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Taiwan Semiconductor Corporation 1V5KE33A
- Part No.:
- 1V5KE33A
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1V5KE33A.pdf
- Description:
- TVS DIODE 28.2VWM 45.7VC DO201AD
- Quantity:
- Payment:
- Shipping:
Inventory:8,400
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Product details
Overview
1V5KE33A from Taiwan Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in DO-201 package, rated for 1500W peak pulse power at 1.0ms, with breakdown voltage 31.4–34.7V at 1mA test current, clamping voltage 45.7V at 33A peak pulse current, and reverse stand-off voltage 28.2V. It protects power rails and I/O lines in industrial motor drives and AC/DC power supplies against ESD and lightning-induced surges.
For engineers reviewing the 1V5KE33A datasheet, 1V5KE33A pinout, 1V5KE33A application, or 1V5KE33A equivalent, key selection criteria include verified clamping performance at 33A, DO-201 mechanical compatibility, unidirectional polarity marking, junction temperature range (−55°C to +175°C), and RoHS/halogen-free compliance for high-reliability PCB assembly.
Technical Context
The 1V5KE33A operates as a silicon avalanche diode with glass-passivated junction, delivering fast response time (<1 ns) and low incremental surge resistance to limit transient overvoltage before downstream ICs are damaged. Its unidirectional configuration provides asymmetric protection-blocking reverse conduction above VRWM while clamping positive transients to ≤45.7V.
Designed for single-pulse 10/1000μs waveform compliance per IEC 61000-4-5, the device sustains 33A peak pulse current without degradation when mounted with 0.375" lead length at 75°C ambient. Thermal derating follows JEDEC-standard curves, maintaining 1500W capability only within specified pulse width and temperature limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (1ms) | 1500W - sustains single lightning-surge energy without failure |
| Breakdown Voltage VBR | 31.4–34.7V @ 1mA - defines minimum voltage at which avalanche conduction begins |
| Clamping Voltage VC | 45.7V @ 33A IPPM - maximum voltage seen by protected circuit during worst-case surge |
| Reverse Stand-off Voltage VRWM | 28.2V - maximum continuous DC or RMS voltage applied without significant leakage |
| Leakage Current IR | <5μA @ 28.2V - ensures minimal standby power loss in always-on systems |
| Junction Temperature Range | −55°C to +175°C - supports operation in under-hood automotive and industrial environments |
| Package | DO-201 - industry-standard axial-leaded through-hole package with UL 94V-0 molding compound |
Pinout & Package
DO-201 package: axial-leaded, cylindrical body with cathode band marking for unidirectional polarity. Leads are pure tin-plated, solderable per J-STD-002, and meet JESD 201 Class 2 whisker resistance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line (e.g., 24V rail); marked by band; conducts during positive transients |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR over lifetime and humidity exposure, critical for outdoor-rated equipment |
| 1500W peak pulse rating | Meets IEC 61000-4-5 Level 4 (4kV surge) for industrial power inputs without external series impedance |
| Low clamping ratio (VC/VBR ≈ 1.4) | Minimizes overvoltage stress on downstream MOSFETs or controllers during surge events |
| RoHS & halogen-free | Complies with IPC-J-STD-609 and IEC 61249-2-21 for environmentally regulated manufacturing |
Applications
| Industrial Motor Drives | AC/DC Power Supplies |
|---|---|
Use Scenario: Protection of gate driver ICs and bootstrap circuits against inductive kickback from IGBTs/MOSFETs during switching. IC Role / Device Role: Unidirectional TVS placed between high-side gate and source, clamping positive spikes to ≤45.7V. Use Value: Prevents gate oxide rupture in 600V SiC drivers by limiting transient voltage below absolute maximum rating. | Use Scenario: Input-stage surge suppression on primary-side rectifier outputs subjected to lightning-induced line surges. IC Role / Device Role: Parallel-connected TVS across bulk capacitor input to clamp 10/1000μs transients before they reach PWM controller. Use Value: Enables compliance with EN 61000-4-5 Level 4 without increasing transformer creepage or adding MOVs. |
| Programmable Logic Controllers | Building Automation Sensors |
Use Scenario: Protection of 24V DC input terminals exposed to field wiring faults and electrostatic discharge. IC Role / Device Role: Unidirectional TVS installed at connector entry point, anode grounded, cathode tied to 24V rail. Use Value: Limits transient voltage to 45.7V, preserving integrity of isolated DC/DC converters and microcontroller LDOs. | Use Scenario: ESD protection on RS-485 bus lines in HVAC control networks with long cable runs. IC Role / Device Role: TVS placed on A/B differential pair, referenced to local ground, suppressing ±8kV contact ESD per IEC 61000-4-2. Use Value: Maintains signal integrity below 100pF total capacitance (measured at 1MHz), avoiding data corruption at 10Mbps. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A | Same 33V VBR range but SMB package (surface-mount); 600W rating vs. 1500W | Lower power handling limits use to sub-20A surge environments; requires PCB layout change | Select when board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 2 |
| P6KE33A | Same DO-201 package and 1500W rating, but older JEDEC standard; VBR min 31.5V, VC 49.9V @ 30A | Higher clamping voltage increases stress on protected ICs; not halogen-free | Acceptable for legacy designs where halogen-free compliance is not required |
Compared with SMBJ33A and P6KE33A, the 1V5KE33A delivers superior clamping performance (45.7V vs. ≥49.9V), full halogen-free compliance, and identical DO-201 footprint-making it optimal for new industrial designs requiring Level 4 surge immunity and environmental certification.
