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Vishay General Semiconductor - Diodes Division SMBG40AHE3/5B
- Part No.:
- SMBG40AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40AHE3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,604
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Product details
Overview
SMBG40AHE3/5B 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 a 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 use.
For engineers reviewing the SMBG40AHE3/5B datasheet, SMBG40AHE3/5B pinout, SMBG40AHE3/5B application, or SMBG40AHE3/5B equivalent, key selection criteria include unidirectional polarity, 64.5 V clamping performance under 10/1000 µs surge, thermal resistance (RθJA = 100 °C/W), TJ max = 150 °C, and RoHS-compliant, AEC-Q101-qualified construction in SMBG package.
Technical Context
This TVS diode operates as a clamping device that remains high-impedance below 40 V and rapidly switches to low-impedance conduction above its 44.4–49.1 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced transients, and inductive switching spikes.
Designed for surface-mount automated assembly, it uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets MSL Level 1 (peak reflow 260 °C). The SMBG (DO-215AA) case provides UL 94 V-0 flammability rating and supports 100 A non-repetitive forward surge current (8.3 ms half-sine).
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 defining turn-on threshold tolerance |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage during 600 W 10/1000 µs surge, critical for downstream IC survivability |
| PPPM | 600 W - Peak pulse power handling capability under standardized transient waveform |
| IFSM | 100 A - Non-repetitive forward surge current rating (8.3 ms half-sine), supports high-energy load dump events |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Qualification | AEC-Q101 qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, low-profile case with cathode band marking on unidirectional devices. Dimensions: 6.48 mm × 3.94 mm × 2.41 mm (L × W × H), 0.255" × 0.155" × 0.095". Mounting requires 5.0 mm × 5.0 mm copper pads per terminal per datasheet fig. 2.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point in forward bias; connected to protected line's lower-potential side | Enables clamping to ground when transient exceeds VBR; must be routed with low-inductance path to GND plane |
| Cathode | Current exit point in forward bias; marked by band; connected to system ground or reference rail | Defines unidirectional polarity; determines clamping direction-critical for correct placement on PCB |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, body electronics, and ADAS sensors |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as ISO 7637-2 Pulse 5a (load dump) without degradation |
| Glass passivated chip junction | Ensures stable leakage (<1.0 µA at 40 V), long-term reliability, and resistance to humidity/moisture ingress |
| MSL Level 1, 260 °C peak reflow | Compatible with standard lead-free SMT reflow profiles without preconditioning or special handling |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for automotive and industrial end-equipment safety certifications |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs against load dump transients up to 60 V and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional clamping TVS placed between power input and chassis ground to limit voltage excursion. Use Value: Clamps to 64.5 V at 9.3 A, ensuring downstream regulators and microcontrollers remain within absolute maximum ratings during 600 W surges. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in factory automation PLC modules. IC Role / Device Role / Timing Role: Signal-line TVS on 4–20 mA or 0–10 V output paths exposed to field wiring ESD and inductive coupling. Use Value: Sub-1 ns response and <1.0 µA leakage at 40 V preserve signal integrity while suppressing ±8 kV contact ESD per IEC 61000-4-2. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Protection |
Use Scenario: Secondary-side overvoltage protection in AC/DC adapters powering USB-C PD or PoE-powered devices. IC Role / Device Role / Timing Role: Standoff-rated TVS on +5 V/+9 V/+12 V output rails to absorb flyback spikes and hot-plug transients. Use Value: 40 V VWM allows safe operation across common adapter output tolerances; 64.5 V clamping prevents latch-up in connected SoCs. | Use Scenario: DC power feed protection in remote radio units (RRUs) and base station power distribution boards. IC Role / Device Role / Timing Role: Primary overvoltage clamp on -48 V telecom supply lines subject to lightning-induced surges and grounding faults. Use Value: 100 A IFSM rating handles sustained overcurrent events; AEC-Q101 qualification ensures reliability in harsh outdoor environments. |
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-E3/5B | Same VWM (40 V), but lower PPPM = 600 W (identical), higher VC = 64.5 V (same), yet rated only to TJ = 150 °C without AEC-Q101 | Not qualified for automotive; suitable for industrial/commercial designs where qualification is not mandated | Select SMBJ40A-E3/5B only if AEC-Q101 is unnecessary and cost optimization is prioritized |
| 1.5SMC40AHE3/A | Same VWM/VBR/VC, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm), RθJA = 30 °C/W (vs. 100 °C/W), and same AEC-Q101 qualification | Better thermal dissipation enables higher duty-cycle surge handling; requires larger PCB footprint | Choose 1.5SMC40AHE3/A when board layout allows larger package and enhanced thermal margin is required |
Compared with SMBJ40A-E3/5B, SMBG40AHE3/5B adds AEC-Q101 qualification without sacrificing clamping performance; versus 1.5SMC40AHE3/A, it trades thermal margin for space-constrained layouts-making it optimal for compact automotive modules where qualification and size are both critical.
