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Taiwan Semiconductor Corporation SMCJ22CAH
- Part No.:
- SMCJ22CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22CAH.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,078
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Product details
Overview
SMCJ22CAH 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. It is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b for automotive load-dump and ESD protection.
For engineers reviewing the SMCJ22CAH datasheet, SMCJ22CAH pinout, SMCJ22CAH application, or SMCJ22CAH equivalent, this device is selected for robust overvoltage immunity in automotive power-line interfaces, industrial I/O ports, and telecom DC feed circuits where fast response (<1.0 ps), low leakage (<1 µA @ 22V), and bidirectional clamping are required.
Technical Context
The SMCJ22CAH implements a glass-passivated silicon junction optimized for high-energy transient suppression in both polarities. Its bidirectional configuration enables symmetrical clamping without external polarity management, supporting compliance with ISO 7637-2 test pulses across automotive 12V and 24V systems.
Thermal performance is defined by RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C. The device sustains 200A non-repetitive forward surge (IFSM) and maintains <1 µA reverse leakage above 10V - critical for low-power standby circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before clamping begins; sets system-level DC bus tolerance margin. |
| VBR min/max | 24.4 V / 26.9 V - Breakdown occurs within this range at 1 mA test current; defines turn-on consistency across production lots. |
| VC @ IPPM | 35.5 V @ 44 A - Clamped voltage during 10/1000 µs surge; determines protected circuit's maximum transient overvoltage exposure. |
| PPK | 1500 W - Peak pulse power rating per 1 ms waveform; quantifies single-event energy absorption capability. |
| IR @ VWM | <1 µA - Reverse leakage at rated stand-off voltage; ensures minimal quiescent power loss in always-on monitoring circuits. |
| TJ max | +150 °C - Maximum junction temperature; supports under-hood automotive placement without derating at ambient ≤125°C. |
| Package | DO-214AB (SMC) - Industry-standard surface-mount outline with 7.11 mm x 6.22 mm footprint and 2.3 mm height; compatible with automated reflow assembly. |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (bidirectional operation renders band non-functional but retained for mechanical alignment). Weight ≈ 0.210 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Bidirectional transient conduction path | No functional polarity - terminals interchangeable; clamps voltage excursions above ±35.5 V in either direction. |
| Case (body) | Thermal and mechanical interface | Provides primary heat path to PCB copper; requires ≥25 mm² thermal pad for full 1500 W rating. |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing - suitable for engine control, body electronics, and ADAS power rails. |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (ESD-coupled noise) without degradation - eliminates need for supplemental filtering in 12V/24V systems. |
| Fast response time | <1.0 ps rise-to-breakdown - limits voltage overshoot during nanosecond-scale ESD events (IEC 61000-4-2), protecting sensitive CAN/LIN transceivers. |
| Moisture sensitivity level 1 | Unlimited floor life at ≤30°C/60% RH - no baking required prior to reflow, reducing manufacturing overhead and moisture-related delamination risk. |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU - meets environmental requirements for global automotive and industrial OEMs. |
Applications
| Automotive Power Distribution | Industrial PLC I/O 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 bidirectional TVS clamp placed upstream of DC-DC converters and microcontrollers. Use Value: Limits transient voltage to ≤35.5 V during 1500 W surges, preventing latch-up or gate oxide damage in downstream 3.3V/5V logic. | Use Scenario: 24V digital input module subjected to field-wiring induced surges and contact bounce. IC Role / Device Role / Timing Role: Front-end transient suppressor on isolated input channel before optocoupler or Schmitt trigger. Use Value: Maintains signal integrity by clamping >22V transients within 1 ps, enabling reliable edge detection without false triggering. |
| Telecom DC Power Feeds | Medical Equipment Auxiliary Supplies |
Use Scenario: -48V DC power interface in base station remote radio units exposed to lightning-induced surges. IC Role / Device Role / Timing Role: Secondary protection stage after gas discharge tube (GDT), absorbing residual energy post-GDT crowbar. Use Value: Provides precise 35.5V clamping with <1 µA leakage - avoids loading -48V bias networks while ensuring sub-50V stress on downstream DC-DC controllers. | Use Scenario: 5V/12V auxiliary supply rail in diagnostic imaging subsystems requiring low-noise, low-leakage protection. IC Role / Device Role / Timing Role: Standby-mode TVS on always-powered rails feeding real-time clocks and memory retention circuits. Use Value: Delivers <1 µA leakage at 22V stand-off - preserves battery backup runtime and prevents drift in precision analog front-ends. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ22CA | Same DO-214AC (SMA) package; lower PPK (400W); VBR 24.4–27.0V; VC = 35.5V @ 11.9A | Lower surge rating suits cost-sensitive consumer electronics; not AEC-Q101 qualified | Select SMAJ22CA only for non-automotive, low-energy environments where PCB space allows larger footprint. |
| ON Semiconductor 1.5KE22CA | Through-hole DO-15 package; PPK = 1500W; VBR 23.1–25.5V; VC = 33.2V @ 45.2A; higher IFSM (200A) | Requires through-hole assembly; better clamping but incompatible with SMT-only lines | Choose 1.5KE22CA only when legacy through-hole design mandates or when superior thermal mass from lead-frame improves long-duration surge handling. |
Compared with SMAJ22CA and 1.5KE22CA, the SMCJ22CAH delivers identical clamping performance (35.5V) with AEC-Q101 validation and SMT compatibility - making it the sole choice for new automotive and industrial SMT designs requiring full ISO 7637-2 compliance.
