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Vishay General Semiconductor - Diodes Division SMBG40HE3/52
- Part No.:
- SMBG40HE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40HE3/52.pdf
- Description:
- TVS DIODE 40VWM 71.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,288
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Product details
Overview
SMBG40HE3/52 from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in the SMBG package, designed for robust overvoltage protection of sensitive electronics. 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 AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40HE3/52 datasheet, SMBG40HE3/52 pinout, SMBG40HE3/52 application, or SMBG40HE3/52 equivalent, key selection criteria include unidirectional surge clamping performance, DO-215AA (SMBG) surface-mount compatibility, RoHS-compliant AEC-Q101 qualification, thermal resistance (RθJA = 100 °C/W), and 100 A IFSM surge current rating.
Technical Context
This TVS diode operates as a clamping-type overvoltage protector, leveraging an avalanche breakdown mechanism to limit transient voltages across protected lines. Its unidirectional polarity enables integration into DC-biased circuits such as power rails and signal paths where reverse conduction must be blocked.
The device is rated for 600 W peak pulse power under standardized 10/1000 µs waveform conditions, with a maximum clamping voltage of 64.5 V at 9.3 A IPPM. Thermal design is supported by RθJA = 100 °C/W and RθJL = 20 °C/W, and it sustains operation from –55 °C to +150 °C junction temperature.
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 - Confirmed breakdown range ensuring reliable turn-on during transients |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage level protecting downstream ICs from overshoot beyond safe limits |
| PPPM | 600 W - Peak pulse power handling capability per 10/1000 µs waveform, critical for lightning/surge immunity |
| IFSM | 100 A - Single half-sine surge current rating (8.3 ms), supporting high-energy inductive load switching events |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive and industrial environments |
| Qualification | AEC-Q101 qualified - Validated for automotive electronic systems requiring zero-failure reliability |
Pinout & Package
Package: DO-215AA (SMBG), surface-mount gull-wing leaded case with matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102; polarity indicated by cathode band on the marked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry point in normal conduction mode | Connected to lower-potential side (e.g., ground or return path) in unidirectional protection configuration |
| Cathode | Avalanche clamping node during reverse overvoltage | Connected to protected line (e.g., 40 V rail); band marking identifies this terminal for correct PCB orientation |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 Level 4 surge immunity requirements for industrial and automotive interfaces |
| AEC-Q101 qualification | Validates long-term reliability under thermal cycling, humidity, and mechanical stress for automotive ECUs and ADAS modules |
| Glass passivated chip junction | Ensures stable electrical characteristics and low leakage (<1 µA at VWM) over lifetime and temperature extremes |
| Low incremental surge resistance | Minimizes voltage overshoot during fast transients, improving protection margin for 3.3 V/5 V logic and MOSFET gate drivers |
| MSL Level 1 (260 °C peak reflow) | Supports standard lead-free SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 40 V battery-supplied control modules (e.g., body control units, lighting drivers) against load dump and alternator transients. IC Role / Device Role: Unidirectional clamping TVS placed between power rail and ground to shunt surge energy away from downstream regulators and microcontrollers. Use Value: Withstands 100 A IFSM and clamps to ≤64.5 V, preventing damage to 48 V tolerant components while meeting ISO 7637-2 Pulse 5a requirements. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC I/O modules exposed to ESD and inductive switching noise. IC Role / Device Role: Point-of-entry TVS on signal lines referenced to local ground, suppressing fast transients before they reach precision ADC front-ends. Use Value: Low clamping voltage (64.5 V) and fast response ensure signal integrity remains intact; AEC-Q101 grade supports extended field life in harsh environments. |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
|
Use Scenario: Input-side protection for isolated 40 V input DC-DC converters used in railway signaling and telecom remote radio units. IC Role / Device Role: Primary overvoltage clamp on the primary-side bus, coordinated with upstream fusing to clear sustained overvoltages. Use Value: 600 W pulse rating handles repetitive surges from nearby lightning strikes; DO-215AA footprint allows compact layout adjacent to connector entry points. |
Use Scenario: Secondary-side transient suppression on 48 V telecom power distribution boards subject to induced surges from nearby AC mains or antenna coupling. IC Role / Device Role: Standoff-rated TVS placed across output rails to maintain regulated voltage during transient events without affecting steady-state regulation. Use Value: 40 V VWM ensures no leakage or conduction during nominal operation; 150 °C TJ max supports operation in sealed, high-temperature enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40AHE3/52 | Same VWM (40 V), identical DO-215AB (SMB) package, but lower PPPM (400 W vs. 600 W) and higher VC (69.4 V vs. 64.5 V) | Limited to less severe surge environments; not recommended where IEC 61000-4-5 Level 4 compliance is required | Select SMBG40HE3/52 when higher pulse power headroom and tighter clamping are needed for mission-critical protection |
| SMCJ40AHE3/52 | Same VWM and VBR, but larger DO-214AB (SMC) package, higher PPPM (1500 W), and lower VC (64.3 V) | Requires more PCB area; better suited for high-energy industrial motor drives where space permits | Choose SMBG40HE3/52 for space-constrained automotive modules where SMBG footprint and AEC-Q101 grade are mandatory |
Compared with SMBJ40AHE3/52 and SMCJ40AHE3/52, the SMBG40HE3/52 delivers optimal balance of 600 W surge capacity, AEC-Q101 qualification, and compact DO-215AA packaging-making it the preferred choice for automotive and space-limited industrial designs requiring certified reliability.
