HARTMAN A-703R Aircraft Relay Contactor

( Brand: Hartman ), ( Manufacturer Part Number: A-703R ), ( Part Type: Contactor )

Review HARTMAN Aircraft Relay Contactor New

The Hartman A-703R Aircraft Relay Contactor is a versatile and reliable electrical switching device, specifically designed for use in avionics applications. This contactor boasts an impressive current carrying capacity of 70 amperes and can handle voltage levels up to 30 volts DC.

The A-703R is constructed using high-quality materials, ensuring durability and longevity in demanding aircraft environments. The contacts are made from beryllium copper alloy, known for its excellent electrical conductivity and resistance to wear. The contact surfaces are gold-plated, providing superior contact resistance and ensuring consistent performance over time.

This contactor features a robust and compact design, measuring only 1.5 inches in width and 2.5 inches in height. It is suitable for both panel mounting and rack mounting configurations, making it a versatile solution for various avionics system designs.

The Hartman A-703R comes with an integrated pilot lamp, which illuminates when the contactor is in the closed position. This visual indicator is invaluable for troubleshooting and system monitoring purposes. Additionally, the contactor's normally open configuration ensures that it only completes the circuit when it is intentionally engaged.

The contactor's operating mechanism is based on a solenoid coil, which can be easily activated through an external control signal. The contactor's coil is rated for a maximum operating voltage of 125 volts AC or 28 volts DC, and it can handle a maximum current of 3 amperes.

The Hartman A-703R Aircraft Relay Contactor is designed to meet the stringent requirements of the aviation industry, including FAR-Part 21 and DO-160. This contactor is an essential component for various aircraft electrical systems, including fuel quantity indication, landing gear control, and lighting systems, offering dependable performance and longevity.

The Hartman A-703R aircraft relay contactor is a commonly used component in avionics systems for switching electrical circuits. Here are some pros and cons of buying this contactor:

1. Reliability: Hartman contacts are known for their durability and reliability in harsh environments. The A-703R contactor is designed to withstand vibration, temperature extremes, and electrical surges.

2. Versatility: This contactor can be used in various applications, including fuel system, hydraulic system, and landing gear circuits. It can handle up to 20 amps of current and 125 volts of voltage.

3. Easy installation: The A-703R contactor comes with clear markings and a user-friendly design, making it easy to install and maintain. It also has a quick-connect terminal block for easy wiring.

4. Safety: The contactor has a built-in overcurrent protection feature, which helps prevent electrical overloads and potential fires.

1. Cost: The Hartman A-703R contactor is more expensive than some other contactors in the market. However, its reliability and durability make it a worthwhile investment for avionics applications.

2. Size: The contactor is larger than some other contactors, which may make it difficult to install in tight spaces.

3. Limited application: The A-703R contactor is designed for aircraft applications and may not be suitable for other industrial or automotive applications.

The Hartman A-703R aircraft relay contactor is a reliable and versatile component for avionics systems. Its durability, ease of installation, and safety features make it a worthwhile investment, despite its higher cost and larger size compared to some other contactors.

If you are looking for a high-quality and reliable contactor for avionics applications, the Hartman A-703R contactor is a good choice. Its durability and versatility make it a valuable asset in harsh environments where reliability is essential. While it may be more expensive than some other contactors, its long-term value and performance make it a worthwhile investment.

Details:

This is a Hartman Aircraft A-703R relay contactor. See pictures for specifications and what is included.

part #: a703r price

• $695.00

specifications aviationpar:

• brand: Hartman
• mpn: A-703r
• part type: Contactor

payments aviationpar:

• credit card: Mastercard
• other
• wallet: Paypal

shipping aviationpar:

• service: USPS Ground Advantage
• type: Calculated
• transit: 44-47 Days
• carrier: USPS
• cost: $8.65
• class: Standard

offer aviationpar:

• options: Ship-to-home
• sold: 0
• quantity: 1
• started: March 16, 2026
• availability: In Stock

returns aviationpar:

• time: 30 Days
• paid by: Seller
• policy: Returns Accepted

general aviationpar:

• Parts Accessories > Aviation Parts Accessories > Parts
• condition: New other see details

seller aviationpar:

• city: Grass Valley, California
• rating: 100.0%
• # reviews: 1691

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