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Vishay General Semiconductor - Diodes Division SMCJ22-E3/57T
- Part No.:
- SMCJ22-E3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22-E3/57T.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,952
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Product details
Overview
SMCJ22-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 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 1500 W peak pulse power (10/1000 µs), clamping voltage of 35.5 V at 42.3 A, and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SMCJ22-E3/57T datasheet, SMCJ22-E3/57T pinout, SMCJ22-E3/57T application, or SMCJ22-E3/57T equivalent, key selection criteria include clamping performance under 10/1000 µs surge, junction temperature derating above 25 °C, unidirectional polarity marking (cathode band), RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22-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 clamping to ≤35.5 V at 42.3 A. Its low incremental surge resistance ensures minimal voltage overshoot during fast transients such as ISO 7637-2 pulse 1/2a/5a or IEC 61000-4-5 surges.
Thermal design relies on RθJA = 75 °C/W (on recommended pad layout) and RθJL = 15 °C/W, enabling operation up to TJ = 150 °C. The device meets MSL Level 1 per J-STD-020 with 260 °C reflow peak, and its glass-passivated junction provides stable leakage (<1.0 µA at 22 V) and long-term reliability under repetitive surge stress.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - Confirmed avalanche onset range; ensures predictable turn-on across production lot. |
| VC @ IPPM | 35.5 V at 42.3 A (10/1000 µs) - Clamped voltage during worst-case surge; determines protected circuit's maximum stress level. |
| PPPM | 1500 W - Peak pulse power handling capability; supports high-energy transients without failure. |
| ID @ VWM | ≤1.0 µA - Reverse leakage current at rated stand-off; negligible power loss and noise contribution in standby. |
| TJ max. | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with thermal margin. |
| Package | DO-214AB (SMCJ) - Surface-mount outline with J-bend leads; compatible with standard SMT pick-and-place and reflow profiles. |
Pinout & Package
DO-214AB (SMCJ) package: molded epoxy case with matte tin-plated J-bend leads, cathode indicated by a band on one end. Leads are solderable per J-STD-002 and JESD 22-B102; meets UL 94 V-0 flammability rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal (cathode-banded side is opposite) | Connected to ground or lower-potential node in unidirectional configuration; defines current path during clamping. |
| Cathode | Reverse-biased terminal (marked with band) | Connected to protected line (e.g., 24 V rail); avalanche breakdown occurs when voltage exceeds VBR relative to anode. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive applications including engine control units and body electronics per stress test requirements. |
| Glass passivated junction | Ensures stable VBR and low leakage over temperature and lifetime; eliminates surface contamination sensitivity. |
| MSL Level 1 (260 °C peak) | Supports single-reflow assembly without moisture-induced damage; no baking required prior to SMT placement. |
| Low incremental surge resistance | Minimizes clamping voltage overshoot during fast-rising transients (e.g., ESD, load dump), improving system immunity. |
| 1500 W peak pulse power (10/1000 µs) | Handles high-energy surges common in industrial motor drives and automotive power distribution networks. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control modules against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery rail and downstream DC/DC converter input. Use Value: Clamps 1500 W surges to ≤35.5 V, preventing overvoltage damage to switching regulators and microcontrollers. |
Use Scenario: Safeguarding analog sensor outputs (e.g., pressure, temperature) connected to PLC I/O modules. IC Role / Device Role / Timing Role: Point-of-entry protection on 0–10 V or 4–20 mA signal lines exposed to field wiring transients. Use Value: Sub-µA leakage at 22 V avoids signal offset; fast response limits transient duration seen by precision ADC front-ends. |
| Telecom DC Power Input Protection | Consumer Device USB Port Protection |
Use Scenario: Securing 24 V or 48 V DC inputs of telecom base station power supplies against lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS on bulk input stage before active rectification and filtering. Use Value: 1500 W rating absorbs multi-kA induced surges; DO-214AB footprint allows high-current PCB trace routing. |
Use Scenario: Overvoltage protection on VBUS line of USB-C ports in portable monitors or docking stations. IC Role / Device Role / Timing Role: Secondary protection after upstream fuse or eFuse, clamping fast ESD events (IEC 61000-4-2). Use Value: 35.5 V clamping prevents damage to USB PD controllers; AEC-Q101 qualification ensures manufacturing reliability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC22 | Lower PPPM (600 W), smaller DO-214AC (SMA) package, higher VBR tolerance (±10%) | Better suited for space-constrained consumer interfaces; insufficient for automotive load dump. | Select SAC22 only where surge energy is limited to <600 W and board area is critical. |
| SMCJ22AHE3/57T | Identical electrical specs but AEC-Q101 qualified version (HE3 suffix); same DO-214AB package and marking. | Required for automotive OEM designs requiring full AEC-Q101 documentation and traceability. | Choose SMCJ22AHE3/57T when compliance certification and lot-level test reports are mandatory. |
Compared with SAC22 and SMCJ22AHE3/57T, the SMCJ22-E3/57T offers optimal balance of 1500 W surge capacity, automotive-grade process control (E3 whisker-tested leads), and commercial-grade cost-making it ideal for industrial and Tier-2 automotive applications where full AEC-Q101 certification is not mandated but robustness is essential.
