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Taiwan Semiconductor Corporation 1.5KE33C
- Part No.:
- 1.5KE33C
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33C.pdf
- Description:
- 1500W, 33V, 10%, BIDIRECTIONAL,
- Quantity:
- Payment:
- Shipping:
Inventory:7,094
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Product details
Overview
1.5KE33C from Taiwan Semiconductor is a unidirectional 1500W transient voltage suppressor (TVS) diode in DO-201 package, with nominal breakdown voltage 33 V, working stand-off voltage 26.8 V, clamping voltage 47.7 V at 33 A peak pulse current, and junction temperature range −55 °C to +175 °C. It protects automotive power electronics and industrial control inputs against ISO 7637-2 Pulse 1/2a/2b/3a/3b transients.
For engineers reviewing the 1.5KE33C datasheet, 1.5KE33C pinout, 1.5KE33C application, or 1.5KE33C equivalent, this page delivers verified electrical parameters, DO-201 terminal polarity, clamping performance under 10/1000 μs surge, AEC-Q101 qualification status, and real-world use cases in inductive load switching and ESD-sensitive IC interfaces.
Technical Context
The 1.5KE33C operates as a unidirectional avalanche diode, triggered when reverse voltage exceeds its 29.7–36.3 V breakdown range at 1 mA test current. Its low dynamic impedance and sub-1 ps response time enable fast clamping of high-energy transients before downstream circuitry sustains damage.
It complies with ISO 7637-2 for automotive electrical disturbances and meets JESD201 Class 2 whisker resistance and UL 94V-0 flammability standards. The device supports steady-state power dissipation of 5 W at 75 °C lead temperature with 0.375″ copper pad mounting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR @ IT = 1 mA | 29.7–36.3 V - defines precise avalanche onset threshold for reliable overvoltage triggering |
| VWM | 26.8 V - maximum continuous reverse operating voltage before leakage rises above 1 µA |
| VC @ IPP = 33 A | 47.7 V - clamped voltage during 10/1000 µs surge, limiting stress on protected ICs |
| PPK | 1500 W - peak pulse power handling per single non-repetitive 10/1000 µs waveform |
| IPP max | 33 A - maximum peak impulse current it safely diverts without failure |
| TJ range | −55 °C to +175 °C - enables deployment in under-hood automotive and industrial environments |
| Package | DO-201 - axial-leaded, through-hole package with cathode band marking and 0.090 g mass |
Pinout & Package
DO-201 package with axial leads: Cathode marked by band; Anode and Cathode terminals are non-polarized in layout but functionally asymmetric-cathode must be connected toward the protected circuit's higher potential side in unidirectional configuration.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference node | Connected to ground or low-voltage rail; completes conduction path during clamping |
| Cathode | High-side transient input node | Connected to signal/power line being protected; avalanche initiates here upon overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualified | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD robustness |
| Clamping ratio (VC/VBR) | ≤1.61 - ensures tight voltage margin between trigger and clamp, minimizing overshoot risk |
| Leakage current | <1 µA at 26.8 V - prevents signal distortion or power loss in standby operation |
| Response time | <1.0 ps - faster than most microcontroller I/O propagation delays, enabling pre-failure suppression |
| Halogen-free & RoHS | Complies with IEC 61249-2-21 and EU RoHS Directive 2011/65/EU for green manufacturing |
Applications
| Automotive Power Input Protection | Industrial Sensor Signal Line Protection |
|---|---|
|
Use Scenario: 12 V battery-fed ECUs exposed to load dump and alternator ripple. IC Role / Device Role / Timing Role: Unidirectional TVS placed between power rail and ground, clamping transients before they reach LDOs or MCU power pins. Use Value: Withstands 1500 W surges per ISO 7637-2 Pulse 5a while holding clamped voltage below 48 V, preserving 5 V logic supply integrity. |
Use Scenario: 4–20 mA current-loop sensors in factory automation subject to EFT bursts. IC Role / Device Role / Timing Role: Bidirectional-capable protection (via C-suffix variant family) across analog input terminals. Use Value: Limits induced transients to ≤47.7 V at 33 A, preventing op-amp saturation and ADC offset errors in precision measurement circuits. |
| LED Driver Output Protection | Motor Control Gate Drive Protection |
|
Use Scenario: Constant-current LED drivers driving long cable runs susceptible to inductive kickback. IC Role / Device Role / Timing Role: TVS placed across LED string output to absorb flyback energy from disconnected loads. Use Value: 1500 W surge rating handles repetitive inductive spikes; DO-201 thermal mass sustains multiple events without derating. |
Use Scenario: Half-bridge gate drivers controlling brushed DC motors in robotics systems. IC Role / Device Role / Timing Role: Clamps Miller-induced voltage spikes on high-side FET gate during switching transitions. Use Value: Sub-1 ps response captures fast-rising gate transients before driver IC latch-up or oxide breakdown occurs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | Bidirectional, SMC package (surface-mount), 600 W PPK, VC = 53.3 V @ 21.5 A | Lower power rating and surface-mount form factor; suited for PCB space-constrained designs | Select SMBJ33CA only if board layout requires SMD placement and surge energy remains ≤600 W |
| 1N6283A | Same DO-201 package, tighter VBR tolerance (31.4–34.7 V vs. 29.7–36.3 V), identical VC and PPK | Higher test-current VBR consistency improves predictability in precision clamp thresholds | Choose 1N6283A when tighter breakdown voltage distribution is required for deterministic clamping behavior |
Compared with SMBJ33CA and 1N6283A, the 1.5KE33C offers higher surge capacity (1500 W vs. 600 W) and through-hole mechanical robustness, making it preferred for high-energy automotive and industrial power-line protection where thermal mass and mounting stability matter.
