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Vishay General Semiconductor - Diodes Division SMCJ28-E3/57T
- Part No.:
- SMCJ28-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ28-E3/57T.pdf
- Description:
- TVS DIODE 28VWM 50VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,389
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Product details
Overview
SMCJ28-E3/57T 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 stand-off 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 (PPPM) with 10/1000 µs waveform.
For engineers reviewing the SMCJ28-E3/57T datasheet, SMCJ28-E3/57T pinout, SMCJ28-E3/57T application, or SMCJ28-E3/57T equivalent, this device is selected for automotive power line surge immunity (ISO 7637-2), industrial I/O port protection, and MOSFET gate driver rail clamping where fast response (<1 ns), low clamping ratio (VC/VBR ≈ 1.45), and AEC-Q101 qualification are required.
Technical Context
The SMCJ28-E3/57T operates as a silicon avalanche diode with glass-passivated junction, delivering bidirectional-capable clamping behavior only when used in unidirectional configuration with cathode band marking. Its thermal resistance (RθJA = 75 °C/W) and junction temperature limit (TJ max = 150 °C) support operation on standard 8.0 mm × 8.0 mm copper pads without forced cooling.
It complies with AEC-Q101 stress testing for automotive reliability and meets UL 497B recognition (QVGQ2) for surge protector classification. The device exhibits <1.0 µA reverse leakage at 28 V (VWM) and maintains stable clamping performance across -55 °C to +150 °C operating range, with derating applied above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Stand-off Voltage) | 28 V - Maximum continuous reverse voltage before significant conduction; defines safe operating margin below clamping threshold. |
| VBR (Breakdown Voltage) | 31.1–34.4 V at 1 mA - Avalanche onset range; ensures predictable turn-on during transients without premature triggering. |
| VC (Clamping Voltage) | 45.4 V at IPPM = 33.0 A - Peak voltage seen by protected circuit during 10/1000 µs surge; determines maximum stress on downstream components. |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capacity for standardized 10/1000 µs waveform; enables protection against ISO 7637-2 Pulse 1/2a/5a surges. |
| IR (Reverse Leakage) | ≤1.0 µA at 28 V - Minimal standby power loss and signal integrity impact in high-impedance circuits. |
| TJ max | +150 °C - Enables use in under-hood automotive environments and industrial enclosures without active cooling. |
| AEC-Q101 Qualified | Yes - Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JESD22-A110/A111. |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Polarity indicated by cathode band on one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Anode-side connection in unidirectional configuration | Connected to protected line; clamps positive transients to ground when anode is grounded. |
| Anode (non-banded end) | Reference/ground node | Typically tied to system ground or low-impedance return path; establishes reference for clamping action. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-low clamping ratio | VC/VBR ≈ 1.45 - Minimizes overvoltage exposure during surge events while maintaining margin above VWM. |
| AEC-Q101 qualification | Validated for automotive powertrain and body electronics - eliminates need for additional qualification testing in Tier 1 designs. |
| MSL Level 1 rating | Reflow-compatible up to 260 °C peak - supports standard lead-free assembly without moisture sensitivity concerns. |
| Glass-passivated junction | Enhanced long-term stability and humidity resistance - critical for industrial and outdoor deployments. |
| Low incremental surge resistance | Ensures consistent clamping performance across multiple surge events - improves system-level surge endurance. |
Applications
| Automotive Power Line Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V CAN bus power rail against load dump (ISO 7637-2 Pulse 5a) and alternator switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and local regulator input to clamp surges before LDO or DC-DC stage. Use Value: Limits peak voltage to ≤45.4 V, preventing regulator overvoltage failure and ensuring uninterrupted CAN communication during engine cranking. |
Use Scenario: Safeguarding analog output pins (e.g., 4–20 mA loop drivers) in PLC I/O modules exposed to field wiring surges. IC Role / Device Role / Timing Role: TVS mounted at connector entry point to shunt induced transients before precision op-amp or DAC stages. Use Value: Sub-1 ns response time prevents latch-up in sensitive analog circuitry; 1.0 µA leakage avoids output current error in current-loop applications. |
| MOSFET Gate Driver Rail Clamping | Telecom DC Power Input Protection |
Use Scenario: Securing high-side gate drive supply (e.g., bootstrap capacitor rail) in motor control inverters against shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: TVS connected between gate driver VDD and GND to clamp ringing and cross-conduction transients. Use Value: 1500 W PPPM handles repetitive switching energy; 45.4 V VC ensures gate oxide remains within safe 50 V rating of common 60 V MOSFETs. |
Use Scenario: Front-end protection of -48 V telecom rectifier outputs against lightning-induced surges on distribution lines. IC Role / Device Role / Timing Role: Unidirectional TVS installed between -48 V bus and chassis ground to divert common-mode surges. Use Value: UL 497B recognition confirms compliance for telecom infrastructure; 1500 W rating meets GR-1089-CORE Level 3 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 |
|---|---|---|---|
| SMBJ28A-E3/52T | Lower PPPM (600 W), smaller SMB package (DO-214AA), same VWM/VBR/VC specs | Reduced surge handling; suitable only for lower-energy threats (e.g., ESD, minor inductive spikes) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2/4-4, not ISO 7637-2. |
| SMCJ28AHE3/57T | Identical electrical specs but AEC-Q101 qualified (HE3 suffix); same DO-214AB package | No functional difference; certified for automotive use where qualification documentation is mandatory | Choose for automotive OEM programs requiring full AEC-Q101 test reports and traceability. |
Compared with SMCJ28-E3/57T, SMBJ28A-E3/52T trades surge capacity for footprint reduction, while SMCJ28AHE3/57T provides identical protection with formal automotive qualification-making it the drop-in choice where compliance documentation drives selection.
