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Vishay General Semiconductor - Diodes Division SMBJ28CA-E3/52
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- Part No.:
- SMBJ28CA-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CA-E3/52.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:3,425
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Product details
Overview
SMBJ28CA-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 and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 45.4 V maximum clamping voltage (VC) at 13.2 A peak pulse current, and 600 W peak pulse power rating with 10/1000 µs waveform - used to protect MOSFETs, ICs, and sensor interfaces in industrial motor drives.
For engineers reviewing the SMBJ28CA-E3/52 datasheet, SMBJ28CA-E3/52 pinout, SMBJ28CA-E3/52 application, or SMBJ28CA-E3/52 equivalent, this device is evaluated for bidirectional surge suppression in DC power rails, automotive body electronics, telecom line protection, and I/O port ESD hardening where low-leakage (<1.0 µA at VWM) and fast response (<1 ns) are required.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, enabling transient suppression without polarity sensitivity - critical for AC-coupled lines or floating differential buses. Its glass-passivated junction ensures stable VBR tolerance (±5%) and low temperature coefficient (0.098 %/°C), while MSL Level 1 moisture sensitivity supports lead-free reflow up to 260 °C.
The device delivers 45.4 V clamping at 13.2 A (10/1000 µs), with <1.0 µA reverse leakage at 28 V and thermal resistance of 100 °C/W (junction-to-ambient). It is rated for -55 °C to +150 °C operating junction temperature and meets UL 497B recognition (QVGQ2) for protector classification.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before conduction begins; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown range ensuring predictable turn-on during overvoltage events. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage seen by protected circuit during 600 W transient; limits stress on downstream components. |
| IPPM | 13.2 A - Peak pulse current capability under 10/1000 µs waveform; determines survivability against common lightning/surge standards. |
| PPPM | 600 W - Peak pulse power handling capacity; enables robust protection in industrial and telecom environments per IEC 61000-4-5. |
| ID @ VWM | <1.0 µA - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - Maximum junction temperature supporting operation in under-hood automotive or enclosed industrial enclosures. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking - symmetrical anode/cathode terminals.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity event) | Conducts during negative-going surges; forms one half of bidirectional clamping path. |
| Cathode | Transient current entry (positive polarity event) | Conducts during positive-going surges; completes symmetrical clamping behavior with Anode terminal. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC signals or ungrounded lines without polarity constraints. |
| 600 W peak pulse power (10/1000 µs) | Meets IEC 61000-4-5 Level 3 (1 kV/2 kV surge) requirements for industrial equipment interfaces. |
| Low clamping ratio (VC/VBR ≈ 1.39) | Minimizes voltage overshoot during transients, reducing risk of latch-up or gate oxide damage in protected MOSFETs/ICs. |
| MSL Level 1, 260 °C reflow compatible | Supports standard lead-free SMT assembly without pre-baking or special handling. |
| UL 497B recognized (QVGQ2) | Validates suitability for telecom and data line protection in certified end-equipment designs. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Protection of gate drivers and microcontroller I/O pins from inductive kickback during relay or solenoid switching. IC Role / Device Role / Timing Role: Bidirectional TVS placed across power rail inputs and signal lines to clamp sub-100 ns transients. Use Value: Limits voltage excursion to ≤45.4 V during 13.2 A surges, preventing MOSFET avalanche failure and MCU reset corruption. |
Use Scenario: Surge suppression on LIN bus and sensor supply lines exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS absorbing repetitive 10/1000 µs pulses up to 600 W without degradation. Use Value: Maintains <1.0 µA leakage at 28 V system voltage, avoiding battery drain while surviving ISO 7637-2 Pulse 1/2/5a. |
| Telecom Line Interfaces | Consumer Sensor Hubs |
|
Use Scenario: DC power feed protection for PoE-powered remote units subjected to lightning-induced surges on twisted-pair cables. IC Role / Device Role / Timing Role: Primary clamping device on secondary-side DC output, coordinated with upstream GDT or MOV. Use Value: Achieves 45.4 V clamping at 13.2 A with 0.098 %/°C VBR drift, ensuring stable protection across -40 °C to +85 °C ambient. |
Use Scenario: ESD and EFT hardening of I²C/SPI lines connecting MEMS accelerometers, gyroscopes, and environmental sensors. IC Role / Device Role / Timing Role: Low-capacitance TVS (typ. <100 pF) placed directly at connector or IC pad to shunt fast transients. Use Value: Responds in <1 ns to ±8 kV contact ESD (IEC 61000-4-2), limiting voltage to <45.4 V and preserving signal integrity at 400 kHz bus speeds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-M3/52 | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package. | No functional difference; selected when halogen-free compliance is mandated by OEM sustainability requirements. | Direct material substitution where halogen content must be minimized; same layout and thermal performance. |
| SMCJ28CA-E3/52 | Same VWM/VBR/VC, but in larger SMC (DO-214AB) package with 1500 W PPPM. | Used where higher surge energy (e.g., IEC 61000-4-5 Level 4) or improved thermal dissipation is required. | Choose when board space allows larger footprint and 2.5× higher pulse power is needed; not pin-compatible. |
Compared with SMBJ28CA-E3/52, the M3 variant offers identical protection performance with halogen-free construction, while the SMCJ28CA-E3/52 provides higher surge robustness in a non-interchangeable package - selection depends on compliance mandates and energy-level requirements, not electrical compatibility.
