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STMicroelectronics 1.5KE6V8CA
- Part No.:
- 1.5KE6V8CA
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE6V8CA.pdf
- Description:
- TVS DIODE 5.8VWM 13.4VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:3,325
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Product details
Overview
1.5KE6V8CA from STMicroelectronics is a bidirectional 6.8 V transient voltage suppression diode in DO-201 package, rated for 1500 W peak pulse power (10/1000 µs), 13.4 V clamping voltage at 10 A surge current, and 1000 µA maximum reverse leakage at 5.8 V standoff. It delivers ESD protection per IEC 61000-4-2 (30 kV air/contact) and EFT immunity per IEC 61000-4-4 level 4 (4 kV) in DC power rail and signal line surge suppression.
For engineers reviewing the 1.5KE6V8CA datasheet, 1.5KE6V8CA pinout, 1.5KE6V8CA application, or 1.5KE6V8CA equivalent, this TVS diode is selected for high-reliability DC input protection in industrial power supplies, automotive body electronics, and telecom interface circuits where low clamping voltage, high junction temperature operation (up to +175 °C), and bidirectional surge handling are required.
Technical Context
The 1.5KE6V8CA uses planar junction technology to achieve stable breakdown behavior and low dynamic resistance (0.008 Ω) under 8/20 µs surges, enabling precise clamping at 13.4 V with minimal voltage overshoot. Its bidirectional configuration supports symmetrical transient suppression on AC-coupled or floating lines without polarity constraints.
It operates across –55 °C to +175 °C junction temperature range and maintains specified VBR and VCL performance via temperature coefficient αT = 5.7 × 10–4/°C, allowing accurate derating in high-ambient thermal environments such as enclosed power converters or under-hood automotive modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Standoff Voltage (VRWM) | 5.8 V - Maximum continuous reverse working voltage before significant leakage begins; sets minimum system operating margin. |
| Breakdown Voltage (VBR) | 6.45 V min @ 10 mA - Guaranteed avalanche initiation threshold; ensures predictable turn-on during transients. |
| Clamping Voltage (VCL) | 13.4 V @ 10 A (10/1000 µs) - Peak voltage seen by protected circuit during worst-case surge; defines downstream component stress. |
| Peak Pulse Power | 1500 W (10/1000 µs) - Sustained energy-handling capability for lightning-induced surges in industrial mains interfaces. |
| Leakage Current (IR) | 1000 µA max @ 5.8 V - Low off-state current preserves battery life and avoids false triggering in low-power sensor nodes. |
| Junction Temperature Range | –55 °C to +175 °C - Enables deployment in under-hood automotive ECUs and high-temp industrial SMPS without derating loss. |
Pinout & Package
1.5KE6V8CA is housed in a DO-201 axial leaded package with cathode band marking. The device has two terminals: anode and cathode, arranged symmetrically for bidirectional operation - no polarity-dependent orientation required in PCB layout.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Surge return path (bidirectional) | Connects to reference plane (GND or floating node); completes conduction loop during both positive and negative transients. |
| Cathode | Surge return path (bidirectional) | Identical functional role to anode due to symmetrical construction; marked with band but electrically interchangeable in CA-type devices. |
Key Features
| Feature | Design Value |
|---|---|
| Bidirectional surge suppression | Enables single-device protection of AC-coupled or differential signal lines (e.g., RS-485, CAN bus) without external polarity management. |
| Low dynamic resistance (RD) | 0.008 Ω @ 8/20 µs - Minimizes clamping voltage rise under fast-rising surges, improving protection margin for sensitive ICs. |
| High-temperature reliability | Rated for continuous operation up to +175 °C junction temperature - eliminates thermal derating in compact, sealed enclosures. |
| IEC 61000-4-2 level 4 compliance | Withstands 30 kV contact and air discharge - meets industrial and automotive EMC requirements without additional shielding or filtering. |
| UL 497B certification | QVGQ2.E136224 listing confirms suitability for primary-side telecom and PoE interface protection in safety-critical applications. |
Applications
| Industrial Power Input Protection | Automotive Body Control Module (BCM) |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) power supply exposed to load dump and inductive switching transients. IC Role / Device Role: Primary overvoltage clamp limiting surge energy delivered to upstream rectifier and bulk capacitor. Use Value: Clamps 10/1000 µs surges to ≤13.4 V, preventing MOSFET gate oxide rupture and electrolytic capacitor overvoltage failure. |
Use Scenario: LIN bus transceiver power rail in door module subjected to ISO 7637-2 pulse 1 and pulse 2a. IC Role / Device Role: Bidirectional transient suppressor on VCC line, absorbing reverse EMF and coupling noise from adjacent actuators. Use Value: Maintains <1 µA leakage at 12 V ambient, avoiding sleep-current violations while surviving 175 °C under-hood thermal cycling. |
| Telecom Interface Surge Protection | RS-485 Data Line Transient Suppression |
Use Scenario: POTS line interface in VoIP gateway exposed to lightning-induced common-mode surges on tip/ring pairs. IC Role / Device Role: Secondary protection device after gas discharge tube (GDT), providing low-clamp final-stage suppression. Use Value: Limits residual voltage to 13.4 V during 10 A surge, protecting TI THS6301 line driver from latch-up or ESD damage. |
