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Vishay General Semiconductor - Diodes Division SMBG40AHE3/52
- Part No.:
- SMBG40AHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40AHE3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:7,010
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Product details
Overview
SMBG40AHE3/52 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 SMBG40AHE3/52 datasheet, SMBG40AHE3/52 pinout, SMBG40AHE3/52 application, or SMBG40AHE3/52 equivalent, key selection criteria include unidirectional polarity, 64.5 V max clamping under 9.3 A surge, 1.0 μA max reverse leakage at 40 V, 100 A IFSM surge rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below VWM = 40 V and rapidly avalanches above VBR (min 44.4 V) to limit transient voltages. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response (<1 ns) to ESD and lightning-induced surges.
The SMBG40AHE3/52 is rated for 600 W peak pulse power per 10/1000 μs waveform at 0.01% duty cycle, with thermal resistance RθJA = 100 °C/W and RθJL = 20 °C/W. It supports operating junction temperatures from –55 °C to +150 °C and meets J-STD-020 MSL Level 1 (260 °C peak reflow).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse working voltage before clamping begins |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Ensures reliable avalanche initiation within defined tolerance band |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage during 600 W transient, limiting downstream IC stress |
| IPPM | 9.3 A - Peak pulse current capability under standardized 10/1000 μs surge waveform |
| IDR @ VWM | 1.0 μA - Ultra-low leakage preserves power rail integrity in battery-sensitive systems |
| TJ range | –55 °C to +150 °C - Enables deployment in under-hood automotive and industrial environments |
| Package | SMBG (DO-215AA) - Surface-mount outline with 0.235" × 0.255" footprint and gull-wing leads |
Pinout & Package
Package: SMBG (DO-215AA), molded case with matte tin-plated gull-wing terminals, UL 94 V-0 compliant compound, cathode indicated by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or low-potential node; completes clamping path during transients |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 40 V supply rail); band-marked end accepts positive surge energy |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive electronics per stress test requirements including HTGB, HTRB, and temperature cycling |
| Glass passivated junction | Ensures stable VBR tolerance and long-term reliability under repeated surge events |
| 600 W peak pulse power | Withstands IEC 61000-4-5 Level 4 (4 kV) surges when mounted on 5.0 mm × 5.0 mm copper pads |
| MSL Level 1 | Compatible with standard SMT reflow profiles up to 260 °C peak without preconditioning |
| RoHS & halogen-free option | HE3 suffix denotes RoHS-compliant, AEC-Q101-qualified version with no restricted substances |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 42 V battery-supplied ECUs against load dump transients (ISO 7637-2 Pulse 5a). IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between battery rail and ground, clamping spikes >64.5 V within nanoseconds. Use Value: Limits voltage seen by downstream PMICs and microcontrollers to safe levels while surviving 100 A surge (IFSM). | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Low-leakage (1.0 μA) TVS on 24 V signal lines, placed adjacent to connector entry point. Use Value: Prevents false triggering or latch-up in precision ADC front-ends during EFT bursts (IEC 61000-4-4). |
| Telecom DC Power Input Protection | Consumer USB-C Power Delivery Line |
Use Scenario: Guarding 48 V PoE+ (IEEE 802.3at) inputs in network switches against induced lightning surges. IC Role / Device Role / Timing Role: Primary clamping device on DC input, coordinated with upstream fuse and common-mode chokes. Use Value: Absorbs 600 W transients without degradation, maintaining system uptime in outdoor telecom cabinets. | Use Scenario: Secondary overvoltage clamp on 20 V USB-C PD bus in portable docking stations. IC Role / Device Role / Timing Role: Fast-response TVS placed after buck converter output to protect Type-C controller and port logic. Use Value: Clamps fault conditions to ≤64.5 V before internal MOSFETs exceed VDS(max), preventing catastrophic failure. |
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), but lower PPPM (600 W vs. SMBJ's 600 W), identical VC (64.5 V), same SMB package | No AEC-Q101 qualification; intended for industrial/commercial use only | Select SMBJ40A-E3/52 if automotive qualification is not required and cost optimization is prioritized |
| SMCJ40AHE3/52 | Higher PPPM (1500 W), larger SMC (DO-214AB) package, same VWM/VC, AEC-Q101 qualified | Requires larger PCB area and higher thermal mass; suited for higher-energy surge environments | Choose SMCJ40AHE3/52 when system-level surge testing exceeds IEC 61000-4-5 Level 4 or requires extended surge endurance |
Compared with SMBJ40A-E3/52 and SMCJ40AHE3/52, SMBG40AHE3/52 uniquely balances AEC-Q101 compliance, compact SMBG footprint, and 600 W surge capability-making it optimal for space-constrained automotive modules where qualification and size are both critical.
