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Vishay General Semiconductor - Diodes Division SMBG40A-M3/5B
- Part No.:
- SMBG40A-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40A-M3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,850
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Product details
Overview
SMBG40A-M3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMBG (DO-215AA) package, rated for 40 V stand-off voltage, 64.5 V maximum clamping voltage at 9.3 A peak pulse current, and 600 W peak pulse power with 10/1000 μs waveform. It protects MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics against inductive switching transients.
For engineers reviewing the SMBG40A-M3/5B datasheet, SMBG40A-M3/5B pinout, SMBG40A-M3/5B application, or SMBG40A-M3/5B equivalent, key selection criteria include unidirectional polarity, 40 V VWM, 64.5 V VC at IPPM, AEC-Q101 qualification, and halogen-free RoHS compliance per M3 suffix.
Technical Context
This TVS diode operates as a shunt-clamping device that remains high-impedance below 40 V and rapidly avalanches to limit transient overvoltages above its breakdown threshold of 44.4–49.1 V at 1 mA test current. Its glass-passivated junction ensures stable leakage and fast response time under ESD and surge events.
Designed for surface-mount automated assembly, it meets MSL level 1 (260 °C peak reflow), supports 100 A non-repetitive forward surge current (8.3 ms half-sine), and delivers low incremental surge resistance for effective energy diversion without thermal runaway.
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 - Breakdown occurs within this range at 1 mA, defining turn-on threshold |
| VC @ IPPM | 64.5 V - Clamped voltage seen by protected circuit during 9.3 A 10/1000 μs surge |
| PPPM | 600 W - Peak transient power dissipation capability under standardized surge waveform |
| IPPM | 9.3 A - Maximum non-repetitive peak pulse current supported at VC |
| TJ max | +150 °C - Maximum junction temperature enabling operation in under-hood automotive environments |
| Package | SMBG (DO-215AA) - Low-profile SMD outline with 0.235" × 0.130" footprint and gull-wing leads |
Pinout & Package
SMBG40A-M3/5B uses the SMBG (DO-215AA) surface-mount package: 2-terminal gull-wing configuration with cathode band marking on one end; terminals are matte tin-plated for J-STD-002 solderability and JESD22-B102 whisker resistance (Class 2).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection point for unidirectional clamping path | Connected to protected line; avalanche conduction occurs from cathode to anode when VWM exceeded |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane to complete clamping loop |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and surge stress per JEDEC standard |
| Halogen-free & RoHS compliant (M3) | Meets environmental compliance requirements for industrial and automotive PCB assemblies without brominated flame retardants |
| 600 W peak pulse power (10/1000 μs) | Handles high-energy transients common in 12 V/24 V vehicle power systems and industrial motor drives |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes overvoltage stress on downstream ICs compared to higher-ratio suppressors |
| MSL Level 1 (260 °C) | Compatible with standard lead-free reflow profiles without preconditioning or special handling |
Applications
| Automotive Power Distribution | Industrial Motor Drive Control |
|---|---|
Use Scenario: Protection of gate drivers and microcontrollers in 12 V/24 V battery-fed fuse boxes and junction modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed across power input rails to clamp load-dump spikes up to ISO 7637-2 Pulse 5a. Use Value: Limits transient voltage to ≤64.5 V, preventing latch-up or oxide rupture in 3.3 V/5 V logic interfaces downstream. | Use Scenario: Input protection for PLC digital I/O modules exposed to relay coil back-EMF and contact arcing. IC Role / Device Role / Timing Role: Shunt-connected TVS on 24 V DC supply lines feeding optocoupler inputs and level-shifting circuits. Use Value: Absorbs 600 W surges without degradation, maintaining signal integrity during frequent switching cycles in factory automation. |
| Automotive Sensor Signal Lines | Telecom Power Interface |
Use Scenario: ESD and surge protection for LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) in engine control units. IC Role / Device Role / Timing Role: Low-capacitance unidirectional TVS placed at connector entry points to suppress fast transients while preserving signal rise time. Use Value: Clamps ±30 kV ESD (IEC 61000-4-2) and 10/1000 μs surges to safe levels without distorting sub-1 MHz sensor signals. | Use Scenario: Primary overvoltage protection on -48 V DC telecom power feeds entering base station equipment. IC Role / Device Role / Timing Role: Standoff-rated TVS installed upstream of DC/DC converters to prevent catastrophic failure during lightning-induced surges. Use Value: Withstands repetitive 600 W pulses at 0.01% duty cycle, ensuring long-term reliability in outdoor telecom infrastructure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40A-M3/5B | Same VWM (40 V), but lower PPPM = 600 W (same rating), identical SMB package; differs in thermal resistance (RθJA = 100 °C/W vs. SMBJ's 85 °C/W) and slightly higher VC (69.4 V) | Less margin for high-temperature ambient operation due to higher thermal resistance; suitable where board layout allows larger copper area | Select SMBG40A-M3/5B when tighter clamping (64.5 V vs. 69.4 V) and AEC-Q101 qualification are required. |
| SMCJ40A-M3/5B | Higher PPPM = 1500 W, same VWM and VBR, but larger SMC (DO-214AB) package (0.315" × 0.220") and higher IPPM (33.5 A) | Used where higher surge endurance is needed (e.g., alternator load dump), but requires more PCB area and may not fit space-constrained automotive modules | Choose SMBG40A-M3/5B for compact layouts where 600 W suffices and AEC-Q101 compliance is mandatory. |
Compared with SMBJ40A-M3/5B and SMCJ40A-M3/5B, SMBG40A-M3/5B offers the tightest clamping voltage (64.5 V), smallest footprint (SMBG), and automotive-qualified reliability-making it optimal for space-limited, high-reliability 12 V/24 V systems requiring precise overvoltage limiting.
