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Taiwan Semiconductor Corporation SMCJ22CA
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- Part No.:
- SMCJ22CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CA.pdf
- Description:
- TVS DIODE 22VWM 35.5VC SMC
- Quantity:
- Payment:
- Shipping:
Inventory:1,912
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Product details
Overview
SMCJ22CA from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with 22V working stand-off voltage (VWM), 24.4–26.9V breakdown voltage (VBR), and 35.5V maximum clamping voltage (VC) at 44A peak pulse current-designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ22CA datasheet, SMCJ22CA pinout, SMCJ22CA application, or SMCJ22CA equivalent, key selection criteria include bidirectional clamping capability, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1ps response time, <1μA reverse leakage above 10V, and DO-214AB thermal performance (RθJA = 55°C/W).
Technical Context
The SMCJ22CA employs a glass-passivated silicon junction optimized for fast transient suppression, delivering symmetrical clamping in both polarities due to its CA (bidirectional) configuration. It meets ISO 7637-2 for automotive transients and supports unidirectional/bidirectional use without external polarity constraints.
Its 1500W peak pulse power rating (tp = 1ms) is derated linearly above 25°C ambient per Fig.2, with junction temperature range of –55°C to +150°C and moisture sensitivity level (MSL) 1 per J-STD-020-enabling reflow-compatible automated placement without baking.
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 @ IT = 1 mA - Ensures reliable turn-on margin above VWM under production tolerance |
| VC @ IPPM | 35.5 V @ 44 A - Clamped voltage during 10/1000μs surge limits downstream IC stress |
| PPK | 1500 W - Peak surge energy handling capacity per single 1ms pulse |
| IR @ VWM | <1 μA - Negligible standby leakage, critical for low-power battery-backed circuits |
| RθJA | 55 °C/W - Enables thermal design with ≤10.9°C rise at 5W steady-state dissipation |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, bidirectional, cathode band not applicable (symmetrical terminals). Matte tin-plated leads, UL 94V-0 molding compound, 0.210g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode | Bidirectional transient path | Identical electrical behavior in either direction; no polarity marking required for CA variant |
| Case | Thermal conduction path | DO-214AB body provides mechanical stability and heatsinking via PCB copper area |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/load dump), and Pulse 3a/3b (switching transients) in automotive ECUs |
| Sub-1ps response time | Clamps within 1.0 ps from 0 V to VBR min-faster than most microcontroller I/O propagation delays |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
| J-STD-020 MSL Level 1 | No floor life limitation or bake requirement-supports standard SMT reflow without moisture-related popcorning |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery line in engine control unit exposed to load-dump surges up to 40V for 400ms. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converter input. Use Value: Limits rail voltage to ≤35.5V during ISO 7637-2 Pulse 5a, preventing overvoltage shutdown or damage to LDOs and MCU power pins. | Use Scenario: 24V analog sensor signal line in factory automation PLC subjected to EFT bursts per IEC 61000-4-4. IC Role / Device Role / Timing Role: Bidirectional TVS shunting transients between signal and ground before op-amp input stage. Use Value: Maintains signal integrity by clamping ±35.5V spikes to safe levels while adding <0.5pF capacitance (per Fig.3), avoiding bandwidth degradation. |
| LED Driver Overvoltage Clamp | RS-485 Transceiver Bus Protection |
Use Scenario: Constant-current LED driver output in streetlight system experiencing inductive kickback from relay switching. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED string terminals. Use Value: Absorbs 1500W transient energy without failure, preserving LED forward voltage stability and enabling >100,000 surge cycles per JEDEC JESD22-A114. | Use Scenario: RS-485 differential bus lines (A/B) in building management system exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Bidirectional TVS pair (one per line to GND) meeting IEC 61000-4-5 Level 3 (1kV/2Ω) Use Value: Clamps common-mode transients to ≤35.5V while maintaining differential signaling integrity-no data corruption during 10/1000μs surges. |
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 (Bourns) | Same DO-214AA package, 600W PPK rating, higher RθJA (75°C/W), lower VC (37.5V @ 32.5A) | Limited to lower-energy transients; unsuitable for ISO 7637-2 Pulse 5a load-dump | Select SMCJ22CA when 1500W surge handling and automotive-grade thermal robustness are required. |
| 1.5KE22CA (ON Semiconductor) | Through-hole DO-15 package, same 22V VWM, but 1500W rating at 25°C only; no MSL1 or AEC-Q200 qualification | Not suitable for high-volume SMT production or automotive under-hood environments | Choose SMCJ22CA for surface-mount reliability, automated assembly, and extended temperature operation (–55°C to +150°C). |
Compared with SMBJ22CA and 1.5KE22CA, the SMCJ22CA delivers superior surge energy absorption in a moisture-insensitive SMT package, enabling direct replacement in automotive and industrial designs requiring ISO 7637-2 compliance and zero reflow risk.
