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Vishay General Semiconductor - Diodes Division SMCJ22-E3/9AT
- Part No.:
- SMCJ22-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22-E3/9AT.pdf
- Description:
- TVS DIODE 22VWM 39.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:4,023
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Product details
Overview
SMCJ22-E3/9AT from Vishay General Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-214AB (SMCJ) package, designed for robust overvoltage protection of sensitive electronics. It features a 22 V stand-off voltage (VWM), 24.4–26.9 V breakdown voltage (VBR) at 1 mA, 35.5 V clamping voltage (VC) at 42.3 A peak pulse current, and 1500 W peak pulse power rating with 10/1000 µs waveform - used to safeguard MOSFETs, ICs, and sensor signal lines in automotive and industrial power supplies.
For engineers reviewing the SMCJ22-E3/9AT datasheet, SMCJ22-E3/9AT pinout, SMCJ22-E3/9AT application, or SMCJ22-E3/9AT equivalent, key selection criteria include unidirectional polarity, AEC-Q101 qualification, RoHS-compliant matte tin plating, MSL Level 1 moisture sensitivity, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ps) and low incremental surge resistance to clamp transients induced by inductive load switching or ESD events. Its unidirectional configuration provides forward conduction capability (VF = 3.5 V at 100 A) and reverse-biased clamping above VWM.
Thermal performance is defined by RθJA = 75 °C/W (junction-to-ambient, on recommended pad layout) and RθJL = 15 °C/W (junction-to-lead), enabling reliable operation up to TJ = 150 °C. The device meets UL 497B recognition (QVGQ2) and complies with ANSI/IEEE C62.35 surge standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 24.4 V / 26.9 V at 1 mA - ensures consistent avalanche turn-on across production lot |
| VC @ IPPM | 35.5 V at 42.3 A - limits downstream voltage stress during 10/1000 µs surge |
| PPPM | 1500 W - sustains high-energy transients without failure under standardized waveform |
| IFSM | 200 A - withstands 8.3 ms half-sine surge, critical for motor drive and relay coil suppression |
| TJ range | –55 °C to +150 °C - supports under-hood automotive and industrial ambient conditions |
| Moisture Sensitivity | MSL Level 1 (per J-STD-020) - allows unlimited floor life before reflow |
Pinout & Package
Package: DO-214AB (SMCJ), surface-mount, low-profile case with cathode band marking on one end. Matte tin-plated leads meet J-STD-002 and JESD 22-B102 solderability requirements. E3 suffix indicates JESD 201 Class 1A whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction path | Connects to system ground or low-side return in unidirectional protection topology |
| Cathode (banded end) | Reverse-biased clamping node | Connects to protected line (e.g., 24 V rail or sensor input); conducts when Vin exceeds VWM |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling |
| AEC-Q101 qualification | Validated for automotive-grade stress testing including HTOL, TC, and ESD HBM/MM |
| UL 497B recognition (QVGQ2) | Confirms compliance for telecom and industrial surge protector classification |
| Low Rsurge | Minimizes VC overshoot during fast-rising transients, improving system-level immunity |
| RoHS-compliant & halogen-free | Meets JEDEC JS709A and EU Directive 2011/65/EU environmental requirements |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between battery feed and DC-DC input to clamp surges up to ISO 7637-2 Pulse 5a. Use Value: Withstands 200 A IFSM and clamps to ≤35.5 V, preventing damage to downstream regulators and microcontrollers. | Use Scenario: Shielding analog inputs of temperature/pressure sensors in PLC I/O modules from field-wiring transients. IC Role / Device Role / Timing Role: Connected anode-to-ground, cathode-to-signal line to suppress ±1 kV EFT (IEC 61000-4-4) and lightning-induced surges. Use Value: 1500 W PPPM and fast response ensure signal integrity remains intact during repetitive 10/1000 µs threats. |
| Telecom Line Card Surge Suppression | Consumer Appliance Motor Drive Protection |
Use Scenario: Safeguarding Ethernet PHY power pins and data lines in outdoor base station equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Used in conjunction with common-mode chokes and GDTs in multi-stage protection circuits per ITU-T K.21. Use Value: UL 497B recognition and bi-directional-capable family variants enable certified front-end protection architecture. | Use Scenario: Clamping back-EMF spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, washing machines). IC Role / Device Role / Timing Role: Mounted across motor terminals with cathode to positive rail to absorb inductive kickback during PWM switching. Use Value: 200 A IFSM rating handles repeated commutation surges without degradation, extending system lifetime. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A-E3/61T | Lower PPPM (400 W), smaller DO-214AC (SMA) package, same VWM/VC ratings | Suitable only for lower-energy transients; not rated for AEC-Q101 or UL 497B | Select when board space is constrained and surge energy does not exceed 400 W. |
| SMCJ22AHE3/9AT | Identical electrical specs but AEC-Q101 qualified version with HE3 suffix (JESD 201 Class 2 whisker test) | Required for automotive safety-critical modules where enhanced whisker resistance is mandated | Choose for Tier-1 automotive designs requiring full AEC-Q101 traceability and extended reliability validation. |
Compared with SMCJ22-E3/9AT, SMAJ22A-E3/61T offers footprint reduction at the cost of surge handling and certification coverage, while SMCJ22AHE3/9AT delivers identical protection performance with higher process reliability assurance for mission-critical automotive use.
