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Siemens 48DA18AA4 Bimetal Thermal Overload Relay - 25A

Siemens 48DA18AA4 Bimetal Thermal Overload Relay

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ManufacturerSiemens

Part number48DA18AA4

Type Bimetal Thermal

Amperage 25A

Poles 1

Trip Class 10, 20

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Bimetal Trip Mechanism Ambient Compensated 1-Phase Application 1NC Auxiliary Contact Auto/Manual Reset Trip Class 10/20

Product description

The Siemens 48DA18AA4 is a bimetal thermal overload relay designed for single-phase motor protection. It features an adjustable trip class (10, 20) and a fixed 25 Ampere FLA rating. This relay is ambient compensated, ensuring stable operation across varying temperatures, and includes a 1NC auxiliary contact.

This overload relay is commonly used in applications such as single-phase motors in HVAC equipment, pumps, and small machinery. Its thermal bimetal mechanism provides reliable protection against overcurrent conditions that could lead to motor damage.

Stanlo Automation, a veteran-owned surplus parts distributor, offers the Siemens 48DA18AA4. We provide high-quality industrial components and dependable service to keep your operations running efficiently.

Technical specifications

Type	Bimetal Thermal
Amperage	25A
Poles	1
Trip Class	10, 20
Reset Type	Auto/Manual
Application	1-Phase
Auxiliary Contact	1NC
Mounting	Panel
Ambient Temperature	Compensated

Common applications

Single-Phase Motor Protection

HVAC Equipment

Pump Control

Small Machinery

Industrial Equipment

Compatible systems

Compatible with specific Siemens motor starters

Also known as

Siemens 48DA Overload Relay Class 48 Overload Thermal Motor Protector

Replaces / compatible with

The 48DA18AA4 is an open-type overload relay designed for panel mounting and is compatible with specific Siemens motor starters.

Technical note

Expert tip

This relay is designed for direct mounting on specific Siemens starters and requires appropriate fusing for short-circuit protection.

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Frequently asked questions

What is the trip class for the Siemens 48DA18AA4 overload relay?

The Siemens 48DA18AA4 overload relay features selectable trip classes of 10 and 20. This allows for adjustment based on the motor's operating characteristics and protection needs.