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Vishay General Semiconductor - Diodes Division SMCG28CAHE3/57T
- Part No.:
- SMCG28CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-215AB, SMC Gull Wing
- Datasheet:
-
SMCG28CAHE3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO215AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,713
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Product details
Overview
SMCG28CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in the SMCG (DO-215AB) surface-mount package, designed for clamping fast-rising ESD and surge transients. 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 (10/1000 µs), 33.0 A peak pulse current (IPPM), and clamps to ≤45.4 V at rated IPPM. It is AEC-Q101 qualified and used to protect automotive sensor signal lines against inductive switching surges.
For engineers reviewing the SMCG28CAHE3/57T datasheet, SMCG28CAHE3/57T pinout, SMCG28CAHE3/57T application, or SMCG28CAHE3/57T equivalent, key selection criteria include bidirectional clamping capability, 1500 W surge rating, DO-215AB thermal performance (RθJA = 75 °C/W), AEC-Q101 qualification, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This bidirectional TVS operates symmetrically across both polarities, delivering identical clamping behavior in forward and reverse directions per ANSI/IEEE C62.35 standards. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance under repetitive transient stress.
The device is optimized for high-energy transient suppression in automotive ECUs and ADAS sensor interfaces, where fast response time (<1 ns), low clamping voltage, and MSL Level 1 moisture sensitivity compliance (260 °C reflow) are critical. It does not conduct at 28 V DC but triggers robustly above ~31.1 V to limit downstream voltage excursions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse/forward voltage before clamping begins; defines operating margin for 24 V automotive systems. |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown threshold range; ensures reliable triggering without premature conduction. |
| VC @ IPPM | ≤45.4 V at 33.0 A - Clamped voltage during 10/1000 µs surge; limits stress on protected ICs like CAN transceivers or ADC inputs. |
| PPPM | 1500 W - Peak pulse power handling per 10/1000 µs waveform; supports IEC 61000-4-5 Level 4 (4 kV) surge immunity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Package | SMCG (DO-215AB) - Low-profile SMD outline with 0.220–0.245" body length; compatible with standard 7" tape-and-reel (57T) feeding. |
| AEC-Q101 | Qualified - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per AEC specification. |
Pinout & Package
SMCG28CAHE3/57T uses the DO-215AB (SMCG) surface-mount package: a symmetrical, bidirectional two-terminal device with no polarity marking. The case is molded in UL 94 V-0 compliant compound; terminals are matte tin-plated for J-STD-002 solderability. Mounting requires 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal for rated power dissipation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as anode or cathode depending on transient polarity; no functional distinction in circuit layout. |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; device functions identically regardless of orientation on PCB. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or differential signal lines (e.g., LIN, CAN FD stubs) without polarity constraints. |
| 1500 W peak pulse power | Withstands 4 kV IEC 61000-4-5 surge events common in automotive powertrain and chassis modules. |
| AEC-Q101 qualification | Validates long-term reliability under automotive thermal, mechanical, and electrical stress profiles-no additional qualification needed. |
| MSL Level 1 (260 °C) | Supports standard lead-free reflow without baking or special handling, reducing manufacturing overhead. |
| Glass-passivated junction | Ensures stable VBR over lifetime and temperature, minimizing drift in safety-critical clamping thresholds. |
Applications
| Automotive Sensor Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting analog output lines of wheel speed sensors and pressure transducers in engine control units exposed to load dump and inductive kickback. IC Role / Device Role / Timing Role: Bidirectional voltage clamp placed between signal line and ground, responding within <1 ns to transients exceeding 31.1 V. Use Value: Limits voltage seen by downstream op-amps and ADCs to ≤45.4 V, preventing latch-up or permanent damage during 100 A surge events. |
Use Scenario: Safeguarding 24 V digital input channels on programmable logic controllers subjected to field-wiring induced surges. IC Role / Device Role / Timing Role: Standoff device shunting transient energy away from optocoupler input stages during relay coil de-energization. Use Value: Maintains 28 V system integrity while clamping 1500 W surges-enabling >100,000 actuation cycles without degradation. |
| Automotive Body Control Module | Telecom Interface Protection |
Use Scenario: Shielding LIN bus transceivers in door module ECUs from battery reversal and jump-start transients. IC Role / Device Role / Timing Role: Symmetrical TVS connected across LIN data pair (LIN_H/L), conducting equally in both directions during overvoltage. Use Value: Prevents transceiver damage while preserving signal integrity up to 20 kbps due to low capacitance (<100 pF at 0 V). |
