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Vishay General Semiconductor - Diodes Division SMBJ33CA-M3/52
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- Part No.:
- SMBJ33CA-M3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ33CA-M3/52.pdf
- Description:
- TVS DIODE 33VWM 53.3VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,144
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Product details
Overview
SMBJ33CA-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 signal and power lines. It features a 33 V standoff voltage (VWM), 53.3 V maximum clamping voltage (VC) at 11.3 A peak pulse current (IPPM), and 600 W peak pulse power (10/1000 µs waveform), protecting MOSFETs, ICs, and sensor interfaces in industrial and telecom equipment.
For engineers reviewing the SMBJ33CA-M3/52 datasheet, SMBJ33CA-M3/52 pinout, SMBJ33CA-M3/52 application, or SMBJ33CA-M3/52 equivalent, key selection criteria include bidirectional clamping capability, 33 V working voltage compatibility with 3.3 V–24 V systems, low incremental surge resistance, and halogen-free RoHS-compliant packaging for high-reliability PCB assembly.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both directions, enabling use on AC-coupled or floating signal lines without polarity concerns. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), while the SMB package provides thermal performance suitable for 5.0 W steady-state dissipation at TA = 50 °C.
The SMBJ33CA-M3/52 complies with IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and IEC 61000-4-5 (surge) immunity standards when applied per recommended PCB layout. Its 0.1 %/°C temperature coefficient of VBR ensures predictable clamping across -55 °C to +150 °C operating junction range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 33 V - Maximum continuous reverse voltage before significant leakage; defines compatible bus voltage range (e.g., 24 V DC systems). |
| VBR (Breakdown Voltage, min/max) | 36.7 V / 40.6 V at 1 mA - Ensures reliable turn-on above normal operating voltage while avoiding false triggering. |
| VC (Clamping Voltage) | 53.3 V at 11.3 A (10/1000 µs) - Limits transient voltage seen by downstream ICs to safe levels during surge events. |
| IPPM (Peak Pulse Current) | 11.3 A - Sustains defined surge energy (600 W) without degradation; derates linearly above 25 °C ambient. |
| PPPM (Peak Pulse Power) | 600 W - Handles standardized lightning/surge waveforms (IEC 61000-4-5) with 0.01 % duty cycle. |
| TJmax | +150 °C - Supports operation in high-temperature environments such as industrial motor drives and outdoor telecom enclosures. |
| Package | SMB (DO-214AA) - Surface-mount footprint (5.21 mm × 4.06 mm) with matte tin-plated leads, MSL Level 1, LF peak 260 °C. |
Pinout & Package
Package: SMB (DO-214AA), bidirectional device with no polarity marking; terminals are symmetrical anode/cathode configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (Terminal 1) | Transient current entry point (either direction) | Accepts surge current during positive or negative overvoltage events; connects to protected line. |
| Cathode (Terminal 2) | Transient current exit point (either direction) | Completes clamping path to reference plane (e.g., GND or return rail); symmetric with Anode for bidirectional operation. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating differential lines (e.g., RS-485, CAN, USB D+/D−) without external polarity management. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 4 surge immunity requirements for industrial equipment with minimal PCB area. |
| Halogen-free, RoHS-compliant (M3 suffix) | Supports environmental compliance for global OEM shipments and eliminates corrosive halogen emissions during reflow or failure. |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes voltage overshoot during transients, reducing stress on 3.3 V–5 V logic-level interface ICs downstream. |
| MSL Level 1, 260 °C lead-free reflow compatible | Allows single-pass assembly with standard Pb-free solder profiles without moisture sensitivity concerns or baking requirements. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate driver inputs and feedback sensing lines against inductive kickback from relay coils and solenoid switching. IC Role / Device Role / Timing Role: Voltage clamping element placed directly at connector entry or IC input pins to limit transient excursions below 55 V. Use Value: Prevents latch-up or oxide damage in 3.3 V microcontrollers and isolated gate drivers exposed to >1 kV surge events per IEC 61000-4-5. |
Use Scenario: ESD and load-dump suppression on LIN bus and sensor supply rails (e.g., temperature, position sensors) in BCM subassemblies. IC Role / Device Role / Timing Role: Bidirectional transient suppressor bridging between 12 V supply and ground, absorbing ±25 kV contact ESD per ISO 10605. Use Value: Maintains signal integrity during vehicle jump-start or alternator load dump while meeting AEC-Q101 qualification via HM3 variant lineage. |
| Telecom Power Feeds | Consumer IoT Sensor Hubs |
|
Use Scenario: Surge protection on PoE-powered Ethernet ports and auxiliary DC feeds in remote radio units and base station controllers. IC Role / Device Role / Timing Role: Primary clamping device on 48 V DC input rails, coordinated with upstream fuses and downstream DC-DC converters. Use Value: Clamps 10/1000 µs surges up to 600 W without thermal runaway, preserving uptime in outdoor telecom infrastructure. |
Use Scenario: ESD hardening of I²C, SPI, and analog sensor inputs (e.g., humidity, motion) in battery-powered smart home hubs. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) TVS placed adjacent to connector or IC pad to shunt fast transients before propagation. Use Value: Enables robust 8 kV contact / 15 kV air ESD immunity per IEC 61000-4-2 without degrading signal rise time on 100 kHz–1 MHz sensor buses. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA-E3/52 | Same electrical specs; RoHS-compliant but contains brominated flame retardants (non-halogen-free). | Approved for commercial-grade applications where halogen-free requirement is not mandated (e.g., non-automotive consumer devices). | Select when cost sensitivity outweighs halogen-free compliance; identical footprint and assembly process. |
| SMAJ33CA-M3 | Lower peak pulse power (400 W vs. 600 W); same VWM, VC, and SMB-like SMA package (smaller, higher RθJA). | Suitable only for lower-energy transients (e.g., board-level ESD), not full IEC 61000-4-5 Level 4 surge. | Choose for space-constrained designs accepting reduced surge margin; requires thermal validation due to 150 °C/W RθJA. |
Compared with SMBJ33CA-E3/52, the SMBJ33CA-M3/52 offers halogen-free construction for stricter environmental compliance, while versus SMAJ33CA-M3 it delivers 50 % higher surge energy handling and superior thermal dissipation in the larger SMB package-critical for industrial and automotive front-end protection.
