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Vishay General Semiconductor - Diodes Division SMCJ22A-E3/9AT
- Part No.:
- SMCJ22A-E3/9AT
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22A-E3/9AT.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,355
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Product details
Overview
SMCJ22A-E3/9AT from Vishay General Semiconductor is a unidirectional surface-mount Transient Voltage Suppressor (TVS) diode in SMC (DO-214AB) package, designed for clamping voltage transients up to 1500 W peak pulse power with 35.5 V clamping voltage at 42.3 A surge current. It features 24.4–26.9 V breakdown voltage at 1 mA test current, 22 V stand-off voltage, and 1.0 μA max reverse leakage at VWM - used for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power rails.
For engineers reviewing the SMCJ22A-E3/9AT datasheet, SMCJ22A-E3/9AT pinout, SMCJ22A-E3/9AT application, or SMCJ22A-E3/9AT equivalent, key selection criteria include unidirectional polarity, 1500 W 10/1000 μs surge rating, 35.5 V clamping performance, RoHS-compliant matte tin plating, and compatibility with automated SMT placement on 8.0 mm × 8.0 mm copper pads.
Technical Context
The SMCJ22A-E3/9AT operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to suppress ESD and inductive switching transients. Its thermal resistance is 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation up to 150 °C junction temperature.
It meets MSL level 1 per J-STD-020, supports peak forward surge current of 200 A (8.3 ms half-sine), and is rated for -55 °C to +150 °C operating/storage range. The cathode band identifies polarity; no marking is used for bidirectional variants - but SMCJ22A-E3/9AT is explicitly unidirectional.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR min/max | 24.4 V / 26.9 V at 1 mA - defines minimum guaranteed avalanche initiation threshold under standardized test conditions |
| VWM | 22 V - maximum continuous reverse operating voltage before significant leakage begins |
| VC @ IPPM | 35.5 V at 42.3 A - clamping voltage during 10/1000 μs transient, limiting downstream circuit stress |
| PPPM | 1500 W - peak pulse power handling capability under standard 10/1000 μs waveform |
| IPPM | 42.3 A - corresponding peak pulse current at which VC = 35.5 V |
| TJ max | +150 °C - maximum allowable junction temperature for sustained reliability |
| RθJA | 75 °C/W - thermal resistance determining temperature rise under power dissipation |
Pinout & Package
Package: SMC (DO-214AB), surface-mount, low-profile case with matte tin-plated leads solderable per J-STD-002 and JESD 22-B102. Cathode identified by band marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to system ground or lower-potential rail during transient suppression |
| Cathode | Current exit terminal in forward bias; marked with band | Connected to protected line (e.g., 24 V supply rail); conducts during overvoltage events |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power rating | Enables robust protection against high-energy transients like ISO 7637-2 Load Dump without derating at TA ≤ 25 °C |
| Glass passivated chip junction | Ensures stable avalanche characteristics and long-term reliability under repeated surge stress |
| MSL Level 1 moisture sensitivity | Allows unlimited floor life and reflow compatibility without dry-pack requirements |
| RoHS-compliant, commercial grade | Meets environmental compliance for global industrial and consumer electronics manufacturing |
| Low incremental surge resistance | Minimizes voltage overshoot during fast-rising transients (e.g., EFT bursts) |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: Suppressing load dump and jump-start transients on 24 V battery-fed ECUs and body control modules. IC Role / Device Role / Timing Role: Unidirectional TVS placed between 24 V rail and chassis ground to clamp surges above 35.5 V. Use Value: Limits voltage seen by downstream DC-DC converters and microcontrollers to safe levels during ISO 16750-2 pulses. |
Use Scenario: Protecting analog outputs of pressure/temperature sensors connected to PLC I/O modules. IC Role / Device Role / Timing Role: TVS shunt device on 4–20 mA or 0–10 V signal path to absorb induced lightning surges. Use Value: Prevents latch-up or damage to precision op-amps and ADC inputs while maintaining signal integrity below 22 V normal operation. |
| Motor Drive Gate Driver Protection | Power Supply Input Stage Clamping |
|
Use Scenario: Safeguarding high-side and low-side gate drivers in BLDC inverters from shoot-through-induced voltage spikes. IC Role / Device Role / Timing Role: Fast-response unidirectional clamp across driver supply pins (VDD-GND). Use Value: Maintains gate drive integrity by limiting VDD excursions to ≤35.5 V during MOSFET switching noise coupling. |
Use Scenario: Front-end clamping on AC-DC or DC-DC converter inputs exposed to line surges and EFT. IC Role / Device Role / Timing Role: Primary transient suppressor before input filter capacitor and rectifier stage. Use Value: Absorbs 1500 W surges without degradation, reducing need for upstream MOVs or gas discharge tubes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC22A-TB | Same 22 V VWM, but 1000 W PPPM and higher VC (38.9 V); SOD-123FL package | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load dump | Select only when board space constraints prohibit SMC package and surge energy is <1000 W |
| 1.5KE22A | Through-hole DO-201 package; identical VBR/VC specs but 1500 W rating requires larger PCB footprint | Not compatible with automated SMT assembly; higher thermal resistance (RθJA ≈ 100 °C/W) | Choose only for legacy through-hole designs or where reflow compatibility is not required |
Compared with SAC22A-TB and 1.5KE22A, the SMCJ22A-E3/9AT delivers full 1500 W surge capability in an SMT-optimized SMC package with superior thermal performance (RθJA = 75 °C/W) and AEC-Q101 qualification readiness - making it the preferred choice for new automotive and industrial SMT designs requiring high-reliability transient suppression.
