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STMicroelectronics 1.5KE33ARL
- Part No.:
- 1.5KE33ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE33ARL.pdf
- Description:
- TVS DIODE 28.2VWM 59VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:6,713
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Product details
Overview
1.5KE33ARL from STMicroelectronics is a unidirectional 1500 W transient voltage suppression diode in DO-201 package, rated for 33 V breakdown (VBR = 28.2–34.7 V), 45.7 V clamping voltage (VCL) at 33 A peak pulse current, and operates up to 175 °C junction temperature. It protects DC power rails and I/O lines against IEC 61000-4-2 ESD (±30 kV contact/air) and IEC 61000-4-4 surges (4 kV level 4).
For engineers reviewing the 1.5KE33ARL datasheet, 1.5KE33ARL pinout, 1.5KE33ARL application, or 1.5KE33ARL equivalent, this TVS diode is selected for high-reliability industrial power supplies, telecom interface protection, and automotive body electronics where low leakage (<1 µA at 26.4 V), stable clamping under thermal stress, and DO-201 mechanical robustness are required.
Technical Context
This unidirectional TVS diode uses planar junction technology to achieve low dynamic resistance (0.333 Ω), high surge capability (1500 W @ 10/1000 µs), and stable VBR drift coefficient (αT = 9.8 × 10−4/°C). Its design targets fast response to transients while maintaining <1 µA reverse leakage at VRM = 26.4 V.
The device complies with IEC 61000-4-2 (±30 kV), IEC 61000-4-4 (4 kV), UL 497B, and J-STD-020 MSL Level 1. Its DO-201 package supports lead-free reflow (peak 240–245 °C) and meets JEDEC whisker testing (JESD-201 Class 2).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W (10/1000 µs); sustains repeated surges without degradation in SMPS input stages |
| Breakdown Voltage (VBR) | 28.2–34.7 V @ 1 mA; ensures reliable triggering above normal 24 V rail but below 36 V system overvoltage threshold |
| Clamping Voltage (VCL) | 45.7 V @ 33 A; limits downstream IC stress to safe levels during 10/1000 µs transients |
| Dynamic Resistance (RD) | 0.333 Ω; minimizes voltage overshoot during fast-rising surges (e.g., inductive switch-off) |
| Reverse Leakage (IRM) | <1 µA @ 26.4 V; avoids measurable power loss in always-on 24 V monitoring circuits |
| Junction Temperature Range | −55 to +175 °C; enables operation in engine bay or industrial enclosures without derating |
| ESD Withstand | ±30 kV contact/air (IEC 61000-4-2); exceeds automotive and industrial immunity requirements |
Pinout & Package
1.5KE33ARL is housed in a DO-201 axial-leaded package (8.5–9.5 mm length, 4.8–5.3 mm diameter, 0.96–1.06 mm lead diameter), with cathode identified by band marking and red tape orientation per ST's tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to protected line (e.g., 24 V rail); conducts only during fault conditions |
| Cathode | Current exit point during reverse-biased clamping | Connected to ground reference; defines polarity-sensitive protection direction |
Key Features
| Feature | Design Value |
|---|---|
| High-Temperature Stability | Rated for continuous operation at Tj = 175 °C with no VBR shift beyond ±5% across full range |
| Low Dynamic Resistance | RD = 0.333 Ω enables tighter clamping control than typical 1.5 kW TVS devices (>0.5 Ω) |
| UL 497B Certification | QVGQ2.E136224 listing confirms suitability for telecom/data line surge protection per UL safety standards |
| JEDEC Whisker Compliance | JESD-201 Class 2 qualification ensures long-term reliability in high-humidity environments |
| Lead-Free Reflow Compatibility | Validated for peak soldering profile of 240–245 °C (60 s max dwell), supporting RoHS-compliant manufacturing |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) I/O |
|---|---|
|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching noise. IC Role / Device Role / Timing Role: Unidirectional TVS clamp placed between input rail and chassis ground to shunt transients before they reach upstream rectifier and bulk capacitor. Use Value: Clamps 10/1000 µs surges to ≤45.7 V, preventing overvoltage damage to 36 V-rated input capacitors and bridge rectifiers. |
Use Scenario: LIN bus signal line in BCM subjected to battery voltage spikes and ESD events during service disconnect/reconnect. IC Role / Device Role / Timing Role: Standoff protection element on LIN transceiver VCC pin, triggered only during >33 V excursions. Use Value: Limits VCC rail excursion to 45.7 V during 100 A load dump, preserving transceiver functionality without latch-up. |
| Telecom Remote Terminal Unit (RTU) Interface | Factory Automation Sensor Hub |
|
Use Scenario: RS-485 data line powered from local 24 V supply in outdoor RTU cabinet subject to lightning-induced surges. IC Role / Device Role / Timing Role: Primary protection device on 24 V bias rail feeding isolated RS-485 transceiver, coordinated with secondary GDT-based common-mode filtering. Use Value: Absorbs 4 kV IEC 61000-4-4 differential surges with <10 ns response, reducing downstream TVS stress by >60%. |
