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Vishay General Semiconductor - Diodes Division SMCJ22CA-M3/57T
- Part No.:
- SMCJ22CA-M3/57T
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CA-M3/57T.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,729
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Product details
Overview
SMCJ22CA-M3/57T from Vishay General Semiconductor is a bidirectional 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 a 10/1000 μs waveform. It features a standoff voltage of 22 V, breakdown voltage range of 24.4 V to 26.9 V at 1 mA test current, and clamps to ≤35.5 V at 42.3 A peak pulse current. Used for protecting MOSFETs, ICs, and sensor signal lines in automotive and industrial power electronics.
For engineers reviewing the SMCJ22CA-M3/57T datasheet, SMCJ22CA-M3/57T pinout, SMCJ22CA-M3/57T application, or SMCJ22CA-M3/57T equivalent, this page delivers verified electrical specs, thermal resistance (RθJA = 75 °C/W), polarity behavior, AEC-Q101 qualification status, and real-world design implications for transient suppression in 24 V systems.
Technical Context
The SMCJ22CA-M3/57T operates as a bidirectional avalanche diode, symmetrically clamping both positive and negative transients without polarity marking. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance, enabling fast response time (<1 ns) to ESD and lightning-induced surges.
Designed for mounting on 8.0 mm × 8.0 mm copper pads per terminal, it delivers 1500 W peak pulse power under standardized 10/1000 μs waveform conditions and supports continuous operation from −55 °C to +150 °C junction temperature, with derating above 25 °C ambient per Fig. 2.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum reverse working voltage before leakage exceeds 1 μA; defines safe operating margin below clamping threshold. |
| VBR min/max | 24.4 V / 26.9 V at IT = 1 mA - Confirmed breakdown range ensures reliable turn-on during overvoltage events. |
| VC @ IPPM | ≤35.5 V at 42.3 A - Clamping voltage limits stress on downstream components during 1500 W transient. |
| PPPM | 1500 W - Peak pulse power rating with 10/1000 μs waveform; validates robustness against IEC 61000-4-5 Level 4 surges. |
| RθJA | 75 °C/W - Junction-to-ambient thermal resistance; requires minimum 8 mm × 8 mm copper pad per lead for rated power dissipation. |
| TJ max | +150 °C - Maximum junction temperature; enables use in under-hood automotive environments with proper layout. |
| Package | SMC (DO-214AB) - Surface-mount outline with 7.75 mm × 6.22 mm body; compatible with automated pick-and-place. |
Pinout & Package
SMCJ22CA-M3/57T uses the SMC (DO-214AB) package: a surface-mount, bidirectional device with no polarity marking. Terminals are matte tin-plated leads solderable per J-STD-002 and JESD 22-B102, meeting JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Transient return path (bidirectional) | Acts as cathode during positive transients and anode during negative transients; symmetrical conduction. |
| Cathode | Transient return path (bidirectional) | Identical role to Anode; no functional distinction in CA-type devices - both terminals behave identically. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC-coupled or floating signal lines without polarity concerns. |
| 1500 W peak pulse power | Withstands IEC 61000-4-5 4 kV surge (line-to-earth) without degradation when mounted per spec. |
| Low Rsurge | Minimizes voltage overshoot during fast transients by limiting dynamic impedance rise under high di/dt. |
| AEC-Q101 qualified option | M3 suffix indicates halogen-free, RoHS-compliant construction; HE3/HM3 variants available for automotive-grade reliability. |
| MSL Level 1 | Unlimited floor life at ≤30 °C/60 % RH; supports standard reflow without baking prior to assembly. |
Applications
| Automotive Power Distribution | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: Protecting 24 V supply rails in body control modules against load dump and alternator transients. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed across input rail to limit voltage excursions to ≤35.5 V during 120 V/400 ms load dump events. Use Value: Prevents latch-up or destruction of downstream DC-DC converters and microcontrollers without adding series impedance. | Use Scenario: Shielding analog output lines (e.g., 4–20 mA current loop) from ESD and inductive switching noise in factory automation. IC Role / Device Role / Timing Role: Low-capacitance (<50 pF) bidirectional clamp shunting transients between signal and ground before reaching precision DAC or op-amp inputs. Use Value: Maintains signal integrity while surviving ±8 kV contact ESD per IEC 61000-4-2 without affecting loop accuracy. |
| Telecom Line Card Surge Protection | Consumer Appliance Motor Drive Inputs |
Use Scenario: Safeguarding Ethernet PHY power pins and bias networks in outdoor telecom equipment exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Primary-level TVS placed at board edge to absorb >1 kV differential-mode surges before they propagate into isolation transformers or magnetics. Use Value: Reduces need for secondary-stage protection, lowering BOM cost and PCB area versus multi-stage designs. | Use Scenario: Suppressing commutation spikes from brushed DC motors in smart home appliances (e.g., vacuum cleaners, power tools). IC Role / Device Role / Timing Role: Mounted directly across motor terminals to clamp flyback voltages exceeding 22 V standby level during PWM switching. Use Value: Eliminates arcing at switches and extends brush life by limiting peak voltage to 35.5 V regardless of motor inductance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22CA-E3/57T | Lower PPPM (400 W), smaller SMA package (DO-214AC), higher RθJA (110 °C/W) | Suitable only for lower-energy transients; not recommended for load dump or IEC 61000-4-5 compliance. | Select when space-constrained and surge energy <200 mJ; verify thermal margin with reduced copper area. |
| SMCJ22A-M3/57T | Unidirectional variant; includes cathode band marking; identical VWM, VBR, VC, and PPPM ratings | Requires correct polarity placement; unsuitable for AC or floating nodes where bidirectional clamping is mandatory. | Choose only if circuit topology guarantees unidirectional transients and polarity alignment is assured. |
Compared with SMAJ22CA-E3/57T and SMCJ22A-M3/57T, the SMCJ22CA-M3/57T uniquely delivers 1500 W bidirectional clamping in SMC package with validated automotive-grade M3 construction - making it the only choice for robust 24 V system protection where polarity independence and high-energy handling are non-negotiable.
