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Vishay General Semiconductor - Diodes Division SMBG28AHE3/5B
- Part No.:
- SMBG28AHE3/5B
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28AHE3/5B.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,662
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Product details
Overview
SMBG28AHE3/5B from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMBG (DO-215AA) package, designed for robust overvoltage protection of DC power rails and signal 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 - deployed in automotive ECUs, industrial sensor interfaces, and power supply input stages.
For engineers reviewing the SMBG28AHE3/5B datasheet, SMBG28AHE3/5B pinout, SMBG28AHE3/5B application, or SMBG28AHE3/5B equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, low incremental surge resistance, and compatibility with automated SMT placement on 5.0 mm × 5.0 mm copper pads.
Technical Context
This TVS diode operates as a voltage-clamped shunt protector: under normal conditions it presents high impedance (>1 µA leakage at 28 V), then rapidly avalanches below 34.4 V to divert transient energy away from downstream ICs. Its glass-passivated junction ensures stable breakdown characteristics and long-term reliability under repetitive surge stress.
The device is rated for 100 A non-repetitive forward surge current (8.3 ms half-sine), supports 0.01 % duty cycle repetitive operation, and meets J-STD-020 MSL Level 1 with 260 °C reflow peak - confirming suitability for high-volume automotive and industrial assembly processes.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across temperature and lot variation. |
| VC @ IPPM | 45.4 V at 13.2 A - Clamped voltage during 10/1000 µs transient; determines protected circuit's maximum stress level. |
| PPPM | 600 W - Peak pulse power handling per JEDEC standard; validates protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges. |
| IFSM | 100 A - Single half-sine surge rating (8.3 ms); supports protection of 12 V/24 V vehicle battery lines against load dump. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and sealed industrial enclosures. |
| Qualification | AEC-Q101 qualified - Certified for automotive-grade reliability including HTOL, TCT, and ESD testing per stress test plan. |
Pinout & Package
Package: SMBG (DO-215AA), surface-mount, gull-wing leads, matte tin-plated terminals solderable per J-STD-002 and JESD 22-B102. Cathode indicated by band marking; 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 exceeds VBR. |
| Anode (unmarked end) | Reference/ground return path | Typically tied to system ground or low-impedance return plane; completes clamping current loop. |
Key Features
| Feature | Design Value |
|---|---|
| 600 W peak pulse power (10/1000 µs) | Validates robustness against severe transients like ISO 16750-2 load dump and IEC 61000-4-5 combination wave. |
| AEC-Q101 qualification | Confirms compliance with automotive reliability requirements including 1000-cycle temperature cycling and 1000-hour HTOL. |
| Glass passivated junction | Ensures stable VBR tolerance and low parameter drift over time and thermal cycling. |
| MSL Level 1 (260 °C peak) | Enables single-pass reflow without moisture-related popcorn failure; eliminates bake requirement pre-assembly. |
| Low profile SMBG package | 0.97 mm max height enables use in space-constrained modules such as ADAS camera housings and motor control PCBs. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus power inputs in body control modules against load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional shunt TVS placed between VBAT and chassis ground, clamping surges within 1 ns response time. Use Value: Limits peak voltage to ≤45.4 V, preventing damage to upstream PMICs and downstream CAN transceivers rated for 36 V absolute max. | Use Scenario: Safeguarding analog output lines (4–20 mA) of pressure/temperature sensors in factory automation PLC I/O modules. IC Role / Device Role / Timing Role: Low-capacitance (<100 pF) TVS mounted directly at connector entry point to suppress ESD and inductive switching noise. Use Value: Maintains signal integrity with <1 µA leakage at 28 V, while clamping 1 kV ESD events to <45.4 V before reaching precision DAC/ADC front-end. |
| DC-DC Converter Input Protection | Telecom Power Supply Surge Suppression |
Use Scenario: Input-stage protection for 28 V input buck converters in railway signaling equipment exposed to traction power surges. IC Role / Device Role / Timing Role: Primary overvoltage clamp ahead of input filter capacitor and controller IC; absorbs energy before it reaches MOSFET gate drivers. Use Value: Withstands 100 A surge (8.3 ms) without degradation, enabling compliance with EN 50121-3-2 rail EMC immunity requirements. | Use Scenario: Secondary-side DC output protection in -48 V telecom rectifiers subjected to lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS placed between +VOUT and RETURN to clamp positive-going transients on powered-backup circuits. Use Value: 600 W rating sustains repeated 10/1000 µs surges up to 13.2 A, meeting GR-1089-CORE Level 3 telecom surge immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBG28AHM3/5B | Halogen-free, RoHS-compliant variant; identical electrical specs and AEC-Q101 qualification. | No functional difference; selected where halogen-free material compliance is mandated (e.g., EU medical devices). | Choose SMBG28AHM3/5B when halogen-free bill-of-materials is required; otherwise SMBG28AHE3/5B is standard. |
| SMAJ28A-E3/5B | Same VWM/VC, but lower PPPM (400 W), higher RθJA (150 °C/W), and no AEC-Q101 qualification. | Limited to commercial/industrial use; unsuitable for automotive under-hood deployment due to lower surge margin and qualification gap. | Select SMAJ28A-E3/5B only for cost-sensitive non-automotive designs where 400 W surge capability suffices. |
Compared with SMBG28AHM3/5B, SMBG28AHE3/5B offers identical protection performance with standard RoHS compliance; versus SMAJ28A-E3/5B, it delivers 50 % higher surge power, superior thermal resistance (100 vs. 150 °C/W), and certified automotive reliability - critical for mission-critical 24 V systems.
