The Phoenix Contact 2903681 is a highly advanced and versatile industrial connector used primarily in automation, control, and electrical systems. This component is part of Phoenix Contact’s extensive lineup of connectors, designed to meet the needs of industrial and automation applications where high reliability, secure electrical connections, and ease of installation are critical. The 2903681 is specifically designed for pluggable connections, providing an efficient and space-saving solution in a wide range of industries, including manufacturing, energy, transportation, and industrial control systems.

## Overview

Phoenix Contact%27s 2903681 is a Push-in Connector for spring-cage terminal blocks with a high-performance design that offers enhanced functionality and ease of use. This model is typically used in control panels, electrical cabinets, and automation systems, where quick and secure wiring is required. The Push-in technology eliminates the need for screws, allowing for fast and tool-free termination of conductors. Additionally, the product features high-quality materials and an efficient, compact design that ensures optimal performance and longevity, even in challenging environments.

The 2903681 connector is designed for DIN rail mounting and offers high flexibility in terms of wiring configuration, providing users with a variety of options to connect and disconnect their devices efficiently.

## Key Features

1. Push-in Technology:
- The Push-in technology is one of the main features of the 2903681 connector. It allows for tool-free conductor insertion, which significantly reduces installation time and increases efficiency. The spring-cage mechanism ensures that the wires are securely held in place without the need for additional tools like screwdrivers.
- This design is particularly advantageous in environments where fast wiring and reconfiguration are essential.

2. High Reliability:
- The connector is engineered for use in industrial environments, providing a high level of electrical and mechanical reliability. With its robust construction and superior materials, it can withstand harsh conditions such as vibration, temperature fluctuations, and moisture, making it ideal for applications in control panels, automation systems, and power distribution.

3. Compact and Space-saving:
- The 2903681 connector features a compact design, which allows for high-density wiring in control panels and electrical cabinets. This space-saving feature is particularly valuable in applications where panel space is limited, or where many connections need to be made in a confined area.

4. Wide Range of Wire Sizes:
- The connector is compatible with a wide range of wire sizes, making it versatile in its application. It can accommodate wire gauges from 0.2 mm² to 2.5 mm² (24 AWG to 12 AWG), ensuring it can be used in various electrical systems and configurations. This flexibility is crucial for users who work with different types of wiring in their designs.

5. Secure and Safe Connection:
- The spring-cage terminal block mechanism ensures that the wires are securely connected without the risk of loose connections. This guarantees a safe and reliable electrical connection, which is critical in industrial applications where failure is not an option.
- Additionally, the Push-in design helps reduce the risk of accidental disconnections, as it provides a stable mechanical connection with minimal wear over time.

6. Corrosion-resistant Materials:
- The 2903681 connector is made from high-quality, corrosion-resistant materials such as polyamide (PA) and nickel-plated brass, ensuring that it can withstand environmental factors such as humidity, dust, and chemicals without degradation. This feature is particularly valuable in harsh industrial environments, where reliability and long-term performance are essential.

7. Compliance with Standards:
- The Phoenix Contact 2903681 connector complies with various international electrical and safety standards, including UL, CE, and RoHS. This ensures that the connector meets the necessary safety and environmental requirements for global use.

## Detailed Specifications

The Phoenix Contact 2903681 connector is built to meet the specific needs of industrial electrical systems. Below are the key specifications of the product:

## General Characteristics:

- Product Type: Push-in terminal block, spring-cage connection technology
- Mounting Type: DIN rail mounting
- Material: Polyamide (PA) body, nickel-plated brass contact material
- Color: Grey (standard for terminal blocks)
- Flammability Rating: UL 94-V0 (self-extinguishing)
- Operating Temperature Range: -40°C to +85°C
- Storage Temperature Range: -40°C to +85°C
- Electrical Insulation: 500V (dielectric strength)
- Protection Class: IP20 (protection from direct contact)

## Electrical Characteristics:

- Rated Voltage: 250V (for standard applications)
- Rated Current: 12A (maximum current capacity for the terminal block)
- Conductor Cross-section:
- 0.2 mm² to 2.5 mm² (24 AWG to 12 AWG)
- Suitable for both solid and stranded wires
- Wire Insertion: Push-in (tool-free), spring-cage connection
- Minimum Wire Strip Length: 8-9 mm (for optimal contact)
- Conductor Retention: Mechanical spring-cage mechanism for secure wire clamping
- Contact Resistance: < 5 mΩ
- Insulation Resistance: > 100 MΩ at 500V DC

## Mechanical Characteristics:

- Terminal Block Dimensions:
- Width: 5.2 mm
- Height: 50 mm
- Depth: 48 mm
- Weight: Approximately 5 grams per terminal block
- Number of Positions: Typically 1-12 positions, depending on the configuration used
- Stripping Length: 8-9 mm (standard for easy installation)

## Standards and Certifications:

- UL 1059: Certified for use in UL-listed control equipment and panel applications.
- CE Marking: Conforms to European standards for safety, health, and environmental protection.
- RoHS Compliant: Free from hazardous substances, in line with the EU RoHS directive.
- IEC 60947-7-3: Conforms to international standards for terminal blocks in industrial control systems.

## Applications

The Phoenix Contact 2903681 connector is suitable for a wide variety of applications across different industries. Some of the key areas where this connector is typically used include:

1. Industrial Control Panels:
- The 2903681 connector is widely used in control panels and automation systems, where it provides secure connections for wiring and simplifies the installation process with its Push-in technology.

2. Energy and Power Distribution:
- Used in power distribution systems, the connector can handle high current loads (up to 12A), making it suitable for electrical wiring in energy-efficient solutions, power plants, and substations.

3. Automation and Robotics:
- In industrial automation and robotics applications, the 2903681 connector enables quick and secure connections between sensors, controllers, and actuators, helping to reduce downtime and increase system reliability.

4. Building Automation:
- The connector is used in building automation systems, such as lighting controls, HVAC systems, and energy management systems, where secure and efficient wiring is critical for optimal performance and safety.

5. Automotive Applications:
- The 2903681 is also used in automotive control systems, including vehicle diagnostics and electric drive systems, where it provides reliable and robust connections in demanding environments.

6. Renewable Energy Systems:
- In solar power systems and wind turbines, where high-reliability connections are required for DC and AC power distribution, the 2903681 connector can be used to ensure consistent and secure electrical connections.

7. Machine Building:
- The connector is also used in machine building applications, where it connects various components such as motors, sensors, and control panels.

## Conclusion

The Phoenix Contact 2903681 is a high-quality, versatile Push-in terminal block that provides efficient, reliable, and secure electrical connections for a wide range of industrial applications. Featuring tool-free installation, high current capacity, and a compact design, this connector is ideal for use in control panels, automation systems, and other industrial control applications where space-saving, high-performance, and ease of installation are critical. With its spring-cage technology, low contact resistance, and ability to accommodate various wire sizes, the Phoenix Contact 2903681 ensures that users can create safe, durable, and efficient electrical connections that meet the demands of modern industrial systems.