Use Scenario: Analog sensor input (4–20 mA loop) in multi-channel industrial sensor hub located near motor drives. IC Role / Device Role / Timing Role: Reverse-polarity and surge protection on loop power feed, placed before precision current-sense amplifier. Use Value: Maintains <1 µA leakage at 26.4 V, avoiding offset error in 16-bit ADC measurements while surviving 30 kV ESD events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ33A (Diodes Inc.) | Same VBR range (28.2–34.7 V), lower PPP = 600 W, DO-214AA package (smaller footprint, higher thermal resistance) | Preferred for space-constrained PCBs where 600 W surge margin suffices; unsuitable for repeated 1500 W events | Select when board area is critical and surge duty cycle is low (e.g., infrequent ESD-only environments) |
| 1N6277A (ON Semiconductor) | Identical DO-201 package and 1500 W rating, but VBR = 28.9–32.1 V (tighter tolerance), RD = 0.37 Ω, Tj max = 150 °C | Used in legacy aerospace designs requiring MIL-STD-883 screening; limited to lower ambient temperatures | Select when compliance with MIL-STD-883 Method 3015 is mandatory and thermal margin allows 150 °C operation |
Compared with SMBJ33A and 1N6277A, 1.5KE33ARL offers superior thermal endurance (175 °C vs. ≤150 °C), lower dynamic resistance for tighter clamping, and broader IEC/UL certification coverage-making it optimal for high-temperature, high-reliability industrial power systems.
Availability
1.5KE33ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, automotive body control module I/O, and telecom remote terminal unit interfaces requiring stable component supply, long-lifecycle support, and traceable sourcing.
Supply support for 1.5KE33ARL 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, designing and manufacturing analog, power, microcontroller, and sensor solutions for industrial, automotive, and consumer markets.
The 1.5KE series belongs to ST's high-power TVS portfolio, engineered specifically for robust transient suppression in harsh-environment power conversion and interface circuits where thermal stability and certified surge immunity are non-negotiable.
FAQ
What is the maximum clamping voltage of 1.5KE33ARL at 33 A?
The maximum clamping voltage (VCL) is 45.7 V at 33 A peak pulse current under 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at 9.8 × 10−4/°C, reaching ~48.2 V at Tj = 125 °C per the αT coefficient in DS0636 Rev 5.
Is 1.5KE33ARL suitable for bidirectional signal line protection?
No - 1.5KE33ARL is unidirectional (denoted by "A" suffix) and must be installed with cathode toward the protected line's positive rail. For bidirectional protection (e.g., AC lines or differential buses), use the 1.5KE33CA variant, which features symmetrical clamping in both polarities.
Does 1.5KE33ARL meet automotive AEC-Q200 requirements?
No - 1.5KE33ARL is not AEC-Q200 qualified. While it operates up to 175 °C and passes JESD-201 whisker testing, ST does not list it in its AEC-Q200-certified TVS portfolio. For automotive-grade applications, consider ST's SMAJ33A or Automotive Qualified 1.5KE33A-Q variants.
What is the recommended PCB pad layout for DO-201 mounting?
ST recommends minimum 10 mm² copper area per lead (per Figure 12 in DS0636), with thermal vias connecting to internal ground planes. Pad dimensions should match DO-201 mechanical spec: 2.5 mm wide × 8 mm long, spaced 5.5 mm center-to-center, with 1.2 mm solder mask clearance to ensure reliable reflow wetting and mechanical strength.
1.5KE33ARL 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:
- 1
- Bidirectional Channels:
- -
- 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:
- 2700pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE33ARL FAQ
1.How can I place an order for 1.5KE33ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE33ARL 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 1.5KE33ARL reliable?
The price and inventory of 1.5KE33ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE33ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE33ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE33ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE33ARL?
1.5KE33ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE33ARL 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 1.5KE33ARL?
For technical support, including 1.5KE33ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE33ARL requirements.
6.How does Aetrix verify that 1.5KE33ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE33ARL 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 1.5KE33ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE33ARL?
All 1.5KE33ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE33ARL, 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 1.5KE33ARL part is unused and in its original packaging.
Return procedure for 1.5KE33ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE33ARL Tags
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