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STMicroelectronics 1.5KE150A
- Part No.:
- 1.5KE150A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE150A.pdf
- Description:
- TVS DIODE 128VWM 265VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:1,748
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Product details
Overview
1.5KE150A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode designed for primary-level surge protection in DC power lines and signal interfaces. It delivers 1500 W peak pulse power (10/1000 µs), clamps at 207 V (max) under 7.2 A surge current, and operates up to 175 °C junction temperature-used in industrial power supplies, telecom line cards, and automotive body control modules.
For engineers reviewing the 1.5KE150A datasheet, 1.5KE150A pinout, 1.5KE150A application, or 1.5KE150A equivalent, key selection criteria include standoff voltage (150 V), clamping voltage (207 V max), surge current rating (7.2 A), thermal robustness (Tj = 175 °C), and DO-201 package compatibility with high-reliability PCB layouts.
Technical Context
This unidirectional TVS diode uses planar silicon junction technology optimized for low leakage (<1 µA at VRM = 128 V) and stable clamping performance across temperature. Its dynamic resistance (RD = 6.81 Ω) and voltage temperature coefficient (αT = 10.8 × 10⁻⁴ /°C) enable predictable VCL drift over -55 °C to +175 °C operating range.
The device meets IEC 61000-4-2 level 4 (30 kV air/contact discharge) and IEC 61000-4-4 level 4 (4 kV), supporting robust ESD and EFT immunity in unprotected input stages. Its DO-201 axial package supports manual and automated through-hole assembly with 260 °C lead-soldering tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 128 V min - maximum continuous reverse working voltage before significant leakage |
| Breakdown Voltage (VBR) | 143–158 V at 1 mA - precise avalanche initiation threshold for controlled conduction |
| Clamping Voltage (VCL) | 207 V max at 7.2 A (10/1000 µs) - peak voltage seen by protected circuit during surge |
| Peak Pulse Power | 1500 W (10/1000 µs) - energy-handling capacity for standard lightning/surge waveforms |
| Junction Temperature Range | -55 °C to +175 °C - enables deployment in under-hood automotive or industrial ambient environments |
| Leakage Current (IRM) | ≤1 µA at 128 V - ensures minimal standby power loss in always-on systems |
| Dynamic Resistance (RD) | 6.81 Ω - determines VCL rise slope under increasing surge current (ΔVCL = RD × ΔI) |
Pinout & Package
1.5KE150A 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 indicated by band marking and compatible with IPC/JEDEC J-STD-002 solderability standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected line; conducts during reverse surge when cathode is positive |
| Cathode | Avalanche reference terminal | Marked end; tied to higher-potential rail (e.g., VBUS); defines polarity-sensitive clamping direction |
Key Features
| Feature | Design Value |
|---|---|
| High-temperature operation | Rated for continuous use at Tj = 175 °C - eliminates derating in thermally constrained enclosures |
| Low dynamic resistance | RD = 6.81 Ω - minimizes clamping voltage overshoot under fast-rising transients |
| IEC 61000-4-2 compliance | 30 kV contact/air discharge - exceeds industrial immunity requirements without external filtering |
| Planar junction construction | Enables <1 µA leakage at 128 V - critical for battery-backed or low-power sensor nodes |
| UL 497B certification | QVGQ2.E136224 - validates suitability for telecom and PoE interface protection per safety standards |
Applications
| Industrial Power Supply Input Protection | Telecom Line Card Surge Suppression |
|---|---|
Use Scenario: Protects AC/DC front-end rectifiers and bulk capacitors against induced surges from nearby switching events or lightning coupling. IC Role / Device Role / Timing Role: Unidirectional TVS placed between L/N and earth ground or across DC bus rails to clamp transients before they reach downstream converters. Use Value: Limits peak voltage to 207 V during 7.2 A surge, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. | Use Scenario: Installed on RJ45 Ethernet or analog telephone line inputs to absorb ESD and ring-trip surges in central office equipment. IC Role / Device Role / Timing Role: Primary-level protector ahead of isolation transformers and PHY ICs; handles repetitive 4 kV IEC 61000-4-4 bursts. Use Value: Maintains <1 µA leakage at 128 V standby, avoiding signal integrity degradation on high-impedance analog lines. |
| Automotive Body Control Module (BCM) Inputs | Programmable Logic Controller (PLC) Digital I/O Protection |
