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Vishay General Semiconductor - Diodes Division SMCG28CAHE3/9AT
- Part No.:
- SMCG28CAHE3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28CAHE3/9AT.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,443
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Product details
Overview
SMCG28CAHE3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) package, designed for robust overvoltage protection of sensitive electronics. It features a 28 V stand-off voltage (VWM), 31.1–34.4 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (PPPM), and clamps to ≤45.4 V at 33.0 A peak pulse current (IPPM) under 10/1000 µs waveform - deployed in automotive sensor signal lines, industrial I/O interfaces, and telecom power rails.
For engineers reviewing the SMCG28CAHE3/9AT datasheet, SMCG28CAHE3/9AT pinout, SMCG28CAHE3/9AT application, or SMCG28CAHE3/9AT equivalent, this AEC-Q101 qualified, RoHS-compliant TVS offers verified bidirectional clamping, low incremental surge resistance, and MSL Level 1 reflow compatibility - critical for high-reliability board-level ESD and lightning surge protection design.
Technical Context
The SMCG28CAHE3/9AT operates as a symmetrical, bidirectional avalanche diode with no polarity marking, enabling identical clamping behavior in both directions. Its glass-passivated junction ensures stable breakdown characteristics and fast response time (<1 ns), while the DO-215AB package supports automated placement and meets UL 94 V-0 flammability rating.
Thermally, it exhibits RθJA = 75 °C/W and RθJL = 15 °C/W, with a maximum junction temperature of +150 °C and operating range from –55 °C to +150 °C. It is rated for non-repetitive 8.3 ms surge currents up to 200 A (unidirectional only - not applicable to this bidirectional variant) and complies with ANSI/IEEE C62.35 standards for surge protectors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - maximum continuous reverse working voltage before clamping initiates |
| VBR (min/max) | 31.1 V / 34.4 V at IT = 1 mA - guaranteed avalanche onset window for predictable turn-on |
| VC @ IPPM | ≤45.4 V at 33.0 A - clamped voltage during 10/1000 µs surge, defining protected circuit stress level |
| PPPM | 1500 W - peak transient energy handling capacity under standardized surge waveform |
| ID @ VWM | ≤1.0 µA - ultra-low leakage ensuring minimal standby power loss and signal integrity |
| TJ max. | +150 °C - enables operation in under-hood automotive and industrial environments |
| AEC-Q101 | Qualified - validated for automotive-grade reliability including temperature cycling, HTRB, and ESD |
Pinout & Package
Package: SMCG (DO-215AB) - surface-mount, gull-wing leaded case with 0.31" × 0.31" copper pad footprint, matte tin-plated terminals solderable per J-STD-002/JESD 22-B102, MSL Level 1 (260 °C peak reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No polarity marking; either terminal serves as anode or cathode depending on transient polarity - enables single-device protection of AC or differential lines |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control units, ADAS sensors, and body electronics |
| Glass-passivated junction | Ensures stable VBR over lifetime and immunity to humidity-induced parameter drift |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ISO 7637-2 Pulse 1/2a) |
| MSL Level 1 rating | Supports standard SMT reflow without preconditioning - reduces manufacturing complexity |
| UL 94 V-0 molding compound | Meets flame-retardancy requirements for safety-critical industrial and telecom equipment |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting CAN/LIN bus transceivers and analog sensor inputs (e.g., pressure, temperature) from load dump and inductive switching transients in vehicle ECUs. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed across signal/power pins to limit transient excursions below IC absolute maximum ratings. Use Value: Prevents latch-up or permanent damage to microcontrollers and analog front-ends during ISO 16750-2 and ISO 7637-2 compliant surges. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to relay coil flyback and motor drive noise in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS absorbing repetitive 1500 W surges on 24 V DC input channels without degradation. Use Value: Eliminates need for external RC snubbers and extends mean time between failures (MTBF) in harsh electromagnetic environments. |
| Telecom Power Rail Protection | Consumer USB Interface Protection |
Use Scenario: Clamping induced surges on 48 V PoE (Power over Ethernet) data line pairs and auxiliary power feeds in network switches and base stations. IC Role / Device Role / Timing Role: Bidirectional suppressor co-located with Ethernet magnetics to shunt common-mode transients before reaching PHY ICs. Use Value: Maintains signal integrity by limiting clamping voltage to <45.4 V while surviving repeated 10/1000 µs surges per IEC 61000-4-5. | Use Scenario: ESD and surge protection for USB 2.0 data lines (D+/D−) and VBUS in portable audio/video devices and docking stations. IC Role / Device Role / Timing Role: Low-capacitance bidirectional TVS placed directly at connector to divert ±15 kV contact ESD (IEC 61000-4-2) and cable discharge events. Use Value: Preserves high-speed signal fidelity with sub-1 pF junction capacitance (typical) while meeting AEC-Q101 reliability for premium consumer products. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28CA-E3/57T | Same VWM (28 V) and PPPM (400 W), but lower power rating and SMA (DO-214AC) package | Limited to lower-energy transients; unsuitable for IEC 61000-4-5 Level 4 compliance | Select when cost sensitivity outweighs surge margin and PCB space allows larger SMA footprint |
| SMCJ28CAHE3/9AT | Same VWM (28 V), higher PPPM (1500 W), identical DO-215AB package, but unqualified for AEC-Q101 | Lacks automotive qualification; requires additional reliability validation for vehicle programs | Choose for industrial-only designs where AEC-Q101 is not mandated and same mechanical fit is required |
Compared with SMAJ28CA-E3/57T and SMCJ28CAHE3/9AT, the SMCG28CAHE3/9AT uniquely delivers AEC-Q101 qualification within the compact DO-215AB footprint and full 1500 W surge capability - making it the only drop-in solution for automotive Tier-1 suppliers requiring zero layout change and certified reliability.