Availability
SMBG40HE3/52 is available at Aetrix Electronics and suitable for automotive control units, industrial sensor interfaces, DC-DC converter inputs, and telecom power supply surge suppression requiring stable component supply and long-term lifecycle support.
Supply support for SMBG40HE3/52 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 high-reliability diodes, MOSFETs, optoelectronics, and passive components for automotive, industrial, and computing markets.
The SMBG series was developed specifically for AEC-Q101-compliant surface-mount transient suppression in space-constrained automotive and industrial power systems, emphasizing robustness, repeatable clamping, and manufacturability.
FAQ
What is the polarity configuration of SMBG40HE3/52?
The SMBG40HE3/52 is a unidirectional transient voltage suppressor diode, meaning it conducts only in reverse bias during overvoltage events. The cathode is marked by a band on the package body, and the anode connects to ground or the lower-potential reference. This configuration blocks reverse current during normal operation while providing precise clamping above VBR. The SMBG40HE3/52 does not conduct in forward direction under surge conditions.
Does SMBG40HE3/52 meet automotive qualification standards?
Yes, SMBG40HE3/52 is explicitly AEC-Q101 qualified, as confirmed in the Vishay datasheet revision 12-Nov-12 (Document Number: 88456). This qualification covers stress tests including temperature cycling, humidity bias, mechanical shock, and high-temperature operating life-ensuring suitability for under-hood and chassis-mounted automotive electronics. The HE3 suffix denotes AEC-Q101 compliance, distinguishing it from commercial-grade E3 variants.
What is the clamping voltage of SMBG40HE3/52 at its rated peak pulse current?
The SMBG40HE3/52 has a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 9.3 A, measured using the standard 10/1000 µs waveform. This value is guaranteed across temperature and production lots, and defines the upper voltage limit imposed on protected circuitry during surge events. Maintaining VC ≤ 64.5 V ensures compatibility with 48 V tolerant components downstream of the SMBG40HE3/52.
How does SMBG40HE3/52 differ from SMBJ40AHE3/52 in terms of surge capability?
The SMBG40HE3/52 offers 600 W peak pulse power (PPPM) versus 400 W for SMBJ40AHE3/52, with a lower clamping voltage of 64.5 V compared to 69.4 V at rated IPPM. Both share the same 40 V VWM and AEC-Q101 qualification, but the SMBG40HE3/52's higher energy handling and tighter clamping make it suitable for more demanding surge environments like ISO 7637-2 Pulse 5a testing. The SMBG40HE3/52 uses DO-215AA, while SMBJ40AHE3/52 uses DO-214AA.
What is the maximum operating junction temperature for SMBG40HE3/52?
The SMBG40HE3/52 has a maximum operating junction temperature (TJ) of +150 °C, as specified in the Vishay datasheet. This rating enables reliable operation in high-ambient environments such as engine compartments, industrial motor controls, and sealed telecom enclosures. Derating curves in Figure 2 confirm usable power dissipation down to 50% at 125 °C ambient, supporting robust thermal design when mounted on 5.0 mm × 5.0 mm copper pads per terminal.
SMBG40HE3/52 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG40HE3/52 FAQ
1.How can I place an order for SMBG40HE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40HE3/52 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 SMBG40HE3/52 reliable?
The price and inventory of SMBG40HE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40HE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40HE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40HE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40HE3/52?
SMBG40HE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40HE3/52 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 SMBG40HE3/52?
For technical support, including SMBG40HE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40HE3/52 requirements.
6.How does Aetrix verify that SMBG40HE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40HE3/52 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 SMBG40HE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40HE3/52?
All SMBG40HE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40HE3/52, 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 SMBG40HE3/52 part is unused and in its original packaging.
Return procedure for SMBG40HE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40HE3/52 Tags
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