Availability
1V5KE33A is available at Aetrix Electronics and suitable for industrial motor drives, AC/DC power supplies, and programmable logic controllers requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1V5KE33A 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, and power MOSFETs since 1979.
The 1V5KExxA series was developed specifically for high-energy transient suppression in industrial power conversion and automation systems, emphasizing robustness, consistency, and regulatory compliance across global markets.
FAQ
What is the maximum clamping voltage of the 1V5KE33A under standard test conditions?
The 1V5KE33A has a maximum clamping voltage (VC) of 45.7V at 33A peak pulse current (IPPM) with a 10/1000μs waveform, measured per JEDEC standards. This value is guaranteed across the full operating temperature range and represents the highest voltage the protected circuit will experience during a defined surge event. The 1V5KE33A maintains this clamping performance due to its low incremental surge resistance and glass-passivated junction design.
Is the 1V5KE33A suitable for bidirectional transient protection?
No, the 1V5KE33A is a unidirectional TVS diode and is not rated for bidirectional operation. For bidirectional protection, Taiwan Semiconductor offers the 1V5KE33CA variant, which features symmetrical breakdown in both polarities. Using the 1V5KE33A in reverse-biased configurations may result in premature failure or undefined clamping behavior. Always verify polarity marking (cathode band) during PCB layout for the 1V5KE33A.
What is the reverse leakage current specification for the 1V5KE33A at its rated VRWM?
At its reverse stand-off voltage (VRWM) of 28.2V and ambient temperature of 25°C, the 1V5KE33A exhibits a maximum reverse leakage current (IR) of 5μA. This low leakage ensures minimal power loss in always-on applications such as PLC input stages or sensor bias networks. Leakage remains below 10μA up to 125°C junction temperature, supporting reliable operation in thermally demanding enclosures.
Does the 1V5KE33A meet RoHS and halogen-free requirements?
Yes, the 1V5KE33A is fully RoHS compliant and halogen-free per IEC 61249-2-21. Its molding compound contains no brominated flame retardants or chlorine-based additives, and lead content is below 1000 ppm. This makes the 1V5KE33A suitable for export to EU, Japan, and other regions with strict environmental regulations, and compatible with lead-free reflow and wave soldering processes.
What is the thermal derating behavior of the 1V5KE33A above 75°C ambient temperature?
The 1V5KE33A's steady-state power dissipation derates linearly from 5W at 75°C ambient to zero at 175°C junction temperature, per Figure 5 in the datasheet. For pulsed operation, peak pulse power remains at 1500W only for pulses ≤1ms at 25°C; longer pulses or elevated ambient require reduction per the pulse derating curve (Figure 2). Proper heatsinking and lead length (0.375") are essential to maintain thermal limits in high-power applications.
1V5KE33A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AD, Axial
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 45.7V
- Current - Peak Pulse (10/1000µs):
- 33A
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201AD
1V5KE33A FAQ
1.How can I place an order for 1V5KE33A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1V5KE33A 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 1V5KE33A reliable?
The price and inventory of 1V5KE33A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1V5KE33A is usually 5 days.
3.What payment methods are accepted for 1V5KE33A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1V5KE33A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1V5KE33A?
1V5KE33A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1V5KE33A 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 1V5KE33A?
For technical support, including 1V5KE33A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1V5KE33A requirements.
6.How does Aetrix verify that 1V5KE33A is sourced from the original manufacturer or authorized distributors?
All 1V5KE33A 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 1V5KE33A meets industry standards.
7.What is the process for return or replacement of 1V5KE33A?
All 1V5KE33A units undergo pre-shipment inspection (PSI). If there is an issue with 1V5KE33A, 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 1V5KE33A part is unused and in its original packaging.
Return procedure for 1V5KE33A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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