Availability
SMBG40AHE3/5B is available at Aetrix Electronics and suitable for automotive electronic control units, industrial sensor interfaces, and telecom power feeders requiring stable component supply, AEC-Q101 compliance, and compact SMBG packaging.
Supply support for SMBG40AHE3/5B 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, precision, and automotive-grade validation.
The SMBG series was developed specifically for space-constrained, high-reliability transient suppression in automotive and industrial systems-balancing low profile, AEC-Q101 qualification, and 600 W surge capability in DO-215AA outline.
FAQ
What is the clamping voltage of SMBG40AHE3/5B and how is it measured?
The SMBG40AHE3/5B has a maximum clamping voltage (VC) of 64.5 V, measured at a peak pulse current (IPPM) of 9.3 A using the standardized 10/1000 µs double-exponential surge waveform. This value is guaranteed per datasheet Table on page 2 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBG40AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG40AHE3/5B suitable for automotive applications?
Yes, SMBG40AHE3/5B is explicitly AEC-Q101 qualified, as confirmed in the "Mechanical Data" section and "Ordering Information" notes of the Vishay document 88456. Its qualification covers stress tests including temperature cycling, high-temperature reverse bias (HTRB), and ESD-making it approved for use in engine control units, body control modules, and ADAS sensors. The "HE3" suffix denotes AEC-Q101 compliance.
What does the "5B" suffix mean in SMBG40AHE3/5B?
The "5B" suffix in SMBG40AHE3/5B indicates the packaging configuration: 13-inch diameter plastic tape and reel, with a base quantity of 3200 units per reel. This differs from "52", which denotes 7-inch reels with 750 units. Both share identical electrical and mechanical specifications-the "5B" variant is optimized for high-volume SMT production lines requiring longer reel lengths.
How does SMBG40AHE3/5B differ from bidirectional TVS diodes like SMBG40CA?
SMBG40AHE3/5B is unidirectional and features a cathode band marking; it conducts only in reverse bias above VBR, making it ideal for DC rail protection to ground. In contrast, SMBG40CA is bidirectional, symmetrical, and lacks polarity marking-used for AC line or differential signal protection. Their VBR ranges differ slightly (SMBG40A: 44.4–49.1 V; SMBG40CA: 44.4–49.1 V bidirectional), but clamping behavior and application topology are fundamentally distinct.
What is the thermal resistance of SMBG40AHE3/5B and why does it matter?
The SMBG40AHE3/5B has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 5.0 mm × 5.0 mm copper pads per terminal. This value directly impacts power derating: at 75 °C ambient, its usable pulse power drops to ~400 W (per Fig. 2). Designers must account for this in thermally dense layouts-especially in automotive under-hood applications where ambient temperatures exceed 85 °C.
SMBG40AHE3/5B 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG40AHE3/5B FAQ
1.How can I place an order for SMBG40AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40AHE3/5B 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 SMBG40AHE3/5B reliable?
The price and inventory of SMBG40AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG40AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40AHE3/5B?
SMBG40AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40AHE3/5B 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 SMBG40AHE3/5B?
For technical support, including SMBG40AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40AHE3/5B requirements.
6.How does Aetrix verify that SMBG40AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG40AHE3/5B 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 SMBG40AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG40AHE3/5B?
All SMBG40AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40AHE3/5B, 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 SMBG40AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG40AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40AHE3/5B Tags
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