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STMicroelectronics 1.5KE400ARL
- Part No.:
- 1.5KE400ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE400ARL.pdf
- Description:
- TVS DIODE 342VWM 706VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:33,941
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Product details
Overview
1.5KE400ARL from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge protection in power supply inputs and industrial interfaces. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 548 V (max) under 4 A surge current, and operates up to 175 °C junction temperature-ideal for AC/DC front-end protection in telecom power systems.
For engineers reviewing the 1.5KE400ARL datasheet, 1.5KE400ARL pinout, 1.5KE400ARL application, or 1.5KE400ARL equivalent, key selection criteria include standoff voltage (400 V), clamping voltage (548 V max), surge current rating (4 A @ 10/1000 µs), thermal stability at Tj = 175 °C, and DO-201 mechanical compatibility with high-power PCB layouts.
Technical Context
This unidirectional TVS diode uses planar junction technology to achieve low leakage (<1 µA at VRM = 342 V), stable breakdown voltage (VBR = 342–380 V at 1 mA), and predictable clamping behavior across temperature (αT = 11 × 10⁻⁴ /°C). Its dynamic resistance (RD = 4.0 Ω) ensures consistent voltage limiting during fast transients.
It meets IEC 61000-4-2 (±30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV), supporting robust ESD and EFT immunity in mains-connected equipment. The device is rated for non-repetitive forward surge current up to 200 A (10 ms, Tj initial = 25 °C).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power (10/1000 µs) | 1500 W - sustains single high-energy surges without failure in AC line protection |
| Standoff Voltage (VRM) | 342 V min - blocks normal operating voltage while remaining fully off |
| Breakdown Voltage (VBR) | 342–380 V at 1 mA - precise threshold triggering for reliable overvoltage response |
| Clamping Voltage (VCL) | 548 V max at 4 A - limits downstream voltage stress during surge events |
| Junction Temperature Range | −55 to +175 °C - enables operation in high-ambient industrial environments |
| Leakage Current (IRM) | ≤1 µA at 342 V - minimizes standby power loss in always-on systems |
| Dynamic Resistance (RD) | 4.0 Ω - ensures predictable VCL rise vs. surge current for accurate system margining |
Pinout & Package
1.5KE400ARL 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 JEDEC standard.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry point during forward conduction | Connected to lower-potential side of protected circuit; enables unidirectional clamping |
| Cathode | Current exit point during reverse-biased clamping | Banded end; connected to higher-potential rail (e.g., AC line or DC bus) to shunt surge energy to ground |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV air/contact discharge - eliminates need for external ESD staging in Class 4 designs |
| High junction temperature capability | 175 °C max operating Tj - supports placement near hot components (e.g., rectifiers, transformers) |
| Low dynamic resistance | 4.0 Ω - reduces clamping voltage overshoot under high di/dt transients |
| Matte tin lead finish | Complies with J-STD-002, JESD 22-B102 E3 - ensures solderability and whisker resistance |
| UL 497B recognition | File QVGQ2.E136224 - validates suitability for telecom/data line surge protection per safety standards |
Applications
| AC/DC Power Supply Input Protection | Industrial PLC Analog Input Protection |
|---|---|
Use Scenario: Protects primary-side rectifier and bulk capacitor from lightning-induced surges on 230 VAC mains input. IC Role / Device Role / Timing Role: Unidirectional TVS placed between L/N and earth ground to clamp common-mode transients before they reach bridge rectifier. Use Value: Withstands 1500 W (10/1000 µs) surges and maintains <1 µA leakage at 342 V, preserving efficiency and reliability in continuous operation. | Use Scenario: Shields 4–20 mA current loop analog inputs from field wiring EFT and induced surges in factory automation cabinets. IC Role / Device Role / Timing Role: Mounted across input terminals to divert fast transients (IEC 61000-4-4 level 4) before reaching precision op-amp front-end. Use Value: Clamps to ≤548 V within nanoseconds, preventing op-amp saturation and ADC saturation during 4 kV bursts. |
| Telecom Line Card Surge Protection | Renewable Energy Inverter DC Link Protection |
