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Vishay General Semiconductor - Diodes Division SMBJ28CHE3/5B
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- Part No.:
- SMBJ28CHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CHE3/5B.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:4,998
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Product details
Overview
SMBJ28CHE3/5B from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode designed for robust overvoltage protection of DC power rails and signal lines. It features a 28 V standoff voltage (VWM), 31.1–34.4 V breakdown range (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 motor drives to safeguard MOSFET gate drivers against inductive switching transients.
For engineers reviewing the SMBJ28CHE3/5B datasheet, SMBJ28CHE3/5B pinout, SMBJ28CHE3/5B application, or SMBJ28CHE3/5B equivalent, key selection criteria include its AEC-Q101 qualification, SMB (DO-214AA) package compatibility with automated SMT placement, low incremental surge resistance, and verified clamping performance under repetitive 0.01% duty cycle surges.
Technical Context
This TVS operates as a unidirectional avalanche clamp: reverse-biased during normal operation, it remains high-impedance until VWM = 28 V is exceeded, then rapidly transitions to low-impedance conduction above VBR = 31.1–34.4 V to divert transient energy. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repeated surge stress.
Thermal design relies on RθJA = 100 °C/W (typ.) and RθJL = 20 °C/W (typ.), enabling effective heat dissipation when mounted on 5.0 mm × 5.0 mm copper pads per terminal. The device supports continuous operation from –55 °C to +150 °C junction temperature and meets MSL Level 1 per J-STD-020 with 260 °C reflow peak.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping initiates; defines safe DC rail margin for 24 V systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range; ensures predictable turn-on across production lot and temperature. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 10/1000 µs surge; limits downstream IC stress to sub-46 V during worst-case transients. |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; supports protection against IEC 61000-4-5 Level 4 surges. |
| IFSM | 100 A - Non-repetitive forward surge rating (8.3 ms half-sine); enables resilience against accidental polarity reversals or latch-up events. |
| TJ max | +150 °C - Maximum junction temperature; allows deployment in under-hood automotive or high-ambient industrial environments. |
| Package | SMB (DO-214AA) - Standardized surface-mount outline with 5.59 mm × 4.06 mm footprint and 2.20 mm height; compatible with JEDEC MS-012AC. |
Pinout & Package
Package: SMB (DO-214AA), molded plastic case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102; cathode indicated by band marking on unidirectional variants.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry / transient return path | Connected to system ground or low-side reference; completes clamping loop during reverse surge events. |
| Cathode | Protected line connection / high-side terminal | Connected to the line being protected (e.g., 24 V rail or sensor output); carries full surge current during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control units and ADAS power domains. |
| 600 W peak pulse power | Withstands 10/1000 µs transients up to 13.2 A without degradation - exceeds IEC 61000-4-5 open-circuit voltage requirements for industrial equipment. |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage overshoot during fast transients - critical for protecting 30 V-rated MOSFETs and logic-level interface ICs. |
| MSL Level 1 moisture sensitivity | Enables standard reflow assembly without baking - reduces manufacturing cost and avoids moisture-induced popcorn failure during PCB assembly. |
| Glass passivated junction | Ensures stable VBR tolerance and low leakage (<1 µA at VWM) over lifetime - essential for battery-powered sensor nodes requiring ultra-low standby current. |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC bus against back-EMF spikes generated by relay coil de-energization and brushed DC motor commutation. IC Role / Device Role / Timing Role: Unidirectional TVS placed between rail and ground, acting as fast-acting crowbar to clamp transients within 1 ns response time. Use Value: Limits voltage excursions to ≤45.4 V, preventing damage to gate drivers (e.g., IR2104) and microcontroller I/O pins rated for 30 V absolute maximum. |
Use Scenario: Safeguarding LIN bus transceivers and LED driver outputs in door modules exposed to load dump and jump-start conditions. IC Role / Device Role / Timing Role: Standoff-rated TVS on 12 V supply input, absorbing repetitive 10/1000 µs pulses with 0.01% duty cycle per ISO 7637-2 Pulse 1/2a. Use Value: Maintains <1 µA leakage at 28 V, preserving battery drain budget while delivering AEC-Q101-compliant surge immunity. |
| Telecom Power Supplies | Industrial PLC I/O Cards |
Use Scenario: Secondary-side overvoltage suppression on isolated 24 V DC-DC converter outputs feeding Ethernet PHYs and management controllers. IC Role / Device Role / Timing Role: Final-stage TVS on regulated output, coordinated with upstream MOVs and fuses to meet UL 60950-1 transient immunity requirements. Use Value: 600 W rating enables single-device coverage of both differential-mode and common-mode surges without derating penalties. |
Use Scenario: Input protection for analog current-loop (4–20 mA) transmitter circuits subjected to field wiring faults and electrostatic discharge. IC Role / Device Role / Timing Role: Low-capacitance unidirectional clamp on signal line, referenced to local ground with series current-limiting resistor. Use Value: Clamps to 45.4 V before op-amp input stages exceed absolute maximum ratings, preserving measurement accuracy and avoiding latch-up. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28AHE3/5B | No AEC-Q101 qualification; identical electrical specs and SMB package. | Restricted to commercial-grade industrial and telecom use; not approved for automotive ECUs or chassis modules. | Select when automotive qualification is unnecessary and cost optimization is prioritized. |
| SMCJ28AHE3/5B | Same VWM/VBR/VC, but SMC (DO-214AB) package - 7.11 mm × 6.22 mm footprint, 2.39 mm height, 1.5× higher PPPM (1500 W). | Supports higher-energy surges (e.g., IEC 61000-4-5 Level 5); requires larger PCB area and different stencil design. | Choose when system-level surge testing exceeds 600 W requirements or when thermal margin is constrained. |
Compared with SMBJ28AHE3/5B, the SMBJ28CHE3/5B adds AEC-Q101 validation for automotive deployment without altering electrical behavior; versus SMCJ28AHE3/5B, it trades 900 W extra pulse power for 30% smaller board area and tighter layout constraints in space-constrained modules.
