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Vishay General Semiconductor - Diodes Division SMCJ22A-E3/57T
- Part No.:
- SMCJ22A-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22A-E3/57T.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:1,593
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Product details
Overview
SMCJ22A-E3/57T from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients on power and signal lines. It features a 22 V standoff voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V maximum clamping voltage (VC) at 42.3 A peak pulse current (IPPM), and 1500 W peak pulse power (PPPM) with 10/1000 µs waveform - deployed in automotive power rail protection and industrial sensor interface circuits.
For engineers reviewing the SMCJ22A-E3/57T datasheet, SMCJ22A-E3/57T pinout, SMCJ22A-E3/57T application, or SMCJ22A-E3/57T equivalent, key selection criteria include unidirectional polarity, 1500 W surge capability, 22 V operating voltage range, thermal resistance (RθJA = 75 °C/W), and AEC-Q101 qualification eligibility via HE3 suffix variants.
Technical Context
The SMCJ22A-E3/57T operates as a silicon avalanche diode that enters breakdown when reverse voltage exceeds its VBR range (24.4–26.9 V), limiting transient energy by shunting surge current to ground. Its glass-passivated junction ensures stable leakage (<1.0 µA at VWM) and fast response time (<1.0 ps), critical for protecting downstream MOSFETs and ICs from ESD and inductive switching spikes.
Rated for -55 °C to +150 °C junction temperature, it delivers 1500 W peak pulse power under standardized 10/1000 µs waveform conditions on 8.0 mm × 8.0 mm copper pads. The device meets MSL Level 1 per J-STD-020 and supports automated SMT placement with matte tin-plated leads compliant to J-STD-002 and JESD 22-B102.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC/AC working range. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - Confirmed avalanche onset range; ensures predictable turn-on margin above VWM. |
| VC @ IPPM | 35.5 V at 42.3 A - Clamped voltage during 1500 W transient; determines maximum stress on protected circuitry. |
| PPPM | 1500 W - Peak surge power handling with 10/1000 µs waveform; validates robustness against lightning and load dump events. |
| IR @ VWM | ≤1.0 µA - Reverse leakage at rated standoff voltage; guarantees minimal standby power loss and signal integrity. |
| TJ max | +150 °C - Maximum junction temperature; enables operation in under-hood automotive and high-ambient industrial environments. |
| RθJA | 75 °C/W - Thermal resistance junction-to-ambient; informs heatsinking requirements for sustained power dissipation. |
Pinout & Package
Package: SMC (DO-214AB) - Surface-mount, low-profile case with cathode band marking; dimensions 7.11 mm × 6.22 mm × 2.62 mm; UL 94 V-0 compliant molding compound; matte tin-plated leads.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional configuration. |
| Cathode | Reverse-biased clamping terminal | Marked with band; connects to protected line (e.g., 24 V rail or sensor output) to absorb positive transients. |
Key Features
| Feature | Design Value |
|---|---|
| Low-profile SMC package | Enables high-density PCB layouts and compatibility with standard SMT reflow profiles (peak 260 °C). |
| Glass-passivated junction | Ensures long-term reliability and stable VBR drift over temperature and lifetime vs. epoxy-passivated alternatives. |
| 1500 W peak pulse rating | Withstands ISO 7637-2 Pulse 5a (load dump) and IEC 61000-4-5 surge events without degradation. |
| AEC-Q101 qualification path | HE3/M3 suffix variants are automotive-qualified; E3 suffix is commercial-grade but shares identical die and construction. |
| MSL Level 1 rating | Allows unlimited floor life and reflow without baking; simplifies manufacturing logistics for high-volume production. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules (BCMs) from load dump and jump-start transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamping element placed between battery rail and point-of-load regulator input. Use Value: Limits transient voltage to ≤35.5 V, preventing damage to 36 V-rated DC/DC converters and microcontrollers. |
Use Scenario: Shielding analog outputs of pressure/temperature sensors in PLC I/O modules from ESD and cable discharge events. IC Role / Device Role / Timing Role: Low-capacitance transient suppressor on 4–20 mA or 0–10 V signal paths upstream of ADC inputs. Use Value: Sub-1 µA leakage preserves signal accuracy; fast response prevents latch-up in precision front-end amplifiers. |
| Consumer Power Adapter Input Stage | Telecom DC Feeder Line Surge Suppression |
Use Scenario: Secondary-side overvoltage protection in universal AC/DC adapters powering USB-C PD devices. IC Role / Device Role / Timing Role: Standoff-clamp TVS across +5 V/9 V/15 V/20 V output rails to absorb flyback spikes and hot-plug surges. Use Value: 22 V VWM aligns with 20 V PD3.1 maximum; 1500 W rating exceeds UL 62368-1 surge test requirements. |
Use Scenario: Primary protection on -48 V DC feeder lines feeding remote radio units (RRUs) in 4G/5G base stations. IC Role / Device Role / Timing Role: Unidirectional clamp referenced to system ground, absorbing longitudinal surges induced by nearby lightning strikes. Use Value: 35.5 V clamping ensures protected PoE-like interface ICs remain below absolute maximum ratings during IEC 61000-4-5 Level 4 tests. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22A-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VBR/VC specs. | Reduced surge margin; suitable only for non-automotive, low-energy signal lines. | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 contact discharge. |
| SMCJ22CA-E3/57T | Bidirectional variant; identical VWM (22 V), VBR (24.4–26.9 V), VC (35.5 V), and PPPM (1500 W). | Supports AC-coupled or floating lines (e.g., RS-485, CAN bus) where polarity reversal occurs. | Choose for differential or symmetrical signal paths requiring clamping in both directions. |
Compared with SMBJ22A-E3/52T, the SMCJ22A-E3/57T provides 2.5× higher surge power handling and better thermal performance due to larger SMC package; versus SMCJ22CA-E3/57T, it offers lower cost and simpler biasing for unidirectional DC rails but lacks bidirectional symmetry.
