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Vishay General Semiconductor - Diodes Division SMBJ15CA-M3/52
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- Part No.:
- SMBJ15CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-M3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,900
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Product details
Overview
SMBJ15CA-M3/52 from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for clamping voltage transients on power and signal lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage (VC) at 24.6 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs and sensor interfaces in industrial power supplies.
For engineers reviewing the SMBJ15CA-M3/52 datasheet, SMBJ15CA-M3/52 pinout, SMBJ15CA-M3/52 application, or SMBJ15CA-M3/52 equivalent, this page delivers verified electrical parameters, bidirectional clamping behavior, thermal resistance (RθJA = 100 °C/W), JEDEC-compliant MSL level 1 handling, and halogen-free RoHS compliance per Vishay's M3 suffix specification.
Technical Context
This TVS diode operates symmetrically in both directions due to its bidirectional construction, enabling protection of AC-coupled or differential signal paths without polarity concerns. Its glass-passivated junction ensures stable breakdown characteristics and low leakage (<1.0 µA at VWM), while the 0.088 %/°C temperature coefficient of VBR maintains predictable clamping across -55 °C to +150 °C operating range.
The device delivers 600 W transient suppression with fast response time (<1.0 ns), low incremental surge resistance, and meets UL 497B recognition (QVGQ2). It is rated for repetitive surges at 0.01 % duty cycle and derates linearly above 25 °C ambient per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 15 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| VBR min/max | 16.7 V / 18.5 V at IT = 1.0 mA - Confirmed breakdown voltage window ensuring reliable turn-on during transients. |
| VC @ IPPM | 24.4 V at 24.6 A - Clamped voltage seen by protected circuit under 600 W 10/1000 µs surge; limits stress on downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability with standard lightning/surge waveform; validates robustness in IEC 61000-4-5 environments. |
| IPPM | 24.6 A - Peak surge current supported at VC; determines minimum trace width and PCB copper area needed for thermal management. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; guides heatsinking and layout for sustained operation. |
| Package | SMB (DO-214AA) - Surface-mount outline with 5.59 mm max length, 4.06 mm max width, and 2.20 mm max height; compatible with automated pick-and-place. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional configuration with no polarity marking; symmetrical terminals suitable for AC or differential line protection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals function identically; conducts surge current in either direction once VBR is exceeded - no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, RS-485 buses, or differential sensors without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements when properly laid out on PCB with recommended copper pads. |
| Halogen-free, RoHS-compliant (M3 suffix) | Complies with IPC-1752A material declaration standards and supports environmentally regulated industrial and automotive supply chains. |
| MSL Level 1, 260 °C reflow peak | Permits standard lead-free SMT assembly without moisture sensitivity baking or special handling protocols. |
| Low clamping ratio (VC/VBR ≈ 1.46) | Minimizes overvoltage exposure to protected ICs - critical for 3.3 V or 5 V logic interfacing with 15 V rail systems. |
Applications
| Industrial Power Input Protection | Automotive Sensor Signal Lines |
|---|---|
|
Use Scenario: 24 V DC input stage of PLC I/O module exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional TVS clamps positive and negative transients to protect upstream DC-DC controller and downstream isolation barrier. Use Value: Limits voltage excursion to ≤24.4 V during 600 W surges, preventing latch-up or gate oxide damage in 30 V-rated MOSFETs and regulators. |
Use Scenario: CAN FD or LIN bus lines in engine control unit connecting to pressure/temperature sensors. IC Role / Device Role / Timing Role: Fast-response transient suppressor placed at connector entry point to absorb ESD and coupled noise without distorting signal edges. Use Value: Sub-1 ns response preserves signal integrity up to 5 Mbps; low capacitance (<100 pF at 0 V) avoids data jitter or bit errors. |
| Consumer Equipment AC-DC Adapter Output | Telecom PoE Interface Protection |
|
Use Scenario: Secondary-side 15 V output of wall adapter powering USB-C PD controller and display interface. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbs coupling from primary-side transients and secondary-side hot-plug events. Use Value: 15 V VWM provides 20 % margin above nominal rail; clamping at 24.4 V prevents overvoltage shutdown in 28 V tolerant receivers. |
Use Scenario: Data pair protection on IEEE 802.3af/at PoE injector port before magnetics and PHY interface. IC Role / Device Role / Timing Role: Bidirectional suppressor shunts common-mode surges induced by lightning or cable discharge events. Use Value: Symmetric clamping ensures equal protection on both conductors; 600 W rating aligns with PoE+ surge test profiles (IEC 61000-4-5, 10/1000 µs). |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-E3/52 | Same electrical specs, but RoHS-compliant with lead-based solder compatibility (E3 suffix); not halogen-free. | Preferred where legacy solder process or J-STD-006 alloy compatibility is required; lacks halogen-free certification. | Select E3/52 for non-automotive commercial designs with existing Pb-based reflow infrastructure. |
| SMAJ15CA-M3 | Lower 400 W PPPM, larger VC (27.7 V), same VWM and package footprint (SMA/DO-214AC). | Insufficient for 600 W surge requirements; acceptable only in space-constrained layouts where 400 W margin suffices. | Choose SMAJ15CA-M3 only if board real estate is critical and surge threat level is limited to IEC 61000-4-5 Level 2. |
Compared with SMBJ15CA-M3/52, the E3/52 variant offers identical clamping performance but trades halogen-free compliance for broader solder alloy compatibility, while the SMAJ15CA-M3 reduces surge capacity by 33 % and increases clamping voltage - making it unsuitable for high-energy industrial or automotive transients.
