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Taiwan Semiconductor Corporation SMCJ22AH
- Part No.:
- SMCJ22AH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMCJ22AH.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:2,623
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Product details
Overview
SMCJ22AH from Taiwan Semiconductor is a unidirectional 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 provides robust ESD and surge protection for automotive power rails and industrial I/O interfaces.
For engineers reviewing the SMCJ22AH datasheet, SMCJ22AH pinout, SMCJ22AH application, or SMCJ22AH equivalent, this device is selected for high-energy transient immunity in AEC-Q101-compliant systems requiring ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, fast sub-1ps response, and <1µA leakage above 10V.
Technical Context
The SMCJ22AH employs a glass-passivated silicon junction optimized for low dynamic impedance and stable clamping under repetitive 10/1000µs surge waveforms. Its unidirectional configuration enables asymmetric protection of DC power lines while maintaining tight VBR tolerance (±5.1% at IT = 1mA).
Thermally, it features RθJC = 10°C/W and RθJA = 55°C/W, enabling reliable operation up to TJ = +150°C in constrained PCB layouts. It meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity requirements.
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 / 26.9 V - Breakdown occurs within this range at 1 mA test current; ensures predictable turn-on margin |
| VC @ IPPM | 35.5 V - Clamps transients to ≤35.5 V at 44 A peak pulse current (10/1000 µs) |
| PPK | 1500 W - Peak pulse power handling capability defines surge energy absorption capacity |
| IR @ VWM | <1 µA - Ultra-low leakage preserves signal integrity and minimizes standby power loss |
| TJ max | +150 °C - Enables use in under-hood automotive and high-temperature industrial environments |
Pinout & Package
DO-214AB (SMC) surface-mount package with cathode band marking; 2-terminal unidirectional configuration; matte tin-plated leads compliant with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input/Line side | Connected to protected line; conducts during forward surge events (e.g., reverse polarity faults) |
| Cathode | Ground/Return side | Connected to system ground or low-impedance return path; defines clamping reference and polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per stress conditions |
| ISO 7637-2 compliance | Withstands Pulse 1 (inductive load dump), Pulse 2a/2b (switching transients), and Pulse 3a/3b (capacitive coupling) without degradation |
| Fast response time | <1.0 ps rise time from 0 V to VBR min ensures clamping initiates before sensitive downstream circuitry is stressed |
| Glass passivated junction | Enhances long-term stability and reduces parameter drift under thermal and humidity stress |
Applications
| Automotive Power Rail Protection | Industrial PLC Digital I/O |
|---|---|
Use Scenario: Protecting 24V battery-supplied ECUs against load dump and alternator transients per ISO 7637-2 Pulse 5a/5b. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power input and chassis ground to clamp surges before they reach LDOs or microcontrollers. Use Value: Limits voltage to ≤35.5 V during 44 A transients, preventing damage to 36 V-rated power management ICs. | Use Scenario: Shielding 24V digital input channels in programmable logic controllers from field-wiring induced surges and ESD. IC Role / Device Role / Timing Role: Front-end transient suppressor on each isolated input channel, paired with optocoupler or digital isolator. Use Value: Maintains <1 µA leakage at 22 V, avoiding false triggering of Schmitt-trigger inputs under normal operation. |
| Telecom DC Power Feeds | Motor Drive Control Board Inputs |
Use Scenario: Safeguarding -48 V telecom power distribution boards from lightning-induced surges on long-line feeds. IC Role / Device Role / Timing Role: Bidirectional protection not applicable; SMCJ22AH used in unidirectional configuration on positive rail only, with complementary device on negative rail if needed. Use Value: Delivers 1500 W peak power dissipation with 55°C/W junction-to-ambient thermal resistance for compact board layout. | Use Scenario: Protecting enable, direction, and fault feedback signals on industrial motor driver control boards exposed to back-EMF coupling. IC Role / Device Role / Timing Role: Point-of-use TVS on low-voltage logic-level signals (e.g., 24 V enable lines) referenced to local ground. Use Value: Clamps transients within 1 ps, faster than typical MCU GPIO response time, ensuring signal integrity during switching noise events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ22A | Lower PPK (400 W), smaller SMA package, higher VC (35.5 V same, but lower IPPM = 11.2 A) | Suitable for lower-energy transients; not rated for ISO 7637-2 Pulse 5 or high-current load dump | Select SMCJ22AH when 1500 W surge handling and AEC-Q101 qualification are required. |
| TPSMD22A | Same DO-214AB package, 1500 W rating, but VBR tighter (24.4–25.9 V), VC slightly higher (36.8 V), no AEC-Q101 documentation confirmed | Lacks published AEC-Q101 qualification; may require additional qualification for automotive use | Choose SMCJ22AH where certified automotive reliability and ISO 7637-2 compliance are mandatory. |
Compared with SMAJ22A and TPSMD22A, the SMCJ22AH delivers higher surge current capacity (44 A vs. 11.2 A / 40 A), verified AEC-Q101 qualification, and documented ISO 7637-2 Pulse 1–3 compliance-making it the preferred choice for mission-critical automotive and industrial power rail protection.
