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Taiwan Semiconductor Corporation 5.0SMDJ20A
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- Part No.:
- 5.0SMDJ20A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AB, SMC
- Datasheet:
-
5.0SMDJ20A.pdf
- Description:
- 5000W, 23.4V, 5%, UNIDIRECTIONAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,948
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Product details
Overview
5.0SMDJ20A from Taiwan Semiconductor is a unidirectional surface-mount transient voltage suppressor (TVS) diode designed for high-energy surge protection in DC power lines and I/O interfaces. It delivers 5000W peak pulse power at 10/1000μs, clamps transients to ≤32.4V at 155A, and features a 20V working standoff voltage with <5µA leakage. It is used in AC/DC power supplies to protect downstream regulators and controllers from lightning-induced surges.
For engineers reviewing the 5.0SMDJ20A datasheet, 5.0SMDJ20A pinout, 5.0SMDJ20A application, or 5.0SMDJ20A equivalent, key selection criteria include its 22.2–24.5V breakdown range, DO-214AB (SMC) package thermal performance (RθJL = 16°C/W), unidirectional polarity marking, and compliance with JESD201 Class 2 whisker resistance and J-STD-020 Level 1 moisture sensitivity.
Technical Context
The 5.0SMDJ20A employs a stacked-die construction in a single DO-214AB package to achieve high peak pulse power handling while maintaining low clamping voltage. Its photo-glass passivated junction ensures stable VBR tolerance and long-term reliability under repetitive surge stress.
Designed for unidirectional operation only, it exhibits fast response (<1.0ps), low forward voltage (5V @ 100A), and operates across –55°C to +175°C junction temperature. Thermal derating follows a defined curve above 25°C ambient, with steady-state power dissipation limited to 6.25W at TL = 75°C on a 16mm × 16mm copper pad.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 20 V - Maximum continuous reverse operating voltage before leakage exceeds 5 µA |
| VBR @ IT=1 mA | 22.2–24.5 V - Verified breakdown threshold ensuring reliable turn-on during overvoltage events |
| VC @ IPP=155 A | 32.4 V - Clamped voltage limiting stress on protected ICs during 10/1000µs surge |
| PPPSM | 5000 W - Peak pulse power capability enabling robust protection against IEC 61000-4-5 Level 4 surges |
| RθJL | 16 °C/W - Junction-to-lead thermal resistance supporting high-power pulse dissipation without solder joint failure |
| αVBR | 0.099 mV/°C - Temperature coefficient of breakdown voltage used for thermal drift compensation in precision designs |
Pinout & Package
Package: DO-214AB (SMC), surface-mount, unidirectional configuration with cathode band marking. Case meets UL 94V-0 flammability rating; matte tin-plated leads comply with J-STD-002 solderability.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected circuit ground or low-side return path in unidirectional clamp topology |
| Cathode | Current exit point during reverse-biased clamping | Connected to line being protected (e.g., +24V rail); polarity band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 5000W peak pulse power | Enables single-device protection against high-energy transients per IEC 61000-4-5, reducing component count vs. multi-stage solutions |
| Clamping voltage ≤32.4V @ 155A | Ensures safe operation of 24V-rated logic and power ICs downstream without additional series impedance |
| Fast response time <1.0ps | Prevents voltage overshoot before protection activates, critical for safeguarding fast-switching MOSFET gates |
| J-STD-020 Level 1 moisture sensitivity | Eliminates pre-bake requirement during SMT assembly, lowering manufacturing cost and cycle time |
| Stacked die architecture | Delivers high power density in DO-214AB footprint without compromising VBR consistency or thermal stability |
Applications
| AC/DC Power Input Protection | I/O Interface Protection |
|---|---|
Use Scenario: Protecting primary-side rectifier outputs and secondary-side DC rails in industrial switch-mode power supplies against lightning-induced surges and load dump transients. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between rail and ground to shunt surge current away from PWM controllers and gate drivers. Use Value: Limits rail voltage to ≤32.4V during 5000W pulses, preventing latch-up or permanent damage to 36V-tolerant control ICs. | Use Scenario: Safeguarding RS-485 transceivers, CAN bus nodes, and PLC digital input circuits exposed to ESD and inductive switching noise. IC Role / Device Role / Timing Role: Line-to-ground transient suppressor on signal lines, leveraging fast <1.0ps response to intercept fast-rising EFT bursts. Use Value: Maintains signal integrity by clamping transients before they exceed receiver absolute maximum ratings, avoiding data corruption or reset events. |
| Motor Drive DC Bus Protection | Automotive Body Control Module (BCM) |
Use Scenario: Suppressing inductive kickback from brushed DC motors and solenoids connected to 24V DC bus in factory automation systems. IC Role / Device Role / Timing Role: High-power unidirectional clamp absorbing energy from L·di/dt spikes generated during MOSFET turn-off. Use Value: Prevents voltage overshoot beyond 32.4V that could exceed the 40V rating of half-bridge gate drivers and cause shoot-through failure. | Use Scenario: Protecting microcontroller GPIOs and LIN bus transceivers in automotive BCMs subjected to ISO 7637-2 pulse 1, 2a, and 5a transients. IC Role / Device Role / Timing Role: Primary-level surge suppression on 12V/24V supply inputs prior to LDO regulation and system power sequencing. Use Value: Withstands 5000W pulses while maintaining VWM = 20V, allowing compatibility with 24V nominal systems and margin for battery ripple. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ20A | Lower peak power (600W), same DO-214AA package, VC = 32.4V @ 18.3A | Suitable for lower-energy threats (IEC 61000-4-2 ESD only); insufficient for IEC 61000-4-5 Level 4 | Select 5.0SMDJ20A when full 5000W surge immunity is required; SMBJ20A may be used where space allows larger footprint but power demand is lower. |
| SMCJ20A | Same 5000W rating and DO-214AB package, but VC = 32.4V @ 155A and VBR = 22.2–24.5V - identical electrical specs | Functionally interchangeable; differs only in manufacturer branding and minor process variations | SMCJ20A is a direct functional alternative with matching clamping, breakdown, and thermal specs - suitable for second-source procurement where Taiwan Semiconductor supply is constrained. |
Compared with SMBJ20A and SMCJ20A, the 5.0SMDJ20A provides identical surge capability to SMCJ20A but superior energy handling versus SMBJ20A, making it optimal for high-reliability 24V industrial power rails where both IEC 61000-4-2 and -4-5 compliance are mandatory.
