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Vishay General Semiconductor - Diodes Division SMCJ28CAHE3/57T
- Part No.:
- SMCJ28CAHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28CAHE3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,498
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Product details
Overview
SMCJ28CAHE3/57T from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features a 28 V stand-off voltage (VWM), 45.4 V maximum clamping voltage at 33.0 A peak pulse current (10/1000 µs), and 1500 W peak pulse power dissipation - deployed to protect MOSFETs, ICs, and sensor interfaces in automotive and industrial power supplies.
For engineers reviewing the SMCJ28CAHE3/57T datasheet, SMCJ28CAHE3/57T pinout, SMCJ28CAHE3/57T application, or SMCJ28CAHE3/57T equivalent, key selection criteria include bidirectional clamping symmetry, AEC-Q101 qualification, 1500 W surge capability, low incremental surge resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This device operates as a voltage-clamped crowbar during transients, leveraging an avalanche breakdown mechanism with symmetrical bidirectional conduction. Its glass-passivated junction ensures stable VBR (31.1–34.4 V at 1 mA) and low temperature coefficient (0.098 %/°C), enabling predictable clamping across -55 °C to +150 °C operating range.
Designed for unclamped inductive switching events and lightning-induced surges, it delivers sub-nanosecond response time and meets UL 497B recognition (QVGQ2) and JESD201 Class 2 whisker resistance. The SMCJ28CAHE3/57T variant is RoHS-compliant and AEC-Q101 qualified, distinguishing it from commercial-grade E3/M3 versions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse working voltage before clamping begins; defines safe operating margin below breakdown. |
| 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 (10/1000 µs) - Clamping voltage under full-rated surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPPM | 1500 W - Peak pulse power handling capacity; supports IEC 61000-4-5 Level 4 (4 kV/2 Ω) surge immunity design. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive environments and high-ambient industrial enclosures. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient on standard pad layout; informs derating requirements above 25 °C ambient. |
| AEC-Q101 | Qualified - Validated for automotive electronics per stress test requirements including HTGB, HTRB, and TCT; required for engine control, ADAS, and body modules. |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, bidirectional configuration with no polarity marking. Dimensions: 7.75 mm × 6.22 mm × 2.62 mm (L × W × H); matte tin-plated leads compliant with J-STD-002 and JESD22-B102.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient current entry (bidirectional) | Either terminal accepts surge current in either direction; symmetric clamping eliminates need for orientation during placement. |
| Cathode | Transient current entry (bidirectional) | Functionally identical to Anode in CA-series devices; no band marking required per spec. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines, differential buses, and floating sensors without polarity constraints. |
| AEC-Q101 qualification | Validates reliability for automotive applications including powertrain, chassis, and infotainment systems per JEDEC stress protocols. |
| 1500 W peak pulse rating | Supports robust protection against IEC 61000-4-5 combination wave surges up to 4 kV open-circuit voltage. |
| Low clamping ratio (VC/VBR ≈ 1.43) | Minimizes voltage overshoot during clamping - critical for safeguarding 3.3 V/5 V logic and low-voltage MOSFET gate drivers. |
| MSL Level 1 (260 °C peak) | Permits standard lead-free reflow without moisture sensitivity concerns; eliminates bake-out requirement pre-assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Primary clamping element placed at input filter stage to shunt surge energy before DC-DC converters and microcontrollers. Use Value: Withstands 1500 W pulses and maintains clamping below 45.4 V, preventing latch-up or gate oxide damage in downstream 3.3 V/5 V logic. | Use Scenario: Safeguarding analog front-ends of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: Bidirectional TVS placed across differential signal pairs (e.g., RS-485, CAN FD) to absorb ESD and fast transients. Use Value: Symmetric 31.1–34.4 V breakdown ensures equal protection on both signal polarities without polarity-aware routing. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Front-end protection of PoE-powered Ethernet switches against lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired across transformer-coupled data lines to clamp mode-common transients while preserving signal integrity. Use Value: Low 0.098 %/°C VBR drift ensures stable clamping performance across wide ambient ranges in outdoor cabinets. | Use Scenario: Input-stage protection of BLDC motor controllers in washing machines and HVAC systems. IC Role / Device Role / Timing Role: Mounted directly at bridge rectifier output to suppress inductive kickback from relay coils and motor windings. Use Value: 200 A non-repetitive forward surge rating (IFSM) handles repetitive commutation spikes without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28AHE3/A | Unidirectional; lower PPPM (400 W); SMA package (smaller footprint, higher RθJA). | Limited to DC-biased lines; unsuitable for AC or floating differential signals. | Select only when polarity is fixed and surge energy is ≤400 W. |
| SMCJ28CAHM3/57T | Halogen-free, RoHS-compliant, AEC-Q101 qualified - identical electrical specs and package. | No functional difference; differs only in material composition (halogen-free molding compound). | Choose HM3 when halogen-free compliance is mandated by OEM or regional environmental regulations. |
Compared with SMAJ28AHE3/A and SMCJ28CAHM3/57T, the SMCJ28CAHE3/57T uniquely balances 1500 W surge capacity, bidirectional symmetry, and automotive qualification in the SMC package - making it optimal for high-reliability, mixed-polarity protection where space and thermal performance permit the larger footprint.
