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Taiwan Semiconductor Corporation SMCJ22C
- Part No.:
- SMCJ22C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22C.pdf
- Description:
- 1500W, 27.1V, 10%, BIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,521
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Product details
Overview
SMCJ22C from Taiwan Semiconductor is a bidirectional 1500W surface-mount transient voltage suppressor (TVS) in DO-214AB (SMC) package, with 22V working stand-off voltage (VWM), 24.4–29.8V breakdown voltage (VBR), and 39.4V maximum clamping voltage (VC) at 39A peak impulse current - designed for automotive load-dump and ESD protection in power supply rails and I/O interfaces.
For engineers reviewing the SMCJ22C datasheet, SMCJ22C pinout, SMCJ22C application, or SMCJ22C equivalent, key selection criteria include bidirectional surge capability per ISO 7637-2 Pulse 1/2a/2b/3a/3b, sub-1ps response time, <1µA reverse leakage above 10V, and compatibility with automated SMT placement on industrial and automotive PCBs.
Technical Context
The SMCJ22C implements a glass-passivated silicon avalanche junction optimized for fast transient suppression without degradation under repetitive surges. Its bidirectional configuration enables symmetrical clamping in AC-coupled or floating signal paths, eliminating polarity dependency during layout.
Thermal performance is defined by RθJA = 55°C/W and RθJC = 10°C/W, supporting continuous operation up to TJ = 150°C. It meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability requirements for high-reliability assemblies.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins |
| VBR min/max | 24.4 V / 29.8 V @ IT = 1 mA - Ensures reliable avalanche initiation across process variation |
| VC @ IPPM | 39.4 V @ 39 A - Limits downstream voltage stress during 10/1000 µs transients |
| PPK | 1500 W - Peak pulse power handling per single 1 ms surge event |
| IR @ VWM | <1 µA - Negligible standby leakage in battery-backed or low-power circuits |
| Response time | <1.0 ps - Clamps before most IC input structures experience damage |
| Package | DO-214AB (SMC) - Standardized SMT footprint compatible with IPC-7351B land patterns |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking for unidirectional variants; SMCJ22C is bidirectional and lacks polarity marking - terminals are symmetrical and interchangeable.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional avalanche junction terminals | No polarity assignment - either terminal serves as clamping node for positive or negative transients |
| Case | Non-electrical mechanical body | UL 94V-0 molded compound provides flame resistance and mechanical stability during reflow |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated for Pulse 1 (inductive switch-off), Pulse 2a/2b (battery disconnect/connect), and Pulse 3a/3b (line transients) - required for automotive ECUs |
| Glass-passivated junction | Stable VBR over temperature and lifetime; eliminates surface contamination sensitivity in humid environments |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - supports standard SMT line throughput without dry-pack handling |
| RoHS & halogen-free | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - suitable for green manufacturing programs |
| Automated placement compatibility | Standard DO-214AB geometry and matte tin plating meet J-STD-002 solderability - no special feeders or vision calibration needed |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
Use Scenario: 12V battery rail in engine control units exposed to load dump (ISO 7637-2 Pulse 5a) and alternator ripple. IC Role / Device Role / Timing Role: Primary clamping device placed upstream of DC-DC converters and microcontroller power inputs. Use Value: Limits transient voltage to ≤39.4V, preventing latch-up or oxide breakdown in 3.3V/5V logic supplies. | Use Scenario: 4–20mA current loop interface in PLC analog input modules subjected to EFT bursts (IEC 61000-4-4). IC Role / Device Role / Timing Role: Bidirectional shunt protector across signal lines to ground, absorbing ±1kV/5kHz bursts. Use Value: Maintains signal integrity below 1µA leakage, avoiding offset errors in precision current sensing. |
| LED Driver Surge Suppression | USB Port ESD Protection |
Use Scenario: Constant-current LED driver output in outdoor signage exposed to lightning-induced surges on long cable runs. IC Role / Device Role / Timing Role: Parallel-connected TVS across LED string terminals to clamp induced common-mode transients. Use Value: Withstands 1500W peak pulses without degradation, preserving luminance stability over 10,000+ surge events. | Use Scenario: VBUS and D+/D− lines in USB 2.0 host ports subjected to ±8kV contact ESD (IEC 61000-4-2). IC Role / Device Role / Timing Role: Low-capacitance bidirectional clamp protecting USB transceivers from electrostatic discharge. Use Value: Sub-1ps response ensures clamping occurs before transceiver ESD diodes activate, reducing failure rate in field deployments. |
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 rating, lower PPK (600W vs. 1500W), VC = 35.5V @ 17A | Limited to lower-energy transients; insufficient for ISO 7637-2 Pulse 5a load dump | Select only when surge energy is constrained to <600W and board space requires smaller SMB footprint |
| 1.5KE22CA (ON Semiconductor) | Through-hole DO-15 package, 1500W rating, VC = 33.2V @ 45.2A, slower thermal recovery | Not SMT-compatible; unsuitable for automated assembly or high-density layouts | Choose only for legacy through-hole designs or prototyping where reflow compatibility is not required |
Compared with SMBJ22CA and 1.5KE22CA, the SMCJ22C delivers higher surge robustness in a standardized SMT package, enabling direct integration into automotive and industrial PCBs requiring ISO 7637-2 compliance without layout redesign or thermal derating penalties.