Availability
SMCJ22A-E3/9AT is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface circuits, motor drive gate driver stages, and power supply input clamping requiring stable component supply and RoHS-compliant sourcing.
Supply support for SMCJ22A-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, MOSFETs, and protection devices with emphasis on reliability, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom systems where robustness against load dump, ESD, and inductive switching is critical.
FAQ
What is the clamping voltage of the SMCJ22A-E3/9AT under maximum surge conditions?
The SMCJ22A-E3/9AT has a maximum clamping voltage (VC) of 35.5 V at its rated peak pulse current (IPPM) of 42.3 A, measured using the standard 10/1000 μs double-exponential waveform. This value ensures downstream components see limited overvoltage during transient events, and it is verified per ANSI/IEEE C62.35 standards. The SMCJ22A-E3/9AT maintains this clamping performance across its specified operating temperature range.
Is the SMCJ22A-E3/9AT suitable for automotive applications?
Yes - the SMCJ22A-E3/9AT is RoHS-compliant and built on Vishay's AEC-Q101-qualified platform (with HE3/HM3 variants available). While the base SMCJ22A-E3/9AT is commercial-grade, its construction - including glass-passivated junction, MSL Level 1 rating, and -55 °C to +150 °C operating range - meets core automotive environmental requirements. For certified AEC-Q101 use, specify SMCJ22AHE3_X; the SMCJ22A-E3/9AT itself serves as a direct drop-in for prototyping and non-qualified production tiers.
What does the "E3/9AT" suffix indicate in SMCJ22A-E3/9AT?
The "E3" suffix denotes RoHS-compliant, commercial-grade construction with matte tin-plated leads; "9AT" specifies packaging in 13-inch diameter plastic tape and reel, with 3500 units per reel. This format supports high-speed pick-and-place assembly and complies with J-STD-002 solderability standards. The SMCJ22A-E3/9AT is distinct from M3 (halogen-free) or HE3 (AEC-Q101 qualified) variants - all sharing identical electrical specs but differing in material compliance and qualification status.
How does the SMCJ22A-E3/9AT compare to bidirectional TVS diodes like SMCJ22CA?
The SMCJ22A-E3/9AT is unidirectional and intended for DC line protection where polarity is fixed (e.g., 24 V supply to ground), offering lower leakage (<1.0 μA at 22 V) and tighter VBR tolerance. In contrast, SMCJ22CA is bidirectional, suited for AC or floating signal lines, but exhibits doubled ID limit for VWM ≤10 V - irrelevant here. For 22 V DC rails, the SMCJ22A-E3/9AT provides superior leakage control and matches the same 35.5 V clamping performance as its CA counterpart under single-polarity surges.
What PCB layout guidance applies to the SMCJ22A-E3/9AT for optimal thermal and surge performance?
For optimal performance, mount the SMCJ22A-E3/9AT on minimum 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal, as specified in Vishay's datasheet Figure 2 derating curves. Avoid narrow traces between the device and ground/power planes; use short, wide copper pours to minimize inductance and reduce VC overshoot. Thermal relief should be minimized to maintain RθJL = 15 °C/W. The SMCJ22A-E3/9AT achieves full 1500 W rating only under these validated pad conditions.
SMCJ22A-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:
- 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-E3/9AT FAQ
1.How can I place an order for SMCJ22A-E3/9AT through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22A-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 SMCJ22A-E3/9AT reliable?
The price and inventory of SMCJ22A-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 SMCJ22A-E3/9AT is usually 5 days.
3.What payment methods are accepted for SMCJ22A-E3/9AT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22A-E3/9AT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22A-E3/9AT?
SMCJ22A-E3/9AT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22A-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 SMCJ22A-E3/9AT?
For technical support, including SMCJ22A-E3/9AT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22A-E3/9AT requirements.
6.How does Aetrix verify that SMCJ22A-E3/9AT is sourced from the original manufacturer or authorized distributors?
All SMCJ22A-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 SMCJ22A-E3/9AT meets industry standards.
7.What is the process for return or replacement of SMCJ22A-E3/9AT?
All SMCJ22A-E3/9AT units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22A-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 SMCJ22A-E3/9AT part is unused and in its original packaging.
Return procedure for SMCJ22A-E3/9AT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22A-E3/9AT Tags
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