Availability
SMCJ28CAHE3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge protection, and consumer appliance motor drive inputs requiring stable component supply and long-term lifecycle support.
Supply support for SMCJ28CAHE3/57T 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 SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where AEC-Q101 validation and 1500 W surge resilience are mandatory.
FAQ
What is the clamping voltage of SMCJ28CAHE3/57T at its rated peak pulse current?
The SMCJ28CAHE3/57T has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current (IPPM) of 33.0 A under the standard 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and confirmed in Vishay's Document Number 88394, ensuring predictable overvoltage limiting for downstream circuitry.
Is SMCJ28CAHE3/57T suitable for automotive applications?
Yes, the SMCJ28CAHE3/57T is AEC-Q101 qualified and explicitly designated for automotive use via its "HE3" suffix. It undergoes rigorous stress testing including high-temperature reverse bias (HTRB), high-temperature gate bias (HTGB), and temperature cycling - making it appropriate for engine control units, ADAS camera modules, and body electronics where reliability under thermal and electrical stress is critical.
How does the bidirectional nature of SMCJ28CAHE3/57T affect PCB layout?
The SMCJ28CAHE3/57T has no polarity marking and functions identically in both directions, eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, it requires no cathode band alignment - simplifying layout, reducing assembly errors, and enabling direct placement across AC-coupled or floating differential lines such as RS-485 or CAN bus pairs.
What is the thermal resistance of SMCJ28CAHE3/57T, and how does it impact power derating?
The SMCJ28CAHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 8.0 mm × 8.0 mm copper pads per terminal. This value dictates linear derating of its 6.5 W steady-state power dissipation above 25 °C ambient - for example, at 85 °C ambient, usable PD drops to approximately 2.3 W per Vishay's Fig. 2 derating curve.
Does SMCJ28CAHE3/57T meet UL safety standards?
Yes, the SMCJ28CAHE3/57T carries Underwriters Laboratories recognition under UL 497B (QVGQ2) for protector classification, with file number E136766. This certification applies to both unidirectional and bidirectional variants and confirms compliance for use in telecom, industrial, and automotive equipment requiring recognized surge protection components.
SMCJ28CAHE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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 (SMCJ)
SMCJ28CAHE3/57T FAQ
1.How can I place an order for SMCJ28CAHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28CAHE3/57T 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 SMCJ28CAHE3/57T reliable?
The price and inventory of SMCJ28CAHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28CAHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28CAHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28CAHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28CAHE3/57T?
SMCJ28CAHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28CAHE3/57T 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 SMCJ28CAHE3/57T?
For technical support, including SMCJ28CAHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28CAHE3/57T requirements.
6.How does Aetrix verify that SMCJ28CAHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28CAHE3/57T 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 SMCJ28CAHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28CAHE3/57T?
All SMCJ28CAHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28CAHE3/57T, 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 SMCJ28CAHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ28CAHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28CAHE3/57T Tags
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