Availability
5.0SMDJ20A is available at Aetrix Electronics and suitable for AC/DC power supplies, motor drive DC buses, industrial I/O interfaces, and automotive body control modules requiring stable component supply and full IEC 61000-4-5 Level 4 surge immunity.
Supply support for 5.0SMDJ20A 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 power management devices.
The 5.0SMDJ20A belongs to TSC's high-power SMDJ series, engineered specifically for industrial-grade surge protection in harsh environments where extended temperature operation, high pulse energy absorption, and long-term parametric stability are critical.
FAQ
What is the maximum clamping voltage of the 5.0SMDJ20A under a 10/1000µs surge?
The 5.0SMDJ20A has a maximum clamping voltage (VC) of 32.4 V when subjected to a 155 A peak pulse current with a 10/1000 µs waveform. This value is measured at TA = 25°C and defines the upper voltage limit imposed on protected circuitry during standardized surge events. The 5.0SMDJ20A maintains this clamping performance consistently across its rated operating temperature range.
Is the 5.0SMDJ20A suitable for bidirectional transient suppression?
No, the 5.0SMDJ20A is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical specifications-including breakdown voltage, clamping behavior, and leakage current-are defined only for reverse-biased (cathode-positive) conditions. For bidirectional protection, a dedicated bidirectional part such as 5.0SMDJ20CA must be selected; using the 5.0SMDJ20A in AC-coupled or symmetrical signal paths may result in forward conduction failure.
What is the thermal resistance from junction to lead (RθJL) for the 5.0SMDJ20A?
The junction-to-lead thermal resistance (RθJL) of the 5.0SMDJ20A is 16 °C/W, measured under standard test conditions with the device mounted on a 16 mm × 16 mm copper pad PCB. This parameter directly impacts pulse power handling capability and must be considered when designing board-level thermal relief, especially for repeated surge events. The 5.0SMDJ20A leverages this low RθJL to sustain 5000W pulses without exceeding its 175°C maximum junction temperature.
Does the 5.0SMDJ20A require moisture preconditioning before reflow soldering?
No, the 5.0SMDJ20A is rated at Moisture Sensitivity Level (MSL) 1 per J-STD-020, meaning it has unlimited floor life and does not require baking or dry-pack storage prior to SMT reflow. This eliminates pre-reflow bake cycles, reduces manufacturing overhead, and avoids potential damage from moisture-induced popcorning. The 5.0SMDJ20A's MSL-1 rating is confirmed in its official datasheet revision D2102.
How does the 5.0SMDJ20A compare to the 5.0SMDJ22A in terms of working voltage and clamping performance?
The 5.0SMDJ20A has a 20 V working standoff voltage (VWM) and clamps at 32.4 V, while the 5.0SMDJ22A has a 22 V VWM and clamps at 35.5 V. Both share identical 5000W peak power and DO-214AB packaging, but the 5.0SMDJ20A offers tighter voltage margin for 24V systems where rail headroom is constrained. Select the 5.0SMDJ20A when protecting circuits with 28V absolute maximum ratings; use 5.0SMDJ22A where higher VWM improves noise immunity without sacrificing surge margin.
5.0SMDJ20A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AB, SMC
- Series:
- 5.0SMDJ
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 20V
- Voltage - Breakdown (Min):
- 22.2V
- Voltage - Clamping (Max) @ Ipp:
- 32.4V
- Current - Peak Pulse (10/1000µs):
- 155A
- Power - Peak Pulse:
- 5000W (5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AB (SMC)
5.0SMDJ20A FAQ
1.How can I place an order for 5.0SMDJ20A through Aetrix?
Please submit a Request for Quotation (RFQ) for 5.0SMDJ20A 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 5.0SMDJ20A reliable?
The price and inventory of 5.0SMDJ20A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 5.0SMDJ20A is usually 5 days.
3.What payment methods are accepted for 5.0SMDJ20A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 5.0SMDJ20A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 5.0SMDJ20A?
5.0SMDJ20A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 5.0SMDJ20A 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 5.0SMDJ20A?
For technical support, including 5.0SMDJ20A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 5.0SMDJ20A requirements.
6.How does Aetrix verify that 5.0SMDJ20A is sourced from the original manufacturer or authorized distributors?
All 5.0SMDJ20A 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 5.0SMDJ20A meets industry standards.
7.What is the process for return or replacement of 5.0SMDJ20A?
All 5.0SMDJ20A units undergo pre-shipment inspection (PSI). If there is an issue with 5.0SMDJ20A, 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 5.0SMDJ20A part is unused and in its original packaging.
Return procedure for 5.0SMDJ20A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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