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Vishay General Semiconductor - Diodes Division SMBG28CAHE3/52
- Part No.:
- SMBG28CAHE3/52
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AA, SMB Gull Wing
- Datasheet:
-
SMBG28CAHE3/52.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AA
- Quantity:
- Payment:
- Shipping:
Inventory:2,643
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Product details
Overview
SMBG28CAHE3/52 from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMBG (DO-215AA) package, rated for 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR), and 600 W peak pulse power (10/1000 μs). It provides robust ESD and surge protection for automotive sensor signal lines, industrial I/O ports, and DC power rails.
For engineers reviewing the SMBG28CAHE3/52 datasheet, SMBG28CAHE3/52 pinout, SMBG28CAHE3/52 application, or SMBG28CAHE3/52 equivalent, key selection criteria include bidirectional clamping capability, AEC-Q101 qualification, low clamping voltage (45.4 V at IPPM), junction temperature range (–55 °C to +150 °C), and RoHS-compliant HE3 suffix with MSL Level 1 rating.
Technical Context
This device operates as a voltage-clamped shunt protector: under normal bias it presents high impedance (<1.0 μA leakage at 28 V), but triggers into low-impedance conduction when transients exceed its breakdown threshold. Its bidirectional symmetry enables use on AC-coupled or floating signal paths without polarity concerns.
The SMBG28CAHE3/52 employs a glass-passivated silicon junction and is optimized for repetitive surge handling (0.01% duty cycle), with thermal resistance of 100 °C/W (junction-to-ambient) and 20 °C/W (junction-to-lead) - critical for sustained operation in automotive under-hood environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - guaranteed breakdown window defining turn-on consistency |
| VC @ IPPM | 45.4 V at 13.2 A - clamping voltage during 600 W surge, limiting downstream stress |
| PPPM | 600 W - peak pulse power handling per 10/1000 μs waveform, enabling IEC 61000-4-5 Level 4 compliance |
| TJ Range | –55 °C to +150 °C - full operational range validated for automotive under-hood deployment |
| Qualification | AEC-Q101 qualified - certified for automotive electronic systems per stress test requirements |
| Package | SMBG (DO-215AA) - surface-mount outline with 0.235" × 0.255" footprint and gull-wing leads |
Pinout & Package
Two-terminal bidirectional device in SMBG (DO-215AA) package: no polarity marking; both terminals are symmetrical and interchangeable. Package features matte tin-plated gull-wing leads, UL 94 V-0 molding compound, and meets J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; symmetric conduction in both directions |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables protection of AC, differential, or floating nodes without external polarity management |
| AEC-Q101 qualification | Validated reliability for automotive applications including engine control, ADAS sensors, and body electronics |
| 600 W surge rating (10/1000 μs) | Meets IEC 61000-4-5 surge immunity requirements for industrial and automotive end equipment |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage exposure to protected ICs while maintaining fast response time |
| MSL Level 1, 260 °C reflow compatible | Supports standard SMT assembly without moisture sensitivity concerns or baking requirements |
Applications
| Automotive Sensor Protection | Industrial I/O Port Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor outputs (e.g., pressure, temperature) from load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Shunt TVS placed across signal/power pins to clamp transients before they reach sensitive analog front-ends or communication ICs. Use Value: Limits induced voltage to ≤45.4 V during 13.2 A surges, preserving signal integrity and preventing latch-up in AEC-Q100 qualified microcontrollers. | Use Scenario: Safeguarding PLC digital input modules and fieldbus interfaces (RS-485, Profibus) against lightning-induced surges and inductive switching noise. IC Role / Device Role / Timing Role: Bidirectional voltage clamp installed between signal line and ground to absorb ±kV-level transients without polarity constraints. Use Value: Maintains functional safety by suppressing >600 W energy spikes within 1 ns response time, reducing system downtime in factory automation. |
| DC Power Rail Protection | Consumer Device USB/Display Interface |
Use Scenario: Guarding 24 V DC power distribution networks in commercial HVAC controllers and lighting drivers against inductive kickback. IC Role / Device Role / Timing Role: Parallel-connected TVS across rail-to-ground to divert surge current away from downstream regulators and MOSFETs. Use Value: Withstands 100 A non-repetitive forward surge (IFSM), ensuring survivability during repeated motor contactor switching events. | Use Scenario: ESD and surge hardening of HDMI, USB 2.0, or MIPI D-PHY lanes in automotive infotainment head units and smart displays. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector entry points to shunt HBM ±8 kV and CDM ±1 kV discharges. Use Value: Junction capacitance <100 pF (typ.) at 0 V bias preserves signal rise/fall times while meeting IEC 61000-4-2 Level 4 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 |
|---|---|---|---|
| SMBJ28CA-E3/52 | Same VWM (28 V), lower PPPM (600 W → 400 W), same SMB (DO-214AA) package footprint but different leadform | Lower surge margin; suitable only where IEC 61000-4-5 Level 3 (not Level 4) compliance is sufficient | Select SMBJ28CA-E3/52 only if board space allows DO-214AA and system surge requirement is ≤400 W |
| SMCJ28CAHE3/52 | Same VWM and PPPM (600 W), but larger SMC (DO-214AB) package with higher thermal mass and RθJA = 40 °C/W | Better thermal performance for high-duty-cycle surges; requires larger PCB pad area (0.375" × 0.260") | Choose SMCJ28CAHE3/52 when ambient temperature exceeds 105 °C or surge repetition rate exceeds 0.01% |
Compared with SMBG28CAHE3/52, SMBJ28CA-E3/52 offers reduced surge capability in a smaller footprint, while SMCJ28CAHE3/52 delivers superior thermal dissipation at the cost of board area - making SMBG28CAHE3/52 the optimal balance of AEC-Q101 compliance, 600 W rating, and compact SMBG packaging for space-constrained automotive modules.
