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Vishay General Semiconductor - Diodes Division SMBJ28D-M3/H
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- Part No.:
- SMBJ28D-M3/H
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28D-M3/H.pdf
- Description:
- TVS DIODE 28VWM 44.7VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,435
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Product details
Overview
SMBJ28D-M3/H from Vishay General Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode in SMB (DO-214AA) package, with 28 V stand-off voltage (VWM), 31.6–33.9 V breakdown voltage (VBR at 1.0 mA), 44.7 V clamping voltage (VC) at 13.4 A peak pulse current, and 600 W peak pulse power rating (10/1000 μs waveform). It protects MOSFETs and signal lines in industrial sensor interfaces against inductive switching transients.
For engineers reviewing the SMBJ28D-M3/H datasheet, SMBJ28D-M3/H pinout, SMBJ28D-M3/H application, or SMBJ28D-M3/H equivalent, key selection criteria include unidirectional polarity, ±3.5% VBR tolerance, 0.5 μA max reverse leakage at VWM, MSL Level 1 moisture sensitivity, and halogen-free RoHS-compliant construction.
Technical Context
This TVS diode operates as a clamping device in parallel with sensitive circuit nodes, activating when transient voltage exceeds VBR to shunt surge current away from downstream components. Its low incremental surge resistance and fast response time ensure effective suppression of ESD and lightning-induced surges.
Designed for surface-mount assembly on standard PCBs, SMBJ28D-M3/H uses matte tin-plated leads compliant with J-STD-002 and JESD 22-B102, and meets JESD 201 Class 2 whisker resistance. The cathode band denotes polarity, and it is rated for operation from –55 °C to +150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 31.6 V / 33.9 V at 1.0 mA - tight ±3.5% tolerance ensures predictable turn-on across production lots |
| VC @ IPPM | 44.7 V at 13.4 A - clamping voltage limits stress on protected ICs during 600 W transient events |
| ID @ VWM | ≤0.5 μA - ultra-low leakage preserves signal integrity and battery life in always-on circuits |
| PPPM | 600 W (10/1000 μs) - handles high-energy transients common in motor drives and power supply inputs |
| TJ max | +150 °C - supports reliable operation in under-hood automotive and industrial control environments |
| Package | SMB (DO-214AA) - compact 2.20 mm × 3.94 mm footprint compatible with automated pick-and-place |
Pinout & Package
Two-terminal unidirectional TVS diode in SMB (DO-214AA) package. Cathode indicated by molded band; anode is opposite end. Matte tin-plated leads meet J-STD-002 solderability and JESD 201 Class 2 whisker requirements. Molding compound complies with UL 94 V-0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Transient current sink | Connected to protected line; conducts surge current to ground when VBR exceeded |
| Anode | Reference node | Typically tied to system ground or low-impedance return path for clamping action |
Key Features
| Feature | Design Value |
|---|---|
| ±3.5 % VBR tolerance | Enables precise overvoltage protection thresholds without design margin over-engineering |
| 600 W peak pulse power | Withstands repetitive 10/1000 μs surges up to 0.01 % duty cycle in industrial power rails |
| MSL Level 1 rating | Allows unlimited floor life and reflow at 260 °C peak without baking preconditioning |
| Halogen-free, RoHS-compliant | Meets IPC-1752A material declaration requirements for green electronics manufacturing |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients (<1 ns rise time) |
Applications
| Industrial Motor Control | Automotive Sensor Interface |
|---|---|
Use Scenario: Protection of gate drivers and feedback signal lines in 24 V DC motor controllers subject to inductive kickback from solenoids and relays. IC Role / Device Role / Timing Role: Unidirectional TVS placed across MOSFET gate-source or op-amp input pins to clamp transients below absolute maximum ratings. Use Value: Prevents latch-up and permanent damage to precision analog front-ends while maintaining <0.5 μA leakage at 28 V bus voltage. | Use Scenario: ESD and load-dump protection for LIN/CAN transceiver signal lines and microcontroller I/O in body control modules. IC Role / Device Role / Timing Role: Standoff-rated clamping device mounted directly at connector entry points to divert 8 kV HBM ESD and ISO 7637-2 pulse 1/2a energy. Use Value: 44.7 V clamping voltage ensures protected ICs remain within safe operating area during 13.4 A surge events. |
| Telecom Power Supply Input | Consumer Appliance MCU I/O |
Use Scenario: Secondary-side transient suppression on 28 V auxiliary rails feeding PoE-powered switch controllers and PHYs. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing coupled surges from AC/DC converter primary side and external cable ports. Use Value: 600 W rating sustains repeated 10/1000 μs transients without degradation, supporting >10-year field reliability. | Use Scenario: Overvoltage protection for touch-button inputs and display interface lines in smart home hubs operating from 24–32 V DC adapters. IC Role / Device Role / Timing Role: Low-leakage standoff device preserving ADC reference accuracy while blocking >30 V fault conditions. Use Value: 0.5 μA max reverse leakage at 28 V prevents measurable offset drift in 12-bit SAR ADC measurements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ28A-M3/H | Same VWM/VBR/VC, but bidirectional configuration (no polarity marking) | Required where symmetrical surge protection needed on AC-coupled or differential lines | Select SMBJ28A-M3/H only if bidirectional clamping is explicitly required; SMBJ28D-M3/H provides lower leakage in DC-biased applications |
| SMCJ28A | Larger SMC (DO-214AB) package, same electrical specs, higher thermal mass (RθJA = 40 °C/W vs. 125 °C/W) | Better suited for high-repetition-rate surges in power supply outputs due to improved heat dissipation | Choose SMCJ28A only when board layout allows larger footprint and thermal management justifies size increase |
Compared with SMBJ28A-M3/H and SMCJ28A, SMBJ28D-M3/H offers optimal balance of compact SMB footprint, unidirectional low-leakage performance, and industrial-grade reliability-making it preferred for space-constrained DC signal line protection where polarity is fixed and surge repetition is infrequent.
