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Vishay General Semiconductor - Diodes Division SMBG15CA-M3/52
- Part No.:
- SMBG15CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG15CA-M3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,555
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Product details
Overview
SMBG15CA-M3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for clamping voltage transients on signal and power lines. It features a 15 V stand-off voltage (VWM), 16.7–18.5 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), <1.0 µA reverse leakage at VWM, and clamps to ≤24.4 V at 24.6 A peak pulse current - deployed in automotive sensor interfaces and industrial I/O protection.
For engineers reviewing the SMBG15CA-M3/52 datasheet, SMBG15CA-M3/52 pinout, SMBG15CA-M3/52 application, or SMBG15CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, halogen-free RoHS compliance (M3 suffix), 150 °C max junction temperature, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a silicon avalanche diode optimized for fast transient suppression in both polarities, with symmetrical VBR min/max (16.7–18.5 V) and identical clamping behavior in forward and reverse directions. Its low incremental surge resistance and sub-nanosecond response time enable effective protection against ESD, lightning-induced surges, and inductive switching spikes.
Thermally, it exhibits RθJA = 100 °C/W (on 5.0 mm × 5.0 mm pads) and RθJL = 20 °C/W, supporting reliable operation up to TJ = 150 °C. The M3 suffix confirms halogen-free molding compound, AEC-Q101 qualification, and JESD201 Class 2 whisker resistance - critical for automotive and harsh-environment deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - maximum continuous reverse voltage before significant leakage; defines operating margin below clamping threshold |
| VBR (min/max) | 16.7 V / 18.5 V at 1 mA - ensures predictable avalanche onset across production lot and temperature |
| IPPM | 24.6 A (10/1000 µs) - peak surge current it safely shunts without failure under standardized transient waveform |
| VC | ≤24.4 V at IPPM - clamped voltage seen by protected circuit; limits stress on downstream ICs or MOSFETs |
| PPPM | 600 W - peak transient power dissipation capability; determines survivability of high-energy surges |
| TJ max | +150 °C - maximum junction temperature; enables use in under-hood automotive or high-ambient industrial settings |
| Leakage (ID) | <1.0 µA at VWM - negligible standby power loss and signal integrity impact in high-impedance circuits |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated, MSL Level 1 (260 °C peak reflow). Bidirectional construction - no polarity marking; symmetric terminal function.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (reverse bias) | One side of symmetrical avalanche junction; conducts during negative transients |
| Cathode | Transient current entry (forward bias) | Other side of symmetrical junction; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control, body electronics, and ADAS sensor interfaces |
| Halogen-free & RoHS compliant (M3) | Meets environmental regulations and reliability standards for industrial and automotive supply chains |
| 600 W peak pulse power (10/1000 µs) | Withstands high-energy transients common in 12 V/24 V vehicle systems and factory automation |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes overvoltage stress on protected ICs while maintaining robust surge margin |
| Fast response time (<1 ns) | Engages before transient energy couples into sensitive analog or digital circuitry |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ESD in passenger vehicles. IC Role / Device Role: Bidirectional clamping element placed between signal line and ground, absorbing transients before they reach the PHY layer. Use Value: Maintains signal integrity under ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-2 ESD events due to its 24.4 V clamping and AEC-Q101 qualification. | Use Scenario: Safeguarding PLC analog input modules and digital fieldbus nodes (RS-485, Profibus) against induced surges in factory environments. IC Role / Device Role: Primary TVS at connector interface, shunting surge energy to chassis or signal ground before entering isolation or conditioning circuitry. Use Value: Enables robust operation in noisy industrial settings with 600 W surge rating and 150 °C thermal capability - reducing field failures from repetitive transients. |
| Consumer Power Adapter Input | Telecom Line Interface Protection |
Use Scenario: Secondary-side overvoltage suppression in AC/DC adapters and USB PD chargers exposed to mains-borne surges. IC Role / Device Role: Clamp diode across DC output rails or auxiliary bias lines to prevent overvoltage damage to controller ICs and optocouplers. Use Value: Halogen-free M3 construction supports global regulatory compliance; low leakage (<1 µA) avoids efficiency loss in standby mode. | Use Scenario: Protecting Ethernet PHYs and DSL line drivers from lightning-induced surges on outdoor telecom lines. IC Role / Device Role: First-stage protector on differential pairs, working with common-mode chokes and secondary TVS arrays. Use Value: Symmetrical bidirectional clamping ensures equal protection on both line polarities; 24.4 V clamp preserves PHY's absolute maximum ratings. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG15CA-E3/52 | Same electrical specs; uses standard RoHS-compliant (non-halogen-free) molding compound | Approved for industrial but not automotive AEC-Q101 applications | Select when halogen-free requirement is not mandated and cost optimization is prioritized |
| SMBG15CAHM3/52 | Identical specs and M3 halogen-free material; adds AEC-Q101 qualification (HM3 suffix) | Explicitly certified for automotive use cases requiring full AEC-Q101 documentation | Choose for new automotive designs where qualification traceability and test reports are mandatory |
Compared with SMBG15CA-M3/52, the E3 variant lacks halogen-free certification and AEC-Q101 validation, limiting automotive use; the HM3 variant provides identical performance with full AEC-Q101 documentation - making SMBG15CA-M3/52 the balanced choice for industrial and light automotive applications requiring halogen-free compliance without full automotive certification overhead.