Availability
SMCJ28-E3/57T is available at Aetrix Electronics and suitable for automotive power line protection, industrial sensor interface hardening, and MOSFET gate driver rail clamping requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMCJ28-E3/57T 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, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series targets high-energy transient suppression in harsh environments, with design focus on automotive, industrial, and telecom infrastructure where AEC-Q101 qualification, UL recognition, and 1500 W surge capability are essential.
FAQ
What is the clamping voltage of the SMCJ28-E3/57T at its rated peak pulse current?
The SMCJ28-E3/57T has a maximum clamping voltage (VC) of 45.4 V at its rated peak pulse current (IPPM) of 33.0 A, measured using the standard 10/1000 µs double-exponential surge waveform. This value ensures protected circuits remain within safe voltage limits during high-energy transients, and is verified per ANSI/IEEE C62.35 test conditions specified in the Vishay datasheet 88394.
Is the SMCJ28-E3/57T suitable for automotive applications?
Yes, the SMCJ28-E3/57T is AEC-Q101 qualified and UL 497B recognized, making it suitable for automotive applications such as power line protection in body control modules, infotainment systems, and ADAS sensors. Its operating temperature range (-55 °C to +150 °C), robust surge handling (1500 W), and validated reliability testing confirm suitability for under-hood and cabin environments.
What does the "E3/57T" suffix indicate in SMCJ28-E3/57T?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with JESD 201 Class 1A whisker resistance, while "57T" specifies packaging in 7-inch plastic tape-and-reel format with 850 units per reel. This ordering code aligns with Vishay's standard SMCJ series packaging nomenclature and ensures compatibility with automated SMT placement equipment.
How does the SMCJ28-E3/57T differ from bi-directional variants like SMCJ28CA?
The SMCJ28-E3/57T is unidirectional, featuring a cathode band for polarity-sensitive placement and optimized for DC rail protection where transients occur primarily in one polarity. In contrast, SMCJ28CA is bi-directional, lacks polarity marking, and clamps both positive and negative surges-making it appropriate for AC-coupled signal lines or differential buses where polarity reversal may occur.
What PCB layout guidance applies to the SMCJ28-E3/57T for optimal thermal and electrical performance?
For optimal performance, mount the SMCJ28-E3/57T on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in the Vishay datasheet. Use short, wide traces to minimize inductance, avoid thermal reliefs on pads, and ensure grounding to a solid plane. This layout achieves the rated RθJA of 75 °C/W and supports full 1500 W surge dissipation without exceeding TJ max = 150 °C.
SMCJ28-E3/57T 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:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMCJ)
SMCJ28-E3/57T FAQ
1.How can I place an order for SMCJ28-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ28-E3/57T 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 SMCJ28-E3/57T reliable?
The price and inventory of SMCJ28-E3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ28-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ28-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ28-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ28-E3/57T?
SMCJ28-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ28-E3/57T 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 SMCJ28-E3/57T?
For technical support, including SMCJ28-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ28-E3/57T requirements.
6.How does Aetrix verify that SMCJ28-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ28-E3/57T 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 SMCJ28-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ28-E3/57T?
All SMCJ28-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ28-E3/57T, 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 SMCJ28-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ28-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ28-E3/57T Tags
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