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Vishay General Semiconductor - Diodes Division SMBJ28C-E3/52
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- Part No.:
- SMBJ28C-E3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28C-E3/52.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,365
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Product details
Overview
SMBJ28C-E3/52 from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMB (DO-214AA) package, designed for robust overvoltage protection of sensitive electronics. 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 on power rails and signal lines in industrial motor drives.
For engineers reviewing the SMBJ28C-E3/52 datasheet, SMBJ28C-E3/52 pinout, SMBJ28C-E3/52 application, or SMBJ28C-E3/52 equivalent, this page delivers verified electrical parameters, thermal derating behavior, clamping performance under surge conditions, RoHS-compliant commercial-grade construction, and direct alternatives for ESD/lightning transient suppression in DC power interfaces.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: when reverse voltage exceeds VWM = 28 V, it avalanches to limit transient energy by diverting surge current to ground. Its low incremental surge resistance ensures stable clamping during repetitive transients, and its glass-passivated junction enables fast response time (<1 ps) to sub-microsecond spikes.
The device is rated for 150 °C maximum junction temperature, exhibits 0.098 %/°C temperature coefficient of VBR, and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak. It is not AEC-Q101 qualified (suffix lacks HE3/HM3), and polarity is marked by cathode band - critical for correct orientation in unidirectional DC protection circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins; sets upper limit for protected line's nominal DC voltage. |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - guaranteed avalanche initiation range; determines minimum overvoltage threshold for protection activation. |
| VC @ IPPM | 45.4 V at 13.2 A - maximum clamped voltage during 10/1000 µs surge; defines worst-case voltage seen by downstream ICs during transient. |
| PPPM | 600 W - peak pulse power handling capability; supports high-energy surges such as IEC 61000-4-5 Level 3 (1 kV/2 Ω) on 24 V systems. |
| IPPM | 13.2 A - peak pulse current corresponding to VC; used with PCB trace impedance to estimate actual clamping margin. |
| TJ max | 150 °C - maximum junction temperature; requires thermal pad design per 0.2" × 0.2" copper pads to sustain repetitive surges. |
| RθJA | 100 °C/W - junction-to-ambient thermal resistance; confirms need for copper pour or heatsinking in high-duty-cycle applications. |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002. Cathode indicated by molded band; anode is unmarked end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink node | Connected to protected line; conducts surge current to ground when VLINE > VBR. |
| Anode (unbanded end) | Reference/ground return path | Must be tied to low-impedance system ground; forms shunt path for clamped energy dissipation. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Enables single-device protection against IEC 61000-4-5 surges up to 1 kV on 24 V DC bus without cascaded stages. |
| 45.4 V clamping voltage at 13.2 A | Provides ≥10 V margin below typical 55 V absolute maximum rating of 24 V-rated MOSFETs and controllers. |
| Glass passivated junction | Ensures stable leakage (<1 µA at 28 V) and long-term reliability under thermal cycling and humidity exposure. |
| MSL Level 1, 260 °C peak reflow | Supports standard lead-free SMT assembly without pre-baking or special handling requirements. |
| RoHS-compliant, commercial grade (E3 suffix) | Meets global environmental compliance for industrial and consumer equipment without halogen restrictions. |
Applications
| Industrial PLC I/O Protection | 24 V DC Motor Drive Power Input |
|---|---|
|
Use Scenario: Protecting digital input modules from inductive kickback during solenoid switching and relay coil de-energization. IC Role / Device Role / Timing Role: Shunt clamping element placed across input terminals to clamp transients before they reach optocoupler or MCU GPIO. Use Value: Limits voltage to ≤45.4 V during 13.2 A surges, preventing latch-up or gate oxide damage in 3.3 V/5 V logic interfaces. |
Use Scenario: Safeguarding H-bridge gate drivers and current-sense amplifiers from back-EMF spikes during motor commutation. IC Role / Device Role / Timing Role: Parallel-connected TVS on main 24 V supply rail upstream of bulk capacitor and regulator inputs. Use Value: Clamps 600 W transients within 1 ns, maintaining <50 V rail integrity during 10 ms motor stall events. |
| Telecom Power Feeds | Automotive Body Control Module (BCM) Inputs |
|
Use Scenario: Securing PoE-powered remote units against lightning-induced surges on 24–48 V DC feed lines. IC Role / Device Role / Timing Role: First-stage transient suppressor before DC-DC converter input, sized for 10/1000 µs waveform compliance. Use Value: Withstands 13.2 A peak current while holding clamped voltage below 50 V - preserving isolation barrier integrity. |
Use Scenario: Protecting LIN bus transceivers and sensor inputs from load dump and jump-start transients in 12 V vehicle subsystems. IC Role / Device Role / Timing Role: Unidirectional TVS on VBAT-referenced signal lines where negative transients are blocked by system grounding. Use Value: Delivers 28 V stand-off with 45.4 V clamping - compatible with 36 V max-rated automotive ICs and avoids false triggering. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-E3/52 | Same VWM, VBR, VC, and package; identical electrical specs - "A" suffix denotes same unidirectional variant as "C" in Vishay's legacy marking convention. | No functional difference; both intended for DC line protection with cathode-grounded configuration. | Select SMBJ28A-E3/52 if sourcing from distributors listing only "A" suffix; electrically interchangeable with SMBJ28C-E3/52. |
| SMCJ28A-E3/52 | Same VWM and VBR, but higher PPPM = 1500 W and larger SMC (DO-214AB) package; VC = 48.4 V at 31.8 A. | Used where higher surge energy (e.g., IEC 61000-4-5 Level 4) or longer pulse duration must be absorbed. | Choose SMCJ28A-E3/52 only when 600 W is insufficient; requires PCB layout change due to larger footprint and thermal mass. |
Compared with SMBJ28C-E3/52, SMBJ28A-E3/52 offers identical protection performance in the same SMB package, while SMCJ28A-E3/52 trades compactness for 2.5× higher surge capacity - making the former ideal for space-constrained 24 V industrial designs, and the latter suitable for high-reliability automotive or telecom front-end stages.
