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Vishay General Semiconductor - Diodes Division SMBJ15CA-E3/52
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- Part No.:
- SMBJ15CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ15CA-E3/52.pdf
- Description:
- TVS DIODE 15VWM 24.4VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,363
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Product details
Overview
SMBJ15CA-E3/52 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 or power lines. It features a 15 V stand-off voltage (VWM), 24.4 V maximum clamping voltage at 24.6 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor signal lines in industrial and telecom equipment.
For engineers reviewing the SMBJ15CA-E3/52 datasheet, SMBJ15CA-E3/52 pinout, SMBJ15CA-E3/52 application, or SMBJ15CA-E3/52 equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (1.63× VWM), MSL Level 1 moisture sensitivity, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical breakdown behavior in both polarities due to its bidirectional construction. Its glass-passivated junction ensures stable avalanche characteristics and fast response time (<1 ns), enabling effective suppression of ESD, lightning-induced surges, and inductive switching transients.
The SMBJ15CA-E3/52 delivers 600 W peak pulse power handling under standardized 10/1000 µs waveform conditions, with thermal resistance RθJA = 100 °C/W and operating junction temperature range from –55 °C to +150 °C - supporting reliable operation in harsh ambient environments without forced cooling.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 15 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR Min/Max (Breakdown Voltage) | 16.7 V / 18.5 V at 1 mA - Ensures consistent avalanche initiation across production lots and temperature |
| VC (Clamping Voltage) | 24.4 V at IPPM = 24.6 A - Limits transient voltage seen by protected circuitry to safe levels during surge events |
| PPPM (Peak Pulse Power) | 600 W (10/1000 µs) - Specifies maximum transient energy absorption capability per single event |
| ID (Reverse Leakage) | 1.0 µA max at VWM - Confirms minimal standby power loss and signal integrity preservation |
| Package | SMB (DO-214AA) - Standardized 2-pin surface-mount outline with 5.0 mm × 5.0 mm copper pad requirement for thermal performance |
| MSL Rating | Level 1 (J-STD-020), peak reflow 260 °C - Enables compatibility with standard lead-free reflow profiles without preconditioning |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve identical roles in bidirectional clamping; no cathode band marking required |
| Case (body) | Thermal and mechanical interface | Plastic body provides electrical isolation; requires 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal for rated power dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC-coupled or floating signal lines without polarity concerns - e.g., RS-485, CAN, USB D+/D− |
| 600 W peak pulse power | Supports IEC 61000-4-5 Level 4 surge immunity (4 kV line-to-line) when properly laid out with recommended PCB copper area |
| Glass-passivated junction | Ensures long-term stability of breakdown voltage and low parameter drift over temperature and lifetime |
| Low clamping ratio (VC/VWM = 1.63) | Minimizes overvoltage stress on downstream components compared to higher-ratio TVS devices |
| RoHS-compliant, matte tin terminations | Guarantees solderability per J-STD-002 and whisker resistance per JESD 201 Class 2 for high-reliability assembly |
Applications
| Industrial Sensor Interface Protection | Telecom Line Card Surge Protection |
|---|---|
Use Scenario: Protecting analog output lines (4–20 mA) and digital I/O of PLC modules from field-wiring induced transients. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal and return paths to limit transient excursions. Use Value: Prevents latch-up or permanent damage to precision op-amps and ADCs during load dump or ground bounce events. |
Use Scenario: Shielding Ethernet PHY interfaces and POTS line drivers against lightning-induced surges in central office equipment. IC Role / Device Role / Timing Role: Primary front-end transient suppressor on differential pair inputs before isolation transformers. Use Value: Maintains signal integrity while absorbing up to 600 W of surge energy without degradation over repeated events. |
| Automotive Body Control Module (BCM) | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding LIN bus transceivers and microcontroller GPIOs from battery reverse connection and load dump spikes. IC Role / Device Role / Timing Role: Secondary-level TVS deployed after primary fusing to handle residual transients missed by upstream protection. Use Value: Complies with AEC-Q101 qualification when ordered as HE3 variant; supports extended temperature operation up to +150 °C junction. |
Use Scenario: Clamping flyback voltages generated by brushed DC motor commutation in washing machine control boards. IC Role / Device Role / Timing Role: Parallel-connected TVS across motor terminals to suppress inductive kickback exceeding MOSFET VDSS. Use Value: Reduces electromagnetic interference (EMI) radiated from motor leads and prevents gate oxide failure in half-bridge drivers. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ15CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package | No difference in circuit function or layout; selected where halogen-free compliance is mandated | Choose for environmental compliance programs requiring halogen-free materials without performance trade-offs |
| SMCJ15CA-E3/52 | Same VWM and VC but in larger SMC (DO-214AB) package with 1500 W PPPM rating | Higher surge capacity suits applications with more severe threat levels (e.g., outdoor telecom cabinets) | Select when system-level surge testing exceeds 600 W requirements or when board space allows larger footprint |
Compared with SMBJ15CA-E3/52, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ15CA-E3/52 provides 2.5× higher pulse power handling in a physically larger package - enabling design flexibility between footprint constraints and surge margin.
