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STMicroelectronics 1.5KE6V8A
- Part No.:
- 1.5KE6V8A
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6V8A.pdf
- Description:
- TVS DIODE 5.8VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:1,151
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Product details
Overview
1.5KE6V8A from STMicroelectronics is a unidirectional transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge protection in DC power rails and signal lines. It features a 6.8 V standoff voltage (VRM), 10.5 V clamping voltage at 10 A (VCL), 1500 W peak pulse power (10/1000 µs), and operates up to 175 °C junction temperature-used in industrial power supplies and telecom interface protection.
For engineers reviewing the 1.5KE6V8A datasheet, 1.5KE6V8A pinout, 1.5KE6V8A application, or 1.5KE6V8A equivalent, key selection criteria include clamping voltage margin vs. protected IC VDD, leakage current (<1000 µA at 5.8 V), thermal derating above 25 °C, and IEC 61000-4-2/4-4 compliance for ESD and EFT immunity validation.
Technical Context
The 1.5KE6V8A uses planar junction silicon technology to achieve low dynamic resistance (0.023 Ω) and stable clamping under repetitive surges. Its unidirectional configuration provides cathode-anode polarity control for DC-biased lines, with reverse standoff (VRM = 5.8 V) and breakdown (VBR min = 5.8 V at 1 mA) tightly specified.
Thermal design is enabled by its 175 °C maximum junction temperature and defined thermal resistance profile (junction-to-ambient vs. copper area). The device meets IEC 61000-4-2 level 4 (±30 kV contact/air discharge) and IEC 61000-4-4 level 4 (4 kV), supporting robust front-end protection in harsh EMC environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRM) | 5.8 V - Maximum continuous reverse voltage before significant leakage; sets minimum operating margin below protected rail. |
| Breakdown Voltage (VBR) | 6.45 V (typ) at 1 mA - Confirmed avalanche onset; ensures reliable triggering before downstream component overvoltage. |
| Clamping Voltage (VCL) | 10.5 V at 10 A (10/1000 µs) - Peak voltage seen by protected circuit during surge; defines safe voltage ceiling. |
| Peak Pulse Power | 1500 W (10/1000 µs) - Sustained energy handling capability at room temperature; derates linearly above 25 °C. |
| Leakage Current (IRM) | 1000 µA max at VRM - Low standby loss critical for battery-powered or high-impedance sensing nodes. |
| Junction Temperature Range | –55 °C to +175 °C - Enables deployment in under-hood automotive, industrial motor drives, and outdoor power electronics. |
Pinout & Package
1.5KE6V8A is housed in a DO-201 axial leaded package with two terminals: anode and cathode. Cathode identified by band marking; leads are matte tin-plated for solderability and RoHS compliance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | DC return path / ground reference | Connected to system ground or low-side return; completes conduction path during reverse surge clamp. |
| Cathode | Protected line connection | Connected to the line being protected (e.g., +12 V rail); avalanche conduction occurs from cathode to anode during overvoltage. |
Key Features
| Feature | Design Value |
|---|---|
| IEC 61000-4-2 ESD immunity | ±30 kV air/contact discharge - Eliminates need for external ESD staging in USB, RS-485, and sensor interfaces. |
| Dynamic resistance (RD) | 0.023 Ω - Minimizes voltage overshoot during fast transients; critical for protecting <12 V logic rails. |
| High-temperature operation | 175 °C Tj max - Supports placement near heat sources (e.g., MOSFETs, transformers) without derating penalties. |
| Low leakage at VRM | ≤1000 µA - Preserves efficiency in always-on systems and avoids false triggering in high-impedance bias networks. |
Applications
| Industrial Power Supply Input Protection | Automotive Body Control Module (BCM) CAN Bus Line Protection |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and ISO 7637-2 pulses. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp transients before DC-DC converter input. Use Value: Clamps 1500 W surges to ≤10.5 V, preventing damage to 36 V-rated input capacitors and enabling single-stage protection without series impedance. | Use Scenario: CAN_H/CAN_L lines in BCM subjected to ESD events during connector mating and in-vehicle EFT noise. IC Role / Device Role / Timing Role: Paired 1.5KE6V8A devices (one per line) provide bidirectional-like protection via separate anode-cathode orientation on each differential line. Use Value: Withstands ±30 kV contact discharge per IEC 61000-4-2 while adding <0.5 pF capacitance-no data rate degradation on 500 kbps CAN FD links. |
| Telecom DSL Line Card Surge Protection | Medical Patient Monitor Analog Sensor Interface |
