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STMicroelectronics 1.5KE33CARL
- Part No.:
- 1.5KE33CARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33CARL.pdf
- Description:
- TVS DIODE 28.2VWM 59VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,617
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Product details
Overview
1.5KE33CARL from STMicroelectronics is a bidirectional transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge protection with 33 V standoff voltage (VRWM), 45.7 V clamping voltage (VCL) at 33 A peak pulse current, and 1500 W peak pulse power (10/1000 µs). It operates up to 175 °C junction temperature and meets IEC 61000-4-2 level 4 (±30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV), protecting power rails and data lines in industrial power supplies.
For engineers reviewing the 1.5KE33CARL datasheet, 1.5KE33CARL pinout, 1.5KE33CARL application, or 1.5KE33CARL equivalent, key selection criteria include bidirectional clamping behavior, low dynamic resistance (0.144 Ω), high Tj capability (175 °C), and DO-201 mechanical compatibility with legacy through-hole layouts.
Technical Context
This TVS diode uses planar silicon junction technology to achieve low leakage (<1 µA at 28.2 V), stable VBR drift coefficient (αT = 9.8 × 10−4/°C), and robust thermal performance up to 175 °C. Its unidirectional/bidirectional variants share identical package and surge ratings but differ in polarity configuration and tape orientation (red/white vs. red/red).
The device delivers 1500 W (10/1000 µs) and up to 10 kW (8/20 µs) peak pulse power, with clamping voltage tightly controlled via dynamic resistance (RD = 0.144 Ω) to limit voltage overshoot during fast transients. It complies with UL 497B, IEC 61000-4-2/4-4, and J-STD-020 MSL Level 1.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 33 V - Maximum continuous reverse working voltage before breakdown begins |
| Breakdown Voltage (VBR) | 31.4–34.7 V at 1 mA - Confirmed voltage range where avalanche conduction initiates reliably |
| Clamping Voltage (VCL) | 45.7 V at 33 A (10/1000 µs) - Peak voltage seen by protected circuit under rated surge |
| Peak Pulse Power (PPP) | 1500 W (10/1000 µs) - Sustained surge energy handling capacity at ambient temperature |
| Dynamic Resistance (RD) | 0.144 Ω - Low impedance during clamping ensures minimal voltage rise per amp of surge current |
| Junction Temperature Range | −55 °C to +175 °C - Enables operation in high-ambient environments like motor drives and industrial SMPS |
| ESD Withstand (IEC 61000-4-2) | ±30 kV contact & air discharge - Exceeds level 4, eliminating need for external ESD staging in many front-end designs |
Pinout & Package
1.5KE33CARL is housed in a DO-201 axial-leaded package (8.5–9.5 mm body length, 4.8–5.3 mm diameter, 0.96–1.06 mm lead diameter), with cathode marked by band on one end. As a bidirectional TVS, it has no polarity-dependent pinout - both leads are electrically symmetric and interchangeable in circuit placement.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode/Cathode (symmetrical) | Surge current path | Both terminals conduct identically during positive/negative transients; no directional installation required |
| Leads (axial) | Thermal and electrical interface | Matte tin-plated copper leads support 260 °C soldering (10 s) and provide low-inductance path to PCB ground/power planes |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional clamping | Enables single-device protection of AC lines or floating DC buses without polarity constraints |
| High Tj rating (175 °C) | Supports reliable operation in thermally constrained enclosures such as enclosed power supplies and motor controllers |
| Low dynamic resistance (0.144 Ω) | Reduces clamping voltage rise under high-current surges, improving margin for downstream ICs |
| UL 497B certified | Validates suitability for telecom/data line surge protection per safety-critical infrastructure standards |
| IEC 61000-4-2 level 4 compliance | Eliminates need for pre-filtering stages in industrial HMI and sensor interface designs |
Applications
| Industrial Power Supply Input Protection | AC Motor Drive DC Bus Clamping |
|---|---|
Use Scenario: Protecting rectified AC input stage of 24–48 V industrial SMPS against lightning-induced surges and load dump events. IC Role / Device Role / Timing Role: Bidirectional TVS placed across bulk capacitor to clamp differential-mode transients before they reach PWM controller and MOSFETs. Use Value: 45.7 V clamping at 33 A prevents overvoltage stress on 63 V-rated electrolytics and enables use of lower-voltage-rated switching FETs. | Use Scenario: Suppressing regenerative voltage spikes on DC bus during rapid deceleration of 3-phase AC induction motors. IC Role / Device Role / Timing Role: Mounted directly across bus capacitors to absorb stored kinetic energy returned from motor windings. Use Value: 1500 W (10/1000 µs) rating handles repetitive 10–100 ms spikes without degradation, extending capacitor lifetime. |
| Telecom Line Interface Protection | Programmable Logic Controller (PLC) Digital I/O Protection |