Availability
SMCJ22CA-M3/57T is available at Aetrix Electronics and suitable for automotive power distribution, industrial sensor interface protection, telecom line card surge protection, and consumer appliance motor drive inputs requiring stable component supply and halogen-free compliance.
Supply support for SMCJ22CA-M3/57T 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, efficiency, and application-specific optimization.
The SMCJ series is engineered for high-energy transient suppression in harsh environments - targeting automotive, industrial, and telecom applications where failure due to voltage surges must be eliminated through proven clamping performance and rugged packaging.
FAQ
What does the "CA" suffix mean in SMCJ22CA-M3/57T?
The "CA" suffix in SMCJ22CA-M3/57T denotes a bidirectional Transient Voltage Suppressor. Unlike unidirectional variants (e.g., SMCJ22A), the CA version clamps voltage transients equally in both polarities without requiring polarity orientation during PCB layout. This makes SMCJ22CA-M3/57T ideal for protecting AC-coupled signals, floating grounds, or differential buses where transient direction is unpredictable.
Is SMCJ22CA-M3/57T AEC-Q101 qualified?
The SMCJ22CA-M3/57T is halogen-free and RoHS-compliant per Vishay's M3 suffix definition, but it is not AEC-Q101 qualified. For automotive-grade qualification, select the HM3 variant (e.g., SMCJ22CAHM3_A/H), which carries full AEC-Q101 certification and is explicitly listed in Vishay's qualified parts list. The M3 suffix alone confirms material compliance, not automotive reliability testing.
What is the maximum clamping voltage of SMCJ22CA-M3/57T at its rated peak pulse current?
The maximum clamping voltage (VC) of SMCJ22CA-M3/57T is 35.5 V at its rated peak pulse current (IPPM) of 42.3 A, measured under standardized 10/1000 μs waveform conditions. This value is guaranteed per Vishay's datasheet (Document Number: 88394, Rev. 09-Jan-2024) and defines the upper voltage limit imposed on protected circuitry during worst-case surge events.
Can SMCJ22CA-M3/57T replace SMCJ22A-M3/57T in an existing design?
SMCJ22CA-M3/57T can replace SMCJ22A-M3/57T only if the circuit requires bidirectional clamping and has no polarity constraints. Since SMCJ22A-M3/57T is unidirectional (with cathode band), substituting the CA version removes polarity dependency but introduces symmetrical conduction - which may affect leakage paths in DC-biased circuits. Review bias network integrity before replacement, especially in precision analog or low-leakage applications.
What is the thermal resistance and recommended pad layout for SMCJ22CA-M3/57T?
The SMCJ22CA-M3/57T has a typical junction-to-ambient thermal resistance (RθJA) of 75 °C/W when mounted on 0.31" × 0.31" (8.0 mm × 8.0 mm) copper pads per terminal. To achieve rated 1500 W pulse power, each pad must meet this minimum size and be connected to internal ground/power planes via ≥2 thermal vias. Reduced pad area increases RθJA and risks thermal runaway during repeated surges.
SMCJ22CA-M3/57T 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:
- -
- 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 (SMC)
SMCJ22CA-M3/57T FAQ
1.How can I place an order for SMCJ22CA-M3/57T through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CA-M3/57T 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 SMCJ22CA-M3/57T reliable?
The price and inventory of SMCJ22CA-M3/57T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CA-M3/57T is usually 5 days.
3.What payment methods are accepted for SMCJ22CA-M3/57T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CA-M3/57T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CA-M3/57T?
SMCJ22CA-M3/57T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CA-M3/57T 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 SMCJ22CA-M3/57T?
For technical support, including SMCJ22CA-M3/57T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CA-M3/57T requirements.
6.How does Aetrix verify that SMCJ22CA-M3/57T is sourced from the original manufacturer or authorized distributors?
All SMCJ22CA-M3/57T 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 SMCJ22CA-M3/57T meets industry standards.
7.What is the process for return or replacement of SMCJ22CA-M3/57T?
All SMCJ22CA-M3/57T units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CA-M3/57T, 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 SMCJ22CA-M3/57T part is unused and in its original packaging.
Return procedure for SMCJ22CA-M3/57T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22CA-M3/57T Tags
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