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Vishay General Semiconductor - Diodes Division SMBJ30CA-M3/52
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- Part No.:
- SMBJ30CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CA-M3/52.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:6,750
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Product details
Overview
SMBJ30CA-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 30 V stand-off voltage (VWM), 48.4 V maximum clamping voltage at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power dissipation with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial power supplies and telecom line cards.
For engineers reviewing the SMBJ30CA-M3/52 datasheet, SMBJ30CA-M3/52 pinout, SMBJ30CA-M3/52 application, or SMBJ30CA-M3/52 equivalent, key selection criteria include bidirectional surge capability, low clamping ratio (VC/VWM = 1.61), MSL Level 1 moisture sensitivity, halogen-free RoHS compliance (M3 suffix), and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its 33.3–36.8 V minimum/maximum breakdown voltage (VBR) at 1 mA test current ensures reliable triggering above normal operating voltage while maintaining margin against false trips.
The SMBJ30CA-M3/52 delivers 12.4 A peak pulse current (IPPM) under 10/1000 µs surge conditions, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead), enabling stable operation up to 150 °C junction temperature and supporting repetitive surge duty cycles at ≤0.01%.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 30 V - maximum continuous reverse stand-off voltage before clamping begins; defines safe operating window for protected circuitry. |
| VBR min/max | 33.3 V / 36.8 V at 1 mA - guaranteed breakdown threshold range ensuring consistent transient response across production lots. |
| VC @ IPPM | 48.4 V at 12.4 A - clamping voltage during worst-case 10/1000 µs surge; determines maximum stress imposed on downstream components. |
| PPPM | 600 W - peak pulse power handling per single transient event; validates robustness against lightning-induced or inductive-switching surges. |
| ID @ VWM | 1.0 µA - maximum reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss and signal integrity in high-impedance paths. |
| TJ max | +150 °C - maximum junction temperature rating; supports deployment in enclosed industrial enclosures without forced cooling. |
| Package | SMB (DO-214AA) - standardized surface-mount outline with 5.59 mm length, 4.06 mm width, and 2.20 mm height; compatible with IPC-7351B footprint. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetric and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode / Anode (both ends) | Surge current path | Identical bidirectional terminals; current flows either direction during overvoltage events - no cathode band marking required. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns - eliminates need for dual unidirectional devices. |
| 600 W peak pulse power | Handles IEC 61000-4-5 Level 4 (4 kV) surge events when mounted on 5.0 mm × 5.0 mm copper pads - meets industrial immunity requirements. |
| Halogen-free & RoHS-compliant (M3) | Meets JEDEC J-STD-201 Class 2 whisker resistance and UL 94 V-0 flammability - suitable for environmentally regulated consumer and automotive-adjacent systems. |
| MSL Level 1 rating | Allows unlimited floor life and reflow at peak temperature up to 260 °C - simplifies manufacturing flow without baking or dry-pack requirements. |
| Low clamping ratio (VC/VWM) | 1.61 - minimizes overvoltage exposure to protected ICs compared to alternatives with ratios >1.8, reducing risk of latch-up or gate oxide damage. |
Applications
| Industrial Power Supply Protection | Telecom Line Card Surge Protection |
|---|---|
|
Use Scenario: Protecting 24 V DC input rails in programmable logic controllers (PLCs) against inductive kickback from solenoid drivers. IC Role / Device Role: Primary clamping element placed across input terminals upstream of DC-DC converters and EMI filters. Use Value: Limits transient voltage to ≤48.4 V during 12.4 A surges, preventing damage to 36 V-rated input-stage MOSFETs and controller ICs. |
Use Scenario: Safeguarding RS-485 transceivers on base station backhaul interface cards exposed to lightning-induced surges. IC Role / Device Role: Bidirectional shunt protector on differential bus lines, paired with common-mode chokes. Use Value: Clamps common-mode transients to <50 V while maintaining signal integrity up to 20 Mbps - avoids data corruption during surge events. |
| Automotive Body Control Module (BCM) | Consumer Sensor Interface Protection |
|
Use Scenario: Shielding LIN bus nodes in door module ECUs from load dump and jump-start transients. IC Role / Device Role: Secondary-level TVS on LIN transceiver supply and data lines, compliant with AEC-Q101 via HM3 variant family. Use Value: Withstands 12.4 A pulses at 48.4 V clamping, meeting ISO 7637-2 Pulse 1/2/5a requirements when combined with upstream filtering. |
Use Scenario: Securing I²C lines between microcontroller and environmental sensors (e.g., humidity, pressure) in smart home hubs. IC Role / Device Role: Low-capacitance (<100 pF) bidirectional clamp placed directly at sensor connector entry point. Use Value: Adds <1 µA leakage at 30 V, preserving battery life in always-on IoT devices while suppressing ESD per IEC 61000-4-2 Level 4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ30CA-E3/52 | Same electrical specs; RoHS-compliant but not halogen-free (E3 vs. M3). | Preferred for commercial-grade non-automotive designs where halogen content is unrestricted. | Select E3 for cost-sensitive volume production without halogen restrictions; M3 required for EU EcoDesign or Japan JIS C 0950 compliance. |
| SMAJ30CA-13-F | Lower PPPM (400 W), higher VC (53.3 V), SMA package (smaller footprint, higher RθJA = 150 °C/W). | Suitable only for lower-energy transients or space-constrained PCBs where thermal derating is acceptable. | Choose SMAJ30CA-13-F only if board area is critical and surge energy is limited to ≤400 W; SMBJ30CA-M3/52 provides 50% higher power margin. |
Compared with SMBJ30CA-E3/52, the M3 variant adds halogen-free assurance without performance trade-offs; versus SMAJ30CA-13-F, SMBJ30CA-M3/52 delivers superior thermal performance and 50% higher surge power handling - critical for industrial and telecom infrastructure reliability.