Availability
SMBG15CA-M3/52 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC I/O protection, and telecom line interface designs requiring stable component supply, halogen-free compliance, and AEC-Q101-adjacent reliability.
Supply support for SMBG15CA-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 reliability, power handling, and automotive-grade qualification.
The SMBG series is engineered for high-power transient suppression in compact surface-mount packages, targeting design-in across automotive, industrial, and communications infrastructure where space-constrained, high-surge-capability protection is essential.
FAQ
What is the clamping voltage of SMBG15CA-M3/52 at its rated peak pulse current?
The SMBG15CA-M3/52 clamps to a maximum of 24.4 V at its rated peak pulse current of 24.6 A (10/1000 µs waveform). This value is specified in the Vishay datasheet (Document Number: 88456, page 2) and represents the upper limit of voltage imposed on the protected circuit during a standardized surge event - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMBG15CA-M3/52 suitable for automotive applications?
Yes, SMBG15CA-M3/52 is AEC-Q101 qualified per Vishay documentation, confirming its suitability for automotive applications including engine control units, body electronics, and sensor interfaces. While the M3 suffix denotes halogen-free RoHS compliance and JESD201 Class 2 whisker resistance, full AEC-Q101 test reports are provided - making SMBG15CA-M3/52 appropriate for under-hood and cabin environments where reliability under thermal cycling and vibration is required.
How does the bidirectional nature of SMBG15CA-M3/52 affect its circuit implementation?
The bidirectional structure of SMBG15CA-M3/52 means it functions identically in both polarities - no cathode band marking, no orientation sensitivity during placement. In circuit design, it is installed across differential lines (e.g., CAN_H/CAN_L) or between a single-ended signal and ground, providing symmetrical clamping for positive and negative transients. This eliminates polarity-checking during assembly and simplifies layout for AC-coupled or floating interfaces.
What is the thermal resistance of SMBG15CA-M3/52, and how does it impact PCB layout?
SMBG15CA-M3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repeated surges, PCB layout must replicate this pad area - undersized pads increase thermal impedance, risking premature thermal runaway. The device also specifies RθJL = 20 °C/W, indicating efficient heat transfer to solder joints when properly reflowed.
Does SMBG15CA-M3/52 require derating at elevated ambient temperatures?
Yes, SMBG15CA-M3/52 requires derating above TA = 25 °C, as shown in Figure 2 of the Vishay datasheet. Its peak pulse power capability decreases linearly with rising ambient temperature - for example, at 85 °C ambient, PPPM drops to approximately 40% of the 600 W rating. Designers must apply this derating curve when sizing protection for high-temperature enclosures or under-hood locations to ensure sustained surge survival.
SMBG15CA-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):
- 15V
- Voltage - Breakdown (Min):
- 16.7V
- Voltage - Clamping (Max) @ Ipp:
- 24.4V
- Current - Peak Pulse (10/1000µs):
- 24.6A
- 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)
SMBG15CA-M3/52 FAQ
1.How can I place an order for SMBG15CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG15CA-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 SMBG15CA-M3/52 reliable?
The price and inventory of SMBG15CA-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 SMBG15CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBG15CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG15CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG15CA-M3/52?
SMBG15CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG15CA-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 SMBG15CA-M3/52?
For technical support, including SMBG15CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG15CA-M3/52 requirements.
6.How does Aetrix verify that SMBG15CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG15CA-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 SMBG15CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBG15CA-M3/52?
All SMBG15CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG15CA-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 SMBG15CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBG15CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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