Availability
SMBJ15CA-E3/52 is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom line cards, automotive body control modules, and consumer appliance motor drives requiring stable component supply and repeatable surge protection performance.
Supply support for SMBJ15CA-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, efficiency, and application-specific optimization.
The SMBJ series was developed specifically for surface-mount transient suppression in space-constrained, high-volume applications - balancing robust surge capability, automated assembly compatibility, and thermal performance in compact SMB packaging.
FAQ
What is the clamping voltage of SMBJ15CA-E3/52 at its rated peak pulse current?
The SMBJ15CA-E3/52 has a maximum clamping voltage (VC) of 24.4 V when subjected to its peak pulse current (IPPM) of 24.6 A under the standard 10/1000 µs waveform. This value is measured per JEDEC test conditions and guarantees the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMBJ15CA-E3/52 suitable for bidirectional signal line protection?
Yes, SMBJ15CA-E3/52 is explicitly designed for bidirectional applications, as indicated by the "CA" suffix and confirmed in Vishay's documentation. Its symmetrical breakdown characteristics allow it to clamp transients of either polarity equally - making it ideal for protecting differential buses like RS-485, CAN, or audio lines without polarity-sensitive placement.
Does SMBJ15CA-E3/52 meet automotive qualification standards?
The base SMBJ15CA-E3/52 is commercial-grade and not AEC-Q101 qualified; however, Vishay offers the automotive variant SMBJ15CAHE3_B/H with identical electrical specs and full AEC-Q101 qualification. Engineers requiring automotive use must specify the HE3 suffix and appropriate revision code to ensure compliance with automotive reliability and testing requirements.
What is the thermal resistance of SMBJ15CA-E3/52, and how does it affect PCB layout?
The SMBJ15CA-E3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W when mounted on minimum recommended 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal. To maintain safe junction temperatures under repetitive surge conditions, designers must adhere to this pad layout - reducing thermal resistance further requires additional copper area or internal layers connected via vias.
How does the leakage current of SMBJ15CA-E3/52 impact low-power sensor circuits?
SMBJ15CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 15 V stand-off voltage (VWM), which introduces negligible loading in typical sensor signal chains - for example, adding less than 15 µV offset across a 15 kΩ source impedance. This low leakage preserves accuracy in precision analog front-ends and battery-powered IoT sensor nodes where quiescent current budget is tightly constrained.
SMBJ15CA-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):
- 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-E3/52 FAQ
1.How can I place an order for SMBJ15CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ15CA-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 SMBJ15CA-E3/52 reliable?
The price and inventory of SMBJ15CA-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 SMBJ15CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ15CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ15CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ15CA-E3/52?
SMBJ15CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ15CA-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 SMBJ15CA-E3/52?
For technical support, including SMBJ15CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ15CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ15CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ15CA-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 SMBJ15CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ15CA-E3/52?
All SMBJ15CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ15CA-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 SMBJ15CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ15CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ15CA-E3/52 Tags
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