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Vishay General Semiconductor - Diodes Division SMBG40CA-M3/5B
- Part No.:
- SMBG40CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40CA-M3/5B.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG40CA-M3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection on signal and power lines. It features 40 V stand-off voltage (VWM), 600 W peak pulse power (10/1000 μs), clamping voltage of 64.5 V at 9.3 A peak pulse current, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG40CA-M3/5B datasheet, SMBG40CA-M3/5B pinout, SMBG40CA-M3/5B application, or SMBG40CA-M3/5B equivalent, key selection criteria include bidirectional clamping behavior, low leakage (<1.0 μA at 40 V), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates symmetrically in both polarities, enabling protection against voltage transients of either polarity without requiring polarity awareness in circuit layout. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the DO-215AA package supports high thermal dissipation (RθJA = 100 °C/W) under repetitive surge conditions.
The device meets ANSI/IEEE C62.35 standards for surge suppression and delivers fast response time (<1 ns) to clamp ESD and lightning-induced surges. It is rated for operation from −55 °C to +150 °C junction temperature and supports surge currents up to 9.3 A (10/1000 μs) with no degradation when mounted per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Verified breakdown threshold range ensures consistent turn-on across production lots. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamped voltage during 600 W transient; determines maximum stress imposed on protected IC or MOSFET. |
| IPPM | 9.3 A - Peak pulse current capability with 10/1000 μs waveform; defines surge energy handling limit per event. |
| ID @ VWM | <1.0 μA - Reverse leakage at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive and industrial environments. |
| Package | SMBG (DO-215AA) - Surface-mount package with 2.16 mm height and 6.48 mm body length; optimized for automated pick-and-place and reflow soldering. |
Pinout & Package
Two-terminal bidirectional device in SMBG (DO-215AA) package; no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102, with MSL Level 1 rating (peak reflow 260 °C).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Transient conduction path | Identical terminals; conducts equally in both directions above VBR, eliminating need for orientation during placement. |
| Case (cathode band absent) | Non-functional marking | No band or marking - confirms bidirectional configuration; distinguishes from unidirectional variants like SMBG40A. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and ADAS sensor interfaces requiring zero-failure reliability. |
| 600 W peak pulse power (10/1000 μs) | Withstands IEC 61000-4-5 Level 4 surges (4 kV line-to-line) without degradation when properly mounted. |
| Halogen-free, RoHS compliant (M3 suffix) | Meets IPC-J-STD-709D material requirements and supports environmentally regulated supply chains. |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., ISO 7637-2 pulse 1/2a), improving protection margin for downstream ICs. |
| MSL Level 1, 260 °C peak reflow | Enables standard lead-free reflow profiles without baking or special handling prior to assembly. |
Applications
| Automotive Sensor Protection | Industrial CAN Bus Interface |
|---|---|
Use Scenario: Protecting LIN/CAN transceivers and MEMS pressure sensors in engine bay modules exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across differential bus lines or between signal line and ground. Use Value: Maintains signal integrity during 100 V/50 ms load dump events while limiting clamped voltage to ≤64.5 V, preventing damage to 5 V or 3.3 V transceivers. | Use Scenario: Shielding RS-485/CAN FD physical layer ICs in factory automation controllers from EFT and surge coupling via long cable runs. IC Role / Device Role / Timing Role: Primary surge shunt on bus lines (CAN_H/CAN_L), coordinated with common-mode chokes and filtering capacitors. Use Value: Absorbs 600 W transient energy without latch-up, preserving communication uptime and meeting IEC 61000-4-4 (4 kV EFT) and IEC 61000-4-5 (1 kV surge) immunity requirements. |
| Consumer Power Adapter Input Stage | Telecom DSL Line Card Protection |
Use Scenario: Safeguarding AC-DC primary-side controllers and optocouplers in universal input adapters subjected to lightning-induced surges on mains lines. IC Role / Device Role / Timing Role: Secondary-level TVS placed after MOV but before bridge rectifier input, handling residual fast transients missed by bulk suppression. Use Value: Responds in <1 ns to clamp sub-microsecond spikes, reducing stress on 600 V MOSFETs and extending adapter lifetime in tropical grid environments. | Use Scenario: Protecting ADSL/VDSL line drivers and SLICs from induced surges on outdoor copper pairs in central office and DSLAM equipment. IC Role / Device Role / Timing Role: Differential-mode protector bridging tip/ring lines, selected for low capacitance (typ. 150 pF at 0 V) to avoid signal attenuation at 30 MHz. Use Value: Limits peak voltage to 64.5 V during 10/700 μs telecom surges, ensuring compliance with GR-1089-CORE and maintaining bit error rate (BER) under stress. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA | Same VWM (40 V), lower PPPM (600 W vs. SMBJ's 600 W), identical DO-214AA package but larger footprint (7.0 mm × 4.6 mm vs. SMBG's 6.48 mm × 3.94 mm). | Less space-constrained designs; higher thermal mass allows slightly longer surge duration tolerance. | Select SMBG40CA-M3/5B when board area is limited and AEC-Q101 qualification is mandatory; choose SMBJ40CA for legacy layouts or where JEDEC DO-214AA tooling is standardized. |
| SMCJ40CA | Same VWM and bidirectional function, but higher PPPM (1500 W), larger SMC (DO-214AB) package (7.78 mm × 6.22 mm), and higher clamping voltage (69.4 V). | Higher-energy surge environments (e.g., industrial motor drives); requires more PCB real estate and thermal relief. | Choose SMBG40CA-M3/5B for compact automotive modules needing AEC-Q101 and tight layout control; use SMCJ40CA only when 1500 W surge rating is explicitly required and space permits. |
Compared with SMBJ40CA and SMCJ40CA, the SMBG40CA-M3/5B offers the smallest footprint among 40 V bidirectional TVS diodes with AEC-Q101 qualification, delivering optimal board-area efficiency and automotive-grade reliability without sacrificing 600 W surge capability or low-clamp performance.