Availability
SMBJ28C-E3/52 is available at Aetrix Electronics and suitable for industrial PLC I/O protection, 24 V DC motor drive power inputs, and telecom power feed applications requiring stable component supply, consistent RoHS-compliant manufacturing, and full traceability from Vishay General Semiconductor.
Supply support for SMBJ28C-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 is engineered for surface-mount transient suppression in harsh environments - targeting industrial automation, power supplies, and communication infrastructure where fast-response, high-power clamping is essential.
FAQ
What is the clamping voltage of SMBJ28C-E3/52 at its rated peak pulse current?
The SMBJ28C-E3/52 has a maximum clamping voltage (VC) of 45.4 V at 13.2 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBJ28C-E3/52 maintains this clamping performance across its specified operating temperature range, ensuring predictable protection behavior in real-world 24 V DC systems.
Is SMBJ28C-E3/52 suitable for bidirectional transient suppression?
No, SMBJ28C-E3/52 is a unidirectional TVS diode - it conducts only in reverse bias above VBR and blocks forward current like a standard diode. For bidirectional protection, Vishay specifies the CA suffix (e.g., SMBJ28CA). Using SMBJ28C-E3/52 on AC-coupled or floating lines without proper polarity alignment may result in unintended conduction or failure to suppress negative transients. Always verify polarity during PCB layout for SMBJ28C-E3/52.
Does SMBJ28C-E3/52 meet automotive qualification standards?
No, SMBJ28C-E3/52 is a commercial-grade part with E3 suffix and is not AEC-Q101 qualified. Automotive-grade variants require HE3 or HM3 suffixes (e.g., SMBJ28AHE3_B). The SMBJ28C-E3/52 lacks the extended temperature validation, stress testing, and traceability required for automotive applications. For BCM or infotainment systems, specify the HE3 version to ensure compliance with AEC-Q101 - the SMBJ28C-E3/52 remains appropriate for industrial and telecom use only.
What is the thermal resistance and recommended PCB layout for SMBJ28C-E3/52?
The SMBJ28C-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. To maintain safe operation under repetitive surges, use minimum pad dimensions matching Vishay's recommended layout - including thermal vias to inner ground planes if ambient temperatures exceed 70 °C. The SMBJ28C-E3/52's RθJL of 20 °C/W further supports heat transfer through leads into copper pours.
How does the leakage current of SMBJ28C-E3/52 compare at its stand-off voltage?
At its 28 V stand-off voltage (VWM), the SMBJ28C-E3/52 exhibits a maximum reverse leakage current (ID) of 1.0 µA at 25 °C - well below thresholds that could affect low-power sensor or battery-backed circuits. Leakage remains below 5 µA up to 125 °C, ensuring minimal impact on standby power budgets. This low ID is enabled by the device's glass-passivated junction and makes SMBJ28C-E3/52 suitable for always-on monitoring nodes where quiescent current matters.
SMBJ28C-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:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 12A
- 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)
SMBJ28C-E3/52 FAQ
1.How can I place an order for SMBJ28C-E3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28C-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 SMBJ28C-E3/52 reliable?
The price and inventory of SMBJ28C-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 SMBJ28C-E3/52 is usually 5 days.
3.What payment methods are accepted for SMBJ28C-E3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28C-E3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28C-E3/52?
SMBJ28C-E3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28C-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 SMBJ28C-E3/52?
For technical support, including SMBJ28C-E3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28C-E3/52 requirements.
6.How does Aetrix verify that SMBJ28C-E3/52 is sourced from the original manufacturer or authorized distributors?
All SMBJ28C-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 SMBJ28C-E3/52 meets industry standards.
7.What is the process for return or replacement of SMBJ28C-E3/52?
All SMBJ28C-E3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28C-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 SMBJ28C-E3/52 part is unused and in its original packaging.
Return procedure for SMBJ28C-E3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28C-E3/52 Tags
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