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Taiwan Semiconductor Corporation SMDJ22CA
- Part No.:
- SMDJ22CA
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ22CA.pdf
- Description:
- TVS DIODE 22VWM 35.5VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:3,000
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Product details
Overview
SMDJ22CA from Taiwan Semiconductor is a bidirectional 3000W surface-mount transient voltage suppressor (TVS) diode with a working stand-off voltage of 22 V, breakdown voltage range 24.4–26.9 V at 1 mA, and clamping voltage of 35.5 V at 84.5 A peak pulse current. It is designed for ESD and surge protection in DC power rails and signal lines of industrial control systems, automotive electronics, and telecom infrastructure.
For engineers reviewing the SMDJ22CA datasheet, SMDJ22CA pinout, SMDJ22CA application, or SMDJ22CA equivalent, key selection criteria include its DO-214AB (SMC) package compatibility, bipolar clamping symmetry, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, sub-1 ps response time, and 175 °C maximum junction temperature capability.
Technical Context
The SMDJ22CA employs a glass-passivated silicon junction optimized for high-energy transient suppression. Its bidirectional configuration enables symmetrical clamping in both polarities without external polarity management, supporting robust protection of AC-coupled interfaces and floating bus lines.
It delivers 3000 W peak pulse power (10/1000 µs waveform), with thermal resistance of 75 °C/W (junction-to-ambient) and 15 °C/W (junction-to-lead), enabling reliable operation under repeated surge stress when mounted on standard PCB copper areas per recommended pad layout.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 22 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR @ IT=1 mA | 24.4–26.9 V - Verified breakdown threshold ensuring predictable turn-on during transients |
| VC @ IPPM=84.5 A | 35.5 V - Clamped voltage limiting downstream circuit stress during 3000 W surge events |
| PPK | 3000 W - Peak pulse power rating per 10/1000 µs waveform, defining surge energy handling |
| TJ max | 175 °C - Maximum junction temperature enabling operation in high-ambient industrial environments |
| Package | DO-214AB (SMC) - Standardized surface-mount outline with 7.11 × 6.22 mm footprint and 2.3 mm height |
| Response time | <1.0 ps - Sub-picosecond junction response ensures protection before sensitive ICs are damaged |
Pinout & Package
DO-214AB (SMC) package: molded plastic case with matte tin-plated leads, polarity indicated by cathode band (not functional in bidirectional SMDJ22CA); weight ≈ 0.290 g; UL 94V-0 rated compound.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Bidirectional terminal pair | No functional polarity - either terminal serves as anode or cathode depending on transient polarity |
| Case / Body | Non-electrical mechanical interface | Provides thermal path to PCB copper and mechanical mounting; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| ISO 7637-2 compliance | Validated against Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnect), and Pulse 3a/3b (switching noise) waveforms |
| Glass passivated junction | Enhances long-term reliability and stability of VBR and leakage under thermal cycling and humidity |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow - compatible with standard J-STD-020 assembly processes |
| Halogen-free construction | Meets IEC 61249-2-21 requirements for environmentally compliant PCB assembly |
| RoHS compliance | Lead-free and fully compliant with EU Directive 2011/65/EU for restricted hazardous substances |
Applications
| Industrial Motor Drives | Automotive Body Control Modules |
|---|---|
Use Scenario: Protection of 24 V DC power inputs in PLC I/O modules exposed to inductive kickback from solenoid valves and relay coils. IC Role / Device Role / Timing Role: Bidirectional TVS device placed across input rail to clamp transients up to ±35.5 V before they reach upstream regulators and microcontrollers. Use Value: Prevents latch-up or permanent damage in 3.3 V/5 V logic circuits by limiting rail excursion within safe operating area during 3000 W surges. | Use Scenario: Surge suppression on LIN bus lines and sensor supply rails in door module ECUs subjected to battery load dump and ESD events. IC Role / Device Role / Timing Role: Standoff-rated TVS connected between LIN signal line and ground to absorb fast-rising transients while maintaining signal integrity. Use Value: Maintains <1 µA leakage at 22 V, ensuring minimal impact on LIN bus biasing and enabling reliable communication during ISO 7637-2 Pulse 2b testing. |
| Telecom Power Feeds | Renewable Energy Inverters |
Use Scenario: DC input protection in PoE-powered remote radio units where lightning-induced surges couple onto 48 V DC feed lines. IC Role / Device Role / Timing Role: Primary-level TVS placed at board edge to shunt common-mode surges before entering DC-DC converters and Ethernet PHYs. Use Value: Clamps 84.5 A peak current to 35.5 V within <1 ps, preventing overvoltage failure of isolated DC-DC controllers rated for ≤40 V input. | Use Scenario: Protection of auxiliary 24 V control rails in solar string inverters exposed to grid-switching transients and nearby lightning strikes. IC Role / Device Role / Timing Role: Bidirectional TVS installed across control supply and ground to handle reverse-polarity surges from transformer coupling or grounding faults. Use Value: Symmetrical clamping ensures equal protection for positive and negative transients, eliminating need for dual unidirectional devices and reducing BOM count. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC22CA (Littelfuse) | Same DO-214AB package; VBR = 24.4–26.9 V; VC = 35.5 V @ 84.5 A; PPK = 3000 W; meets ISO 7637-2 | Identical clamping performance but slightly higher RθJA (80 °C/W vs. 75 °C/W) | Drop-in replacement where thermal margin allows; verify layout cooling capacity matches Littelfuse's derating curve. |
| 1.5KE22CA (ON Semiconductor) | Through-hole TO-218 package; same VWM/VBR/VC; PPK = 1500 W (half the rating); slower response (~1.5 ps) | Not suitable for high-density SMT designs; limited to lower-energy surge environments | Only acceptable if board space permits through-hole mounting and system-level surge energy is confirmed ≤1500 W. |
Compared with SAC22CA and 1.5KE22CA, the SMDJ22CA offers superior thermal performance in compact SMT form factor and full 3000 W rating - critical for modern automotive and industrial designs requiring high-reliability, high-density surge protection without layout compromise.
