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Vishay General Semiconductor - Diodes Division SMBG40CA-M3/52
- Part No.:
- SMBG40CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG40CA-M3/52.pdf
- Description:
- TVS DIODE 40VWM 64.5VC DO215AA
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SMBG40CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of sensitive electronics. 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 - deployed in automotive sensor signal lines and industrial I/O interfaces.
For engineers reviewing the SMBG40CA-M3/52 datasheet, SMBG40CA-M3/52 pinout, SMBG40CA-M3/52 application, or SMBG40CA-M3/52 equivalent, key selection criteria include bidirectional clamping behavior, 64.5 V max clamping at rated surge current, halogen-free RoHS compliance (M3 suffix), MSL Level 1 rating, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping performance regardless of transient polarity - critical for protecting AC-coupled or differential signal paths. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 μA at VWM), while the low incremental surge resistance enables rapid energy diversion during ESD or lightning-induced surges.
The device is rated for 150 °C maximum junction temperature and exhibits 100 °C/W typical thermal resistance (junction-to-ambient) when mounted per recommended 0.2" × 0.2" copper pad layout. Its 10/1000 μs waveform response supports IEC 61000-4-5 Level 3 surge immunity requirements in automotive and industrial control systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 40 V - Maximum continuous reverse operating voltage before clamping begins; defines safe signal swing range. |
| VBR (min/max) | 44.4 V / 49.1 V at 1 mA - Ensures reliable turn-on above normal operating voltage with tight tolerance for predictable protection threshold. |
| VC @ IPPM | 64.5 V at 9.3 A - Clamping voltage under full 600 W surge; limits downstream IC stress to safe levels. |
| PPPM | 600 W (10/1000 μs) - Peak surge power handling capacity; meets IEC 61000-4-5 surge test requirements. |
| ID @ VWM | <1.0 μA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss. |
| TJ max | +150 °C - Enables operation in under-hood automotive environments and high-temperature industrial enclosures. |
| MSL Level | Level 1 (J-STD-020) - Supports standard reflow without moisture sensitivity concerns; no bake required pre-assembly. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical terminals suitable for AC or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal serves as anode or cathode depending on transient polarity; no band marking required. |
| Case (cathode band absent) | Thermal and mechanical interface | Exposed metal slug provides thermal conduction path to PCB copper; no electrical connection. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, ADAS, and body electronics. |
| Halogen-free, RoHS compliant (M3 suffix) | Meets IPC-1752A material declaration requirements and EU RoHS Directive 2011/65/EU Annex II - supports green manufacturing and export compliance. |
| 600 W peak pulse power (10/1000 μs) | Handles repetitive surge events up to 0.01 % duty cycle without degradation - ideal for industrial motor drive I/O protection. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage overshoot during fast transients - protects 3.3 V/5 V logic and analog front-ends without additional series impedance. |
| Matte tin-plated leads | Ensures solderability per J-STD-002 and JESD22-B102; passes JESD201 Class 2 whisker testing for long-term interconnect reliability. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN, LIN, or analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional clamping element placed directly at connector entry point to shunt surge energy before reaching signal conditioning circuitry. Use Value: Withstands 600 W surges while clamping to 64.5 V - prevents latch-up or gate oxide damage in downstream op-amps and microcontrollers. |
Use Scenario: Shielding 24 V digital input modules in programmable logic controllers from inductive kickback and field wiring transients. IC Role / Device Role / Timing Role: Primary overvoltage clamp on dry-contact or relay output lines, operating in parallel with optocoupler input stages. Use Value: Low leakage (<1 μA) avoids false triggering; 150 °C rating supports operation inside sealed control cabinets with ambient temperatures up to 85 °C. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Safeguarding RS-485 transceivers and Ethernet PHYs against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) in base station backhaul equipment. IC Role / Device Role / Timing Role: First-line transient suppressor on differential bus lines, placed adjacent to connector with minimal trace length. Use Value: Symmetrical clamping eliminates need for dual unidirectional devices; 64.5 V clamping aligns with 3.3 V/5 V transceiver absolute maximum ratings. |
Use Scenario: Protecting microcontroller GPIOs and gate drivers in washing machine or HVAC fan motor control boards exposed to brush-commutator noise. IC Role / Device Role / Timing Role: Localized TVS at motor driver IC inputs and feedback sensing nodes to suppress commutation spikes. Use Value: Fast response time and low Rsurge limit voltage overshoot to <65 V - maintains functional safety integrity per IEC 60730. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ40CA-E3/52 | Same VWM/VBR/VC, but lower PPPM = 600 W (same rating), different package: SMB (DO-214AA); slightly larger footprint (4.58 mm × 3.94 mm vs. SMBG's 4.57 mm × 3.94 mm). | Not AEC-Q101 qualified; intended for industrial/commercial use only. | Select when AEC-Q101 is not required and existing SMB footprint is preferred. |
| SMCJ40CA-M3 | Higher PPPM = 1500 W, same VWM/VBR; larger SMC (DO-214AB) package (7.11 mm × 6.22 mm); higher clamping voltage (69.4 V @ 21.7 A). | Used where higher surge margin is needed (e.g., outdoor telecom, solar inverters), but requires PCB layout change. | Select when system-level surge testing exceeds 600 W or when longer surge duration (e.g., 8/20 μs) dominates threat model. |
Compared with SMBJ40CA-E3/52 and SMCJ40CA-M3, SMBG40CA-M3/52 uniquely combines AEC-Q101 qualification, halogen-free compliance, and compact SMBG footprint - making it optimal for space-constrained automotive modules requiring certified reliability without sacrificing surge margin.
