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STMicroelectronics 1.5KE39ARL
- Part No.:
- 1.5KE39ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE39ARL.pdf
- Description:
- TVS DIODE 33.3VWM 69.7VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:8,800
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Product details
Overview
1.5KE39ARL from STMicroelectronics is a unidirectional 1500 W transient voltage suppression diode in DO-201 package, designed for clamping ESD and surge events up to 30 kV (IEC 61000-4-2) and 4 kV (IEC 61000-4-4). It features a 39 V breakdown voltage (VBR = 33.3–41 V), 53.9 V clamping voltage at 28 A (10/1000 µs), and operates from –55 °C to +175 °C - deployed in industrial power supplies and telecom interface protection.
For engineers reviewing the 1.5KE39ARL datasheet, 1.5KE39ARL pinout, 1.5KE39ARL application, or 1.5KE39ARL equivalent, this part delivers verified high-temperature surge immunity, low dynamic resistance (0.461 Ω), and UL 497B-certified protection for AC/DC front-end and DC bus lines requiring robust overvoltage resilience.
Technical Context
The 1.5KE39ARL uses planar junction technology to achieve stable VBR temperature coefficient (αT = 10.0 × 10−4/°C) and low leakage (<1 µA at 31.5 V). Its unidirectional configuration enables precise anode-cathode polarity control in DC-biased protection paths.
It sustains 1500 W peak pulse power (10/1000 µs) at Tj = 25 °C and retains 1100 W capability at Tj = 175 °C, with clamping performance validated under IEC 61000-4-4 level 4 (4 kV) and IEC 61000-4-2 level 4 (30 kV contact/air discharge).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VBR (min/typ/max) | 33.3 V / 37.1 V / 41 V - ensures reliable turn-on before system-level damage at nominal 39 V standoff |
| VCL @ IPP = 28 A | 53.9 V - limits downstream voltage stress during 10/1000 µs surges in 24–48 V DC systems |
| RD (dynamic resistance) | 0.461 Ω - minimizes voltage overshoot under fast-rising transients (e.g., lightning-induced spikes) |
| PPP (10/1000 µs) | 1500 W - supports single-event surge handling in industrial SMPS input stages |
| Tj operating range | –55 °C to +175 °C - enables deployment in under-hood automotive ECUs and high-temp industrial controllers |
| ESD immunity | ±30 kV (contact/air, IEC 61000-4-2) - exceeds level 4 for human-body-model robustness in field-serviceable ports |
Pinout & Package
1.5KE39ARL 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 matte tin-plated leads compliant with J-STD-002 and MIL-STD-750.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Current entry point in forward bias; connected to protected line ground or low-side reference | Enables unidirectional clamping only when reverse-biased - must be placed with correct polarity relative to DC rail |
| Cathode (banded end) | Current exit point in forward bias; connected to protected circuit's positive rail or signal line | Defines clamping direction: conducts when cathode voltage exceeds anode by ≥VBR, diverting surge to ground |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature surge rating | 1100 W (10/1000 µs) at Tj = 175 °C - maintains protection margin in thermally constrained enclosures |
| Low dynamic resistance | 0.461 Ω - reduces clamping voltage rise under high di/dt, critical for fast-edge transients |
| UL 497B certification | QVGQ2.E136224 - validates suitability for telecom/data line surge protection per safety standards |
| MSL Level 1 rating | J-STD-020 compliant - allows unlimited floor life and reflow without baking preconditioning |
| Whisker-resistant plating | JESD-201 Class 2 - prevents tin whisker growth in long-life industrial deployments |
Applications
| Industrial Power Supply Input Protection | Telecom Line Interface Protection |
|---|---|
Use Scenario: 48 V DC input stage of programmable logic controller (PLC) power module exposed to load-dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS diode placed between DC+ and chassis ground to clamp surges before they reach upstream rectifier and bulk capacitor. Use Value: Limits peak voltage to ≤53.9 V during 28 A 10/1000 µs events, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. |
Use Scenario: RS-485 data line termination in outdoor base station equipment subject to lightning-induced common-mode surges. IC Role / Device Role / Timing Role: Paired unidirectional TVS on each differential line (A/GND and B/GND) to suppress asymmetrical transients while preserving signal integrity. Use Value: Clamps 4 kV IEC 61000-4-4 surges within 1 ns response time, maintaining <100 ps skew between channels and avoiding receiver latch-up. |
| Automotive Body Control Module (BCM) | AC-DC Adapter Surge Suppression |
Use Scenario: 12 V battery feed line in BCM housing, subjected to ISO 7637-2 pulse 1 (inductive kick) and pulse 5a (load dump). IC Role / Device Role / Timing Role: Primary clamping device across battery input and ground, coordinated with upstream fuse and secondary LC filter. Use Value: Absorbs 1500 W peak energy without thermal runaway at 175 °C junction temperature, meeting AEC-Q101 reliability requirements. |