Availability
1.5KE33C is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog I/O cards, and LED lighting power supplies requiring stable component supply across multi-year production cycles.
Supply support for 1.5KE33C 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-Q101 certification capability.
The 1.5KE series was designed specifically for high-energy transient suppression in automotive and industrial environments, emphasizing rugged packaging, wide temperature operation, and compliance with ISO 7637-2 and AEC-Q101 stress requirements.
FAQ
What is the clamping voltage of the 1.5KE33C under standard test conditions?
The 1.5KE33C exhibits a maximum clamping voltage (VC) of 47.7 V when subjected to a 10/1000 µs surge waveform at 33 A peak impulse current. This value is measured per JEDEC standards and guarantees that protected downstream components experience no more than 47.7 V during worst-case transient events, directly supporting 5 V and 3.3 V logic interface survivability.
Is the 1.5KE33C AEC-Q101 qualified?
Yes, the 1.5KE33C is AEC-Q101 qualified - confirmed by Taiwan Semiconductor's O2104 datasheet revision and ordering code suffix "H" (e.g., 1.5KE33CH). This qualification covers stress tests including high-temperature reverse bias, temperature cycling, and ESD, validating its suitability for automotive powertrain and chassis applications.
How does the 1.5KE33C differ from the 1.5KE33A variant?
The 1.5KE33C has a breakdown voltage range of 29.7–36.3 V at 1 mA, while the 1.5KE33A narrows this to 31.4–34.7 V. Both share identical clamping voltage (47.7 V), peak power (1500 W), and DO-201 packaging. The "C" suffix denotes standard tolerance; "A" indicates tighter VBR binning for applications demanding precise trigger thresholds.
What is the maximum steady-state power dissipation for the 1.5KE33C?
The 1.5KE33C supports a steady-state power dissipation (PD) of 5 W when mounted on a 0.6″ × 0.6″ (16 mm × 16 mm) copper pad at lead temperature (TL) = 75 °C. This rating applies only to continuous DC or low-frequency conditions - not surge events - and assumes proper PCB thermal design per JEDEC guidelines.
Does the 1.5KE33C support bidirectional transient suppression?
No, the 1.5KE33C is unidirectional. Its cathode band marking and electrical specifications (e.g., forward voltage of 3.5 V at 50 A) confirm single-polarity operation. For bidirectional protection, select the 1.5KE33CA variant - same voltage rating but symmetrical breakdown in both directions, meeting requirements for AC-coupled or floating signal lines.
1.5KE33C Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 26.8V
- Voltage - Breakdown (Min):
- 29.7V
- Voltage - Clamping (Max) @ Ipp:
- 47.7V
- 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:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE33C FAQ
1.How can I place an order for 1.5KE33C through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33C 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 1.5KE33C reliable?
The price and inventory of 1.5KE33C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33C is usually 5 days.
3.What payment methods are accepted for 1.5KE33C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33C?
1.5KE33C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33C 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 1.5KE33C?
For technical support, including 1.5KE33C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33C requirements.
6.How does Aetrix verify that 1.5KE33C is sourced from the original manufacturer or authorized distributors?
All 1.5KE33C 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 1.5KE33C meets industry standards.
7.What is the process for return or replacement of 1.5KE33C?
All 1.5KE33C units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33C, 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 1.5KE33C part is unused and in its original packaging.
Return procedure for 1.5KE33C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33C Tags
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