Availability
SMCJ22A-E3/57T is available at Aetrix Electronics and suitable for automotive ECUs, industrial sensor interfaces, consumer power adapters, and telecom DC feeder lines requiring stable component supply, RoHS-compliant sourcing, and volume-ready tape-and-reel packaging (850 pcs per 7″ reel).
Supply support for SMCJ22A-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, MOSFETs, and protection devices with emphasis on reliability, power efficiency, and automotive-grade qualification.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom infrastructure where robustness against load dump, ESD, and lightning-induced surges is mandatory.
FAQ
What is the maximum clamping voltage of the SMCJ22A-E3/57T under full-rated surge conditions?
The SMCJ22A-E3/57T exhibits a maximum clamping voltage (VC) of 35.5 V when subjected to its rated 42.3 A peak pulse current (IPPM) using the standard 10/1000 µs waveform. This value is measured at TJ = 25 °C on recommended 8.0 mm × 8.0 mm copper pads and defines the upper voltage limit imposed on protected circuitry during worst-case transients.
Is the SMCJ22A-E3/57T suitable for automotive applications?
The SMCJ22A-E3/57T itself carries the commercial-grade E3 suffix and is not AEC-Q101 qualified; however, it shares identical die, construction, and electrical characteristics with the AEC-Q101-qualified SMCJ22A-HE3 variant. For production automotive use, specify SMCJ22A-HE3_X (e.g., SMCJ22A-HE3_A); the SMCJ22A-E3/57T serves as a drop-in evaluation or non-automotive alternative.
How does the SMCJ22A-E3/57T differ from the SMCJ22CA-E3/57T?
The SMCJ22A-E3/57T is unidirectional with cathode-band polarity, while the SMCJ22CA-E3/57T is bidirectional and unmarked. Both share identical VWM (22 V), VBR (24.4–26.9 V), VC (35.5 V), and PPPM (1500 W), but the CA version clamps symmetrically in both directions - making it appropriate for AC signals or floating buses like CAN or RS-485, whereas the A version is optimized for DC power rails.
What is the thermal resistance and maximum junction temperature of the SMCJ22A-E3/57T?
The SMCJ22A-E3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on minimum recommended pad layout, and a maximum junction temperature (TJ max) of +150 °C. These values enable reliable operation in under-hood automotive environments and enclosed industrial enclosures without forced airflow, provided power dissipation remains within derated limits above 25 °C ambient.
Does the SMCJ22A-E3/57T require a heatsink for standard surge duty cycles?
No external heatsink is required for single-event surge suppression, as the 1500 W rating applies to non-repetitive pulses (e.g., load dump, ESD). However, for repetitive surge conditions or elevated ambient temperatures (>70 °C), thermal design must account for RθJA = 75 °C/W and ensure average power dissipation (PD = 6.5 W) stays within safe limits - typically achieved via adequate copper pour area rather than discrete heatsinks.
SMCJ22A-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 42.3A
- 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)
SMCJ22A-E3/57T FAQ
1.How can I place an order for SMCJ22A-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22A-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 SMCJ22A-E3/57T reliable?
The price and inventory of SMCJ22A-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 SMCJ22A-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ22A-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22A-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22A-E3/57T?
SMCJ22A-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22A-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 SMCJ22A-E3/57T?
For technical support, including SMCJ22A-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22A-E3/57T requirements.
6.How does Aetrix verify that SMCJ22A-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ22A-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 SMCJ22A-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ22A-E3/57T?
All SMCJ22A-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22A-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 SMCJ22A-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ22A-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22A-E3/57T Tags
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