The LEL21-31159-30-V is a hydraulic-magnetic circuit breaker manufactured by Sensata Technologies/Airpax. It's designed to protect electrical circuits from overcurrent conditions by interrupting the current flow when a fault occurs. Hydraulic-magnetic breakers offer stable trip characteristics over a wide range of temperatures and are often used in applications where precision and reliability are critical.

Applications:

• Power Supplies: Provides overcurrent protection for power supplies in various electronic devices.
• Industrial Equipment: Used in industrial machinery, control panels, and other industrial applications to protect electrical circuits.
• Telecommunications Equipment: Protects sensitive telecommunications equipment from damage due to overcurrent events.
• Medical Equipment: Used in medical devices where reliable circuit protection is essential.
• Marine Applications: Suitable for use in marine environments due to its robust construction and stable performance.

Features:

• Hydraulic-Magnetic Technology: Provides stable trip characteristics over a wide temperature range, unlike thermal breakers.
• 30 Amp Rating: Designed to protect circuits with a maximum current of 30 amps.
• Voltage Rating: The "V" likely indicates a specific voltage rating. Datasheet must be checked.
• LEL Series: Part of the Airpax LEL series, known for its reliability and performance.
• Multiple Poles: This is a 2-pole breaker (LEL21), offering protection for two separate circuits.

Benefits:

• Precise Overcurrent Protection: Provides accurate and reliable overcurrent protection, minimizing the risk of damage to electrical equipment.
• Stable Performance: Maintains stable trip characteristics over a wide temperature range, ensuring consistent protection in varying environmental conditions.
• High Reliability: Offers high reliability and long service life, reducing maintenance costs and downtime.
• Versatile Applications: Suitable for a wide range of applications due to its robust design and performance characteristics.
• Resettable: Can be easily reset after a trip, allowing for quick restoration of circuit operation.

Additional Details:

The LEL21-31159-30-V's trip curve defines the relationship between overcurrent and trip time. This curve is crucial for selecting the appropriate breaker for a specific application. The breaker's interrupting capacity (the maximum current it can safely interrupt) is a critical specification. The hydraulic-magnetic mechanism uses a magnetic coil and a hydraulic time delay element to provide time-delayed tripping. It's essential to consult the Sensata Technologies/Airpax datasheet for detailed specifications, including voltage ratings, trip curves, interrupting capacity, and mounting dimensions. Installation instructions and safety precautions should be carefully followed. The specific voltage rating is crucial for proper application. Improper voltage selection can cause failure and safety hazards.