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STMicroelectronics 1.5KE68ARL
- Part No.:
- 1.5KE68ARL
- Manufacturer:
- STMicroelectronics
- Category:
- TVS Diodes
- Package:
- DO-201AA, DO-27, Axial
- Datasheet:
-
1.5KE68ARL.pdf
- Description:
- TVS DIODE 58.1VWM 121VC DO201
- Quantity:
- Payment:
- Shipping:
Inventory:5,743
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Product details
Overview
1.5KE68ARL from STMicroelectronics is a unidirectional Transil™ transient voltage suppression (TVS) diode in DO-201 package, designed for high-energy surge protection. It features 68 V breakdown voltage (VBR = 64.6–71.4 V), 92 V clamping voltage (VCL) at 16.3 A peak pulse current (10/1000 µs), and 1500 W peak pulse power dissipation - deployed to safeguard MOSFETs and low-voltage ICs in DC power rails and industrial I/O interfaces.
For engineers reviewing the 1.5KE68ARL datasheet, 1.5KE68ARL pinout, 1.5KE68ARL application, or 1.5KE68ARL equivalent, key selection criteria include clamping ratio (VCL/VBR ≈ 1.43), leakage current (<1 µA @ 55.2 V), junction-to-lead thermal resistance (20 °C/W), and UL 497B certification for telecom surge protection compliance.
Technical Context
This TVS diode operates as a voltage-clamping device that enters avalanche conduction within nanoseconds of overvoltage onset, diverting surge current away from protected circuitry. Its unidirectional configuration provides reverse-polarity surge suppression only, with forward voltage drop ≤3.5 V at 100 A (typical), and temperature coefficient αT = 10.4 × 10−4 /°C for VBR drift compensation.
The device is rated for 175 °C maximum junction temperature and 230 °C maximum lead temperature during soldering. Thermal performance is defined by Rth(j-l) = 20 °C/W and Rth(j-a) = 75 °C/W on FR4 PCB (10 mm leads), enabling reliable operation under repetitive surge conditions when mounted with adequate copper area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak pulse power | 1500 W (10/1000 µs waveform) - sustains single high-energy surges per IEC 61000-4-5 Level 4 without failure |
| Breakdown voltage VBR | 64.6–71.4 V @ IR = 1 mA - defines minimum trigger threshold for clamping activation |
| Clamping voltage VCL | 92 V @ IPP = 16.3 A (10/1000 µs) - maximum voltage seen by protected IC during worst-case surge |
| Leakage current IR | <1 µA @ 55.2 V - ensures negligible standby power loss and signal integrity in high-impedance circuits |
| Junction-to-lead Rth(j-l) | 20 °C/W - enables effective heat transfer to PCB traces or heatsink for thermal reliability |
| Capacitance CJ | 1550 pF @ 0 V, 1 MHz - limits high-frequency noise coupling but requires layout consideration in >1 MHz signal paths |
| UL recognition | UL 497B File QVGQ2.E136224 - certified for primary-side surge protection in telecom and industrial equipment |
Pinout & Package
1.5KE68ARL is housed in a DO-201 axial-leaded package (EIAJ standard), epoxy-molded, lead-free, and UL94 V0 rated. Dimensions: 8.5–9.5 mm length (A), 4.8–5.3 mm diameter (C), 0.96–1.06 mm lead diameter (D), with 25.4 mm lead spacing (B).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (A) | Surge current sink path | Connected to protected line; conducts during reverse overvoltage events only |
| Cathode (K) | Reference/ground return | Connected to system ground or low-impedance reference; completes clamping current path |
Key Features
| Feature | Design Value |
|---|---|
| Low clamping factor | VCL/VBR ≈ 1.43 - minimizes overvoltage stress on downstream 72 V-rated components |
| Fast response time | <1 ns turn-on - engages before most semiconductor damage thresholds are exceeded |
| High surge robustness | Withstands 200 A non-repetitive forward surge (10 ms) - supports backup battery or capacitor discharge event handling |
| Thermal stability | 175 °C max junction temperature + 10.4 × 10−4/°C VBR TC - maintains clamping accuracy across industrial ambient ranges |
| Environmental compliance | ECOPACK®-compliant, RoHS/lead-free, UL94 V0 epoxy - meets global safety and sustainability requirements |
Applications
| Industrial PLC I/O Protection | DC Power Rail Surge Suppression |
|---|---|
Use Scenario: 24 V and 48 V digital input modules exposed to inductive switching transients and lightning-induced surges on field wiring. IC Role / Device Role: Primary shunt protector placed between signal line and chassis ground, upstream of optocoupler or level-shifter IC. Use Value: Limits transient voltage to ≤92 V, preventing latch-up or gate oxide rupture in 75 V-tolerant interface ICs while surviving repeated 1 kV/500 A surges. | Use Scenario: Input stage of industrial SMPS or PoE-powered equipment subjected to AC line transients coupled onto DC bus. IC Role / Device Role: Standoff protector across bulk capacitor terminals, clamping fast-rising common-mode spikes before they reach controller ICs. Use Value: Absorbs up to 1500 W surge energy without degradation, maintaining <1 µA leakage to avoid capacitor self-discharge and ensure stable startup sequencing. |
| Telecom Line Interface | Automotive Body Control Module |