Use Scenario: Safeguarding RS-485 transceivers and isolation transformers connected to outdoor field wiring exposed to induced surges. IC Role / Device Role / Timing Role: Placed on transformer secondary side to clamp common-mode transients before signal conditioning circuitry. Use Value: ±30 kV ESD immunity (IEC 61000-4-2) and 4 kV burst immunity (IEC 61000-4-4) meet EN 55032/55035 requirements for Class A equipment. | Use Scenario: Shielding 24 V digital input modules from inductive kickback when interfacing with solenoids, relays, and proximity sensors. IC Role / Device Role / Timing Role: Connected between input terminal and PLC ground to shunt fast-rising transients generated by coil de-energization. Use Value: 175 °C operating junction temperature ensures stability during extended runtime in sealed control cabinets with ambient >70 °C. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33CA | DO-214AA (SMB) package, 33 V VRWM, 53.3 V VCL @ 27.1 A, 600 W PPP | Lower power rating and higher clamping voltage; suited for space-constrained PCBs with moderate surge exposure | Select when board area is limited and peak surge energy is <600 W (10/1000 µs) |
| 1N6287 | DO-201 package, 33 V VRWM, 49.9 V VCL @ 30 A, 1500 W PPP, αT = 10.0 × 10−4/°C | Nearly identical electrical specs but different manufacturer qualification and UL file (E136224 vs. E128227) | Select when requiring alternate sourcing with same mechanical fit and thermal derating curve |
Compared with SMBJ33CA and 1N6287, 1.5KE33CARL offers the lowest clamping voltage (45.7 V) among DO-201 33 V bidirectional TVS diodes and is uniquely qualified to UL 497B for telecom surge protection-critical for certified industrial gateways.
Availability
1.5KE33CARL is available at Aetrix Electronics and suitable for industrial power supply input protection, AC motor drive DC bus clamping, and telecom line interface protection requiring stable component supply and long-term lifecycle continuity.
Supply support for 1.5KE33CARL 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, delivering intelligent power, analog, MEMS, and microcontroller solutions for automotive, industrial, and consumer markets.
The 1.5KE series belongs to ST's high-power TVS portfolio, engineered specifically for robust, high-temperature surge protection in industrial power conversion, motor control, and infrastructure communication systems.
FAQ
What is the difference between 1.5KE33A and 1.5KE33CARL?
1.5KE33A is unidirectional (anode/cathode polarity matters), while 1.5KE33CARL is bidirectional (symmetrical conduction). Both share identical DO-201 packaging, 33 V standoff, and 1500 W surge rating, but CA versions protect AC or floating DC signals without polarity concerns and use dual-red tape marking.
Can 1.5KE33CARL be used in surface-mount designs?
No-it is strictly a through-hole DO-201 axial package with 25.4 mm lead spacing and 8.5–9.5 mm body length. For SMT equivalents, consider SMBJ33CA (DO-214AA) or SMCJ33CA (DO-214AB), which offer similar voltage ratings but lower peak power (600 W and 1500 W respectively).
Does 1.5KE33CARL require derating above 25 °C ambient?
Yes-peak pulse power must be linearly derated above 25 °C using the curve in Figure 3 of DS0636. At 100 °C ambient, maximum PPP drops to ~1100 W (10/1000 µs); full 1500 W is only guaranteed at Tamb ≤ 25 °C with proper PCB copper area per Figure 12.
Is 1.5KE33CARL RoHS and REACH compliant?
Yes-ST certifies all 1.5KE devices as RoHS-compliant (Pb-free matte tin lead finish) and REACH-conformant per ECOPACK2 specifications. Full material declarations and test reports are available via ST's Quality Portal using order code 1.5KE33CARL.
1.5KE33CARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 28.2V
- Voltage - Breakdown (Min):
- 31.4V
- Voltage - Clamping (Max) @ Ipp:
- 59V
- Current - Peak Pulse (10/1000µs):
- 169A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1350pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE33CARL FAQ
1.How can I place an order for 1.5KE33CARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33CARL 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 1.5KE33CARL reliable?
The price and inventory of 1.5KE33CARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33CARL is usually 5 days.
3.What payment methods are accepted for 1.5KE33CARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33CARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33CARL?
1.5KE33CARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33CARL 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 1.5KE33CARL?
For technical support, including 1.5KE33CARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33CARL requirements.
6.How does Aetrix verify that 1.5KE33CARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE33CARL 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 1.5KE33CARL meets industry standards.
7.What is the process for return or replacement of 1.5KE33CARL?
All 1.5KE33CARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33CARL, 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 1.5KE33CARL part is unused and in its original packaging.
Return procedure for 1.5KE33CARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33CARL Tags
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ESD9B5.0ST5G
onsemi
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DESD3V3E1BL-7B
Diodes Incorporated
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ESD5Z3.3T1G
onsemi
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D5V0H1B2LP-7B
Diodes Incorporated
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D5V0P1B2LP-7B
Diodes Incorporated
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DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
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D5V0L1B2WS-7
Diodes Incorporated
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