Availability
SMCJ22AH is available at Aetrix Electronics and suitable for automotive electronics, industrial PLCs, and telecom power systems requiring stable component supply, long-lifecycle support, and AEC-Q101-compliant surge protection.
Supply support for SMCJ22AH 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 analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, MOSFETs, and thyristors.
The SMCJ series was designed specifically for high-reliability transient suppression in automotive and industrial environments, emphasizing AEC-Q101 qualification, ISO 7637-2 compliance, and robust thermal performance in surface-mount packages.
FAQ
What is the clamping voltage of the SMCJ22AH under maximum rated surge current?
The SMCJ22AH has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current (IPPM) of 44 A using the standard 10/1000 µs waveform. This value is measured at TA = 25°C and guarantees that downstream components see no more than 35.5 V during transient events, provided layout minimizes parasitic inductance.
Is the SMCJ22AH suitable for bidirectional transient protection?
No, the SMCJ22AH is a unidirectional TVS diode and is not rated for bidirectional operation. For bidirectional protection, Taiwan Semiconductor offers the SMCJ22CAH variant with CH or CAH suffix. Using SMCJ22AH in reverse-biased configurations may result in premature failure or undefined clamping behavior.
Does the SMCJ22AH meet AEC-Q101 requirements for automotive applications?
Yes, the SMCJ22AH is explicitly qualified to AEC-Q101 Rev D standards, including stress tests for high-temperature reverse bias, temperature cycling, and ESD (HBM ≥ 8 kV). This qualification is documented in Taiwan Semiconductor's official product release A2102 and supports use in engine control units, body electronics, and ADAS power supplies.
What is the marking code for the SMCJ22AH on the device body?
The SMCJ22AH is marked with the code "GEX" on its DO-214AB (SMC) package. The marking appears adjacent to the cathode band and follows Taiwan Semiconductor's standardized coding scheme for the SMCJ(A)H family, where "GEX" uniquely identifies the 22 V unidirectional variant with tightened VBR tolerance.
How does the SMCJ22AH compare to the SMCJ22H in terms of electrical performance?
The SMCJ22AH offers a tighter breakdown voltage range (24.4–26.9 V) versus SMCJ22H (24.4–29.8 V), resulting in more consistent clamping onset and reduced risk of premature conduction. Both share identical VWM (22 V), PPK (1500 W), and package, but SMCJ22AH's narrower VBR improves design margin in precision protection applications.
SMCJ22AH 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:
- 1
- Bidirectional Channels:
- -
- 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)
SMCJ22AH FAQ
1.How can I place an order for SMCJ22AH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMCJ22AH 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 SMCJ22AH reliable?
The price and inventory of SMCJ22AH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMCJ22AH is usually 5 days.
3.What payment methods are accepted for SMCJ22AH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMCJ22AH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMCJ22AH?
SMCJ22AH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMCJ22AH 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 SMCJ22AH?
For technical support, including SMCJ22AH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMCJ22AH requirements.
6.How does Aetrix verify that SMCJ22AH is sourced from the original manufacturer or authorized distributors?
All SMCJ22AH 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 SMCJ22AH meets industry standards.
7.What is the process for return or replacement of SMCJ22AH?
All SMCJ22AH units undergo pre-shipment inspection (PSI). If there is an issue with SMCJ22AH, 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 SMCJ22AH part is unused and in its original packaging.
Return procedure for SMCJ22AH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMCJ22AH Tags
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