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Vishay General Semiconductor - Diodes Division SMCJ28AHE3/57T
- Part No.:
- SMCJ28AHE3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28AHE3/57T.pdf
- Description:
- TVS DIODE 28VWM 45.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:5,512
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Product details
Overview
SMCJ28AHE3/57T from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) 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 voltage (VBR) at 1 mA, 45.4 V clamping voltage (VC) at 33.0 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 µs waveform), suitable for automotive-grade ESD and load-dump protection in engine control units and sensor interfaces.
For engineers reviewing the SMCJ28AHE3/57T datasheet, SMCJ28AHE3/57T pinout, SMCJ28AHE3/57T application, or SMCJ28AHE3/57T equivalent, key selection criteria include its AEC-Q101 qualification, unidirectional polarity with cathode band marking, low incremental surge resistance, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads per terminal.
Technical Context
This TVS diode operates as a clamping device that transitions from high-impedance to low-impedance state within picoseconds upon detecting a transient exceeding VBR, diverting surge current away from protected circuitry. Its glass-passivated junction ensures stable leakage performance and long-term reliability under repeated surge stress.
The SMCJ28AHE3/57T is rated for -55 °C to +150 °C operating junction temperature, exhibits 0.098 %/°C temperature coefficient of VBR, and delivers 1500 W peak pulse power dissipation with <1 ns response time - meeting IEC 61000-4-2 (ESD), IEC 61000-4-4 (EFT), and ISO 7637-2 (automotive transients) immunity requirements when properly mounted.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous reverse voltage before significant leakage; defines safe operating margin below clamping threshold |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Confirmed minimum/maximum voltage at which device enters avalanche conduction |
| VC (Clamping Voltage) | 45.4 V at 33.0 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; determines downstream component stress |
| PPPM (Peak Pulse Power) | 1500 W - Surge energy handling capacity under standardized 10/1000 µs waveform; enables protection against ISO 7637-2 Pulse 1 & 2b |
| IPPM (Peak Pulse Current) | 33.0 A - Maximum non-repetitive surge current the device can safely clamp without degradation |
| TJ max. | +150 °C - Maximum junction temperature; supports operation in under-hood automotive environments |
| AEC-Q101 Qualified | Yes - Validated for automotive electronics per stress test requirements including HTOL, TCT, and ESD HBM/MM |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile plastic case with matte tin-plated leads compliant with J-STD-002 and JESD 22-B102 solderability standards. Polarity indicated by cathode band on unidirectional devices.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side connection point | Connected to ground or return path; completes clamping loop during transient events |
| Cathode | High-side connection point | Marked with band; connects to protected line (e.g., 24 V rail); conducts surge current to ground when VIN > VBR |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive applications including engine control, ADAS sensors, and body electronics |
| Glass passivated junction | Ensures stable VBR and low leakage (<1 µA at VWM) across temperature and lifetime |
| MSL Level 1 rating | Compatible with standard reflow profiles up to 260 °C peak, eliminating moisture sensitivity concerns |
| 1500 W peak pulse power | Supports protection against severe transients such as ISO 7637-2 Pulse 5a (load dump) in 12 V/24 V systems |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping, reducing stress on downstream MOSFETs and ICs |
Applications
| Automotive Engine Control Unit (ECU) | Industrial PLC Digital Input Module |
|---|---|
Use Scenario: Protection of 24 V supply input against load-dump transients (ISO 7637-2 Pulse 5a) during alternator disconnection. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and input filter capacitor to clamp surges before they reach LDOs and microcontrollers. Use Value: Limits peak voltage to ≤45.4 V, preventing damage to 36 V-rated input stages and ensuring system reset-free operation after 120 V/100 ms transients. |
Use Scenario: Safeguarding 24 V digital input channels from field-wiring induced surges and inductive kickback in factory automation. IC Role / Device Role / Timing Role: Front-end clamping device on each optocoupler input path, absorbing ±1 kV EFT bursts per IEC 61000-4-4. Use Value: Maintains signal integrity by suppressing transients within <1 ns while adding negligible capacitance (<100 pF) to high-speed discrete inputs. |
| Automotive Camera Sensor Interface | Telecom Power Supply Input Stage |
Use Scenario: Protecting MIPI CSI-2 power rails (AVDD, DVDD) in rear-view cameras exposed to vehicle-level ESD and switching noise. IC Role / Device Role / Timing Role: Localized TVS adjacent to image sensor IC power pins, providing low-inductance path to chassis ground. Use Value: Clamps 8 kV contact ESD (IEC 61000-4-2) to <45.4 V within nanoseconds, avoiding latch-up or pixel corruption in CMOS image sensors. |
Use Scenario: Secondary-side overvoltage suppression on 48 V telecom rectifier outputs feeding PoE injectors and baseband processors. IC Role / Device Role / Timing Role: Final-stage transient guard before DC-DC converters, absorbing residual spikes from upstream MOVs and filters. Use Value: Handles repetitive 1500 W surges without parameter drift, enabling compliance with GR-1089-CORE lightning surge requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC28AHE3/57T | Lower PPPM (600 W), same VWM/VC; optimized for lower-energy ESD-only use | Limited to IEC 61000-4-2 only; not suitable for ISO 7637-2 load dump | Select when cost-sensitive consumer applications require basic ESD protection without automotive surge capability |
| SMCJ28CAHE3/57T | Bidirectional variant; identical VWM, VBR, VC, and PPPM, but symmetrical clamping in both polarities | Required for AC-coupled or floating signal lines (e.g., CAN bus, RS-485) where polarity reversal occurs | Choose only if protecting bidirectional data lines or circuits lacking defined ground reference |
Compared with SAC28AHE3/57T and SMCJ28CAHE3/57T, the SMCJ28AHE3/57T uniquely balances 1500 W surge capacity with AEC-Q101 qualification and unidirectional polarity - making it the preferred choice for 24 V automotive power rail protection where directional clamping and high-energy transients coexist.