Use Scenario: Shields 12 V/24 V sensor inputs (e.g., door latch, rain sensor) from load-dump and ISO 7637-2 pulses in vehicle subsystems. IC Role / Device Role / Timing Role: Mounted directly at connector entry point to shunt surge energy before reaching microcontroller GPIO or signal conditioning op-amps. Use Value: Operates reliably at Tj = 175 °C, surviving under-hood thermal cycling without parameter drift or premature failure. | Use Scenario: Guards 24 V digital input channels against field-wiring faults, relay coil flyback, and electrostatic discharge in factory automation cabinets. IC Role / Device Role / Timing Role: Bidirectional protection not applicable here; unidirectional 1.5KE150A used on sink-input configurations where common returns are grounded. Use Value: Delivers 1500 W pulse handling with 6.81 Ω RD, ensuring clamping stays within PLC input stage safe operating area during 10/1000 µs surges. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ150A | Same VBR (143–158 V) and VCL (207 V), but SMB package (surface-mount), lower IPP (6.5 A vs. 7.2 A) | Requires PCB rework for SMT layout; unsuitable for through-hole legacy designs or high-vibration environments | Select when board space is constrained and thermal management via copper pour is feasible |
| 1N6277A | Legacy DO-201 part with identical electrical specs but obsolete status and no UL 497B or IEC 61000-4-2 level 4 validation | Lacks documented compliance for new industrial certifications; may require requalification in safety-critical systems | Accept only for repair of legacy equipment where documentation traceability is not required |
Compared with SMBJ150A and 1N6277A, 1.5KE150A uniquely combines DO-201 mechanical robustness, full IEC/UL certification, and highest rated IPP (7.2 A) in its voltage class-making it optimal for new designs requiring audit-ready surge protection.
Availability
1.5KE150A is available at Aetrix Electronics and suitable for industrial power supplies, telecom line cards, and automotive body control modules requiring stable component supply and long-term lifecycle assurance.
Supply support for 1.5KE150A 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 primary-side surge immunity in harsh-environment power electronics where reliability, temperature stability, and regulatory compliance are non-negotiable.
FAQ
What is the maximum clamping voltage of 1.5KE150A at 7.2 A?
The maximum clamping voltage (VCL) is 207 V under a 10/1000 µs surge waveform at 7.2 A peak current, measured at 25 °C ambient. This value increases with junction temperature at a rate of 10.8 × 10⁻⁴ /°C, reaching ~225 V at Tj = 175 °C.
Can 1.5KE150A be used in bidirectional protection circuits?
No-1.5KE150A is unidirectional and must be installed with correct polarity (cathode toward higher potential). For bidirectional protection, use the pin-compatible 1.5KE150CA variant, which features symmetrical breakdown in both directions and identical clamping characteristics.
What is the leakage current specification at rated standoff voltage?
At VRM = 128 V and Tamb = 25 °C, the maximum reverse leakage current (IRM) is 1 µA. Leakage rises exponentially with temperature, reaching ~100 µA at Tj = 150 °C, as confirmed by Figure 9 in DS0636 Rev 5.
Is 1.5KE150A compliant with RoHS and REACH regulations?
Yes-1.5KE150A carries STMicroelectronics' ECOPACK2 qualification, meeting RoHS Directive 2011/65/EU and REACH Regulation (EC) No. 1907/2006. Lead finish is matte tin plating, and the device is halogen-free per IEC 61249-2-21.
1.5KE150A Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 128V
- Voltage - Breakdown (Min):
- 143V
- Voltage - Clamping (Max) @ Ipp:
- 265V
- Current - Peak Pulse (10/1000µs):
- 38A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 850pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE150A FAQ
1.How can I place an order for 1.5KE150A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE150A 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 1.5KE150A reliable?
The price and inventory of 1.5KE150A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE150A is usually 5 days.
3.What payment methods are accepted for 1.5KE150A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE150A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE150A?
1.5KE150A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE150A 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 1.5KE150A?
For technical support, including 1.5KE150A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE150A requirements.
6.How does Aetrix verify that 1.5KE150A is sourced from the original manufacturer or authorized distributors?
All 1.5KE150A 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 1.5KE150A meets industry standards.
7.What is the process for return or replacement of 1.5KE150A?
All 1.5KE150A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE150A, 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 1.5KE150A part is unused and in its original packaging.
Return procedure for 1.5KE150A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE150A Tags
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