Use Scenario: T1/E1 data line protection in base station remote units where UL 497B compliance is mandatory. IC Role / Device Role: Secondary-level protector after gas discharge tube (GDT), providing low-clamp refinement for sensitive PHY ICs. Use Value: UL-certified coordination with GDT enables full IEC 61000-4-5 Level 4 immunity (4 kV line-earth) while limiting residual voltage to safe levels for 3.3 V/5 V transceivers. | Use Scenario: 12 V battery-supplied microcontroller inputs monitoring door lock actuators or window motor drivers. IC Role / Device Role: Reverse-polarity and load-dump surge suppressor on MCU GPIO lines connected to external switches or sensors. Use Value: Withstands ISO 7637-2 Pulse 1 (−150 V, 2 Ω, 50 ms) and Pulse 3a/b (±100 V, 50 ns rise) without failure, preserving MCU functionality during vehicle cranking or alternator load dump. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar TVS diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ64A | DO-214AA package, 64 V VBR, 101 V VCL @ 14.9 A, 600 W rating | Lower power rating and surface-mount format - suited for space-constrained PCBs but not direct replacement for 1500 W surge events | Select when board real estate is limited and surge energy is ≤600 W; verify thermal pad design for SMB footprint. |
| 1N6277A | Same DO-201 package, 64.6 V VBR, 103 V VCL @ 14.6 A, 1500 W rating, MIL-STD-750 tested | Military-grade screening and extended temperature qualification - adds cost and lead time without functional benefit for commercial industrial use | Choose only if MIL-STD-750 testing or extended temp range (−65 °C to +175 °C) is contractually required. |
Compared with SMBJ64A and 1N6277A, 1.5KE68ARL delivers optimal balance of high-power surge handling (1500 W), industry-standard DO-201 through-hole mounting, and UL 497B certification - making it preferred for cost-sensitive, high-reliability industrial power and I/O protection where axial-leaded mechanical robustness matters.
Availability
1.5KE68ARL is available at Aetrix Electronics and suitable for industrial PLC I/O protection, DC power rail surge suppression, and telecom line interface applications requiring stable component supply and long-term obsolescence management.
Supply support for 1.5KE68ARL 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 silicon solutions for automotive, industrial, and power management markets since 1987.
The 1.5KE series belongs to ST's Transil™ TVS portfolio, engineered specifically for high-energy transient suppression in harsh industrial and telecom environments - emphasizing robustness, repeatable clamping, and regulatory compliance over speed or capacitance optimization.
FAQ
What is the maximum operating junction temperature for 1.5KE68ARL?
The absolute maximum operating junction temperature is 175 °C, verified per Table 1 of STMicroelectronics Doc ID 2913 Rev 4. This rating allows continuous operation in industrial enclosures up to 85 °C ambient when mounted on a PCB with ≥10 mm lead length and ≥1 cm² copper pour, leveraging its 20 °C/W junction-to-lead thermal resistance.
Is 1.5KE68ARL bidirectional or unidirectional?
1.5KE68ARL is unidirectional: it clamps only during reverse-biased overvoltage events (anode negative relative to cathode). The "A" suffix in the order code confirms unidirectional configuration; bidirectional variants carry "CA" (e.g., 1.5KE68CA). This makes it suitable for DC power line protection where polarity is fixed.
How does the clamping voltage change with different surge waveforms?
VCL = 92 V is specified for the 10/1000 µs waveform. For the faster 8/20 µs waveform, VCL rises to 121 V at the same peak current (16.3 A), per Table 3. This reflects higher dynamic impedance under steeper transients - a critical design factor when protecting against lightning-induced surges versus switching transients.
Can 1.5KE68ARL be used in parallel for higher surge current handling?
No - paralleling TVS diodes causes current imbalance due to VBR tolerance (±5% for 1.5KE68ARL), leading to premature failure of the lower-VBR unit. ST recommends using a single higher-rated device (e.g., 3KP68A) or verifying matched-bin devices with <1% VBR spread and identical thermal layout if redundancy is essential.
1.5KE68ARL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Package/Case:
- DO-201AA, DO-27, Axial
- Series:
- 1.5KE, TRANSIL™
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 58.1V
- Voltage - Breakdown (Min):
- 64.6V
- Voltage - Clamping (Max) @ Ipp:
- 121V
- Current - Peak Pulse (10/1000µs):
- 83A (8/20µs)
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- 1550pF @ 1MHz
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-201
1.5KE68ARL FAQ
1.How can I place an order for 1.5KE68ARL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1.5KE68ARL 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 1.5KE68ARL reliable?
The price and inventory of 1.5KE68ARL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1.5KE68ARL is usually 5 days.
3.What payment methods are accepted for 1.5KE68ARL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1.5KE68ARL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1.5KE68ARL?
1.5KE68ARL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1.5KE68ARL 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 1.5KE68ARL?
For technical support, including 1.5KE68ARL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1.5KE68ARL requirements.
6.How does Aetrix verify that 1.5KE68ARL is sourced from the original manufacturer or authorized distributors?
All 1.5KE68ARL 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 1.5KE68ARL meets industry standards.
7.What is the process for return or replacement of 1.5KE68ARL?
All 1.5KE68ARL units undergo pre-shipment inspection (PSI). If there is an issue with 1.5KE68ARL, 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 1.5KE68ARL part is unused and in its original packaging.
Return procedure for 1.5KE68ARL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1.5KE68ARL Tags
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