Use Scenario: Protecting RS-485 transceiver inputs in base station remote radio units exposed to lightning-induced surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary front-end clamp on differential bus lines, absorbing energy before it reaches internal protection diodes. Use Value: Delivers 1500 W surge handling with ≤45.4 V clamping-reducing need for secondary protection and board space. |
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 | Same VWM (28 V) and bidirectional configuration, but lower PPPM (400 W) and smaller SMA (DO-214AC) package with higher RθJA (110 °C/W). | Limited to lower-energy surges (IEC 61000-4-5 Level 2); unsuitable for under-hood automotive locations requiring 1500 W rating. | Select SMAJ28CA only for cost-sensitive industrial controls where surge threat level is known to be ≤400 W. |
| SMBJ28CA | Same VWM and bidirectional function, rated for 600 W PPPM in SMB (DO-214AA) package; RθJA = 90 °C/W; AEC-Q101 not specified. | Not qualified for automotive use; thermal derating limits sustained surge duty cycle in high-ambient environments. | Choose SMBJ28CA for non-automotive 24 V systems with moderate surge exposure and tighter board area constraints than DO-215AB allows. |
Compared with SMAJ28CA and SMBJ28CA, SMCG28CAHE3/57T delivers 2.5× and 2.5× higher peak pulse power respectively, with AEC-Q101 validation and superior thermal dissipation-making it the only option qualified for demanding automotive powertrain and ADAS signal protection.
Availability
SMCG28CAHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply, AEC-Q101 compliance, and high-energy transient suppression.
Supply support for SMCG28CAHE3/57T 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 was developed specifically for high-power, automotive-grade transient suppression in space-constrained SMT designs-targeting ECU, ADAS, and body electronics where 1500 W surge handling and AEC-Q101 validation are mandatory.
FAQ
What is the clamping voltage of SMCG28CAHE3/57T at its rated peak pulse current?
The SMCG28CAHE3/57T clamps to a maximum of 45.4 V when subjected to its rated 33.0 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in the Vishay datasheet revision 09-Jan-2024, ensuring predictable overvoltage limiting for protected circuitry.
Is SMCG28CAHE3/57T suitable for automotive applications?
Yes, SMCG28CAHE3/57T is AEC-Q101 qualified and explicitly rated for automotive use. Its construction-including glass-passivated junction, MSL Level 1 reflow compatibility, and operation from –55 °C to +150 °C-meets requirements for engine bay, chassis, and ADAS modules. The "HE3" suffix denotes AEC-Q101 qualification per Vishay's ordering nomenclature.
Does SMCG28CAHE3/57T have polarity markings on the package?
No, SMCG28CAHE3/57T is a bidirectional TVS diode and carries no polarity marking. As stated in the Vishay datasheet, "no marking on bidirectional types." Both terminals are functionally identical, allowing unrestricted orientation during PCB layout and automated placement-simplifying design and assembly.
What is the thermal resistance of SMCG28CAHE3/57T, and how does it affect layout?
The SMCG28CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. This value assumes the minimum recommended pad layout; reducing pad area increases thermal impedance and may require derating IPPM at elevated ambient temperatures per Figure 2 in the datasheet.
How does the "57T" suffix in SMCG28CAHE3/57T define packaging and delivery?
The "57T" suffix indicates a 7-inch diameter plastic tape-and-reel packaging format containing 850 units per reel. This is the standard delivery mode for SMCG28CAHE3/57T at Aetrix Electronics and aligns with Vishay's preferred ordering code for automated SMT assembly. Reel dimensions and orientation comply with EIA-481-D standards.
SMCG28CAHE3/57T 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)
SMCG28CAHE3/57T FAQ
1.How can I place an order for SMCG28CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCG28CAHE3/57T 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 SMCG28CAHE3/57T reliable?
The price and inventory of SMCG28CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCG28CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCG28CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCG28CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCG28CAHE3/57T?
SMCG28CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCG28CAHE3/57T 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 SMCG28CAHE3/57T?
For technical support, including SMCG28CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCG28CAHE3/57T requirements.
6.How does Aetrix verify that SMCG28CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCG28CAHE3/57T 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 SMCG28CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCG28CAHE3/57T?
All SMCG28CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCG28CAHE3/57T, 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 SMCG28CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCG28CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCG28CAHE3/57T Tags
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