Availability
SMBG28CAHE3/52 is available at Aetrix Electronics and suitable for automotive sensor protection, industrial I/O port hardening, and DC power rail surge suppression requiring stable component supply, AEC-Q101 traceability, and RoHS-compliant manufacturing.
Supply support for SMBG28CAHE3/52 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, automotive qualification, and high-volume manufacturability.
The SMBG series was engineered specifically for AEC-Q101-compliant transient suppression in harsh-environment automotive and industrial applications - prioritizing low clamping voltage, bidirectional symmetry, and robust thermal performance in compact surface-mount packages.
FAQ
What is the clamping voltage of SMBG28CAHE3/52 at its rated peak pulse current?
The SMBG28CAHE3/52 has a maximum clamping voltage (VC) of 45.4 V when subjected to its peak pulse current (IPPM) of 13.2 A under the standardized 10/1000 μs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable overvoltage limiting for downstream circuitry. The SMBG28CAHE3/52 maintains this clamping performance across its full operating temperature range.
Is SMBG28CAHE3/52 suitable for automotive applications?
Yes, SMBG28CAHE3/52 is AEC-Q101 qualified and explicitly designed for automotive use cases including engine control units, ADAS sensor interfaces, and body electronics. Its –55 °C to +150 °C junction temperature range, MSL Level 1 reflow compatibility, and bidirectional surge handling meet stringent automotive reliability requirements. The HE3 suffix confirms AEC-Q101 qualification for the SMBG28CAHE3/52.
What does the "CA" suffix indicate in SMBG28CAHE3/52?
The "CA" suffix in SMBG28CAHE3/52 denotes a bidirectional configuration - meaning the device provides symmetrical transient suppression for both positive and negative voltage excursions. Unlike unidirectional variants (e.g., SMBG28A), the SMBG28CAHE3/52 has no polarity marking and functions identically regardless of voltage polarity applied across its terminals.
How does the SMBG28CAHE3/52 differ from unidirectional SMBG28AHE3/52?
The SMBG28CAHE3/52 is bidirectional with symmetrical VBR and clamping in both directions, while SMBG28AHE3/52 is unidirectional with a defined cathode band and conducts only during reverse-bias transients. SMBG28CAHE3/52 supports AC-coupled or floating signal paths; SMBG28AHE3/52 requires correct polarity orientation and handles forward surge up to 100 A (IFSM), which SMBG28CAHE3/52 does not specify.
What is the thermal resistance of SMBG28CAHE3/52, and why does it matter?
The SMBG28CAHE3/52 has a typical junction-to-ambient thermal resistance (RθJA) of 100 °C/W and junction-to-lead (RθJL) of 20 °C/W. These values determine how effectively heat from surge events dissipates into the PCB and ambient environment. Lower RθJL supports short-duration pulse handling, while RθJA impacts steady-state thermal design - critical for automotive under-hood placement where ambient temperatures exceed 105 °C.
SMBG28CAHE3/52 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)
SMBG28CAHE3/52 FAQ
1.How can I place an order for SMBG28CAHE3/52 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMBG28CAHE3/52 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 SMBG28CAHE3/52 reliable?
The price and inventory of SMBG28CAHE3/52 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMBG28CAHE3/52 is usually 5 days.
3.What payment methods are accepted for SMBG28CAHE3/52?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMBG28CAHE3/52 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMBG28CAHE3/52?
SMBG28CAHE3/52 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMBG28CAHE3/52 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 SMBG28CAHE3/52?
For technical support, including SMBG28CAHE3/52 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMBG28CAHE3/52 requirements.
6.How does Aetrix verify that SMBG28CAHE3/52 is sourced from the original manufacturer or authorized distributors?
All SMBG28CAHE3/52 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 SMBG28CAHE3/52 meets industry standards.
7.What is the process for return or replacement of SMBG28CAHE3/52?
All SMBG28CAHE3/52 units undergo pre-shipment inspection (PSI). If there is an issue with SMBG28CAHE3/52, 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 SMBG28CAHE3/52 part is unused and in its original packaging.
Return procedure for SMBG28CAHE3/52:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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