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Vishay General Semiconductor - Diodes Division SMCJ22CA-E3/9AT
- Part No.:
- SMCJ22CA-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CA-E3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:6,985
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Product details
Overview
SMCJ22CA-E3/9AT from Vishay General Semiconductor is a bidirectional transient voltage suppressor (TVS) diode in SMC (DO-214AB) package, designed for high-energy surge protection on power and signal lines. It features 22 V standoff voltage (VWM), 35.5 V clamping voltage (VC) at 42.3 A peak pulse current (IPPM), and 1500 W peak pulse power (10/1000 μs waveform), commonly deployed in automotive power rail and industrial sensor interface protection.
For engineers reviewing the SMCJ22CA-E3/9AT datasheet, SMCJ22CA-E3/9AT pinout, SMCJ22CA-E3/9AT application, or SMCJ22CA-E3/9AT equivalent, key selection criteria include bidirectional clamping symmetry, low clamping ratio (VC/VWM = 1.61), AEC-Q101 qualification eligibility, RoHS-compliant matte tin terminations, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22CA-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering symmetrical clamping in both polarities due to its bidirectional construction. Its breakdown voltage (VBR) is specified at 24.4–26.9 V (min/max) with 1 mA test current, and it maintains stable thermal performance up to 150 °C junction temperature.
It exhibits very fast response time (<1 ps), low incremental surge resistance, and meets MSL level 1 per J-STD-020 with peak reflow temperature of 260 °C. The device is rated for non-repetitive surge events only and requires derating above 25 °C ambient per Figure 2 in the datasheet.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM (Standoff Voltage) | 22 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR (Breakdown Voltage) | 24.4–26.9 V at 1 mA - Confirmed avalanche initiation range under DC test conditions |
| VC (Clamping Voltage) | 35.5 V at 42.3 A (10/1000 μs) - Peak voltage seen by protected circuit during worst-case surge |
| PPPM (Peak Pulse Power) | 1500 W - Energy-handling capability for standardized 10/1000 μs transient waveform |
| IPPM (Peak Pulse Current) | 42.3 A - Maximum surge current the device safely clamps without failure |
| TJmax | 150 °C - Absolute maximum junction temperature for reliable long-term operation |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm body and 2.06 mm height |
Pinout & Package
SMCJ22CA-E3/9AT uses the SMC (DO-214AB) package: a surface-mount, bidirectional TVS diode with no polarity marking (unlike unidirectional variants). The two terminals are electrically symmetric and function as interchangeable anode/cathode pairs depending on transient polarity.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Terminal 1 | Anode/Cathode (bidirectional) | Either terminal serves as conduction path during positive or negative transients; no fixed polarity |
| Terminal 2 | Anode/Cathode (bidirectional) | Electrically identical to Terminal 1; forms symmetrical clamping pair across protected line |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| MSL Level 1 rating | Enables standard SMT reflow without moisture sensitivity concerns (peak 260 °C) |
| RoHS-compliant matte tin plating | Guarantees solderability per J-STD-002 and JESD 22-B102, with whisker resistance Class 2 |
| Low clamping ratio (VC/VWM) | 1.61 - Minimizes overvoltage exposure to downstream ICs during clamping events |
| 1500 W peak pulse power | Supports robust protection against ISO 7637-2 Pulse 1/2a/5a and IEC 61000-4-5 surges in automotive systems |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface |
|---|---|
Use Scenario: Protecting 24 V supply lines in engine control units (ECUs) and body control modules (BCMs) against load dump and inductive switching transients. IC Role / Device Role / Timing Role: Bidirectional clamping element placed between power rail and ground to shunt surge energy away from voltage regulators and microcontrollers. Use Value: Limits transient voltage to ≤35.5 V, preventing latch-up or permanent damage to 3.3 V/5 V logic powered from buck converters. | Use Scenario: Safeguarding analog input channels of PLC analog I/O modules connected to 4–20 mA current loops exposed to field wiring ESD and lightning-induced surges. IC Role / Device Role / Timing Role: Low-capacitance (typ. <100 pF) TVS placed differential across signal and return lines upstream of instrumentation amplifier inputs. Use Value: Clamps common-mode transients without distorting low-frequency analog signals, preserving measurement accuracy below 1 kHz. |
| Telecom Line Interface | Consumer Appliance Motor Control |
Use Scenario: Protecting Ethernet PHY interfaces and PoE injectors against ESD (IEC 61000-4-2) and surge (IEC 61000-4-5) on RJ45 ports in network switches and base stations. IC Role / Device Role / Timing Role: Bidirectional TVS array component used in conjunction with common-mode chokes and GDTs for multi-stage telecom surge protection. Use Value: Responds within picoseconds to clamp ±15 kV contact ESD events while maintaining signal integrity up to 100 MHz. | Use Scenario: Shielding MCU GPIOs and gate drivers in washing machine motor inverters from commutation spikes generated by BLDC motor back-EMF. IC Role / Device Role / Timing Role: Secondary-level TVS mounted directly at motor driver IC pins to absorb localized inductive kickback not filtered by bulk capacitors. Use Value: Withstands repetitive 42.3 A pulses without degradation, extending gate driver lifetime in high-cycle appliance applications. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ22CA-E3/52T | Lower PPPM (600 W), smaller SMB (DO-214AA) package, same VWM/VC specs | Reduced surge margin; suitable only for lower-energy environments (e.g., consumer USB ports) | Select when board space is constrained and surge threat level is limited to IEC 61000-4-2 ±8 kV |
| 1.5KE22CA | Through-hole DO-201 package, higher VC (36.5 V), same PPPM (1500 W), no MSL rating | Not compatible with automated SMT assembly; requires wave soldering or hand-soldering | Choose for legacy through-hole designs or prototyping where reflow compatibility is unnecessary |
Compared with SMCJ22CA-E3/9AT, SMBJ22CA-E3/52T trades surge capacity for footprint reduction, while 1.5KE22CA retains full power rating but sacrifices SMT manufacturability and moisture sensitivity compliance - making SMCJ22CA-E3/9AT optimal for high-volume automotive and industrial SMT production.
