3UA5500 Series Thermal Overload Relay for Siemens, 3UA5500-1E 1F 1H (2.5A-8A) Motor Protection

Product Overview

The 3UA5500 series thermal overload relays are designed for Siemens 3TF series contactors to provide dependable overload and phase-failure protection for three-phase AC electric motors. Built with an adjustable current setting dial, ambient temperature compensation, and switchable manual/automatic reset, they protect industrial motors and control systems from thermal overload and phase imbalance.

Available Models & Current Ranges

• 3UA5500-1E: Current setting range 2.5A – 4.0A
• 3UA5500-1F: Current setting range 3.2A – 5.0A
• 3UA5500-1H: Current setting range 5.0A – 8.0A

Technical Specifications

• Product Series: 3UA5500 (3UA55 00)
• Brand Compatibility: Compatible with Siemens 3TF30, 3TF31, 3TF32, 3TF33, 3TF34, 3TF35 contactors
• Rated Insulation Voltage (Ui): 690V AC
• Auxiliary Contacts: 1 NO + 1 NC electrically separate (95-96 NC, 97-98 NO)
• Trip Class: Class 10A with ambient temperature compensation (-20°C to +60°C)
• Reset Mode: Switchable Manual (Hand) / Automatic reset with test button
• Item Weight: Approx. 1.0 kg
• Standard Compliance: IEC 60947-4-1, CE certified

Key Features

• Differential Phase-Failure Protection: Highly responsive protection against motor phase loss and unbalance.
• Temperature Compensated: Ensures consistent trip characteristics across fluctuating ambient cabinet temperatures.
• Plug-in & Direct Mounting: Easily mounts directly to Siemens 3TF contactors or independent mounting bases.

Inquiries & Worldwide Shipping

We supply authentic industrial control gear and electrical replacement parts. For bulk orders or distributor pricing, please contact us at: inquiry@electrical-online-store.com.

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