Availability
SMBG28AHE3/5B is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor systems, and telecom power supplies requiring stable component supply with AEC-Q101 assurance and 13" tape-and-reel packaging (3200 units/reel).
Supply support for SMBG28AHE3/5B 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, TVS, MOSFETs, and optoelectronics with emphasis on reliability, efficiency, and application-specific optimization.
The SMBG series was engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications demanding AEC-Q101 qualification, low-profile SMT compatibility, and repeatable clamping performance.
FAQ
What is the maximum clamping voltage of SMBG28AHE3/5B at its rated peak pulse current?
The SMBG28AHE3/5B 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 per JEDEC and defines the upper voltage limit imposed on protected circuitry during surge events. The SMBG28AHE3/5B maintains this clamping performance across its full operating temperature range.
Is SMBG28AHE3/5B qualified for automotive applications?
Yes, SMBG28AHE3/5B is AEC-Q101 qualified, meaning it has passed rigorous stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and electrostatic discharge (HBM/MM/CDM). This qualification confirms its suitability for automotive powertrain, body electronics, and ADAS systems where reliability under thermal and electrical stress is mandatory. The SMBG28AHE3/5B is explicitly listed in Vishay's AEC-Q101 qualified product matrix.
What does the "HE3" suffix indicate in SMBG28AHE3/5B?
The "HE3" suffix in SMBG28AHE3/5B denotes RoHS-compliant, AEC-Q101-qualified construction with matte tin-plated leads. "H" indicates AEC-Q101 qualification, "E3" specifies RoHS-compliant industrial grade (per Vishay's ordering nomenclature). This distinguishes it from "HM3" (halogen-free + AEC-Q101) and base "E3" (RoHS only, no AEC-Q101). The SMBG28AHE3/5B thus combines automotive reliability with environmental compliance.
Can SMBG28AHE3/5B be used in bidirectional configurations?
No, SMBG28AHE3/5B is a unidirectional TVS diode, as confirmed by its part number suffix "A" (not "CA") and datasheet designation. Bidirectional variants carry the "CA" suffix (e.g., SMBG28CA). Using SMBG28AHE3/5B in bidirectional applications would result in forward conduction during negative transients, potentially damaging the device or failing to protect. For AC or dual-polarity lines, select SMBG28CAHE3/5B instead.
What is the thermal resistance from junction to ambient for SMBG28AHE3/5B?
The typical thermal resistance from junction to ambient (RθJA) for SMBG28AHE3/5B 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 datasheet. This value assumes standard PCB layout per recommended pad dimensions and is critical for calculating junction temperature rise under sustained surge duty cycles. The SMBG28AHE3/5B's RθJA enables reliable operation up to +150 °C junction temperature.
SMBG28AHE3/5B 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMBG28AHE3/5B FAQ
1.How can I place an order for SMBG28AHE3/5B through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28AHE3/5B 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 SMBG28AHE3/5B reliable?
The price and inventory of SMBG28AHE3/5B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG28AHE3/5B is usually 5 days.
3.What payment methods are accepted for SMBG28AHE3/5B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28AHE3/5B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28AHE3/5B?
SMBG28AHE3/5B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28AHE3/5B 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 SMBG28AHE3/5B?
For technical support, including SMBG28AHE3/5B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28AHE3/5B requirements.
6.How does Aetrix verify that SMBG28AHE3/5B is sourced from the original manufacturer or authorized distributors?
All SMBG28AHE3/5B 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 SMBG28AHE3/5B meets industry standards.
7.What is the process for return or replacement of SMBG28AHE3/5B?
All SMBG28AHE3/5B units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28AHE3/5B, 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 SMBG28AHE3/5B part is unused and in its original packaging.
Return procedure for SMBG28AHE3/5B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMBG28AHE3/5B Tags
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