 is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, automotive qualification, and high-volume manufacturability.
The SMBG series is engineered for surface-mount transient suppression in harsh environments-designed specifically to meet AEC-Q101 requirements while delivering consistent clamping and low leakage in compact DO-215AA packaging.
FAQ
What is the maximum clamping voltage of SMBG40A-E3/5B under standard test conditions?
The SMBG40A-E3/5B exhibits a maximum clamping voltage (VC) of 64.5 V when subjected to its rated peak pulse current (IPPM) of 9.3 A using the 10/1000 µs waveform. This value is measured per JEDEC standards and guarantees that protected circuits remain below 65 V during transient events, preserving downstream ICs rated for ≤70 V operation. The SMBG40A-E3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG40A-E3/5B suitable for automotive applications?
Yes, SMBG40A-E3/5B is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, body electronics, and ADAS sensor interfaces. Its –55 °C to +150 °C junction temperature range, 100 A IFSM surge capability, and MSL Level 1 reflow compatibility meet stringent automotive manufacturing and field reliability requirements. The SMBG40A-E3/5B data sheet confirms qualification per AEC-Q101 Rev D.
How does the SMBG40A-E3/5B package differ from SMBJ40A?
The SMBG40A-E3/5B uses the DO-215AA (SMBG) package, which is dimensionally distinct from the DO-214AA (SMB) used by SMBJ40A: SMBG has a narrower body (4.06 mm vs. 4.57 mm width) and shorter lead length, enabling tighter pitch layouts. Both are surface-mount, but SMBG offers lower RθJL (20 °C/W vs. ~25 °C/W for SMBJ), improving thermal conduction through leads. The SMBG40A-E3/5B footprint requires updated stencil and placement settings versus SMBJ variants.
What is the reverse leakage current specification for SMBG40A-E3/5B at rated VWM?
At its rated stand-off voltage of 40 V and ambient temperature of 25 °C, the SMBG40A-E3/5B specifies a maximum reverse leakage current (ID) of 1.0 µA. This low leakage ensures minimal power drain in always-on automotive and IoT applications, and preserves signal fidelity in high-impedance sensor interfaces. Leakage remains ≤1.0 µA up to +125 °C, verified per the Vishay SMBG5.0A–SMBG188CA datasheet revision 09-Jan-2024.
Can SMBG40A-E3/5B be used in bidirectional configurations?
No, SMBG40A-E3/5B is a unidirectional TVS diode, indicated by the "A" suffix and cathode band marking. Bidirectional variants carry the "CA" suffix (e.g., SMBG40CA). Using SMBG40A-E3/5B in bidirectional AC or differential signal paths would result in forward conduction during negative half-cycles, causing failure. For bidirectional protection, select SMBG40CA-E3/5B or equivalent, which provides symmetrical clamping in both polarities.
SMBG40A-E3/5B 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):
- 40V
- Voltage - Breakdown (Min):
- 44.4V
- Voltage - Clamping (Max) @ Ipp:
- 64.5V
- Current - Peak Pulse (10/1000µs):
- 9.3A
- 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)
SMBG40A-E3/5B FAQ
1.How can I place an order for SMBG40A-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40A-E3/5B 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 SMBG40A-E3/5B reliable?
The price and inventory of SMBG40A-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40A-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBG40A-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40A-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40A-E3/5B?
SMBG40A-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40A-E3/5B 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 SMBG40A-E3/5B?
For technical support, including SMBG40A-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40A-E3/5B requirements.
6.How does Aetrix verify that SMBG40A-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG40A-E3/5B 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 SMBG40A-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBG40A-E3/5B?
All SMBG40A-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40A-E3/5B, 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 SMBG40A-E3/5B part is unused and in its original packaging.
Return procedure for SMBG40A-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40A-E3/5B Tags
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