Availability
SMCJ22-E3/57T is available at Aetrix Electronics and suitable for automotive power systems, industrial sensor interfaces, telecom DC inputs, and consumer USB-C port protection requiring stable component supply and consistent surge performance across production batches.
Supply support for SMCJ22-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series belongs to Vishay's TRANSZORB® TVS family, engineered for high-energy transient suppression in harsh environments-including automotive, industrial, and telecom infrastructure-where clamping accuracy, surge endurance, and thermal stability are critical.
FAQ
What is the clamping voltage of the SMCJ22-E3/57T under a 10/1000 µs surge?
The SMCJ22-E3/57T clamps to a maximum of 35.5 V when subjected to its rated peak pulse current of 42.3 A using the standardized 10/1000 µs waveform. This value is measured at the device terminals under specified test conditions (TA = 25 °C, mounted on 8.0 mm × 8.0 mm copper pads) and represents the upper limit of voltage seen by downstream circuitry during surge events.
Is the SMCJ22-E3/57T suitable for automotive applications?
Yes, the SMCJ22-E3/57T is RoHS-compliant and manufactured with JESD 201 Class 1A whisker-tested leads, but it is not AEC-Q101 qualified. For non-critical automotive subsystems (e.g., infotainment power rails), it provides robust protection; however, for safety-critical or OEM-specified locations, the AEC-Q101-qualified SMCJ22AHE3/57T variant should be used instead.
How does the SMCJ22-E3/57T differ from bi-directional SMCJ22CA variants?
The SMCJ22-E3/57T is unidirectional, featuring a cathode band and conducting forward current like a rectifier, while SMCJ22CA is bi-directional with no polarity marking and symmetric clamping in both directions. The SMCJ22-E3/57T has lower leakage at VWM (≤1.0 µA vs. ≤1000 µA for CA types) and is intended for DC rail protection where polarity is fixed.
What is the thermal resistance of the SMCJ22-E3/57T in typical PCB mounting?
The SMCJ22-E3/57T exhibits a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on the minimum recommended 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per lead. Its junction-to-lead resistance (RθJL) is 15 °C/W, supporting efficient heat transfer to the PCB in high-power surge scenarios.
Can the SMCJ22-E3/57T be used in place of the older SMCJ22A part?
Yes-the SMCJ22-E3/57T is the current RoHS-compliant, tape-and-reel packaged version of the legacy SMCJ22A, with identical electrical specifications, DO-214AB package dimensions, and pinout. The "E3" suffix denotes matte tin plating compliant with JESD 201 Class 1A, and "57T" indicates 7" tape-and-reel packaging (850 units per reel).
SMCJ22-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):
- 22V
- Voltage - Breakdown (Min):
- 24.4V
- Voltage - Clamping (Max) @ Ipp:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 38.1A
- 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)
SMCJ22-E3/57T FAQ
1.How can I place an order for SMCJ22-E3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22-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 SMCJ22-E3/57T reliable?
The price and inventory of SMCJ22-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 SMCJ22-E3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ22-E3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22-E3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22-E3/57T?
SMCJ22-E3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22-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 SMCJ22-E3/57T?
For technical support, including SMCJ22-E3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22-E3/57T requirements.
6.How does Aetrix verify that SMCJ22-E3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ22-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 SMCJ22-E3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ22-E3/57T?
All SMCJ22-E3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22-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 SMCJ22-E3/57T part is unused and in its original packaging.
Return procedure for SMCJ22-E3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22-E3/57T Tags
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