Use Scenario: Secondary-side output of universal-input AC-DC adapter (12 V/3 A), protecting USB-C PD port against user-induced ESD. IC Role / Device Role / Timing Role: Final-stage TVS on VBUS line, positioned after DC-DC converter and before connector to limit residual transients. Use Value: Withstands ±30 kV air/contact discharge per IEC 61000-4-2, eliminating need for external spark gaps or multi-stage protection. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A (Diodes Inc.) | Lower PPP (600 W), higher VCL (58.1 V @ 10.3 A), SMB package (smaller footprint, lower thermal mass) | Not suitable for 1500 W surge events; limited to low-energy interfaces like USB or sensor lines | Select when board space is constrained and surge threat level is ≤600 W (e.g., consumer electronics). |
| 1N6277A (ON Semiconductor) | Same DO-201 package, identical 39 V VBR, but lower IEC 61000-4-2 rating (±25 kV) and no UL 497B listing | Lacks telecom safety certification; requires additional system-level validation for regulated infrastructure | Choose only for cost-sensitive industrial designs where UL compliance is not mandated. |
Compared with SMBJ36A and 1N6277A, the 1.5KE39ARL uniquely combines 1500 W surge capacity, UL 497B certification, and 175 °C operation - making it the only option qualified for high-reliability 48 V DC power rails in telecom and transportation systems.
Availability
1.5KE39ARL is available at Aetrix Electronics and suitable for industrial power supply input protection, telecom line interface protection, automotive body control modules, and AC-DC adapter surge suppression requiring stable component supply across extended temperature and high-surge environments.
Supply support for 1.5KE39ARL 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, specializing in power management, analog, MEMS, and microcontrollers for industrial, automotive, and consumer markets.
The 1.5KE series belongs to ST's high-power TVS portfolio, engineered specifically for robust front-end surge protection in harsh-environment power conversion and communication systems.
FAQ
What is the maximum clamping voltage of 1.5KE39ARL under a 10/1000 µs surge?
The maximum clamping voltage (VCL) is 53.9 V at 28 A peak pulse current (IPP) for a 10/1000 µs waveform. This value is measured at Tamb = 25 °C and defines the upper voltage limit imposed on protected circuitry during standardized surge testing.
Can 1.5KE39ARL be used in bidirectional signal lines?
No - 1.5KE39ARL is unidirectional (denoted by "A" suffix) and conducts only when cathode voltage exceeds anode voltage by ≥VBR. For bidirectional protection (e.g., RS-485), the 1.5KE39CA variant must be used, which has symmetrical clamping in both polarities.
Is lead-free reflow compatible with the DO-201 package of 1.5KE39ARL?
Yes - the device supports standard Pb-free reflow per J-STD-020 MSL Level 1, with peak temperature up to 245 °C for 20–30 seconds. The recommended profile includes ramp rates ≤3 °C/s and a 60-second liquidus duration, as specified in DS0636 Rev 5.
How does temperature affect the breakdown voltage of 1.5KE39ARL?
VBR increases linearly with junction temperature at αT = 10.0 × 10−4/°C. At 125 °C, VBR rises by ~1.0 V above its 25 °C value (37.1 V typ), reaching ~38.1 V - a predictable shift used in thermal derating calculations for high-ambient designs.
1.5KE39ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 33.3V
- Voltage - Breakdown (Min):
- 37.1V
- Voltage - Clamping (Max) @ Ipp:
- 69.7V
- Current - Peak Pulse (10/1000µs):
- 143A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 2400pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE39ARL FAQ
1.How can I place an order for 1.5KE39ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE39ARL 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 1.5KE39ARL reliable?
The price and inventory of 1.5KE39ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE39ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE39ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE39ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE39ARL?
1.5KE39ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE39ARL 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 1.5KE39ARL?
For technical support, including 1.5KE39ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE39ARL requirements.
6.How does Aetrix verify that 1.5KE39ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE39ARL 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 1.5KE39ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE39ARL?
All 1.5KE39ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE39ARL, 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 1.5KE39ARL part is unused and in its original packaging.
Return procedure for 1.5KE39ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE39ARL Tags
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