Availability
SMBG40CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O modules, telecom line protection, and consumer appliance motor control requiring stable component supply and long-term lifecycle support.
Supply support for SMBG40CA-M3/52 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 high-reliability, automotive-qualified components.
The SMBG series was engineered specifically for high-density, AEC-Q101-compliant transient suppression in automotive and industrial environments - prioritizing low-profile packaging, repeatable clamping, and robust thermal performance under sustained surge conditions.
FAQ
What does the "CA" suffix indicate in SMBG40CA-M3/52?
The "CA" suffix denotes a bidirectional configuration - meaning SMBG40CA-M3/52 provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBG40A), it has no cathode band marking and delivers identical VBR, VC, and leakage characteristics in either polarity - essential for protecting AC-coupled or differential signal paths without polarity constraints.
Is SMBG40CA-M3/52 suitable for IEC 61000-4-5 surge testing?
Yes, SMBG40CA-M3/52 is rated for 600 W peak pulse power with a 10/1000 μs waveform - directly supporting IEC 61000-4-5 Level 3 (1 kV line-to-earth, 2 kV line-to-line) surge immunity when properly mounted on 5.0 mm × 5.0 mm copper pads. Its 64.5 V clamping voltage at 9.3 A ensures protected circuits remain within safe operating limits during standardized surge events.
How does the M3 suffix differ from E3 in SMBG40CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, whereas E3 denotes standard RoHS compliance without halogen-free assurance. Both meet JESD201 Class 2 whisker resistance and J-STD-002 solderability, but SMBG40CA-M3/52 is specified for applications requiring strict halogen content control - such as automotive Tier 1 supply chains and EU WEEE-regulated products.
What is the maximum operating temperature for SMBG40CA-M3/52?
SMBG40CA-M3/52 has a maximum junction temperature (TJ) of +150 °C and operates across –55 °C to +150 °C. This rating enables deployment in under-hood automotive locations, industrial motor drives, and enclosed power supplies where ambient temperatures exceed 85 °C - provided thermal design follows Vishay's recommended 0.2" × 0.2" copper pad layout to maintain RθJA ≤ 100 °C/W.
Can SMBG40CA-M3/52 replace unidirectional TVS diodes like SMBG40A?
No - SMBG40CA-M3/52 is strictly bidirectional and cannot substitute for unidirectional types like SMBG40A in DC-biased applications (e.g., power rail clamping), where forward conduction must be blocked in one direction. Attempting replacement risks unintended forward conduction and circuit malfunction. Use SMBG40CA-M3/52 only where symmetrical AC or differential protection is required - always verify polarity requirements against the target schematic before substitution.
SMBG40CA-M3/52 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:
- -
- 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-M3/52 FAQ
1.How can I place an order for SMBG40CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG40CA-M3/52 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 SMBG40CA-M3/52 reliable?
The price and inventory of SMBG40CA-M3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG40CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG40CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG40CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG40CA-M3/52?
SMBG40CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG40CA-M3/52 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 SMBG40CA-M3/52?
For technical support, including SMBG40CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG40CA-M3/52 requirements.
6.How does Aetrix verify that SMBG40CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG40CA-M3/52 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 SMBG40CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG40CA-M3/52?
All SMBG40CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG40CA-M3/52, 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 SMBG40CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG40CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG40CA-M3/52 Tags
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