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Siemens 48HA18AA4 Bimetal Thermal Overload Relay - 18A

Siemens 48HA18AA4 Bimetal Thermal Overload Relay

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ManufacturerSiemens

Part number48HA18AA4

Type Bimetal Thermal Overload Relay

Amperage Rating 18A

Number of Poles 1

Reset Type Auto/Manual

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Bimetal Trip Mechanism Ambient Compensated 1-Pole Configuration Auto/Manual Reset Panel Mounting 18A Rating

Product description

The Siemens 48HA18AA4 is a 1-pole bimetal thermal overload relay designed for single-phase motor protection. It features an 18 Ampere rating and is ambient compensated for stable performance in varying temperatures. This relay supports auto/manual reset and is suitable for panel mounting.

This overload relay is commonly used in applications requiring protection for single-phase motors, such as those found in HVAC systems, pumps, and small industrial equipment. Its thermal bimetal mechanism provides reliable protection against overcurrents.

Stanlo Automation, a veteran-owned distributor of industrial automation surplus parts, offers the Siemens 48HA18AA4. We provide quality components and dependable service to help maintain your operations.

Technical specifications

Type	Bimetal Thermal Overload Relay
Amperage Rating	18A
Number of Poles	1
Reset Type	Auto/Manual
Mounting	Panel
Ambient Compensated	Yes
Application	1-Phase

Common applications

Single-Phase Motor Protection

HVAC Systems

Pump Control

Small Industrial Equipment

Machine Tools

Compatible systems

Compatible with specific Siemens motor starters

Also known as

Siemens 48HA Overload Relay 18 Amp Overload

Replaces / compatible with

This panel-mount overload relay is designed for integration with specific Siemens motor starters and control systems.

Technical note

Expert tip

This relay is ambient compensated, ensuring accurate trip points regardless of ambient temperature fluctuations within its operating range.

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Frequently asked questions

What is the amperage rating for the Siemens 48HA18AA4 overload relay?

The Siemens 48HA18AA4 overload relay has a fixed amperage rating of 18 Amps. It is designed to protect single-phase motors within this current range.