Availability
SMBJ28CA-E3/52 is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom line interfaces, and consumer sensor hubs requiring stable component supply and consistent surge performance across production batches.
Supply support for SMBJ28CA-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 and application-specific optimization.
The SMBJ series targets surface-mount transient suppression in space-constrained, high-reliability applications - engineered for fast response, low clamping, and compatibility with automated assembly processes.
FAQ
What is the clamping voltage of SMBJ28CA-E3/52 at its rated peak pulse current?
The SMBJ28CA-E3/52 has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ28CA-E3/52 maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is SMBJ28CA-E3/52 suitable for automotive applications?
The SMBJ28CA-E3/52 is commercial-grade and not AEC-Q101 qualified; however, it is widely used in non-safety-critical automotive subsystems such as infotainment power supplies and sensor interfaces. For AEC-Q101-compliant versions, Vishay offers SMBJ28CAHE3_B/H - the SMBJ28CA-E3/52 itself lacks automotive qualification documentation and should not be deployed in safety-related ECUs without additional validation.
How does the bidirectional design of SMBJ28CA-E3/52 affect its PCB layout?
The SMBJ28CA-E3/52 has no polarity marking and symmetrical terminal behavior, allowing placement without orientation constraints - simplifying automated assembly and enabling use on AC-coupled or floating nodes. Unlike unidirectional TVS diodes, the SMBJ28CA-E3/52 requires no cathode band alignment, eliminating risk of reverse installation and reducing inspection overhead in high-volume manufacturing.
What is the maximum reverse leakage current for SMBJ28CA-E3/52 at its working voltage?
At its 28 V stand-off voltage (VWM), the SMBJ28CA-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C. This ultra-low leakage ensures minimal impact on high-impedance sensor bias networks and battery-powered circuits, preserving accuracy and extending operational life. Leakage remains below 5.0 µA even at 125 °C junction temperature.
Does SMBJ28CA-E3/52 meet any safety certifications?
Yes, the SMBJ28CA-E3/52 is Underwriters Laboratories (UL) recognized under standard UL 497B for protector classification, with file number E136766. This certification validates its suitability for use in telecom and data line protection applications where regulatory compliance is required. The device also complies with RoHS Directive 2011/65/EU and meets JESD201 Class 2 whisker resistance requirements.
SMBJ28CA-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):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 45.5V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBJ28CA-E3/52 FAQ
1.How can I place an order for SMBJ28CA-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CA-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 SMBJ28CA-E3/52 reliable?
The price and inventory of SMBJ28CA-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 SMBJ28CA-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ28CA-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CA-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CA-E3/52?
SMBJ28CA-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CA-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 SMBJ28CA-E3/52?
For technical support, including SMBJ28CA-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CA-E3/52 requirements.
6.How does Aetrix verify that SMBJ28CA-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ28CA-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 SMBJ28CA-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ28CA-E3/52?
All SMBJ28CA-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CA-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 SMBJ28CA-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ28CA-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CA-E3/52 Tags
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