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Vishay General Semiconductor - Diodes Division SMBJ28CAHE3_A/I
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- Part No.:
- SMBJ28CAHE3_A/I
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMBJ28CAHE3_A/I.pdf
- Description:
- TVS DIODE 28VWM 45.5VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:5,832
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Product details
Overview
SMBJ28CAHE3_A/I 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 or 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 and telecom equipment.
For engineers reviewing the SMBJ28CAHE3_A/I datasheet, SMBJ28CAHE3_A/I pinout, SMBJ28CAHE3_A/I application, or SMBJ28CAHE3_A/I equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification status, thermal resistance (RθJA = 100 °C/W), junction temperature range (–55 to +150 °C), and compatibility with automated SMT placement on standard PCB pad layouts.
Technical Context
This device operates as a voltage-clamping protector with symmetrical reverse/forward conduction behavior due to its bidirectional construction. It responds to transient overvoltages within picoseconds and maintains low incremental surge resistance to limit let-through energy during 10/1000 µs surges up to 13.2 A.
Designed for unattended protection of sensitive nodes, it delivers stable clamping performance across –55 °C to +150 °C operating junction temperature, with thermal resistance optimized for 0.2" × 0.2" copper pads per terminal and meets J-STD-020 MSL Level 1 reflow requirements (peak 260 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before significant leakage; defines safe working margin below clamping threshold |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown onset range; ensures reliable triggering above VWM with margin |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage under full 600 W surge; determines maximum stress imposed on downstream circuitry |
| PPPM | 600 W - Peak pulse power handling with 10/1000 µs waveform; validates robustness against lightning-induced or inductive-switching transients |
| IPPM | 13.2 A - Peak surge current capability; sets minimum trace width and layout clearance requirements for PCB routing |
| TJ max. | +150 °C - Maximum junction temperature; enables operation in high-ambient environments like motor drives or outdoor telecom enclosures |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance on standard 0.2" × 0.2" copper pads; informs derating curves above 25 °C ambient |
Pinout & Package
Package: SMB (DO-214AA), surface-mount, bidirectional configuration with no polarity marking; matte tin-plated leads, RoHS-compliant and AEC-Q101 qualified (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Provides symmetrical conduction path for both positive and negative transients; connects to protected line or ground reference |
| Cathode | Transient return path (bidirectional) | Electrically identical to anode in bidirectional TVS; no functional distinction - device has no polarity marking |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates protection against IEC 61000-4-5 Level 4 surges (4 kV line-earth) without degradation when properly mounted |
| AEC-Q101 qualified (HE3 suffix) | Confirms reliability for automotive powertrain and body electronics applications requiring extended temperature cycling and humidity testing |
| MSL Level 1 (260 °C peak) | Enables single-pass lead-free reflow without moisture-related delamination or popcorn failure |
| Low incremental surge resistance | Minimizes VC overshoot during fast-rising transients, reducing risk of latch-up or gate oxide damage in protected FETs/ICs |
| Glass passivated chip junction | Ensures long-term stability of VBR and leakage under thermal cycling and humid environments |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of gate drivers and current-sense amplifiers against inductive kickback from relay coils and solenoid switching. IC Role / Device Role: Bidirectional clamping element placed across power rails or signal inputs to limit transient excursions. Use Value: Prevents false triggering or permanent damage to 3.3 V/5 V logic interfaces while maintaining signal integrity during repetitive switching events. | Use Scenario: Surge suppression on LIN bus lines and sensor supply rails exposed to load dump and jump-start conditions. IC Role / Device Role: Standoff voltage-aligned TVS providing fail-safe clamping without DC loading on low-power communication lines. Use Value: Enables compliance with ISO 7637-2 Pulse 1/2a/3a and AEC-Q100 stress tests without adding series impedance or filtering delay. |
| Telecom Power Supply Inputs | Consumer Appliance Control Boards |
Use Scenario: Input-stage protection of AC/DC adapters and PoE injectors against lightning-induced surges entering via Ethernet or mains lines. IC Role / Device Role: Primary-level TVS placed after fuse and before primary-side controller to absorb bulk surge energy. Use Value: Limits let-through voltage to <45.4 V, preventing overvoltage shutdown or avalanche failure in PWM controllers and optocouplers. | Use Scenario: ESD and EFT protection for touch panel interfaces and microcontroller I/O pins in washing machines and HVAC systems. IC Role / Device Role: Low-capacitance (<100 pF typical at 0 V) bidirectional clamp on data lines with minimal signal distortion. Use Value: Passes IEC 61000-4-2 ±8 kV contact discharge without latch-up, preserving real-time responsiveness of capacitive touch firmware. |
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 | Halogen-free, RoHS-compliant, commercial-grade; lacks AEC-Q101 qualification | Not suitable for automotive under-hood or safety-critical modules requiring automotive qualification | Select when cost-sensitive industrial designs require halogen-free compliance but no automotive qualification |
| SMCJ28CAHE3_A/I | Same electrical specs but larger SMC (DO-214AB) package; higher IPPM (23.1 A) and PPPM (1500 W) | Requires larger PCB footprint and higher thermal mass; better suited for high-energy surge zones like AC input stages | Select when system-level surge testing exceeds 600 W or board layout allows SMC footprint |
Compared with SMBJ28CAHE3_A/I, SMBJ28CA-M3 offers identical clamping performance without automotive qualification, while SMCJ28CAHE3_A/I provides higher surge capacity in a larger package - choice depends on qualification requirements and available board space.
