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Vishay General Semiconductor - Diodes Division SMBJ150CA-E3/52
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- Part No.:
- SMBJ150CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ150CA-E3/52.pdf
- Description:
- TVS DIODE 150VWM 243VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,870
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Product details
Overview
SMBJ150CA-E3/52 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 150 V standoff voltage (VWM), 167–185 V breakdown voltage (VBR) at 1 mA, 243 V maximum clamping voltage (VC) at 2.5 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - deployed to safeguard MOSFETs, ICs, and sensor interfaces against lightning-induced surges and inductive switching transients.
For engineers reviewing the SMBJ150CA-E3/52 datasheet, SMBJ150CA-E3/52 pinout, SMBJ150CA-E3/52 application, or SMBJ150CA-E3/52 equivalent, this device is evaluated for bidirectional surge suppression in industrial power supplies, telecom line cards, and automotive body control modules where low clamping voltage, fast response (<1 ns), and AEC-Q101-qualified variants are critical selection criteria.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior and leakage performance in forward and reverse directions. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, while the SMB (DO-214AA) package supports automated placement and meets MSL Level 1 per J-STD-020 at 260 °C peak reflow.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead). It complies with ANSI/IEEE C62.35 for transient suppressor definitions and is UL 497B recognized (QVGQ2, E136766) for protector classification in both uni- and bidirectional configurations.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 150 V - Maximum continuous reverse voltage before significant conduction begins; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 167–185 V at 1 mA - Guaranteed voltage range where device enters avalanche breakdown; ensures predictable turn-on under surge conditions. |
| VC (Clamping Voltage) | 243 V at IPPM = 2.5 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; directly limits stress on downstream components. |
| PPPM (Peak Pulse Power) | 600 W - Sustained energy-handling capability for standardized 10/1000 µs transients; enables protection against IEC 61000-4-5 Level 4 surges. |
| IPPM (Peak Pulse Current) | 2.5 A - Maximum non-repetitive surge current the device can shunt without degradation; derived from VC and PPPM (P = V × I). |
| Leakage Current (ID) | 1.0 µA max. at VWM - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ Range | -55 °C to +150 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor telecom equipment. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical anode/cathode pair.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional surge path | Either terminal accepts positive or negative transients; no cathode band marking required for CA suffix devices. |
| Case (body) | Thermal and mechanical interface | Plastic molded case with UL 94 V-0 rating; mounted on 5.0 mm × 5.0 mm copper pads per terminal for optimal thermal dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables compliance with IEC 61000-4-5 surge immunity requirements up to Level 4 (4 kV line-to-line) when properly laid out. |
| 243 V clamping voltage at 2.5 A | Limits voltage overshoot across protected ICs or MOSFETs during fast transients, reducing risk of gate oxide rupture or latch-up. |
| Low-profile SMB (DO-214AA) package | 0.220" × 0.155" footprint with 0.086" height - fits dense PCB layouts and supports high-speed automated pick-and-place assembly. |
| UL 497B recognition (QVGQ2, E136766) | Validated safety certification for telecom and industrial protectors - eliminates need for additional system-level safety testing in many end-equipment approvals. |
| AEC-Q101 qualification option | Available as SMBJ150CAHE3 variant - qualified for automotive applications including body electronics and infotainment power rails. |
Applications
| Industrial Motor Drives | Telecom Line Cards |
|---|---|
|
Use Scenario: Protection of gate drivers and bus voltage sense inputs against commutation spikes and load dump events in 24–48 V DC motor controllers. IC Role / Device Role / Timing Role: Bidirectional TVS placed across DC bus or between gate and source to clamp inductive kickback and ESD. Use Value: Prevents false triggering of overvoltage protection and extends lifetime of SiC MOSFETs by limiting VDS excursion to ≤243 V during 2.5 A surges. |
Use Scenario: Surge protection on T1/E1 interface lines exposed to lightning-induced common-mode transients in central office and remote terminal units. IC Role / Device Role / Timing Role: Primary-level TVS on transformer-coupled data lines, coordinated with secondary-side GDTs or polymer PTCs. Use Value: Maintains signal integrity below 150 V standoff while clamping 10/1000 µs surges to 243 V - preserving receiver input thresholds and meeting GR-1089-CORE requirements. |
| Automotive Body Control Modules | Consumer Sensor Interfaces |
|
Use Scenario: Input protection for LIN bus transceivers and power window motor drivers subjected to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Bidirectional TVS on 12 V supply rail and LIN signal line, upstream of LDOs and transceivers. Use Value: Withstands 100 A surge current (IFSM) and operates up to +150 °C junction - meets AEC-Q101 stress test requirements when used as SMBJ150CAHE3. |
Use Scenario: ESD and surge hardening of analog outputs (e.g., 4–20 mA loops) and digital I²C/SPI lines in smart thermostats and HVAC sensors. IC Role / Device Role / Timing Role: Low-leakage (≤1 µA) TVS placed adjacent to connector pins to divert contact discharge (IEC 61000-4-2 ±8 kV) before reaching precision ADCs. Use Value: Sub-1 ns response time and 243 V clamping prevent latch-up in 3.3 V microcontrollers while adding <0.5 pF parasitic capacitance at 0 V bias. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A-E3/52 | Unidirectional version; includes cathode band marking and forward voltage drop (VF ≤ 3.5 V @ 50 A). | Required only where DC polarity is fixed and forward conduction must be blocked - e.g., DC power input rails with known ground reference. | Select SMBJ150A-E3/52 if protecting unidirectional paths like 150 V DC supplies; otherwise prefer SMBJ150CA-E3/52 for AC-coupled or floating signal lines. |
| SMCJ150CA | Same electrical specs but in larger SMC (DO-214AB) package; 1.5× higher thermal mass and RθJA = 50 °C/W. | Better suited for higher average power dissipation or repeated surge events due to improved heat spreading and lower junction temperature rise. | Choose SMCJ150CA when board layout allows larger footprint and thermal management demands >5 W continuous dissipation or frequent surge cycling. |
Compared with SMBJ150A-E3/52, SMBJ150CA-E3/52 provides symmetrical protection without polarity constraints; versus SMCJ150CA, it trades thermal headroom for space savings - making SMBJ150CA-E3/52 optimal for compact, cost-sensitive, bidirectionally referenced designs.