Availability
SMBJ30CA-M3/52 is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, automotive body control modules, and consumer sensor interfaces requiring stable component supply across multi-year production cycles.
Supply support for SMBJ30CA-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, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series was engineered for high-reliability transient suppression in harsh environments - targeting industrial automation, telecom infrastructure, and automotive subsystems where surge immunity and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ30CA-M3/52 under a 10/1000 µs surge?
The SMBJ30CA-M3/52 has a maximum clamping voltage (VC) of 48.4 V at 12.4 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured with the device mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per Vishay's test condition - critical for validating protection margins in your circuit design. The SMBJ30CA-M3/52 maintains this clamping performance across its full operating temperature range.
Is SMBJ30CA-M3/52 suitable for automotive applications?
The SMBJ30CA-M3/52 itself is commercial-grade and not AEC-Q101 qualified; however, it belongs to the SMBJ family where AEC-Q101 variants exist (e.g., SMBJ30CAHM3_B/H). For automotive use, specify the HM3 suffix and revision code. The SMBJ30CA-M3/52 is appropriate for non-safety-critical automotive-adjacent systems like infotainment power rails or cabin sensor interfaces where qualification is not mandated - always verify end-system requirements before selecting SMBJ30CA-M3/52.
How does the M3 suffix differ from E3 in SMBJ30CA-M3/52?
The M3 suffix indicates halogen-free, RoHS-compliant construction meeting JEDEC J-STD-201 Class 2 whisker resistance, whereas E3 is RoHS-compliant but contains halogens. Both share identical electrical characteristics, thermal ratings, and packaging. The SMBJ30CA-M3/52 is specified for environmentally regulated markets including EU RoHS recast and Japan's JIS C 0950, while E3 suffices for general commercial applications. No layout or soldering process changes are needed when substituting SMBJ30CA-M3/52 for E3.
What is the maximum reverse leakage current of SMBJ30CA-M3/52 at its rated stand-off voltage?
The SMBJ30CA-M3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 30 V stand-off voltage (VWM), measured at 25 °C ambient. This ultra-low leakage preserves signal integrity in high-impedance sensor interfaces and minimizes standby power loss in battery-powered systems. Leakage remains below 5 µA up to +85 °C, making SMBJ30CA-M3/52 suitable for wide-temperature industrial deployments.
Can SMBJ30CA-M3/52 be used in bidirectional AC signal line protection?
Yes - SMBJ30CA-M3/52 is explicitly designed for bidirectional applications, with symmetrical breakdown and clamping behavior in both polarities. Its lack of polarity marking and matched VBR min/max (33.3 V / 36.8 V) in either direction make it ideal for protecting AC-coupled data lines (e.g., RS-485, CAN FD), audio paths, or transformer-isolated interfaces. Unlike unidirectional TVS diodes, SMBJ30CA-M3/52 requires no orientation check during placement, simplifying assembly and reducing error risk.
SMBJ30CA-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):
- 30V
- Voltage - Breakdown (Min):
- 33.3V
- Voltage - Clamping (Max) @ Ipp:
- 48.4V
- Current - Peak Pulse (10/1000µs):
- 12.4A
- 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)
SMBJ30CA-M3/52 FAQ
1.How can I place an order for SMBJ30CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CA-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 SMBJ30CA-M3/52 reliable?
The price and inventory of SMBJ30CA-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 SMBJ30CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ30CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CA-M3/52?
SMBJ30CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CA-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 SMBJ30CA-M3/52?
For technical support, including SMBJ30CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ30CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ30CA-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 SMBJ30CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ30CA-M3/52?
All SMBJ30CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CA-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 SMBJ30CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ30CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CA-M3/52 Tags
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Diodes Incorporated
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Diodes Incorporated
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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