Availability
SMCJ22CA is available at Aetrix Electronics and suitable for automotive power rail protection, industrial sensor interface hardening, LED driver overvoltage clamp, and RS-485 transceiver bus protection requiring stable component supply across extended temperature and high-reliability production cycles.
Supply support for SMCJ22CA 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
Taiwan Semiconductor Corporation (TSC) is a vertically integrated semiconductor manufacturer specializing in discrete power devices, TVS diodes, rectifiers, and MOSFETs for automotive, industrial, and consumer markets.
The SMCJ series was developed specifically for high-energy transient suppression in harsh environments-emphasizing ISO 7637-2 compliance, MSL Level 1 reliability, and DO-214AB thermal efficiency for under-hood and factory-floor applications.
FAQ
What is the clamping voltage of SMCJ22CA at its rated peak pulse current?
The SMCJ22CA has a maximum clamping voltage (VC) of 35.5 V at 44 A peak impulse current (IPPM), measured under the standardized 10/1000 μs double-exponential waveform per Fig.5. This value ensures downstream components see limited overvoltage during transient events, and is guaranteed across the full production lot per datasheet Table on page 2.
Is SMCJ22CA unidirectional or bidirectional, and how is polarity identified?
The SMCJ22CA is a bidirectional TVS diode, indicated by the "CA" suffix per TSC's ordering convention. Unlike unidirectional variants (e.g., SMCJ22A), it has no cathode band or polarity marking-both terminals behave identically, enabling symmetric clamping on AC lines or differential buses without orientation concerns.
Does SMCJ22CA meet automotive transient immunity standards?
Yes, the SMCJ22CA meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b-verified per TSC's test reports and referenced explicitly in the Features section. Its 1500W peak power rating and low clamping voltage make it suitable for 12V and 24V automotive power networks, including ECU, BCM, and ADAS module protection.
What is the thermal resistance and maximum junction temperature for SMCJ22CA?
The SMCJ22CA has a junction-to-ambient thermal resistance (RθJA) of 55°C/W and a maximum junction temperature (TJ) of +150°C. These values allow it to sustain 5W steady-state power dissipation with ≤10.9°C temperature rise above ambient-critical for thermally constrained PCB layouts in sealed enclosures.
Can SMCJ22CA be used in place of SMCJ22A in an existing design?
No-SMCJ22CA is bidirectional while SMCJ22A is unidirectional. Substituting SMCJ22CA for SMCJ22A may cause unintended conduction in DC-coupled circuits. The SMCJ22CA should only replace SMCJ22A if the application requires symmetrical clamping (e.g., AC lines, RS-485 buses) and board layout accommodates its non-polarized mounting.
SMCJ22CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- -
- 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:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ22CA FAQ
1.How can I place an order for SMCJ22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CA 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 reliable?
The price and inventory of SMCJ22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CA is usually 5 days.
3.What payment methods are accepted for SMCJ22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CA?
SMCJ22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CA 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?
For technical support, including SMCJ22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CA requirements.
6.How does Aetrix verify that SMCJ22CA is sourced from the original manufacturer or authorized distributors?
All SMCJ22CA 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 meets industry standards.
7.What is the process for return or replacement of SMCJ22CA?
All SMCJ22CA units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CA, 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 part is unused and in its original packaging.
Return procedure for SMCJ22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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