Availability
SMCJ28AHE3/57T is available at Aetrix Electronics and suitable for automotive electronics, industrial control systems, and telecom infrastructure requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMCJ28AHE3/57T 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 was developed specifically for high-power transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where robustness, AEC-Q101 compliance, and precise clamping performance are mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ28AHE3/57T under a 10/1000 µs surge?
The SMCJ28AHE3/57T has a maximum clamping voltage (VC) of 45.4 V when subjected to its rated peak pulse current of 33.0 A using the standardized 10/1000 µs waveform. This value is measured per JEDEC and IEC test conditions and defines the upper voltage limit imposed on protected circuitry during worst-case transient events. The SMCJ28AHE3/57T maintains this clamping performance across its full operating temperature range (-55 °C to +150 °C).
Is the SMCJ28AHE3/57T qualified for automotive applications?
Yes, the SMCJ28AHE3/57T carries the HE3 suffix, indicating RoHS-compliant construction and full AEC-Q101 qualification. It has passed stress tests including high-temperature operating life (HTOL), temperature cycling (TCT), and human-body-model ESD (HBM), making it suitable for under-hood and cabin-mounted automotive electronics. The SMCJ28AHE3/57T is explicitly referenced in Vishay's automotive-grade product documentation for use in ECUs, ADAS modules, and body control units.
What does the "57T" suffix indicate in SMCJ28AHE3/57T?
The "57T" suffix denotes the preferred packaging configuration: 7-inch diameter plastic tape and reel, with a base quantity of 850 units per reel. This format is optimized for high-volume automated SMT assembly and complies with EIA-481 standards. The "57T" designation also confirms lead finish (matte tin), MSL Level 1 rating, and J-STD-002 solderability - all verified for the SMCJ28AHE3/57T per Vishay's ordering information table.
How does the SMCJ28AHE3/57T differ from the bidirectional SMCJ28CAHE3/57T?
The SMCJ28AHE3/57T is unidirectional, with a cathode band marking and asymmetric conduction - conducting only when anode-to-cathode voltage exceeds VBR. In contrast, the SMCJ28CAHE3/57T is bidirectional, offering symmetrical clamping for AC signals or floating nodes. Both share identical VWM (28 V), VC (45.4 V), and PPPM (1500 W), but the SMCJ28AHE3/57T is selected for DC power rail protection, whereas the CA variant is used for data lines like CAN or RS-485 where polarity reversals occur.
What thermal resistance values apply to the SMCJ28AHE3/57T?
The SMCJ28AHE3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pad per terminal, and a junction-to-lead resistance (RθJL) of 15 °C/W. These values are critical for calculating steady-state junction temperature rise under continuous power dissipation (PD = 6.5 W) and must be applied with actual PCB layout data to ensure operation remains within the +150 °C TJ max. limit.
SMCJ28AHE3/57T 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ28AHE3/57T FAQ
1.How can I place an order for SMCJ28AHE3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28AHE3/57T 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 SMCJ28AHE3/57T reliable?
The price and inventory of SMCJ28AHE3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28AHE3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28AHE3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28AHE3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28AHE3/57T?
SMCJ28AHE3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28AHE3/57T 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 SMCJ28AHE3/57T?
For technical support, including SMCJ28AHE3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28AHE3/57T requirements.
6.How does Aetrix verify that SMCJ28AHE3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28AHE3/57T 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 SMCJ28AHE3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28AHE3/57T?
All SMCJ28AHE3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28AHE3/57T, 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 SMCJ28AHE3/57T part is unused and in its original packaging.
Return procedure for SMCJ28AHE3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28AHE3/57T Tags
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