Use Scenario: Tip/ring inputs of ADSL/VDSL line card exposed to lightning-induced surges on outside plant wiring. IC Role / Device Role / Timing Role: Primary surge clamp on line side of isolation transformer; coordinated with gas discharge tube (GDT) upstream. Use Value: 10.5 V clamping enables use of 12 V rail-tied protection ICs downstream; 175 °C rating supports sealed enclosure thermal profiles. | Use Scenario: ECG electrode input amplifier stage requiring ultra-low leakage and ESD-safe front-end conditioning. IC Role / Device Role / Timing Role: Unidirectional TVS on amplifier supply rail (AVDD) to suppress coupling from nearby defibrillation pulses. Use Value: 1000 µA max leakage at 5.8 V prevents DC offset drift; 1500 W rating handles IEC 60601-1-2 ed4.1 surge test waveforms. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8A | Same 6.8 V VRM, but 600 W rating (10/1000 µs) and SMB package; lower clamping (11.2 V @ 53.3 A). | Lower power handling limits use to sub-1 kW surges; surface-mount only; unsuitable for legacy through-hole designs. | Select when board space is constrained and surge energy is ≤600 W; verify thermal pad layout for SMB thermal performance. |
| P6KE6.8A | Legacy 600 W TVS in DO-15; higher clamping (10.5 V @ 57.7 A); same DO-201 footprint but longer body (10.2 mm vs. 9.0 mm). | Compatible mechanical fit but lower surge margin; not rated for IEC 61000-4-4 level 4. | Acceptable for cost-sensitive, non-certified industrial equipment where 1500 W margin is unnecessary. |
Compared with SMBJ6.8A and P6KE6.8A, the 1.5KE6V8A delivers 2.5× higher surge power headroom in the same axial package, maintains tighter clamping consistency across temperature, and is certified to full IEC 61000-4-2/4-4 level 4-making it optimal for safety-critical, high-reliability DC rail protection.
Availability
1.5KE6V8A is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, telecom line cards, and medical sensor interfaces requiring stable component supply and long-term lifecycle support.
Supply support for 1.5KE6V8A 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 immunity in DC-fed systems where reliability under repeated transient stress is mandatory.
FAQ
What is the maximum surge current the 1.5KE6V8A can handle?
The 1.5KE6V8A sustains a peak pulse current of 746 A under 10/1000 µs waveform conditions, derived from its 1500 W power rating and 10.5 V clamping voltage (IPP = PPP / VCL). This value is validated at 25 °C ambient; derating applies above that temperature per Figure 3 in DS0636.
Is the 1.5KE6V8A suitable for bidirectional signal lines like RS-485?
No - the 1.5KE6V8A is unidirectional and must be used with correct polarity (cathode to protected line). For bidirectional lines, the 1.5KE6V8CA variant is required. Using 1.5KE6V8A on AC-coupled or differential lines risks forward conduction and failure during negative half-cycles.
How does temperature affect clamping voltage performance?
Clamping voltage increases with junction temperature at a coefficient of +5.7 × 10⁻⁴/°C (αT = 5.7 × 10⁻⁴). At 125 °C, VCL rises ~0.6 V above its 25 °C value (10.5 V), reaching ~11.1 V. Designers must account for this shift when setting overvoltage margins for hot-operation scenarios.
Can the 1.5KE6V8A replace a Zener diode for overvoltage protection?
It can function as a coarse overvoltage clamp but is not a precision voltage reference. Unlike Zeners, it has wide VBR tolerance (5.8–7.14 V), no regulated output, and is optimized for transient energy absorption-not steady-state regulation. Use only where fast, high-energy clamping-not voltage accuracy-is required.
1.5KE6V8A 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):
- 5.8V
- Voltage - Breakdown (Min):
- 6.45V
- Voltage - Clamping (Max) @ Ipp:
- 13.4V
- Current - Peak Pulse (10/1000µs):
- 746A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 9500pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE6V8A FAQ
1.How can I place an order for 1.5KE6V8A through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6V8A 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 1.5KE6V8A reliable?
The price and inventory of 1.5KE6V8A are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6V8A is usually 5 days.
3.What payment methods are accepted for 1.5KE6V8A?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6V8A transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6V8A?
1.5KE6V8A orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6V8A 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 1.5KE6V8A?
For technical support, including 1.5KE6V8A datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6V8A requirements.
6.How does Aetrix verify that 1.5KE6V8A is sourced from the original manufacturer or authorized distributors?
All 1.5KE6V8A 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 1.5KE6V8A meets industry standards.
7.What is the process for return or replacement of 1.5KE6V8A?
All 1.5KE6V8A units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6V8A, 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 1.5KE6V8A part is unused and in its original packaging.
Return procedure for 1.5KE6V8A:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6V8A Tags
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