Availability
SMBJ33CA-M3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and consumer IoT sensor hubs requiring stable component supply and halogen-free manufacturing compliance.
Supply support for SMBJ33CA-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 developed for high-energy transient suppression in harsh environments, targeting industrial automation, automotive subsystems, and infrastructure equipment where robustness and long-term stability are mandatory.
FAQ
What is the clamping voltage of SMBJ33CA-M3/52 at its rated peak pulse current?
The SMBJ33CA-M3/52 has a maximum clamping voltage (VC) of 53.3 V at 11.3 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per IEC 61000-4-5 test conditions and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ33CA-M3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C junction).
Is SMBJ33CA-M3/52 suitable for automotive applications?
The SMBJ33CA-M3/52 itself is commercial-grade and not AEC-Q101 qualified; however, it shares identical electrical and mechanical specifications with the AEC-Q101-qualified HM3 variants (e.g., SMBJ33CAHM3_B/H). For automotive body control modules or infotainment systems requiring qualification, engineers should specify the HM3-suffixed part. The SMBJ33CA-M3/52 remains appropriate for non-safety-critical automotive development or pre-qualification prototyping where halogen-free compliance is required.
How does the bidirectional design of SMBJ33CA-M3/52 affect PCB layout?
The SMBJ33CA-M3/52 has no polarity marking and symmetrical terminal behavior, eliminating orientation constraints during automated placement. PCB layout requires equal copper pour area (minimum 5.0 mm × 5.0 mm per pad) on both terminals to ensure balanced thermal dissipation and consistent clamping performance. Unlike unidirectional TVS diodes, no cathode band alignment is needed-reducing placement error risk and simplifying routing for differential or AC-coupled lines.
What is the maximum steady-state power dissipation for SMBJ33CA-M3/52?
The SMBJ33CA-M3/52 has a maximum steady-state power dissipation (PD) of 5.0 W when mounted on an infinite heatsink at ambient temperature (TA) of 50 °C. In typical PCB applications with 0.2" × 0.2" copper pads per terminal, derating applies above 25 °C ambient per Figure 2 in the datasheet. Continuous DC power must remain well below this limit to avoid thermal runaway; the device is intended for transient, not sustained, overload conditions.
Does SMBJ33CA-M3/52 meet lead-free reflow requirements?
Yes, the SMBJ33CA-M3/52 is rated for lead-free reflow with a maximum peak temperature of 260 °C and meets MSL Level 1 per J-STD-020. Its matte tin-plated leads comply with J-STD-002 and JESD 22-B102 solderability standards, and it passes JESD 201 Class 2 whisker testing. No baking or special handling is required prior to assembly, supporting high-yield, high-volume SMT production.
SMBJ33CA-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):
- 33V
- Voltage - Breakdown (Min):
- 36.7V
- Voltage - Clamping (Max) @ Ipp:
- 53.3V
- Current - Peak Pulse (10/1000µs):
- 11.3A
- 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)
SMBJ33CA-M3/52 FAQ
1.How can I place an order for SMBJ33CA-M3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ33CA-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 SMBJ33CA-M3/52 reliable?
The price and inventory of SMBJ33CA-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 SMBJ33CA-M3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ33CA-M3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ33CA-M3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ33CA-M3/52?
SMBJ33CA-M3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ33CA-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 SMBJ33CA-M3/52?
For technical support, including SMBJ33CA-M3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ33CA-M3/52 requirements.
6.How does Aetrix verify that SMBJ33CA-M3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ33CA-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 SMBJ33CA-M3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ33CA-M3/52?
All SMBJ33CA-M3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ33CA-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 SMBJ33CA-M3/52 part is unused and in its original packaging.
Return procedure for SMBJ33CA-M3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ33CA-M3/52 Tags
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