Availability
SMBG40AHE3/52 is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor nodes, telecom power supplies, and USB-C PD systems requiring stable component supply across multi-year production cycles.
Supply support for SMBG40AHE3/52 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, efficiency, and application-specific performance.
The SMBG series was engineered for high-reliability surface-mount transient suppression in automotive and industrial environments, combining AEC-Q101 validation, low-profile packaging, and precise clamping performance.
FAQ
What is the maximum clamping voltage of SMBG40AHE3/52 under surge conditions?
The SMBG40AHE3/52 has a maximum clamping voltage (VC) of 64.5 V at 9.3 A peak pulse current (IPPM) under the standardized 10/1000 μs waveform. This value is measured per JEDEC standards and defines the upper voltage limit imposed on protected circuits during transient events. The SMBG40AHE3/52 maintains this clamping performance across its full operating temperature range (–55 °C to +150 °C).
Is SMBG40AHE3/52 suitable for automotive applications?
Yes, SMBG40AHE3/52 is AEC-Q101 qualified and specifically designed for automotive use. Its qualification covers high-temperature operating life, humidity bias, and mechanical shock testing per automotive reliability standards. The HE3 suffix confirms RoHS compliance and AEC-Q101 validation, making SMBG40AHE3/52 appropriate for engine control units, body electronics, and ADAS power domains.
What is the reverse leakage current specification for SMBG40AHE3/52 at rated VWM?
At its rated stand-off voltage of 40 V (VWM), the SMBG40AHE3/52 exhibits a maximum reverse leakage current (IDR) of 1.0 μA at 25 °C. This ultra-low leakage ensures minimal power loss in always-on automotive subsystems and preserves accuracy in high-impedance sensor interfaces. Leakage remains below 5.0 μA across the full –55 °C to +125 °C operating range.
Does SMBG40AHE3/52 have a bidirectional variant?
No, SMBG40AHE3/52 is a unidirectional TVS diode. Bidirectional variants in the same SMBG family carry the "CA" suffix (e.g., SMBG40CA). The "A" suffix in SMBG40AHE3/52 explicitly denotes unidirectional polarity, with cathode marked by a band. For AC-coupled or differential signal protection, engineers must select the corresponding CA part or implement dual unidirectional configurations.
What is the recommended PCB pad layout for SMBG40AHE3/52 to achieve rated 600 W pulse power?
To achieve the full 600 W peak pulse power rating, SMBG40AHE3/52 must be mounted on minimum 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, per Vishay's datasheet Fig. 2 and note (2). These pads provide necessary thermal dissipation and current spreading. Smaller pads reduce surge capability proportionally; for example, 0.1" × 0.1" pads derate PPPM to ~300 W. Thermal vias under pads further improve sustained surge handling.
SMBG40AHE3/52 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:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG40AHE3/52 FAQ
1.How can I place an order for SMBG40AHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40AHE3/52 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 SMBG40AHE3/52 reliable?
The price and inventory of SMBG40AHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40AHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40AHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40AHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40AHE3/52?
SMBG40AHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40AHE3/52 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 SMBG40AHE3/52?
For technical support, including SMBG40AHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40AHE3/52 requirements.
6.How does Aetrix verify that SMBG40AHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40AHE3/52 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 SMBG40AHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40AHE3/52?
All SMBG40AHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40AHE3/52, 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 SMBG40AHE3/52 part is unused and in its original packaging.
Return procedure for SMBG40AHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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