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Vishay General Semiconductor - Diodes Division SMCJ28HE3/57T
- Part No.:
- SMCJ28HE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28HE3/57T.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:7,952
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Product details
Overview
SMCJ28HE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of DC power rails and signal lines. It features a 28 V standoff voltage (VWM), 31.1–34.4 V breakdown range (VBR at 1 mA), 45.4 V clamping voltage (VC) at 33.0 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - deployed in automotive ECUs, industrial I/O modules, and telecom power supplies.
For engineers reviewing the SMCJ28HE3/57T datasheet, SMCJ28HE3/57T pinout, SMCJ28HE3/57T application, or SMCJ28HE3/57T equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, 150 °C max junction temperature, RoHS-compliant matte tin leads, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
This TVS diode operates as a clamping device that remains non-conductive below its 28 V reverse standoff voltage and rapidly transitions to low-impedance conduction above its 31.1–34.4 V breakdown threshold. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and repeatable clamping performance under repetitive transients.
The device delivers 45.4 V clamping at 33.0 A (10/1000 µs), with low incremental surge resistance enabling effective suppression of fast-rising ESD and load-dump spikes. Thermal resistance is specified at RθJA = 75 °C/W (on recommended pad layout) and RθJL = 15 °C/W, supporting reliable operation up to 150 °C junction temperature.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 28 V - Maximum continuous reverse operating voltage before significant leakage begins |
| VBR (min/max) | 31.1 V / 34.4 V at 1 mA - Confirmed breakdown range defining turn-on threshold tolerance |
| VC @ IPPM | 45.4 V at 33.0 A - Clamped voltage during 1500 W transient, limiting downstream stress |
| PPPM | 1500 W - Peak pulse power handling capability with standard 10/1000 µs waveform |
| IPPM | 33.0 A - Maximum non-repetitive surge current the device safely clamps |
| TJ max | +150 °C - Maximum junction temperature enabling use in under-hood automotive environments |
| Leakage ID | ≤1.0 µA at 28 V - Ultra-low reverse leakage preserving system efficiency and signal integrity |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with molded epoxy body meeting UL 94 V-0 flammability rating. Cathode indicated by band on one end; terminals are matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional clamp configuration |
| Cathode (banded end) | Reverse-biased protection terminal | Connected to protected line (e.g., 28 V rail); conducts when transient exceeds VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD47 |
| Glass passivated junction | Ensures stable VBR tolerance, low leakage, and long-term parameter stability under thermal stress |
| MSL Level 1 (260 °C peak) | Compatible with standard lead-free reflow profiles without moisture sensitivity concerns |
| Low incremental surge resistance | Enables tighter clamping (VC − VBR = ~12.3 V) for superior protection margin |
| RoHS-compliant HE3 suffix | Meets JESD201 Class 2 whisker test and EU RoHS Directive 2011/65/EU requirements |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus power inputs in engine control units against ISO 7637-2 load dump pulses and ISO 16750-2 jump-start surges. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VBAT and chassis ground to clamp transients before they reach LDOs and microcontrollers. Use Value: Limits clamped voltage to 45.4 V, well below 60 V absolute maximum ratings of common 3.3 V/5 V PMICs used in ECUs. | Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) in PLC analog input modules exposed to field wiring transients. IC Role / Device Role / Timing Role: Placed across differential signal pair or single-ended output to shunt EFT/burst energy into local ground plane. Use Value: Sub-50 ns response time and 1.0 µA leakage preserve signal fidelity while suppressing ±2 kV ESD per IEC 61000-4-2. |
| Telecom DC Power Input Protection | Motor Drive Control Board Protection |
Use Scenario: Guarding 28 V DC input of base station remote radio units (RRUs) against lightning-induced surges on outdoor power feeds. IC Role / Device Role / Timing Role: First-line clamping device upstream of DC-DC converters and hot-swap controllers. Use Value: 1500 W peak power rating handles 10/1000 µs surges up to 33 A without degradation, verified per Telcordia GR-1089-CORE. | Use Scenario: Shielding gate driver IC supply rails in 3-phase inverter boards from switching-induced dv/dt coupling and inductive kickback. IC Role / Device Role / Timing Role: Mounted directly at VDD pins of isolated gate drivers to prevent latch-up or overvoltage damage. Use Value: 45.4 V clamping ensures gate driver VDD (typically rated 20–30 V) remains within safe operating area during 600 V bus switching events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ28A-E3/52T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, higher VC (48.4 V at 8.3 A) | Not AEC-Q101 qualified; limited to commercial-grade consumer/industrial use | Select when space constraints prohibit SMCJ footprint and 1500 W surge immunity is not required. |
| 1.5KE28A | Through-hole TO-218 package, same VWM/VC, but higher RθJA (50 °C/W) and no AEC-Q101 qualification | Requires wave soldering; unsuitable for high-vibration automotive mounting | Choose only for legacy through-hole designs where PCB redesign is prohibitive. |
Compared with SMAJ28A-E3/52T and 1.5KE28A, the SMCJ28HE3/57T provides 3.75× higher surge power handling, AEC-Q101 validation for automotive deployment, and optimized thermal performance in surface-mount form - making it the preferred choice for new designs requiring robust, production-ready TVS protection.