Availability
SMCJ22-E3/9AT is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge suppression, and consumer appliance motor drive protection requiring stable component supply and full RoHS compliance.
Supply support for SMCJ22-E3/9AT 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, TVS devices, and optoelectronics with emphasis on reliability, precision, and application-specific optimization.
The SMCJ series belongs to Vishay's TRANSZORB® transient voltage suppressor product line, engineered specifically for high-power, high-reliability overvoltage protection in harsh environments including automotive, industrial, and telecom infrastructure.
FAQ
What is the clamping voltage of the SMCJ22-E3/9AT under maximum rated surge current?
The SMCJ22-E3/9AT has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 42.3 A using a 10/1000 µs waveform. This value is measured per ANSI/IEEE C62.35 and ensures predictable voltage limiting during surge events. The SMCJ22-E3/9AT maintains this clamping performance across its specified operating temperature range and is validated for repeatable behavior in production lots.
Is the SMCJ22-E3/9AT suitable for automotive applications?
Yes, the SMCJ22-E3/9AT is RoHS-compliant and meets MSL Level 1 per J-STD-020, but it is not AEC-Q101 qualified. For automotive use, Vishay offers the SMCJ22AHE3/9AT variant - identical in all electrical parameters but fully AEC-Q101 qualified and tested to JESD 201 Class 2 whisker resistance. The SMCJ22-E3/9AT remains appropriate for non-safety-critical automotive subsystems where commercial-grade qualification suffices.
What does the "E3/9AT" suffix indicate in SMCJ22-E3/9AT?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads meeting JESD 201 Class 1A whisker resistance. The "9AT" refers to the packaging format: 13-inch diameter plastic tape and reel, containing 3500 units per reel. This configuration supports high-volume automated SMT assembly and is documented in Vishay's ordering information table for the SMCJ family.
How does the SMCJ22-E3/9AT differ from bi-directional SMCJ22CA variants?
The SMCJ22-E3/9AT is unidirectional, meaning it conducts in forward bias (anode-to-cathode) and clamps in reverse bias above VWM; it features a visible cathode band. In contrast, SMCJ22CA devices are bi-directional, with symmetrical clamping in both polarities and no polarity marking. The SMCJ22-E3/9AT supports applications requiring forward conduction (e.g., DC power rail protection), while SMCJ22CA suits AC line or differential signal protection where polarity reversal occurs.
What PCB layout guidance applies to the SMCJ22-E3/9AT for optimal thermal and surge performance?
Vishay specifies mounting the SMCJ22-E3/9AT on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated PPPM and thermal resistance (RθJA = 75 °C/W). Minimizing trace inductance between the device and protected node is critical - short, wide traces reduce VC overshoot during fast transients. The SMCJ22-E3/9AT must be placed as close as possible to the connector or IC input it protects, with ground plane continuity beneath the pads to enhance heat dissipation.
SMCJ22-E3/9AT 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-E3/9AT FAQ
1.How can I place an order for SMCJ22-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22-E3/9AT 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-E3/9AT reliable?
The price and inventory of SMCJ22-E3/9AT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ22-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22-E3/9AT?
SMCJ22-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22-E3/9AT 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-E3/9AT?
For technical support, including SMCJ22-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22-E3/9AT requirements.
6.How does Aetrix verify that SMCJ22-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ22-E3/9AT 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-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ22-E3/9AT?
All SMCJ22-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22-E3/9AT, 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-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ22-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22-E3/9AT Tags
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