ABB ZAF185-70 contactor coil

Product Overview

The ABB ZAF185-70 is a contactor coil designed for ABB’s AF145 to AF185 series contactors. As a magnetic operating coil, it provides the actuator force to pull in and release the main contacts of the contactor. The coil is modular and replaceable. It accepts a wide control voltage range of 100 V to 250 V in either AC or DC mode.

Key Technical Specifications

Advantages & Features

1. Wide Voltage Compatibility
   Works over a broad control voltage range (100-250 V AC/DC), which reduces the need for multiple coil variants across different regions or systems.

2. Modular Replaceability
   The coil is detachable and replaceable independently, reducing maintenance cost and downtime.

3. Reliable Matching & Brand Assurance
   As an ABB-manufactured coil, it ensures good electrical and mechanical compatibility with its matched contactors.

4. Low Holding Power & Thermal Efficiency
   Low power consumption during hold state helps minimize energy usage and heat generation, contributing to longer service life.

5. Compact Design & Easy Installation
   Standard screw terminal usage and moderate dimensions facilitate straightforward installation and replacement.

Application Areas

Typical applications of ZAF185-70 include:

• Industrial automation and motor control systems

• Heavy-duty equipment control (compressors, pumps, fans, conveyors)

• Main power control units in power generation, chemical plants, mining, steel, water treatment

• High-power control panels and distribution systems

• Spares for preventive maintenance and replacement in existing ABB contactor systems

Precautions & Notes for Use

1. Verify Matching Control Voltage
   Make sure the control circuit’s voltage is within 100-250 V before installation. Under- or over-voltage operation may lead to malfunction or damage.

2. Polarity & Wiring
   For DC operation, ensure correct polarity wiring. Incorrect polarity can cause delayed or failed actuation.

3. Ambient Conditions & Thermal Limits
   Use in ambient temperatures within allowable limits (e.g. ≤ ~70 °C). Avoid harsh environments with humidity, dust, corrosive gases, or inadequate ventilation.

4. Voltage Fluctuations & Surges
   Avoid severe voltage fluctuations or surges, which may disrupt coil performance or compromise insulation integrity.

5. Mechanical Installation Integrity
   Ensure the coil is firmly installed with proper alignment; tighten terminals securely (but not excessively), and use appropriate wire gauges to avoid poor contact or heating.

6. Frequent Cycling Impact
   If the system demands frequent switching, consider effects on coil and contactor lifespan, thermal load, and wear on contacts.

7. Storage & Handling
   Store spare coils in dry, stable environments. Before use after long-term storage, check insulation, clean terminals, and perform relevant tests.

The structure and details of the product：

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