Availability
SMCJ28HE3/57T is available at Aetrix Electronics and suitable for automotive electronic control units, industrial programmable logic controllers, and telecom remote radio units requiring stable component supply with full traceability and lifecycle management.
Supply support for SMCJ28HE3/57T 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, precision, 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 systems demanding AEC-Q101 compliance and repeatable clamping performance.
FAQ
What is the polarity configuration of the SMCJ28HE3/57T?
The SMCJ28HE3/57T is a unidirectional TVS diode, meaning it conducts only in reverse bias above its breakdown voltage. The cathode is marked by a band on the package body. This configuration makes it ideal for protecting DC power lines where polarity is fixed, unlike bidirectional variants (e.g., SMCJ28CA) used for AC or data-line protection. The SMCJ28HE3/57T must be oriented correctly in-circuit to ensure proper clamping behavior.
Does the SMCJ28HE3/57T meet automotive qualification standards?
Yes, the SMCJ28HE3/57T is AEC-Q101 qualified, as confirmed by Vishay's documentation and the "HE3" suffix designation. This qualification covers stress tests including high-temperature reverse bias (HTRB), temperature cycling, and ESD robustness - validating its suitability for under-hood and chassis-mounted automotive applications. The SMCJ28HE3/57T is not just automotive-capable; it is formally certified for such use.
What is the maximum clamping voltage of the SMCJ28HE3/57T and at what current is it specified?
The maximum clamping voltage (VC) of the SMCJ28HE3/57T is 45.4 V, measured at a peak pulse current (IPPM) of 33.0 A using the standardized 10/1000 µs double-exponential waveform. This value defines the upper voltage limit imposed on the protected circuit during worst-case transient events and is critical for ensuring downstream components remain within their absolute maximum ratings. The SMCJ28HE3/57T maintains this clamping performance across its full operating temperature range.
How does the SMCJ28HE3/57T differ from the standard SMCJ28A-E3/57T variant?
The SMCJ28HE3/57T differs from SMCJ28A-E3/57T primarily in qualification level and whisker testing: the "H" prefix denotes AEC-Q101 qualification and JESD201 Class 2 whisker resistance, whereas the "E3"-only version is commercial-grade with Class 1A whisker testing. Both share identical electrical specs (VWM, VBR, VC, PPPM) and DO-214AB packaging. The SMCJ28HE3/57T is required for automotive production; SMCJ28A-E3/57T suffices for non-automotive applications.
What PCB layout guidance applies to the SMCJ28HE3/57T for optimal thermal and surge performance?
For optimal performance, the SMCJ28HE3/57T should be mounted on minimum 0.31″ × 0.31″ (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet. These pads improve heat dissipation and reduce impedance during surge events. Avoid narrow traces between the TVS and protected node - use short, wide copper paths to minimize inductance. The SMCJ28HE3/57T's thermal resistance drops significantly with proper pad design, directly enhancing its 1500 W surge capability and long-term reliability.
SMCJ28HE3/57T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-214AB, SMC
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28V
- Voltage - Breakdown (Min):
- 31.1V
- Voltage - Clamping (Max) @ Ipp:
- 50V
- Current - Peak Pulse (10/1000µs):
- 30A
- 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)
SMCJ28HE3/57T FAQ
1.How can I place an order for SMCJ28HE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28HE3/57T 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 SMCJ28HE3/57T reliable?
The price and inventory of SMCJ28HE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28HE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28HE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28HE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28HE3/57T?
SMCJ28HE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28HE3/57T 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 SMCJ28HE3/57T?
For technical support, including SMCJ28HE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28HE3/57T requirements.
6.How does Aetrix verify that SMCJ28HE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28HE3/57T 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 SMCJ28HE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28HE3/57T?
All SMCJ28HE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28HE3/57T, 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 SMCJ28HE3/57T part is unused and in its original packaging.
Return procedure for SMCJ28HE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28HE3/57T Tags
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