Availability
SMDJ22CA is available at Aetrix Electronics and suitable for industrial motor drives, automotive body control modules, telecom power feeds, and renewable energy inverters requiring stable component supply and consistent surge immunity performance across production batches.
Supply support for SMDJ22CA 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, with global distribution and AEC-Q200 qualified product lines.
The SMDJ series is engineered specifically for high-power, surface-mount transient suppression in harsh electromagnetic environments - targeting automotive, industrial, and telecom applications demanding ISO 7637-2 compliance and extended temperature operation.
FAQ
What is the maximum clamping voltage of the SMDJ22CA under peak surge conditions?
The SMDJ22CA has a maximum clamping voltage (VC) of 35.5 V when subjected to its rated peak pulse current of 84.5 A (10/1000 µs waveform). This value is measured per JEDEC standards and guarantees that downstream components see no more than 35.5 V during a full 3000 W transient event. The SMDJ22CA maintains this clamping performance across its specified operating temperature range of –55 °C to +175 °C.
Is the SMDJ22CA suitable for bidirectional signal line protection?
Yes, the SMDJ22CA is explicitly designed as a bidirectional TVS diode, with identical electrical characteristics in both forward and reverse directions. Its symmetrical clamping behavior makes it ideal for protecting AC-coupled data lines (e.g., RS-485, CAN, LIN), floating sensor outputs, and dual-rail power domains where polarity reversal may occur. The SMDJ22CA does not require orientation during placement.
Does the SMDJ22CA meet automotive surge immunity standards?
Yes, the SMDJ22CA meets ISO 7637-2 requirements for Pulse 1 (inductive load dump), Pulse 2a/2b (battery disconnection), and Pulse 3a/3b (capacitive coupled switching noise), making it suitable for use in automotive body electronics, infotainment, and ADAS subsystems. It is not AEC-Q200 qualified out-of-box, but TSC offers AEC-Q200 versions in the same SMDJ family upon request.
What is the moisture sensitivity level (MSL) rating for the SMDJ22CA?
The SMDJ22CA is rated MSL Level 1 per J-STD-020, meaning it can be stored indefinitely at ambient conditions (<30 °C / 60% RH) and requires no baking prior to reflow soldering. This simplifies manufacturing logistics and eliminates risk of popcorning during standard lead-free reflow profiles, supporting high-yield automated assembly of the SMDJ22CA into industrial and automotive PCBs.
How does the SMDJ22CA compare to unidirectional SMDJ22A in terms of circuit implementation?
The SMDJ22CA replaces two unidirectional SMDJ22A devices in back-to-back configuration, reducing component count, PCB area, and assembly cost. Unlike the SMDJ22A, which requires correct cathode orientation and only protects one polarity, the SMDJ22CA provides identical clamping in both directions without polarity constraints. Its marking code "DEX" and CA suffix confirm its bidirectional identity, and the SMDJ22CA shares the same DO-214AB package and thermal profile as the SMDJ22A.
SMDJ22CA Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- SMDJ
- 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):
- 84.5A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ22CA FAQ
1.How can I place an order for SMDJ22CA through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ22CA 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 SMDJ22CA reliable?
The price and inventory of SMDJ22CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ22CA is usually 5 days.
3.What payment methods are accepted for SMDJ22CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ22CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ22CA?
SMDJ22CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ22CA 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 SMDJ22CA?
For technical support, including SMDJ22CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ22CA requirements.
6.How does Aetrix verify that SMDJ22CA is sourced from the original manufacturer or authorized distributors?
All SMDJ22CA 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 SMDJ22CA meets industry standards.
7.What is the process for return or replacement of SMDJ22CA?
All SMDJ22CA units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ22CA, 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 SMDJ22CA part is unused and in its original packaging.
Return procedure for SMDJ22CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMDJ22CA Tags
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