Availability
SMBJ28CAHE3_A/I is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, and telecom power supply inputs requiring stable component supply with AEC-Q101 assurance and lead-free reflow compatibility.
Supply support for SMBJ28CAHE3_A/I 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 automotive-grade validation.
The SMBJ series targets high-volume, space-constrained applications needing robust transient suppression in compact SMB packages - engineered for automated assembly and harsh-environment operation across consumer, industrial, and automotive markets.
FAQ
What is the clamping voltage of SMBJ28CAHE3_A/I at its rated peak pulse current?
The SMBJ28CAHE3_A/I has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 13.2 A with a 10/1000 µs waveform. This value is measured under standardized test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case surge events. The SMBJ28CAHE3_A/I maintains this clamping performance across its full operating temperature range.
Is SMBJ28CAHE3_A/I suitable for automotive applications?
Yes, SMBJ28CAHE3_A/I is AEC-Q101 qualified, confirming its suitability for automotive applications including body electronics, infotainment, and power distribution modules. The HE3 suffix explicitly denotes AEC-Q101 qualification, and the device meets MSL Level 1 reflow requirements for lead-free assembly. Its –55 °C to +150 °C operating range supports under-hood and cabin-mounted use cases where SMBJ28CAHE3_A/I is deployed.
How does the bidirectional configuration of SMBJ28CAHE3_A/I affect its circuit implementation?
The bidirectional configuration of SMBJ28CAHE3_A/I allows symmetric clamping of both positive and negative transients without polarity sensitivity - eliminating need for orientation verification during placement. It functions identically across both terminals, with no cathode band marking. This simplifies layout on differential lines, AC-coupled signals, or floating references where polarity reversal may occur, and ensures consistent protection behavior regardless of transient direction in SMBJ28CAHE3_A/I applications.
What is the thermal resistance of SMBJ28CAHE3_A/I, and how does it impact PCB layout?
SMBJ28CAHE3_A/I 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. This value assumes minimum recommended pad layout per Vishay's datasheet. To maintain reliability under repetitive surge conditions, designers must allocate adequate copper area and avoid excessive trace length between SMBJ28CAHE3_A/I and ground/power planes to prevent localized heating beyond +150 °C junction limit.
Does SMBJ28CAHE3_A/I meet RoHS and halogen-free requirements?
SMBJ28CAHE3_A/I is RoHS-compliant per EU Directive 2011/65/EU, as indicated by the "HE3" suffix. However, it is not halogen-free - that designation applies only to "HM3" suffix variants. The device uses matte tin-plated leads and complies with JESD 22-B102 solderability standards and JESD 201 Class 2 whisker resistance. For halogen-free compliance, SMBJ28CAHM3_A/I would be the appropriate alternative to SMBJ28CAHE3_A/I.
SMBJ28CAHE3_A/I 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:
- 45.5V
- Current - Peak Pulse (10/1000µs):
- 13.2A
- 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)
SMBJ28CAHE3_A/I FAQ
1.How can I place an order for SMBJ28CAHE3_A/I through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBJ28CAHE3_A/I 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 SMBJ28CAHE3_A/I reliable?
The price and inventory of SMBJ28CAHE3_A/I are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBJ28CAHE3_A/I is usually 5 days.
3.What payment methods are accepted for SMBJ28CAHE3_A/I?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBJ28CAHE3_A/I transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBJ28CAHE3_A/I?
SMBJ28CAHE3_A/I orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBJ28CAHE3_A/I 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 SMBJ28CAHE3_A/I?
For technical support, including SMBJ28CAHE3_A/I datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBJ28CAHE3_A/I requirements.
6.How does Aetrix verify that SMBJ28CAHE3_A/I is sourced from the original manufacturer or authorized distributors?
All SMBJ28CAHE3_A/I 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 SMBJ28CAHE3_A/I meets industry standards.
7.What is the process for return or replacement of SMBJ28CAHE3_A/I?
All SMBJ28CAHE3_A/I units undergo pre-shipment inspection (PSI). If there is an issue with SMBJ28CAHE3_A/I, 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 SMBJ28CAHE3_A/I part is unused and in its original packaging.
Return procedure for SMBJ28CAHE3_A/I:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBJ28CAHE3_A/I Tags
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DESD3V3E1BL-7B
Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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Diodes Incorporated
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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Diodes Incorporated
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