Availability
SMBJ150CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, telecom line cards, and automotive body control modules requiring stable component supply, RoHS-compliant commercial-grade TVS diodes with UL recognition and MSL Level 1 reflow compatibility.
Supply support for SMBJ150CA-E3/52 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 efficiency, and application-specific validation.
The SMBJ series is engineered for high-energy transient suppression in space-constrained environments - targeting industrial automation, automotive electronics, and communications infrastructure where robustness and rapid response are mandatory.
FAQ
What is the clamping voltage of SMBJ150CA-E3/52 at its rated peak pulse current?
The SMBJ150CA-E3/52 has a maximum clamping voltage (VC) of 243 V at a peak pulse current (IPPM) of 2.5 A using the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and guarantees the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings. The SMBJ150CA-E3/52 achieves this with low incremental surge resistance and stable avalanche characteristics.
Is SMBJ150CA-E3/52 suitable for automotive applications?
The base SMBJ150CA-E3/52 is a commercial-grade, RoHS-compliant part. However, Vishay offers the AEC-Q101-qualified variant SMBJ150CAHE3 for automotive use - identical electrical specs but validated for extended temperature cycling, humidity, and mechanical shock per AEC-Q101. For body control modules or infotainment power rails requiring automotive qualification, specify SMBJ150CAHE3 instead of SMBJ150CA-E3/52. The SMBJ150CA-E3/52 itself is not AEC-Q101 certified.
How does SMBJ150CA-E3/52 differ from SMBJ150A-E3/52?
SMBJ150CA-E3/52 is bidirectional with symmetrical clamping in both polarities and no cathode marking, while SMBJ150A-E3/52 is unidirectional with a cathode band and specified forward voltage (VF ≤ 3.5 V at 50 A). The SMBJ150CA-E3/52 is used where voltage transients may swing positive or negative relative to ground - such as AC signal lines or floating buses - whereas SMBJ150A-E3/52 suits fixed-polarity DC rails. Both share identical VWM, VBR, VC, and PPPM.
What is the thermal resistance of SMBJ150CA-E3/52, and how does it affect layout?
The SMBJ150CA-E3/52 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. This means each watt of sustained power dissipation raises junction temperature by ~100 °C above ambient - so for reliable operation near its 5.0 W power rating, PCB layout must maximize copper area and minimize trace length. Thermal vias under pads and internal ground planes further reduce effective RθJA. The SMBJ150CA-E3/52's RθJL is 20 °C/W, confirming lead-to-board conduction dominates cooling.
Does SMBJ150CA-E3/52 meet any safety certifications?
Yes - SMBJ150CA-E3/52 is UL Recognized under file E136766 for protector classification per UL 497B, covering both unidirectional and bidirectional TVS diodes. This certification validates its suitability in telecom, industrial, and consumer equipment requiring third-party safety approval. It also meets MSL Level 1 per J-STD-020 (peak reflow 260 °C), ensuring robustness during lead-free assembly. The SMBJ150CA-E3/52 carries no CE marking or IEC 61000-4-5 certification itself - those apply at system level, but its parameters enable compliance when correctly implemented.
SMBJ150CA-E3/52 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):
- 150V
- Voltage - Breakdown (Min):
- 167V
- Voltage - Clamping (Max) @ Ipp:
- 243V
- Current - Peak Pulse (10/1000µs):
- 2.5A
- 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)
SMBJ150CA-E3/52 FAQ
1.How can I place an order for SMBJ150CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ150CA-E3/52 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 SMBJ150CA-E3/52 reliable?
The price and inventory of SMBJ150CA-E3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ150CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ150CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ150CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ150CA-E3/52?
SMBJ150CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ150CA-E3/52 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 SMBJ150CA-E3/52?
For technical support, including SMBJ150CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ150CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ150CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ150CA-E3/52 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 SMBJ150CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ150CA-E3/52?
All SMBJ150CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ150CA-E3/52, 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 SMBJ150CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ150CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ150CA-E3/52 Tags
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