P74JA-2C

The Johnson P74JA-2C Differential Pressure Control Switch is a versatile and reliable automotive component designed for regulating engine cooling systems. This switch operates based on the principle of differential pressure, making it an essential part of maintaining optimal engine temperature.

The P74JA-2C switch is designed with a robust construction to withstand the rigors of automotive applications. It features a compact, round, 8-60 series housing that measures approximately 1.6 inches in diameter and 1.3 inches in height. The switch body is made of durable, corrosion-resistant materials, ensuring long-lasting performance even in harsh environments.

The Johnson P74JA-2C switch operates on a simple principle: when the differential pressure between two fluid inputs exceeds a specific threshold, the switch actuates, providing a signal to the engine control module or other relevant systems. This signal can trigger various responses, such as turning on the cooling fan or activating the heater core.

The switch comes equipped with a built-in, adjustable pressure spring, allowing users to easily customize the pressure threshold to suit their specific application. The spring tension can be adjusted using a flathead screwdriver, enabling fine-tuning to ensure the switch responds appropriately to temperature changes.

The Johnson P74JA-2C switch features a clear, red indicator light that illuminates when the switch is activated. This visual cue alerts users of the engaged cooling system, providing valuable feedback and peace of mind.

Installation of the Johnson P74JA-2C switch is straightforward. It is designed to fit standard automotive wiring configurations, with two input terminals for the fluid pressure sources and two output terminals for the engine control module or other relevant systems. The switch is also compatible with various cooling system configurations, making it a versatile solution for a wide range of automotive applications.

In conclusion, the Johnson P74JA-2C Differential Pressure Control Switch is an essential component for maintaining optimal engine temperature in automotive applications. Its robust construction, adjustable pressure threshold, and clear indicator light make it a reliable and customizable solution for engine cooling system regulation.

The Johnson P74JA-2C differential pressure control switch is a commonly used component in various industrial and HVAC applications. Here are some pros and cons that can help individuals decide if this switch is the right choice for their specific needs:

1. Wide Operating Range: This control switch can handle a differential pressure range of 8 to 60 psi (pounds per square inch), making it a versatile option for various applications.

2. Durable Construction: The switch is designed to withstand harsh environments, featuring a rugged housing that can resist corrosion and vibration.

3. Easy Installation: The switch is relatively easy to install, as it only requires wiring connections and mounting it in the desired location.

4. Accurate Performance: This control switch provides precise and reliable control, ensuring the optimal performance of the system it is connected to.

5. Cost-Effective: Compared to other pressure control solutions, the Johnson P74JA-2C switch is a cost-effective option for controlling differential pressure in industrial and HVAC applications.

1. Limited Pressure Adjustment Range: While the switch offers a wide operating range, the adjustment range for the set point pressure is relatively limited.

2. Manual Adjustment: The switch requires manual adjustment of the set point pressure, which can be time-consuming and labor-intensive for large installations.

3. No Built-in Indicators: The switch does not have any built-in indicators, such as a pressure gauge or LED lights, which can make it difficult to monitor the pressure level at a glance.

In conclusion, the Johnson P74JA-2C differential pressure control switch is a reliable and cost-effective option for controlling differential pressure in various applications. Its rugged construction, wide operating range, and precise performance make it a popular choice in industrial and HVAC settings. However, its limited adjustment range and lack of built-in indicators may be drawbacks for some users.

Based on the information provided, my recommendation would be to consider the Johnson P74JA-2C switch as a viable option for controlling differential pressure in applications where the operating range and cost are the primary concerns. However, if precise pressure adjustment and real-time monitoring are essential, other pressure control solutions with more advanced features may be worth exploring.

Details:

Johnson controls Penn series differential pressure control switch, model P74JA-2C.

specifications indusswitch:

• brand: Johnson Controls
• mpn: P74ja-2c
• type: Differential Pressure Control

payments indusswitch:

• other
• credit card: diners-club
• wallet: apple-pay

offer indusswitch:

• sold #: 8
• in stock #: 5
• best offers: true
• options: ship-to-home
• prices: $199.90–$574.80
• item condition:
  • New – Open box
  • New
  • New: Never Used
• availability: in stock
• started: may 31, 2026

shipping indusswitch:

• carrier: ups
• type: fixed
• class: standard
• service: ups ground
• transit: 3-5 days

returns indusswitch:

• policy: returns accepted
• method: money back
• paid by: buyer
• time: 30 days

seller indusswitch:

• # reviews: 158
• rating: 100.0%
• city: circle pines, minnesota

general indusswitch:

• category: Business & Industrial > Electrical Equipment Supplies > Pressure Switches

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