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Vishay General Semiconductor - Diodes Division SMBJ28CA-E3/5B
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- Part No.:
- SMBJ28CA-E3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CA-E3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:1,534
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Product details
Overview
SMBJ28CA-E3/5B 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 - deployed in industrial sensor interfaces and telecom line protection.
For engineers reviewing the SMBJ28CA-E3/5B datasheet, SMBJ28CA-E3/5B pinout, SMBJ28CA-E3/5B application, or SMBJ28CA-E3/5B equivalent, key selection criteria include bidirectional clamping capability, low clamping ratio (VC/VWM = 1.62), MSL Level 1 moisture sensitivity, and RoHS-compliant matte tin terminations suitable for automated SMT assembly.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical electrical characteristics in forward and reverse directions per ANSI/IEEE C62.35. Its glass-passivated junction enables fast response time (<1 ns) and low incremental surge resistance, critical for suppressing ESD and lightning-induced surges on unprotected I/O lines.
The device is rated for -55 °C to +150 °C operating junction temperature, with thermal resistance RθJA = 100 °C/W (on 0.2" × 0.2" copper pads) and RθJL = 20 °C/W. It meets UL 497B recognition (QVGQ2) and is RoHS-compliant per base P/N-E3 designation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse stand-off voltage before significant leakage; defines safe operating margin below clamping threshold. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Verified breakdown range ensures reliable triggering without premature conduction under normal operation. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamping voltage during 600 W transient limits downstream IC stress to safe levels per IEC 61000-4-5. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform supports robust protection against inductive switching and EFT events. |
| ID @ VWM | 1.0 µA max - Ultra-low reverse leakage preserves signal integrity and minimizes standby power loss in high-impedance circuits. |
| TJ max | +150 °C - High junction temperature rating enables use in thermally demanding industrial and automotive-adjacent environments. |
| Package | SMB (DO-214AA) - Low-profile SMT package with 5.59 mm × 4.06 mm footprint, optimized for automated placement and board space efficiency. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking. Cathode/anode terminals are symmetrical; device functions identically regardless of orientation across the protected line.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Both terminals serve as interchangeable surge current entry/exit points; no polarity dependency enables simplified PCB layout. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Identical VBR, VC, and IPPM in both directions eliminates need for orientation-aware placement on AC or differential lines. |
| 600 W peak pulse power | Handles high-energy transients per IEC 61000-4-5 Level 4 (4 kV EFT) without degradation when mounted per recommended pad layout. |
| MSL Level 1 rating | Zero floor life limitation at ≤30 °C/60% RH - supports indefinite storage and reflow compatibility up to 260 °C peak without baking. |
| Glass passivated junction | Ensures stable VBR tolerance (±5%), low leakage, and long-term reliability under repeated surge stress. |
| UL 497B recognized | Validated for telecom and data line protection per Underwriters Laboratories safety standard QVGQ2 (file E136766). |
Applications
| Industrial Sensor Interface | Telecom Data Line Protection |
|---|---|
|
Use Scenario: Protecting RS-485 transceivers and analog sensor outputs (e.g., 4–20 mA loops) from inductive kickback and ESD in factory automation systems. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential pair or signal-to-ground to clamp transients before they reach sensitive input stages. Use Value: Limits clamped voltage to 45.4 V while absorbing 600 W surges, preventing latch-up or gate oxide damage in transceivers operating at ±12 V common-mode range. |
Use Scenario: Shielding Ethernet PHY interfaces and DSL line drivers from lightning-induced surges and hot-plug ESD in network edge equipment. IC Role / Device Role / Timing Role: Placed between transformer secondary and PHY IC to suppress common-mode transients without affecting signal integrity at 100 Mbps. Use Value: Sub-1 ns response time and 1.0 µA leakage preserve signal fidelity and DC bias stability while meeting GR-1089-CORE Level 3 surge requirements. |
| Automotive Body Control Module | Consumer USB Port Protection |
|
Use Scenario: Safeguarding LIN bus nodes and switch inputs in body control modules exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Connected line-to-ground on 12 V supply rails and LIN signal lines to shunt energy during battery disconnect events. Use Value: Withstands 150 °C junction temperature and delivers consistent clamping performance across automotive temperature range (-40 °C to +125 °C ambient). |
Use Scenario: Guarding USB 2.0 D+/D− lines against human-body-model (HBM) ESD and cable discharge events in portable electronics. IC Role / Device Role / Timing Role: Bidirectional placement across differential data pair to suppress ±8 kV contact ESD per IEC 61000-4-2 without signal distortion. Use Value: 45.4 V clamping voltage ensures downstream USB transceiver remains within absolute maximum ratings during transient events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28CA-M3/5B | Halogen-free, RoHS-compliant variant with identical electrical specs and SMB package; same thermal and clamping performance. | No functional difference; selected where halogen-free compliance is mandated by end-equipment environmental policy. | Choose SMBJ28CA-M3/5B when halogen-free materials are required for final product certification (e.g., EU EcoDesign). |
| SMCJ28CA-E3/57T | Higher-power 1500 W version in larger SMC (DO-214AB) package; VWM = 28 V, VC = 45.4 V, but IPPM = 33.0 A - same clamping voltage, higher surge capacity. | Used where higher single-event energy (e.g., direct lightning coupling) exceeds 600 W capability of SMBJ series. | Choose SMCJ28CA-E3/57T only when board space allows larger SMC package and system-level testing confirms need for >600 W rating. |
Compared with SMBJ28CA-E3/5B, SMBJ28CA-M3/5B offers identical protection performance with halogen-free construction, while SMCJ28CA-E3/57T provides triple the peak pulse power in a larger footprint - enabling trade-offs between board area, environmental compliance, and surge severity requirements.