Availability
SMBJ28CHE3/5B is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power supplies, and PLC I/O cards requiring stable component supply across extended product lifecycles.
Supply support for SMBJ28CHE3/5B 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, and protection devices with emphasis on reliability, precision, and application-specific qualification.
The SMBJ series targets high-reliability transient suppression in automotive, industrial, and telecom infrastructure - engineered for repeatable clamping performance, low leakage, and seamless SMT integration.
FAQ
What is the maximum clamping voltage of the SMBJ28CHE3/5B under a 10/1000 µs surge?
The SMBJ28CHE3/5B has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current of 13.2 A with a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for downstream 30 V-rated components in the SMBJ28CHE3/5B protection circuit.
Is SMBJ28CHE3/5B suitable for automotive applications?
Yes, SMBJ28CHE3/5B is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet under "Mechanical Data" and "Ordering Information." This certification covers stress tests including temperature cycling, high-temperature reverse bias, and ESD, making SMBJ28CHE3/5B appropriate for under-hood and chassis-mounted automotive modules such as body control units and lighting drivers.
What does the "HE3" suffix indicate in SMBJ28CHE3/5B?
The "HE3" suffix in SMBJ28CHE3/5B denotes RoHS-compliant construction with AEC-Q101 qualification - distinguishing it from commercial-grade "E3" variants. Per Vishay's ordering guide, "HE3" parts undergo additional automotive reliability screening while retaining identical electrical specifications and SMB (DO-214AA) mechanical form factor as the base SMBJ28A series.
How does SMBJ28CHE3/5B compare to bidirectional TVS diodes like SMBJ28CHE3/5B?
SMBJ28CHE3/5B is unidirectional and intended for DC rail protection where polarity is fixed; it offers lower leakage (<1 µA at 28 V) and higher surge current capability in one direction. Bidirectional variants (e.g., SMBJ28CHE3/5B with "CA" suffix) are not applicable here - the "A" in SMBJ28CHE3/5B confirms unidirectional configuration, with cathode marked by a band. Using a bidirectional part would compromise clamping efficiency on polarized lines.
What is the thermal resistance from junction to ambient for SMBJ28CHE3/5B?
The typical junction-to-ambient thermal resistance (RθJA) for SMBJ28CHE3/5B is 100 °C/W when mounted on 0.2" × 0.2" (5.0 mm × 5.0 mm) copper pads per terminal, as specified in the Vishay thermal characteristics table. This value assumes standard FR-4 PCB construction and guides heatsinking decisions - for example, limiting average power dissipation to ≤50 mW in still-air environments to maintain TJ < 125 °C in the SMBJ28CHE3/5B application.
SMBJ28CHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AA, SMB
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- 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:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMBJ)
SMBJ28CHE3/5B FAQ
1.How can I place an order for SMBJ28CHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CHE3/5B 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 SMBJ28CHE3/5B reliable?
The price and inventory of SMBJ28CHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBJ28CHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CHE3/5B?
SMBJ28CHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CHE3/5B 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 SMBJ28CHE3/5B?
For technical support, including SMBJ28CHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CHE3/5B requirements.
6.How does Aetrix verify that SMBJ28CHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBJ28CHE3/5B 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 SMBJ28CHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBJ28CHE3/5B?
All SMBJ28CHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CHE3/5B, 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 SMBJ28CHE3/5B part is unused and in its original packaging.
Return procedure for SMBJ28CHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CHE3/5B Tags
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