Availability
SMBG40CA-M3/5B is available at Aetrix Electronics and suitable for automotive sensor modules, industrial CAN networks, and telecom line card designs requiring stable component supply, halogen-free compliance, and AEC-Q101 validation.
Supply support for SMBG40CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, power efficiency, and automotive qualification.
The SMBG series was developed specifically for space-constrained, high-reliability transient suppression in automotive and industrial applications, combining AEC-Q101 validation, halogen-free construction, and DO-215AA packaging for automated manufacturing.
FAQ
What does the "CA" suffix indicate in SMBG40CA-M3/5B?
The "CA" suffix denotes a bidirectional configuration, meaning the SMBG40CA-M3/5B provides symmetrical transient voltage suppression in both polarities. Unlike unidirectional variants (e.g., SMBG40A), it has no cathode marking and clamps equally for positive and negative transients-critical for protecting differential buses like CAN or RS-485 where polarity reversal may occur.
Is SMBG40CA-M3/5B suitable for automotive applications?
Yes, the SMBG40CA-M3/5B is AEC-Q101 qualified and rated for operation from −55 °C to +150 °C, making it suitable for under-hood and chassis-mounted automotive systems. Its halogen-free (M3) construction, MSL Level 1 rating, and validated surge performance align with OEM requirements for engine control units, ADAS camera modules, and body electronics.
What is the clamping voltage of SMBG40CA-M3/5B and why does it matter?
The SMBG40CA-M3/5B has a maximum clamping voltage (VC) of 64.5 V at 9.3 A peak pulse current (10/1000 μs). This value defines the highest voltage imposed on protected circuitry during a surge event; staying well below the breakdown or absolute maximum ratings of downstream ICs (e.g., 75 V-rated CAN transceivers) ensures functional safety and long-term reliability.
How does the SMBG (DO-215AA) package differ from SMB (DO-214AA)?
The SMBG (DO-215AA) package used by SMBG40CA-M3/5B is dimensionally smaller than standard SMB (DO-214AA): 6.48 mm × 3.94 mm vs. 7.0 mm × 4.6 mm, with reduced height (2.16 mm vs. 2.62 mm). This enables tighter board layouts and improved thermal performance per unit area, while maintaining compatibility with existing SMT pick-and-place equipment calibrated for DO-214x footprints.
Does SMBG40CA-M3/5B require orientation during PCB placement?
No, the SMBG40CA-M3/5B is a bidirectional TVS diode with no polarity marking-there is no cathode band or anode indicator on the SMBG (DO-215AA) package. This eliminates orientation dependency during automated placement, reduces assembly errors, and simplifies layout for differential or AC-coupled signal paths where polarity is undefined or alternating.
SMBG40CA-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:
- -
- Bidirectional Channels:
- 1
- 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)
SMBG40CA-M3/5B FAQ
1.How can I place an order for SMBG40CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40CA-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 SMBG40CA-M3/5B reliable?
The price and inventory of SMBG40CA-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 SMBG40CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBG40CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40CA-M3/5B?
SMBG40CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40CA-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 SMBG40CA-M3/5B?
For technical support, including SMBG40CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40CA-M3/5B requirements.
6.How does Aetrix verify that SMBG40CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG40CA-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 SMBG40CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBG40CA-M3/5B?
All SMBG40CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40CA-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 SMBG40CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBG40CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40CA-M3/5B Tags
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