Availability
SMBG40A-M3/5B is available at Aetrix Electronics and suitable for automotive power distribution, industrial motor drive control, automotive sensor signal lines, and telecom power interface applications requiring stable component supply, AEC-Q101 validation, and halogen-free compliance.
Supply support for SMBG40A-M3/5B 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, TVS devices, and MOSFETs for high-reliability industrial and automotive applications.
The SMBG series was developed specifically for surface-mount transient suppression in space-constrained, high-surge environments-emphasizing low-profile packaging, AEC-Q101 qualification, and consistent clamping performance across temperature.
FAQ
What is the maximum clamping voltage of SMBG40A-M3/5B at its rated peak pulse current?
The SMBG40A-M3/5B has a maximum clamping voltage (VC) of 64.5 V at its specified peak pulse current (IPPM) of 9.3 A, measured using the 10/1000 μs standard waveform. This value ensures protected circuits remain below critical overvoltage thresholds during surge events. The SMBG40A-M3/5B achieves this with low incremental surge resistance and stable avalanche characteristics across its operating temperature range.
Is SMBG40A-M3/5B qualified for automotive applications?
Yes, SMBG40A-M3/5B is AEC-Q101 qualified, having passed stress tests including temperature cycling, high-temperature reverse bias (HTRB), and surge robustness per JEDEC standards. Its M3 suffix confirms halogen-free, RoHS-compliant construction suitable for automotive ECUs, body control modules, and sensor interfaces. The SMBG40A-M3/5B is explicitly listed in Vishay's AEC-Q101 qualified product documentation.
What does the "M3" suffix indicate in SMBG40A-M3/5B?
The "M3" suffix in SMBG40A-M3/5B denotes halogen-free, RoHS-compliant construction with industrial-grade reliability and JESD201 Class 2 whisker resistance. It also indicates matte tin-plated leads meeting J-STD-002 solderability requirements. Unlike "E3", M3 excludes brominated flame retardants-critical for automotive and green manufacturing compliance. The SMBG40A-M3/5B maintains full electrical equivalence to E3 variants except for material composition.
What is the standoff voltage rating of SMBG40A-M3/5B?
The standoff voltage (VWM) of SMBG40A-M3/5B is 40 V-this is the maximum DC or continuous reverse voltage the device can withstand without entering avalanche conduction. It is selected to match nominal 36 V automotive systems and 24 V industrial rails while providing margin above normal operating voltage. The SMBG40A-M3/5B remains fully blocking below this threshold with leakage <1.0 μA at 40 V.
How does SMBG40A-M3/5B differ from bidirectional TVS diodes like SMBG40CA-M3/5B?
SMBG40A-M3/5B is unidirectional and features a cathode band for polarity-sensitive placement, while SMBG40CA-M3/5B is bidirectional with no polarity marking and symmetrical clamping in both directions. The SMBG40A-M3/5B has lower leakage (<1.0 μA at VWM) and is optimized for DC rail protection; SMBG40CA-M3/5B suits AC-coupled or floating signal lines. Their breakdown voltages differ: SMBG40A-M3/5B specifies VBR = 44.4–49.1 V, whereas SMBG40CA-M3/5B has matched positive/negative VBR.
SMBG40A-M3/5B 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:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBG)
SMBG40A-M3/5B FAQ
1.How can I place an order for SMBG40A-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40A-M3/5B 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-M3/5B reliable?
The price and inventory of SMBG40A-M3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40A-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG40A-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40A-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40A-M3/5B?
SMBG40A-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40A-M3/5B 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-M3/5B?
For technical support, including SMBG40A-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40A-M3/5B requirements.
6.How does Aetrix verify that SMBG40A-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG40A-M3/5B 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-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG40A-M3/5B?
All SMBG40A-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40A-M3/5B, 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-M3/5B part is unused and in its original packaging.
Return procedure for SMBG40A-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40A-M3/5B Tags
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