Availability
SMBJ28CA-E3/5B is available at Aetrix Electronics and suitable for industrial sensor interfaces, telecom data line protection, automotive body control modules, and consumer USB port protection requiring stable component supply and full traceability.
Supply support for SMBJ28CA-E3/5B 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, MOSFETs, and protection devices with emphasis on reliability, precision, and application-specific optimization.
The SMBJ series is engineered for robust transient suppression in space-constrained, high-reliability applications - targeting industrial, telecom, and automotive-qualified designs where consistent clamping and long-term stability are critical.
FAQ
What is the clamping voltage of SMBJ28CA-E3/5B at its rated peak pulse current?
The SMBJ28CA-E3/5B has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 13.2 A, measured using a 10/1000 µs waveform. This value is confirmed in the Vishay datasheet (Document Number: 88392, Revision: 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during transient events. The SMBJ28CA-E3/5B maintains this clamping performance bidirectionally.
Is SMBJ28CA-E3/5B suitable for automotive applications?
The SMBJ28CA-E3/5B itself is commercial-grade (E3 suffix), not AEC-Q101 qualified. However, Vishay offers the functionally identical SMBJ28CAHE3_B variant (with HE3 suffix) that is AEC-Q101 qualified for automotive use. For non-automotive applications such as industrial controls or telecom infrastructure, the SMBJ28CA-E3/5B is fully appropriate and widely deployed. Always verify qualification status via the full part number.
What does the "CA" suffix indicate in SMBJ28CA-E3/5B?
The "CA" suffix in SMBJ28CA-E3/5B denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression in both polarities, with identical breakdown and clamping characteristics in forward and reverse directions. This is distinct from unidirectional "A" variants (e.g., SMBJ28A), which conduct only in reverse bias and require correct cathode orientation. The SMBJ28CA-E3/5B requires no polarity alignment during placement.
What is the maximum operating temperature for SMBJ28CA-E3/5B?
The SMBJ28CA-E3/5B has a maximum junction temperature (TJ) rating of +150 °C and an operating ambient temperature range of -55 °C to +150 °C. Its thermal resistance is RθJA = 100 °C/W when mounted on 0.2" × 0.2" copper pads per JEDEC standards. This enables reliable operation in high-temperature industrial enclosures and under sustained power dissipation up to 5.0 W.
How does SMBJ28CA-E3/5B compare to SMAJ28CA in terms of power handling?
The SMBJ28CA-E3/5B delivers 600 W peak pulse power (10/1000 µs), whereas the SMAJ28CA (in smaller SMA/DO-214AC package) is rated for 400 W. Both share identical VWM (28 V), VBR, and VC (45.4 V), but the SMBJ's larger SMB package enables higher surge current handling (13.2 A vs. 8.8 A) and lower thermal resistance - making SMBJ28CA-E3/5B preferable where higher energy transients are expected or board layout allows the slightly larger footprint.
SMBJ28CA-E3/5B 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):
- 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-E3/5B FAQ
1.How can I place an order for SMBJ28CA-E3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CA-E3/5B 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 SMBJ28CA-E3/5B reliable?
The price and inventory of SMBJ28CA-E3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CA-E3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ28CA-E3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CA-E3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CA-E3/5B?
SMBJ28CA-E3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CA-E3/5B 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 SMBJ28CA-E3/5B?
For technical support, including SMBJ28CA-E3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CA-E3/5B requirements.
6.How does Aetrix verify that SMBJ28CA-E3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ28CA-E3/5B 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 SMBJ28CA-E3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ28CA-E3/5B?
All SMBJ28CA-E3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CA-E3/5B, 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 SMBJ28CA-E3/5B part is unused and in its original packaging.
Return procedure for SMBJ28CA-E3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CA-E3/5B Tags
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