Use Scenario: Integrated into POTS or DSL line interface cards to meet GR-1089-CORE surge requirements. IC Role / Device Role / Timing Role: Unidirectional TVS on tip/ring lines referenced to chassis ground, coordinated with gas discharge tubes for multi-stage protection. Use Value: Delivers ±30 kV ESD immunity (IEC 61000-4-2) and 4 kV EFT immunity (IEC 61000-4-4), enabling single-device compliance with Telcordia specs. | Use Scenario: Protects high-voltage DC link (up to 600 V) in solar string inverters against switching transients and grid faults. IC Role / Device Role / Timing Role: Placed across DC+ and DC− rails to clamp voltage spikes caused by IGBT turn-off or cable inductance. Use Value: Stable 342–380 V VBR and 548 V VCL ensure safe clamping margin below 600 V rail rating, even at 175 °C ambient. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar unidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ400A | Lower peak power (600 W), smaller SMB package (3.5 × 3.5 mm), VBR = 342–380 V, VCL = 548 V @ 3.7 A | Not suitable for >1 kW surge duty cycles; limited thermal mass for repeated surges | Select when board space is constrained and surge energy is ≤600 W (10/1000 µs) |
| 1N5388B | Same DO-201 package, but Zener-based (not TVS); 400 V nominal, 5 W steady-state only, no surge rating | Cannot handle transient energy-only for voltage regulation, not surge suppression | Avoid as replacement; not functionally equivalent for surge protection |
Compared with SMBJ400A and 1N5388B, 1.5KE400ARL uniquely combines 1500 W surge capability, DO-201 thermal robustness, and verified IEC 61000-4-2/4-4 compliance-making it the only viable choice for high-energy, high-reliability AC/DC front-end protection.
Availability
1.5KE400ARL is available at Aetrix Electronics and suitable for AC/DC power supply input protection, industrial PLC analog input protection, telecom line card surge protection requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE400ARL 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 innovative solutions across automotive, industrial, power, and sensing markets with strong manufacturing and R&D infrastructure.
The 1.5KE series belongs to ST's high-power discrete protection portfolio, engineered specifically for robust, high-energy transient suppression in mains-connected and industrial-grade power systems where reliability under thermal and electrical stress is critical.
FAQ
What is the maximum clamping voltage for 1.5KE400ARL under a 4 A surge?
The maximum clamping voltage (VCL) is 548 V at 4 A for a 10/1000 µs waveform, measured at Tamb = 25 °C. This value increases linearly with junction temperature at αT = 11 × 10⁻⁴ /°C, reaching ~570 V at Tj = 125 °C per the VCL(Tj) formula in DS0636 Rev 5.
Is 1.5KE400ARL bidirectional or unidirectional?
1.5KE400ARL is unidirectional, indicated by the "A" suffix (vs. "CA" for bidirectional). It conducts only in reverse breakdown-cathode must be connected to the higher-potential node-and does not conduct in forward bias beyond typical diode drop.
Can 1.5KE400ARL replace 1.5KE400A in existing designs?
Yes-1.5KE400ARL is the tape-and-reel packaging variant of 1.5KE400A (same electrical specs, DO-201 package, matte tin leads). The "RL" suffix denotes 1900-piece reel packaging; all parametric performance, marking, and thermal characteristics are identical.
Does 1.5KE400ARL meet UL 497B for telecom surge protection?
Yes-it carries UL 497B file number QVGQ2.E136224, certifying compliance for use in telecommunications primary protector applications, including coordination with GDTs and compliance with voltage let-through limits for Type 1/2 protectors.
1.5KE400ARL 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):
- 342V
- Voltage - Breakdown (Min):
- 380V
- Voltage - Clamping (Max) @ Ipp:
- 706V
- Current - Peak Pulse (10/1000µs):
- 14A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 390pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE400ARL FAQ
1.How can I place an order for 1.5KE400ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE400ARL 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 1.5KE400ARL reliable?
The price and inventory of 1.5KE400ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE400ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE400ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE400ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE400ARL?
1.5KE400ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE400ARL 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 1.5KE400ARL?
For technical support, including 1.5KE400ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE400ARL requirements.
6.How does Aetrix verify that 1.5KE400ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE400ARL 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 1.5KE400ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE400ARL?
All 1.5KE400ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE400ARL, 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 1.5KE400ARL part is unused and in its original packaging.
Return procedure for 1.5KE400ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE400ARL Tags
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