Availability
SMBJ28D-M3/H is available at Aetrix Electronics and suitable for industrial motor control, automotive sensor interface, and telecom power supply applications requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for SMBJ28D-M3/H 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 high-reliability, automotive-qualified, and industrial-grade solutions.
The SMBJ series was engineered specifically for robust transient suppression in harsh environments-delivering tight VBR tolerance, low clamping ratio, and MSL Level 1 process compatibility for high-volume SMT manufacturing.
FAQ
What is the maximum clamping voltage of SMBJ28D-M3/H at its rated peak pulse current?
The SMBJ28D-M3/H has a maximum clamping voltage (VC) of 44.7 V at its rated peak pulse current (IPPM) of 13.4 A, measured using a 10/1000 μs waveform. This value ensures protected downstream components like microcontrollers or gate drivers remain within their absolute maximum voltage ratings during surge events. The clamping performance is guaranteed across the full operating temperature range of –55 °C to +150 °C.
Is SMBJ28D-M3/H suitable for automotive applications per AEC-Q200?
SMBJ28D-M3/H is not AEC-Q200 qualified. While it meets industrial temperature range (–55 °C to +150 °C) and MSL Level 1 reflow requirements, Vishay does not list this specific variant in its AEC-Q200 qualified portfolio. For automotive use, engineers should select the AEC-Q200 qualified SMBJ28DHE3/52 or equivalent qualified variant-SMBJ28D-M3/H is intended for industrial, telecom, and consumer applications where AEC certification is not mandated.
What does the "-M3/H" suffix indicate in SMBJ28D-M3/H?
The "-M3" suffix denotes halogen-free, RoHS-compliant, industrial-grade construction with matte tin-plated leads meeting JESD 201 Class 2 whisker resistance. The "/H" indicates packaging in 7" diameter plastic tape and reel, with a base quantity of 750 units per reel. This ordering code ensures consistent material compliance and automated assembly compatibility-SMBJ28D-M3/H is not interchangeable with non-M3 variants in regulated environmental compliance programs.
Can SMBJ28D-M3/H be used in bidirectional signal protection?
No-SMBJ28D-M3/H is strictly unidirectional, with cathode marked by a band. Using it for bidirectional protection would result in forward conduction during negative transients, causing failure. For bidirectional applications, specify SMBJ28CD-M3/H (the "CD" suffix denotes bidirectional). The "D" in SMBJ28D-M3/H explicitly confirms unidirectional polarity, and its electrical characteristics are defined only for reverse-biased operation.
What is the thermal resistance junction-to-ambient for SMBJ28D-M3/H?
The typical thermal resistance junction-to-ambient (RθJA) for SMBJ28D-M3/H is 125 °C/W when mounted on the minimum recommended pad layout per Vishay's datasheet (Document Number: 87606). This value assumes standard FR-4 PCB with specified copper pad dimensions. For improved thermal performance, mounting on a 5.0 mm × 5.0 mm copper pad reduces RθJA to 100 °C/W-critical for sustained power dissipation in SMBJ28D-M3/H designs.
SMBJ28D-M3/H 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:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.6V
- Voltage - Clamping (Max) @ Ipp:
- 44.7V
- Current - Peak Pulse (10/1000µs):
- 13.4A
- 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)
SMBJ28D-M3/H FAQ
1.How can I place an order for SMBJ28D-M3/H through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28D-M3/H 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 SMBJ28D-M3/H reliable?
The price and inventory of SMBJ28D-M3/H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28D-M3/H is usually 5 days.
3.What payment methods are accepted for SMBJ28D-M3/H?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28D-M3/H transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28D-M3/H?
SMBJ28D-M3/H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28D-M3/H 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 SMBJ28D-M3/H?
For technical support, including SMBJ28D-M3/H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28D-M3/H requirements.
6.How does Aetrix verify that SMBJ28D-M3/H is sourced from the original manufacturer or authorized distributors?
All SMBJ28D-M3/H 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 SMBJ28D-M3/H meets industry standards.
7.What is the process for return or replacement of SMBJ28D-M3/H?
All SMBJ28D-M3/H units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28D-M3/H, 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 SMBJ28D-M3/H part is unused and in its original packaging.
Return procedure for SMBJ28D-M3/H:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28D-M3/H Tags
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