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Taiwan Semiconductor Corporation SMDJ20CAH
- Part No.:
- SMDJ20CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
SMDJ20CAH.pdf
- Description:
- TVS DIODE 20VWM 32.4VC DO214AB
- Quantity:
- Payment:
- Shipping:
Inventory:8,500
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Product details
Overview
SMDJ20CAH from Taiwan Semiconductor is a bidirectional 3000W surface-mount transient voltage suppressor (TVS) diode in DO-214AB (SMC) package, with a working stand-off voltage of 20 V, breakdown voltage range of 22.2–24.5 V at 1 mA test current, and clamping voltage of 32.4 V at 92.6 A peak pulse current. It is AEC-Q101 qualified and designed for ESD and surge protection in automotive power-line and industrial control interfaces.
For engineers reviewing the SMDJ20CAH datasheet, SMDJ20CAH pinout, SMDJ20CAH application, or SMDJ20CAH equivalent, key selection criteria include bidirectional clamping performance, ISO 7637-2 Pulse 1/2a/2b/3a/3b compliance, 1.0 ps typical response time, TJ = –55°C to +175°C operating range, and DO-214AB mechanical compatibility with automated SMT assembly.
Technical Context
The SMDJ20CAH implements a glass-passivated silicon junction optimized for high-energy transient suppression in both polarities. Its unidirectional/bidirectional symmetry enables use without polarity awareness in DC bus protection, while its 3000 W peak pulse power rating (tp = 1 ms) supports robust immunity against load dump and inductive switching events.
Thermal design is enabled by RθJA = 75°C/W and RθJL = 15°C/W, allowing sustained operation up to TJ = 175°C. The device meets JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity, confirming suitability for reflow-soldered automotive PCBs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before leakage exceeds 1 µA |
| VBR @ IT=1 mA | 22.2–24.5 V - Verified breakdown threshold ensuring predictable turn-on during transients |
| VC @ IPPM=92.6 A | 32.4 V - Clamped voltage limiting downstream IC stress during 10/1000 µs surge events |
| PPK | 3000 W - Peak pulse power handling per single 1 ms waveform, per Fig.5 |
| TJ Range | –55°C to +175°C - Full automotive-grade junction temperature envelope |
| Package | DO-214AB (SMC) - Standardized 7.11 × 6.22 mm surface-mount outline with matte tin leads |
Pinout & Package
DO-214AB (SMC) package: dual-leaded, symmetrical, bidirectional device with cathode band omitted (no polarity marking required). Body dimensions: 7.11 mm × 6.22 mm × 2.34 mm; lead pitch: 5.28 mm; weight: 0.290 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode / Cathode (symmetrical) | Transient conduction path | Identical electrical behavior in either direction; no functional distinction between terminals |
| Case (body) | Thermal mass & mechanical anchor | Provides primary heat dissipation path to PCB copper; no electrical connection |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated reliability for automotive under-hood and powertrain applications |
| ISO 7637-2 compliance (Pulse 1/2a/2b/3a/3b) | Guaranteed immunity to standardized vehicle electrical disturbance waveforms |
| 1.0 ps typical response time | Enables clamping before sensitive logic or analog circuitry sustains damage |
| Moisture sensitivity level 1 | Zero bake requirement prior to reflow; compatible with standard SMT lines |
| Halogen-free & RoHS compliant | Meets IEC 61249-2-21 and EU Directive 2011/65/EU environmental requirements |
Applications
| Automotive Power Line Protection | Industrial PLC I/O Protection |
|---|---|
Use Scenario: Protecting 24 V CAN/LIN bus power rails from load dump and jump-start surges. IC Role / Device Role / Timing Role: Bidirectional TVS clamp placed directly at connector entry point to shunt energy before reaching regulator or transceiver. Use Value: Limits voltage to ≤32.4 V during 92.6 A transients, preventing overvoltage failure of downstream 36 V-rated regulators and interface ICs. | Use Scenario: Safeguarding digital input modules in programmable logic controllers exposed to field wiring transients. IC Role / Device Role / Timing Role: Front-end surge absorber on 24 V sensor supply line, coordinated with series impedance and filtering. Use Value: Absorbs 3000 W pulses without degradation, maintaining signal integrity and eliminating false triggering caused by >1 kV fast transients. |
| Telecom DC Power Feeds | Renewable Energy Charge Controllers |
Use Scenario: Shielding PoE-powered equipment DC inputs from induced lightning surges on outdoor cabling. IC Role / Device Role / Timing Role: Primary clamping element in multi-stage protection network upstream of DC-DC converter. Use Value: Clamps 10/1000 µs surges to 32.4 V while sustaining <1 µA leakage at 20 V, preserving efficiency and standby current budget. | Use Scenario: Protecting battery-side MOSFET gates and microcontroller supply in solar charge controllers subject to PV array switching spikes. IC Role / Device Role / Timing Role: Fast-acting voltage limiter across 12–48 V battery rail to prevent gate oxide rupture and MCU brownout. Use Value: Responds in <1 ps to limit transient overvoltage to safe levels, enabling reliable operation in off-grid environments with unstable grounding. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SAC20CA | Lower PPK = 1500 W; VC = 32.5 V @ 46.3 A; same VWM/VBR range | Not AEC-Q101 qualified; limited to commercial/industrial use | Select when cost sensitivity outweighs automotive qualification and 3000 W surge margin is unnecessary |
| SMCJ20CA | Identical electrical specs and DO-214AB package; manufactured by Vishay; same ISO 7637-2 compliance | No functional difference; validated drop-in replacement in existing designs | Choose for dual-sourcing flexibility or distributor stock availability without layout change |
Compared with SMDJ20CAH, SAC20CA offers lower surge capacity and no automotive qualification, while SMCJ20CA delivers identical performance and compliance with second-source assurance-making it ideal for supply chain resilience without design revision.
