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Vishay General Semiconductor - Diodes Division SMBG28CAHE3/5B
- Part No.:
- SMBG28CAHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28CAHE3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:9,271
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Product details
Overview
SMBG28CAHE3/5B from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of signal and power lines. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 600 W peak pulse power (10/1000 µs), clamping voltage of 45.4 V at 13.2 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMBG28CAHE3/5B datasheet, SMBG28CAHE3/5B pinout, SMBG28CAHE3/5B application, or SMBG28CAHE3/5B equivalent, this device is selected for high-reliability transient suppression in automotive sensor interfaces, industrial I/O ports, and DC power rail protection where bidirectional surge immunity and low clamping ratio are critical.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, with identical electrical characteristics in forward and reverse directions-enabling single-device protection of AC-coupled or floating signal paths. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1 ns), while the low incremental surge resistance supports effective energy diversion during ESD and lightning-induced transients.
The SMBG28CAHE3/5B is rated for 150 °C maximum junction temperature and meets J-STD-020 MSL Level 1 (peak reflow 260 °C), supporting lead-free assembly. Its thermal resistance (RθJA = 100 °C/W) assumes mounting on 0.2" × 0.2" copper pads, enabling predictable derating above 25 °C ambient per Fig. 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating range for protected circuit. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range; ensures consistent turn-on behavior across production lots. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage under 600 W 10/1000 µs surge; determines worst-case overvoltage seen by downstream ICs. |
| PPPM | 600 W - Peak pulse power handling capability; validates suitability for IEC 61000-4-5 Level 3 (1 kV/2 Ω) surge testing. |
| ID @ VWM | <1.0 µA - Reverse leakage current at stand-off voltage; ensures minimal power loss and signal integrity in high-impedance nodes. |
| TJ max. | +150 °C - Maximum junction temperature rating; supports operation in under-hood automotive environments and industrial enclosures. |
| AEC-Q101 | Qualified - Validated for automotive electronic systems per stress test requirements including HTOL, TCT, and ESD HBM/MM. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 4.57 mm × 3.94 mm × 2.10 mm (L × W × H); matte tin-plated leads, RoHS compliant, halogen-free option available (HE3 suffix).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (negative polarity) | One terminal of symmetrical junction; conducts during negative surges to clamp voltage below −VC. |
| Cathode | Transient current entry (positive polarity) | Other terminal of symmetrical junction; conducts during positive surges to clamp voltage above +VC. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping symmetry | Identical VBR, VC, and IPPM in both directions enables single-device protection of AC or floating differential lines without polarity concerns. |
| 600 W peak pulse power (10/1000 µs) | Validates compliance with IEC 61000-4-5 surge immunity standards up to Level 3, supporting industrial and automotive system-level testing. |
| AEC-Q101 qualification | Confirms reliability for automotive applications including engine control units, ADAS sensors, and body electronics exposed to harsh thermal and vibration environments. |
| Low clamping ratio (VC/VBR ≈ 1.42) | Minimizes overvoltage stress on protected ICs-critical for safeguarding 3.3 V or 5 V logic interfaces adjacent to high-energy transients. |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and standard SMT reflow without baking, reducing manufacturing overhead and preventing popcorning defects. |
Applications
| Automotive Sensor Interface Protection | Industrial CAN Bus Transceiver Protection |
|---|---|
Use Scenario: Protecting LIN/CAN physical layer transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump, jump-start, and ISO 7637-2 pulses in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional TVS placed between transceiver I/O pins and chassis ground to shunt surge energy before it reaches the IC's ESD structures. Use Value: Clamps transients to ≤45.4 V, keeping voltage within absolute maximum ratings of 5 V CAN/LIN transceivers and preventing latch-up or permanent damage. | Use Scenario: Safeguarding RS-485/CAN FD communication lines in factory automation PLCs and motor drives exposed to inductive switching noise and ground bounce. IC Role / Device Role / Timing Role: Placed differentially across A/B bus lines to suppress common-mode surges while maintaining signal integrity up to 5 Mbps. Use Value: Symmetrical clamping ensures equal protection on both bus lines, eliminating need for dual unidirectional devices and preserving differential timing margins. |
| DC Power Rail Surge Suppression | USB Type-C VBUS Line Protection |
Use Scenario: Protecting 24 V or 36 V DC input rails in industrial cameras, PoE-powered devices, and telecom power supplies from lightning-induced surges and hot-swap transients. IC Role / Device Role / Timing Role: Connected between rail and ground to clamp overvoltage events exceeding 28 V, upstream of DC-DC converters and LDOs. Use Value: 600 W rating handles repetitive 10/1000 µs surges without degradation; low leakage avoids unnecessary quiescent current draw. | Use Scenario: Secondary overvoltage protection on USB Type-C VBUS lines after primary protection, guarding against miswiring or adapter faults that exceed 20 V. IC Role / Device Role / Timing Role: Positioned between VBUS and ground to limit fault voltage to ≤45.4 V during 10/1000 µs surges, protecting USB PD controllers and port power switches. Use Value: AEC-Q101 qualification and low capacitance support reliable operation in automotive infotainment USB hubs with stringent EMC and lifetime requirements. |
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-E3/5B | Same VWM (28 V), lower PPPM (600 W → 400 W), higher VC (48.4 V vs. 45.4 V), same SMB package. | Limited to lower-energy surge environments (e.g., consumer electronics); insufficient for IEC 61000-4-5 Level 3. | Select SMBG28CAHE3/5B when 600 W clamping performance and AEC-Q101 qualification are mandatory. |
| 1.5KE28CA | Higher PPPM (1500 W), axial DO-201 package, larger footprint, slower response due to higher junction capacitance. | Not suitable for high-density SMT layouts; incompatible with automated placement and reflow profiles for fine-pitch boards. | Choose SMBG28CAHE3/5B for space-constrained PCBs requiring AEC-Q101 and full SMT compatibility. |
Compared with SMBJ28CA-E3/5B and 1.5KE28CA, the SMBG28CAHE3/5B delivers superior clamping performance in a compact, automotive-qualified SMT package-enabling smaller board area, higher reliability in thermal cycling, and guaranteed compliance with automotive EMC test plans.
