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Vishay General Semiconductor - Diodes Division SMBJ30CA-M3/5B
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- Part No.:
- SMBJ30CA-M3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ30CA-M3/5B.pdf
- Description:
- TVS DIODE 30VWM 48.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,943
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Product details
Overview
SMBJ30CA-M3/5B from Vishay General Semiconductor is a bidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection in power and signal lines. It features a 30 V standoff voltage (VWM), 48.4 V maximum clamping voltage (VC) at 12.4 A peak pulse current (IPPM), and 600 W peak pulse power dissipation (10/1000 µs waveform), making it suitable for safeguarding MOSFETs, ICs, and sensor interfaces against ESD and inductive switching transients in industrial and telecom systems.
For engineers reviewing the SMBJ30CA-M3/5B datasheet, SMBJ30CA-M3/5B pinout, SMBJ30CA-M3/5B application, or SMBJ30CA-M3/5B equivalent, key selection criteria include bidirectional clamping behavior, low clamping ratio (VC/VWM = 1.61), halogen-free RoHS-compliant packaging (M3 suffix), and compatibility with automated SMT assembly on SMB (DO-214AA) footprint.
Technical Context
This device operates as a voltage-clamped crowbar during transient events: when reverse voltage exceeds its 33.3–36.8 V breakdown range (VBR at 1 mA), it rapidly transitions to low-impedance conduction, limiting downstream voltage to ≤48.4 V. Its bidirectional symmetry ensures identical clamping performance for positive and negative transients without polarity sensitivity.
Thermally, it sustains 150 °C maximum junction temperature with 100 °C/W junction-to-ambient thermal resistance (RθJA) on standard 0.2" × 0.2" copper pads, and exhibits a +0.099 %/°C temperature coefficient of VBR, enabling stable operation across automotive and industrial ambient ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off) | 30 V - Maximum continuous reverse operating voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (Min/Max) | 33.3 V / 36.8 V at 1 mA - Verified breakdown onset range; ensures reliable triggering above VWM with defined tolerance. |
| VC @ IPPM | 48.4 V at 12.4 A - Clamped voltage under 600 W 10/1000 µs surge; directly limits stress on protected ICs or MOSFETs. |
| PPPM | 600 W - Peak transient energy absorption capability; supports repetitive 0.01% duty cycle surges per JEDEC standards. |
| IPPM | 12.4 A - Peak surge current handling at rated clamping voltage; correlates with PCB trace and layout current-carrying capacity. |
| TJ max. | +150 °C - Maximum junction temperature rating; enables use in under-hood automotive or high-temperature industrial enclosures. |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with IPC-7351B generic land patterns. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Terminals are matte tin-plated leads, solderable per J-STD-002 and JESD 22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides low-impedance discharge path for both positive- and negative-polarity transients relative to cathode terminal. |
| Cathode | Transient return path (bidirectional) | Functions identically to anode in bidirectional mode; no polarity distinction-either terminal serves as reference for clamping. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM performance for ± transients-eliminates need for polarity-aware placement in AC-coupled or floating lines. |
| 600 W peak pulse power | Withstands 10/1000 µs surges up to 600 W without degradation-meets IEC 61000-4-5 Level 4 requirements when properly mounted. |
| Low clamping ratio | VC/VWM = 1.61-minimizes overvoltage overshoot during clamping, reducing risk of latch-up or gate oxide damage in protected FETs/ICs. |
| Halogen-free & RoHS | M3 suffix confirms halogen-free molding compound and RoHS compliance-supports environmental compliance in EU, China, and global markets. |
| MSL Level 1 | Rated for unlimited floor life at ≤30 °C/60% RH-enables direct placement without baking, reducing manufacturing overhead. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback generated by relay and solenoid switching in PLCs and CNC controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rails and signal lines to clamp fast-rising transients (<1 ns rise time) before they reach sensitive logic. Use Value: Prevents cumulative gate oxide stress and logic upset in 3.3 V/5 V MCUs by limiting transient excursions to ≤48.4 V with sub-nanosecond response. |
Use Scenario: Safeguarding LIN bus transceivers and sensor inputs (e.g., door lock actuators, seat position sensors) against load dump and jump-start surges. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN line and ground to absorb ±100 V/50 ms load dump pulses without forward conduction. Use Value: Maintains communication integrity during battery disconnection/reconnection events by clamping to 48.4 V while drawing <1 µA leakage at 30 V. |
| Telecom Power Feeds | Consumer Appliance Control Boards |
|
Use Scenario: Input-stage protection on 48 V PoE-powered equipment (e.g., IP cameras, wireless access points) exposed to lightning-induced surges on Ethernet cables. IC Role / Device Role / Timing Role: Primary clamping device on DC input rail, coordinated with upstream GDT or MOV for staged surge suppression. Use Value: Absorbs 600 W transient energy without thermal runaway, enabling compact design versus higher-power alternatives requiring heatsinking. |