Availability
SMCG28CAHE3/9AT is available at Aetrix Electronics and suitable for automotive sensor modules, industrial PLC I/O cards, and telecom power interface designs requiring stable component supply, long-term lifecycle assurance, and traceable AEC-Q101 sourcing.
Supply support for SMCG28CAHE3/9AT 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 SMCG series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, bidirectional surge suppression in automotive, industrial, and communications infrastructure where AEC-Q101 compliance and low clamping voltage are mandatory.
FAQ
What is the clamping voltage of SMCG28CAHE3/9AT under a 10/1000 µs surge?
The SMCG28CAHE3/9AT clamps to a maximum of 45.4 V when subjected to its rated peak pulse current of 33.0 A under the standardized 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and defines the upper voltage limit imposed on protected circuitry during surge events - critical for ensuring downstream ICs remain within their absolute maximum ratings.
Is SMCG28CAHE3/9AT suitable for automotive applications?
Yes, SMCG28CAHE3/9AT is AEC-Q101 qualified and explicitly rated for automotive use, including engine control units, ADAS sensor interfaces, and body electronics. Its qualification covers temperature cycling, high-temperature reverse bias (HTRB), and ESD testing per JESD22-A114 - confirming reliability in demanding vehicular environments where the SMCG28CAHE3/9AT must operate continuously from –40 °C to +125 °C ambient.
What does the "HE3" suffix indicate in SMCG28CAHE3/9AT?
The "HE3" suffix in SMCG28CAHE3/9AT denotes RoHS-compliant construction with AEC-Q101 qualification. Specifically, "H" indicates AEC-Q101 qualification, "E3" confirms RoHS compliance and industrial-grade reliability, and "9AT" specifies packaging in 13-inch tape-and-reel format with 3500 units per reel - distinguishing it from "57T" (7-inch reel) and "M3" (halogen-free) variants.
How does SMCG28CAHE3/9AT differ from unidirectional SMCG28A variants?
Unlike unidirectional SMCG28A, the SMCG28CAHE3/9AT is bidirectional with symmetrical breakdown and clamping in both polarities, no cathode band marking, and identical electrical specs in forward and reverse directions. This makes SMCG28CAHE3/9AT ideal for protecting AC-coupled or differential signal lines (e.g., RS-485, CAN), whereas SMCG28A is restricted to DC rail protection with defined polarity orientation.
What is the thermal resistance of SMCG28CAHE3/9AT, and how does it affect PCB layout?
The SMCG28CAHE3/9AT has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W and junction-to-lead (RθJL) of 15 °C/W, measured on the recommended 0.31" × 0.31" copper pad layout per terminal. To maintain safe junction temperatures under sustained 6.5 W power dissipation, designers must adhere to this pad size and ensure adequate copper area - undersized pads will elevate TJ and risk premature thermal failure during repetitive surge events.
SMCG28CAHE3/9AT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-215AB, SMC 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):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- 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-214AB (SMCG)
SMCG28CAHE3/9AT FAQ
1.How can I place an order for SMCG28CAHE3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28CAHE3/9AT 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 SMCG28CAHE3/9AT reliable?
The price and inventory of SMCG28CAHE3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG28CAHE3/9AT is usually 5 days.
3.What payment methods are accepted for SMCG28CAHE3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28CAHE3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28CAHE3/9AT?
SMCG28CAHE3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28CAHE3/9AT 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 SMCG28CAHE3/9AT?
For technical support, including SMCG28CAHE3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28CAHE3/9AT requirements.
6.How does Aetrix verify that SMCG28CAHE3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCG28CAHE3/9AT 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 SMCG28CAHE3/9AT meets industry standards.
7.What is the process for return or replacement of SMCG28CAHE3/9AT?
All SMCG28CAHE3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28CAHE3/9AT, 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 SMCG28CAHE3/9AT part is unused and in its original packaging.
Return procedure for SMCG28CAHE3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG28CAHE3/9AT Tags
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