Availability
SMBJ15CA-M3/52 is available at Aetrix Electronics and suitable for industrial power input protection, automotive sensor signal lines, consumer equipment AC-DC adapter outputs, and telecom PoE interface protection requiring stable component supply and halogen-free compliance.
Supply support for SMBJ15CA-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, TVS devices, and optoelectronics with emphasis on reliability and application-specific performance.
The SMBJ series was developed for high-energy transient suppression in harsh environments - targeting industrial automation, automotive electronics, and telecom infrastructure where consistent clamping and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ15CA-M3/52 at its rated peak pulse current?
The SMBJ15CA-M3/52 has a maximum clamping voltage (VC) of 24.4 V at its rated peak pulse current (IPPM) of 24.6 A, measured using the standardized 10/1000 µs double-exponential surge waveform. This value is confirmed in the Electrical Characteristics table on page 2 of Vishay document 88392 and defines the upper voltage limit imposed on protected circuits during transient events. The SMBJ15CA-M3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ15CA-M3/52 suitable for automotive applications?
The SMBJ15CA-M3/52 itself is not AEC-Q101 qualified; it carries the M3 suffix indicating halogen-free RoHS compliance for commercial-grade use. For automotive applications, Vishay specifies the HM3_X variant (e.g., SMBJ15CAHM3_A), which adds AEC-Q101 qualification. Therefore, SMBJ15CA-M3/52 is appropriate for industrial and consumer systems but requires substitution with an HM3_X part for automotive ECUs or ADAS modules where qualification is mandatory.
What does the "CA" suffix indicate in SMBJ15CA-M3/52?
The "CA" suffix in SMBJ15CA-M3/52 denotes a bidirectional configuration, meaning the device provides symmetrical transient suppression in both forward and reverse directions. Unlike unidirectional variants (e.g., SMBJ15A), the CA version has no cathode marking and is used where polarity is undefined or alternating - such as AC power lines, differential data buses (RS-485, CAN), or transformer-coupled interfaces. This is explicitly stated in the Vishay datasheet section "DEVICES FOR BIDIRECTION APPLICATIONS".
What is the thermal resistance of SMBJ15CA-M3/52, and how does it affect PCB layout?
The SMBJ15CA-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, as specified in the Thermal Characteristics table. This value directly impacts PCB layout: reducing pad size or omitting thermal vias increases RθJA, risking junction overheating during repetitive surges. To maintain reliability, designers must adhere to Vishay's recommended pad dimensions and consider adding thermal vias beneath the SMB pads for high-duty-cycle applications.
How does the M3 suffix differ from E3 in SMBJ15CA-M3/52?
The M3 suffix in SMBJ15CA-M3/52 indicates halogen-free, RoHS-compliant construction meeting IPC-1752A material declarations, whereas E3 denotes RoHS compliance without halogen-free assurance. Both share identical electrical performance and packaging, but M3 is required for compliance with EU RoHS Annex III exemptions and certain automotive OEM material specifications. The "/52" denotes 7" tape-and-reel packaging with 750 units per reel - a standard logistics identifier unrelated to material content.
SMBJ15CA-M3/52 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- 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:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ15CA-M3/52 FAQ
1.How can I place an order for SMBJ15CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-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 SMBJ15CA-M3/52 reliable?
The price and inventory of SMBJ15CA-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 SMBJ15CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-M3/52?
SMBJ15CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-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 SMBJ15CA-M3/52?
For technical support, including SMBJ15CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ15CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-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 SMBJ15CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-M3/52?
All SMBJ15CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-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 SMBJ15CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ15CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-M3/52 Tags
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