Availability
SMCJ22C is available at Aetrix Electronics and suitable for automotive ECU protection, industrial sensor interface hardening, and LED driver surge suppression requiring stable component supply across multi-year production cycles.
Supply support for SMCJ22C 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 industrial and automotive markets.
The SMCJ series was developed specifically for high-energy transient suppression in harsh-environment applications, emphasizing ISO 7637-2 compliance, SMT manufacturability, and long-term reliability under thermal cycling.
FAQ
What is the clamping voltage of SMCJ22C at its rated peak pulse current?
The SMCJ22C has a maximum clamping voltage (VC) of 39.4 V at 39 A peak impulse current (IPPM), measured under the 10/1000 µs waveform per IEC 61000-4-5. This value defines the upper voltage limit imposed on protected circuitry during worst-case transients and is confirmed in the official Taiwan Semiconductor datasheet revision S2104.
Is SMCJ22C unidirectional or bidirectional, and how is polarity indicated?
The SMCJ22C is a bidirectional TVS diode - it clamps symmetrically for both positive and negative transients and carries no cathode band marking. Unlike unidirectional variants (e.g., SMCJ22A), the 'C' suffix explicitly denotes bidirectional functionality, and its terminals are electrically interchangeable in circuit layout.
Does SMCJ22C meet automotive transient immunity standards?
Yes, the SMCJ22C meets ISO 7637-2 requirements for Pulses 1, 2a, 2b, 3a, and 3b, as verified in Taiwan Semiconductor's characterization data. Its 1500W peak power rating and fast response enable compliance with OEM-level surge test plans for 12V vehicle networks without additional external filtering.
What is the maximum junction temperature and thermal resistance of SMCJ22C?
The SMCJ22C has a maximum junction temperature (TJ) of +150°C and thermal resistances of RθJA = 55°C/W (junction-to-ambient) and RθJC = 10°C/W (junction-to-case). These values are measured under standard JEDEC conditions and support operation in under-hood automotive environments with appropriate PCB copper area.
Can SMCJ22C be used in place of SMCJ22A in a design?
No - SMCJ22C and SMCJ22A are functionally distinct: SMCJ22C is bidirectional, while SMCJ22A is unidirectional with a cathode band. Substituting one for the other without circuit review risks improper clamping during negative transients or forward conduction in DC-biased rails. Always verify polarity and transient directionality before replacement.
SMCJ22C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMCJ
- 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:
- 39.4V
- Current - Peak Pulse (10/1000µs):
- 39A
- 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)
SMCJ22C FAQ
1.How can I place an order for SMCJ22C through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22C 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 SMCJ22C reliable?
The price and inventory of SMCJ22C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22C is usually 5 days.
3.What payment methods are accepted for SMCJ22C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22C?
SMCJ22C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22C 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 SMCJ22C?
For technical support, including SMCJ22C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22C requirements.
6.How does Aetrix verify that SMCJ22C is sourced from the original manufacturer or authorized distributors?
All SMCJ22C 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 SMCJ22C meets industry standards.
7.What is the process for return or replacement of SMCJ22C?
All SMCJ22C units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22C, 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 SMCJ22C part is unused and in its original packaging.
Return procedure for SMCJ22C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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