Use Scenario: Overvoltage protection for microcontroller reset lines and front-panel button interfaces in washing machines and HVAC controllers subject to ESD and relay noise. IC Role / Device Role / Timing Role: Low-capacitance (typ. 150 pF at 0 V) bidirectional suppressor placed directly at connector entry point. Use Value: Blocks >8 kV contact ESD per IEC 61000-4-2 without signal distortion or false resets due to minimal parasitic capacitance and fast response. |
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-E3/5B | Same electrical specs and SMB package; uses standard RoHS-compliant (non-halogen-free) molding compound. | Acceptable where halogen-free material is not mandated by end-equipment environmental policy. | Select when cost sensitivity outweighs halogen-free requirement; identical layout and thermal performance. |
| SMCJ30CA-M3 | Higher 1500 W PPPM, same VWM/VC, but larger SMC (DO-214AB) package (7.11 mm × 6.22 mm). | Used where higher surge margin is needed (e.g., outdoor telecom cabinets), accepting larger board area. | Choose only if 600 W is insufficient; requires PCB footprint redesign and increased thermal mass. |
Compared with SMBJ30CA-E3/5B, the SMBJ30CA-M3/5B offers identical protection performance with halogen-free compliance for stricter environmental programs; compared with SMCJ30CA-M3, it delivers adequate 600 W surge handling in a 30% smaller footprint-ideal for space-constrained industrial PCBs.
Availability
SMBJ30CA-M3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer appliance control boards requiring stable component supply and halogen-free compliance.
Supply support for SMBJ30CA-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, rectifiers, and protection devices with emphasis on reliability, power efficiency, and AEC-Q101 qualification.
The SMBJ series is engineered for high-reliability transient suppression in harsh environments-targeting automotive, industrial, and telecom applications where consistent clamping performance and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ30CA-M3/5B under a 10/1000 µs surge?
The SMBJ30CA-M3/5B clamps to a maximum of 48.4 V when subjected to its rated 12.4 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is guaranteed across the full operating temperature range and forms the basis for downstream circuit protection margining in designs using the SMBJ30CA-M3/5B.
Is SMBJ30CA-M3/5B suitable for automotive applications?
Yes-the SMBJ30CA-M3/5B meets AEC-Q101 qualification when ordered with HE3 or HM3 suffixes; however, the M3/5B variant itself is commercial-grade. For automotive use, specify SMBJ30CA-HM3_B/I or equivalent AEC-Q101 qualified part numbers. The SMBJ30CA-M3/5B remains appropriate for non-safety-critical automotive subsystems where commercial-grade reliability suffices.
How does the bidirectional nature of SMBJ30CA-M3/5B affect PCB layout?
The SMBJ30CA-M3/5B has no polarity marking and identical electrical characteristics in both directions, so PCB layout requires no orientation alignment-either terminal may connect to line or ground. This simplifies routing on differential or AC-coupled lines and eliminates assembly errors associated with unidirectional TVS diodes, enhancing manufacturing yield for the SMBJ30CA-M3/5B.
What is the maximum leakage current of SMBJ30CA-M3/5B at its standoff voltage?
At its 30 V standoff voltage (VWM) and 25 °C ambient temperature, the SMBJ30CA-M3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA. This ultra-low leakage preserves system power budget in always-on circuits and prevents false triggering in high-impedance sensor interfaces protected by the SMBJ30CA-M3/5B.
Does SMBJ30CA-M3/5B require derating at elevated temperatures?
Yes-its peak pulse power (PPPM) must be linearly derated above 25 °C ambient, following the curve in Figure 2 of Vishay document 88392. At 85 °C, PPPM drops to approximately 420 W; at 125 °C, it falls to ~270 W. Designers must apply this derating when specifying the SMBJ30CA-M3/5B for high-temperature environments to ensure sustained surge capability.
SMBJ30CA-M3/5B 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-M3/5B FAQ
1.How can I place an order for SMBJ30CA-M3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ30CA-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 SMBJ30CA-M3/5B reliable?
The price and inventory of SMBJ30CA-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 SMBJ30CA-M3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ30CA-M3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ30CA-M3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ30CA-M3/5B?
SMBJ30CA-M3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ30CA-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 SMBJ30CA-M3/5B?
For technical support, including SMBJ30CA-M3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ30CA-M3/5B requirements.
6.How does Aetrix verify that SMBJ30CA-M3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ30CA-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 SMBJ30CA-M3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ30CA-M3/5B?
All SMBJ30CA-M3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ30CA-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 SMBJ30CA-M3/5B part is unused and in its original packaging.
Return procedure for SMBJ30CA-M3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ30CA-M3/5B Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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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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