Availability
SMCJ22CA-E3/9AT is available at Aetrix Electronics and suitable for automotive electronics, industrial sensor interfaces, telecom infrastructure, and consumer appliance designs requiring stable component supply and AEC-Q101-qualified surge protection.
Supply support for SMCJ22CA-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, MOSFETs, optoelectronics, and passive components with emphasis on reliability and application-specific performance.
The SMCJ series is part of Vishay's TRANSZORB® TVS platform, engineered specifically for high-power, surface-mount transient suppression in harsh environments including automotive, industrial, and telecom systems.
FAQ
What does the "CA" suffix indicate in SMCJ22CA-E3/9AT?
The "CA" suffix denotes a bidirectional configuration, meaning the SMCJ22CA-E3/9AT provides symmetrical clamping for both positive and negative voltage transients. Unlike unidirectional variants (e.g., SMCJ22A), it has no cathode band marking and functions identically regardless of polarity applied across its terminals - critical for protecting AC-coupled or floating signal lines.
Is SMCJ22CA-E3/9AT AEC-Q101 qualified?
The base SMCJ22CA-E3/9AT is RoHS-compliant and commercial-grade; however, Vishay offers AEC-Q101-qualified versions under automotive ordering codes such as SMCJ22CAHE3_X (where "_X" is revision code). For automotive production use, specify the HE3 or HM3 suffix variant - the SMCJ22CA-E3/9AT itself is not automatically qualified unless explicitly ordered with HE3/HM3.
What is the clamping voltage of SMCJ22CA-E3/9AT at its rated peak pulse current?
The SMCJ22CA-E3/9AT has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated 10/1000 μs peak pulse current of 42.3 A. This value is measured per ANSI/IEEE C62.35 standards and represents the upper voltage limit imposed on the protected circuit during worst-case surge events - a key parameter for ensuring downstream ICs remain within absolute maximum ratings.
Can SMCJ22CA-E3/9AT be used in place of a unidirectional TVS like SMCJ22A?
No - SMCJ22CA-E3/9AT is bidirectional and lacks polarity marking, whereas SMCJ22A is unidirectional with a cathode band. Substituting them requires verifying circuit topology: SMCJ22CA-E3/9AT is appropriate for AC, differential, or floating lines; SMCJ22A suits DC rails where polarity is fixed. Using SMCJ22CA-E3/9AT in a unidirectional design may increase leakage or reduce efficiency due to dual-junction conduction paths.
What PCB pad layout is recommended for optimal thermal and surge performance of SMCJ22CA-E3/9AT?
Vishay specifies mounting SMCJ22CA-E3/9AT on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal to achieve rated 1500 W pulse power. Smaller pads cause thermal derating and reduced surge capability. The SMC (DO-214AB) outline drawing confirms 2.06 mm terminal width and 3.20 mm minimum standoff - ensure stencil aperture and solder mask clearance match these dimensions to prevent bridging or insufficient wetting.
SMCJ22CA-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:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- 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)
SMCJ22CA-E3/9AT FAQ
1.How can I place an order for SMCJ22CA-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CA-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 SMCJ22CA-E3/9AT reliable?
The price and inventory of SMCJ22CA-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 SMCJ22CA-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ22CA-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CA-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CA-E3/9AT?
SMCJ22CA-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CA-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 SMCJ22CA-E3/9AT?
For technical support, including SMCJ22CA-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CA-E3/9AT requirements.
6.How does Aetrix verify that SMCJ22CA-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ22CA-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 SMCJ22CA-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ22CA-E3/9AT?
All SMCJ22CA-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CA-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 SMCJ22CA-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ22CA-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CA-E3/9AT Tags
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