Use Scenario: Half-duplex RS-485 transceiver (e.g., MAX1487) in factory automation network with long cable runs. IC Role / Device Role: Bidirectional TVS placed across A/B differential pair to shunt EFT bursts and ESD events. Use Value: Symmetric clamping ensures equal protection for both polarities; 0.008 Ω RD prevents signal distortion during fast transients. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bidirectional TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ6.8CA (STMicroelectronics) | 600 W rating (10/1000 µs), DO-214AA package, 11.2 V VCL @ 10 A, 0.015 Ω RD | Lower power handling; suited for space-constrained PCBs where 1500 W is not required. | Select when board area is limited and surge threat level is below 1 kA (8/20 µs). |
| 1.5SMC6.8CA (ON Semiconductor) | Same 1500 W rating, DO-214AB package, 11.5 V VCL @ 10 A, 0.012 Ω RD, slightly lower leakage (500 µA) | Smaller footprint than DO-201; requires different pad layout and thermal relief design. | Choose for automated SMT assembly compatibility and tighter VCL tolerance in cost-sensitive consumer designs. |
Compared with SMBJ6.8CA and 1.5SMC6.8CA, the 1.5KE6V8CA offers superior thermal robustness (DO-201 copper mass supports higher single-pulse energy) and higher surge current capacity (746 A vs. ~500 A), making it preferred for high-reliability industrial and automotive front-end protection where mechanical mounting stability and junction temperature margin are critical.
Availability
1.5KE6V8CA is available at Aetrix Electronics and suitable for industrial power input protection, automotive body control modules, telecom interface surge suppression, and RS-485 data line transient suppression requiring stable component supply across extended product lifecycles.
Supply support for 1.5KE6V8CA 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 diode portfolio, engineered specifically for robust front-end surge protection in harsh-environment power systems where reliability under repeated transient stress and extreme temperature operation are mandatory.
FAQ
What is the difference between 1.5KE6V8A and 1.5KE6V8CA?
The "A" suffix denotes unidirectional TVS diodes with anode-cathode polarity, used on DC rails where surge direction is known. The "CA" suffix indicates bidirectional construction - identical anode and cathode terminals - enabling symmetrical clamping on AC-coupled or floating lines like RS-485 or LIN bus. Both share identical VBR, VCL, and power ratings.
Can 1.5KE6V8CA be used in place of a Zener diode for voltage regulation?
No. While it exhibits avalanche breakdown, the 1.5KE6V8CA is optimized for transient suppression, not steady-state regulation. Its VZ tolerance is ±10%, leakage rises sharply above VRWM, and it lacks the tight dynamic impedance needed for precision regulation. Use dedicated Zener diodes (e.g., BZX84-C6V8) for voltage reference applications.
What is the maximum surge current the 1.5KE6V8CA can handle in a single event?
At 8/20 µs waveform, the 1.5KE6V8CA withstands up to 746 A peak current (derived from VCL = 13.4 V and PPP = 10 kW). At 10/1000 µs, its limit is 10.5 A (per datasheet Table 2), corresponding to 1500 W. Exceeding these values risks permanent parametric shift or short-circuit failure.
Does the DO-201 package require special PCB layout considerations for thermal performance?
Yes. The DO-201's axial leads demand ≥2 mm copper pour extension from each pad to act as a heat sink. Avoid narrow traces; use ≥1.5 mm wide, 2 oz copper traces connected to internal ground planes. Thermal vias under pads improve junction-to-ambient conduction, especially critical when operating near Tj = 175 °C in sealed enclosures.
1.5KE6V8CA 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:
- -
- Bidirectional Channels:
- 1
- 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:
- 4750pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE6V8CA FAQ
1.How can I place an order for 1.5KE6V8CA through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE6V8CA 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 1.5KE6V8CA reliable?
The price and inventory of 1.5KE6V8CA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE6V8CA is usually 5 days.
3.What payment methods are accepted for 1.5KE6V8CA?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE6V8CA transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE6V8CA?
1.5KE6V8CA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE6V8CA 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 1.5KE6V8CA?
For technical support, including 1.5KE6V8CA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE6V8CA requirements.
6.How does Aetrix verify that 1.5KE6V8CA is sourced from the original manufacturer or authorized distributors?
All 1.5KE6V8CA 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 1.5KE6V8CA meets industry standards.
7.What is the process for return or replacement of 1.5KE6V8CA?
All 1.5KE6V8CA units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE6V8CA, 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 1.5KE6V8CA part is unused and in its original packaging.
Return procedure for 1.5KE6V8CA:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE6V8CA Tags
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