Availability
SMCJ22CAH is available at Aetrix Electronics and suitable for automotive power distribution, industrial PLC I/O protection, and telecom DC power feeds requiring stable component supply across multi-year production cycles.
Supply support for SMCJ22CAH 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, and rectifiers with global automotive and industrial certifications.
The SMCJ series was developed specifically for high-reliability transient suppression in harsh environments - emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in compact SMT packages.
FAQ
What does the 'CAH' suffix indicate in SMCJ22CAH?
The 'CAH' suffix in SMCJ22CAH denotes a bidirectional configuration with AEC-Q101 qualification and halogen-free construction. Unlike unidirectional 'H' variants, the 'CAH' version clamps symmetrically in both polarities - essential for protecting AC-coupled or floating reference circuits. This designation is confirmed in TSC's ordering documentation and electrical specifications table.
Is SMCJ22CAH compliant with ISO 7637-2 Pulse 5a (load dump)?
No - SMCJ22CAH meets ISO 7637-2 Pulses 1, 2a, 2b, 3a, and 3b, but not Pulse 5a (load dump), which requires higher clamping energy handling beyond its 1500W rating. For Pulse 5a, designers must pair SMCJ22CAH with upstream GDTs or use higher-rated devices like TSK series. This limitation is explicitly stated in TSC's application notes and test condition footnotes.
What is the maximum clamping voltage of SMCJ22CAH under standard test conditions?
The maximum clamping voltage (VC) of SMCJ22CAH is 35.5 V at 44 A peak pulse current (IPPM), measured using the 10/1000 µs double-exponential waveform per Fig.5 in the datasheet. This value is guaranteed across temperature (−55°C to +150°C) and represents worst-case voltage seen by protected circuitry during transient events.
Does SMCJ22CAH require derating at elevated ambient temperatures?
Yes - SMCJ22CAH must be derated above TA = 25°C per the Pulse Derating Curve (Fig.2). At 85°C ambient, its 1500W peak pulse rating drops to approximately 900W. This linear derating is based on RθJA = 55°C/W and is mandatory for sustained surge reliability; failure to apply derating risks thermal runaway during repeated transients.
Can SMCJ22CAH be used in place of unidirectional SMCJ22AH?
No - SMCJ22CAH is bidirectional and lacks polarity marking for anode/cathode orientation, whereas SMCJ22AH is unidirectional with a defined cathode band. Substituting them requires verifying circuit topology: SMCJ22CAH works only where symmetrical clamping is acceptable (e.g., differential lines), while SMCJ22AH is mandatory for DC-biased rails needing directional blocking. Pinout and function are not interchangeable.
SMCJ22CAH 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:
- 35.5V
- Current - Peak Pulse (10/1000µs):
- 44A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 150°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMCJ22CAH FAQ
1.How can I place an order for SMCJ22CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22CAH 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 SMCJ22CAH reliable?
The price and inventory of SMCJ22CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22CAH is usually 5 days.
3.What payment methods are accepted for SMCJ22CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22CAH?
SMCJ22CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22CAH 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 SMCJ22CAH?
For technical support, including SMCJ22CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22CAH requirements.
6.How does Aetrix verify that SMCJ22CAH is sourced from the original manufacturer or authorized distributors?
All SMCJ22CAH 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 SMCJ22CAH meets industry standards.
7.What is the process for return or replacement of SMCJ22CAH?
All SMCJ22CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22CAH, 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 SMCJ22CAH part is unused and in its original packaging.
Return procedure for SMCJ22CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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