Availability
SMBG28CAHE3/5B is available at Aetrix Electronics and suitable for automotive ECU design, industrial fieldbus protection, and DC power supply hardening requiring stable component supply and long-term lifecycle assurance.
Supply support for SMBG28CAHE3/5B 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, efficiency, and application-specific optimization.
The SMBG series was engineered for high-power, surface-mount transient suppression in automotive and industrial systems-prioritizing AEC-Q101 qualification, low clamping ratio, and robust thermal performance in compact packages.
FAQ
What is the clamping voltage of SMBG28CAHE3/5B at its rated peak pulse current?
The SMBG28CAHE3/5B has a maximum clamping voltage (VC) of 45.4 V at its peak pulse current (IPPM) of 13.2 A, measured under the standardized 10/1000 µs waveform. This value is confirmed in the Vishay datasheet Document Number 88456, Table on page 2, and defines the upper voltage limit imposed on protected circuits during surge events. The SMBG28CAHE3/5B maintains this clamping performance bidirectionally.
Is SMBG28CAHE3/5B suitable for automotive applications?
Yes, SMBG28CAHE3/5B is AEC-Q101 qualified, as explicitly stated in the Vishay datasheet (Document Number 88456, page 1 and page 3). Its construction-including glass-passivated junction, MSL Level 1 rating, and operation up to +150 °C junction temperature-meets automotive environmental and reliability requirements. The HE3 suffix denotes AEC-Q101 qualification, making SMBG28CAHE3/5B appropriate for engine control, ADAS, and body electronics.
What does the "CA" suffix indicate in SMBG28CAHE3/5B?
The "CA" suffix in SMBG28CAHE3/5B designates a bidirectional transient voltage suppressor, meaning it provides symmetrical clamping for both positive and negative voltage transients. As confirmed in the Vishay datasheet introduction ("For bidirectional devices use CA suffix"), this allows single-device protection of AC-coupled, differential, or floating signal lines-unlike "A"-suffix unidirectional parts that require cathode orientation.
What is the maximum reverse leakage current for SMBG28CAHE3/5B at its stand-off voltage?
The SMBG28CAHE3/5B exhibits a maximum reverse leakage current (ID) of 1.0 µA at its 28 V stand-off voltage (VWM), per the Electrical Characteristics table on page 2 of the Vishay datasheet (Document Number 88456). This low leakage ensures minimal power loss and signal distortion in high-impedance protection configurations, such as sensor bias networks or high-speed data lines.
How does the SMBG28CAHE3/5B package differ from SMBJ or SMA packages?
The SMBG28CAHE3/5B uses the SMBG (DO-215AA) package, which is dimensionally distinct from SMBJ (DO-214AA) and SMA (DO-214AC): SMBG measures 4.57 mm × 3.94 mm × 2.10 mm, offers higher power density than SMA, and is optimized for 600 W dissipation-unlike SMBJ's 400 W rating. The SMBG28CAHE3/5B's gull-wing leads and pad layout (per datasheet page 5) ensure compatibility with standard SMT processes but are not mechanically interchangeable with SMBJ or SMA footprints.
SMBG28CAHE3/5B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AA, SMB Gull Wing
- 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:
- 45.4V
- 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 (SMBG)
SMBG28CAHE3/5B FAQ
1.How can I place an order for SMBG28CAHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28CAHE3/5B 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 SMBG28CAHE3/5B reliable?
The price and inventory of SMBG28CAHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG28CAHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG28CAHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28CAHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28CAHE3/5B?
SMBG28CAHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28CAHE3/5B 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 SMBG28CAHE3/5B?
For technical support, including SMBG28CAHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28CAHE3/5B requirements.
6.How does Aetrix verify that SMBG28CAHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG28CAHE3/5B 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 SMBG28CAHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG28CAHE3/5B?
All SMBG28CAHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28CAHE3/5B, 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 SMBG28CAHE3/5B part is unused and in its original packaging.
Return procedure for SMBG28CAHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28CAHE3/5B Tags
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