Availability
SMDJ20CAH is available at Aetrix Electronics and suitable for automotive power-line protection, industrial PLC I/O hardening, and telecom DC feed surge immunity requiring stable component supply across production lifecycles.
Supply support for SMDJ20CAH 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 SMDJ series was developed specifically for high-reliability, high-power transient suppression in harsh automotive environments, emphasizing AEC-Q101 compliance, ISO 7637-2 immunity, and robust thermal performance in compact SMC packages.
FAQ
What is the clamping voltage of the SMDJ20CAH under maximum rated surge current?
The SMDJ20CAH has a maximum clamping voltage (VC) of 32.4 V when subjected to its peak pulse current (IPPM) of 92.6 A under the standard 10/1000 µs waveform. This value is measured at TA = 25°C and ensures downstream components see no more than 32.4 V during worst-case transients. The SMDJ20CAH maintains this clamping performance across its full operating temperature range.
Is the SMDJ20CAH suitable for automotive applications?
Yes, the SMDJ20CAH is AEC-Q101 qualified and meets ISO 7637-2 Pulse 1, 2a, 2b, 3a, and 3b test requirements-making it suitable for automotive power-line and signal-line protection. Its –55°C to +175°C junction temperature range, glass-passivated junction, and JESD201 Class 2 whisker resistance further confirm its readiness for under-hood and powertrain use. The SMDJ20CAH is explicitly designed for this environment.
How does the bidirectional configuration of SMDJ20CAH affect PCB layout?
The SMDJ20CAH is inherently bidirectional with symmetrical terminals and no polarity marking, eliminating orientation constraints during placement. Unlike unidirectional TVS diodes, it requires no cathode band alignment or directional routing-reducing layout complexity and assembly error risk. This symmetry simplifies design reuse across AC-coupled or floating DC systems where polarity may vary. The SMDJ20CAH's DO-214AB footprint remains identical regardless of orientation.
What is the maximum steady-state power dissipation for SMDJ20CAH?
The SMDJ20CAH has a steady-state power dissipation (PD) rating of 6.5 W at TA = 25°C. This value decreases with rising ambient temperature per the derating curve in Figure 2 of the datasheet. It reflects continuous power handling capability-not transient surge capacity-and must be evaluated alongside PCB copper area, airflow, and thermal vias. The SMDJ20CAH's RθJA = 75°C/W informs thermal design margins.
Does SMDJ20CAH require special handling during reflow soldering?
No, the SMDJ20CAH is rated at Moisture Sensitivity Level 1 per J-STD-020, meaning it can be stored indefinitely at ≤30°C/60% RH and placed directly into standard lead-free reflow profiles without baking. Its matte tin-plated leads comply with J-STD-002 for solderability, and the DO-214AB package withstands peak temperatures up to 260°C. The SMDJ20CAH is fully compatible with automated SMT assembly lines used for automotive-grade PCBs.
SMDJ20CAH 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):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 92.6A
- Power - Peak Pulse:
- 3000W (3kW)
- Power Line Protection:
- No
- Applications:
- Telecom
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
SMDJ20CAH FAQ
1.How can I place an order for SMDJ20CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMDJ20CAH 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 SMDJ20CAH reliable?
The price and inventory of SMDJ20CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMDJ20CAH is usually 5 days.
3.What payment methods are accepted for SMDJ20CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMDJ20CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMDJ20CAH?
SMDJ20CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMDJ20CAH 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 SMDJ20CAH?
For technical support, including SMDJ20CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMDJ20CAH requirements.
6.How does Aetrix verify that SMDJ20CAH is sourced from the original manufacturer or authorized distributors?
All SMDJ20CAH 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 SMDJ20CAH meets industry standards.
7.What is the process for return or replacement of SMDJ20CAH?
All SMDJ20CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMDJ20CAH, 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 SMDJ20CAH part is unused and in its original packaging.
Return procedure for SMDJ20CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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