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3TH4244-0BG4
Siemens 3TH4244-0BG4 available at EU Automation. Get in touch today for a quick price.
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3TH4244-0BG4 is an auxiliary contactor relay designed for switching and interlocking duties in industrial control circuits. Part of the Siemens 3TH4 range, it features four normally open and four normally closed contacts, providing a versatile arrangement for control logic, signalling and sequencing applications. Its coil operates on a rated 125 V DC supply.
Rated operational currents under AC-15 utilisation are 10 A at 230 V AC and 6 A at 400 V AC. Screw-type terminals provide connections for the auxiliary and control circuits, while screw mounting or snap-on installation onto a 35 mm DIN rail offers flexibility within control panels.
Measuring 78 mm high, 45 mm wide and 135 mm deep, this size 0 contactor relay has a specified operating ambient temperature range of −25 °C to +55 °C.
Rated operational currents under AC-15 utilisation are 10 A at 230 V AC and 6 A at 400 V AC. Screw-type terminals provide connections for the auxiliary and control circuits, while screw mounting or snap-on installation onto a 35 mm DIN rail offers flexibility within control panels.
Measuring 78 mm high, 45 mm wide and 135 mm deep, this size 0 contactor relay has a specified operating ambient temperature range of −25 °C to +55 °C.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3TH4244-0BG4 |
| Alternative Part Number | 3TH42440BG4 |
| Product Type | Contactor relay / auxiliary contactor |
| Product Description | DC-operated auxiliary contactor featuring eight switching contacts for industrial control circuits, with screw terminals and a choice of screw or DIN rail mounting. |
| Product Series | 3TH4 |
| Contactor Size | 0 |
| Rated Control Supply Voltage | 125 V DC |
| Contact Configuration | 4 normally open (NO) and 4 normally closed (NC) contacts |
| Contact Switching | Non-delayed |
| Switching Element Identification | 44E |
| Rated Operational Current, AC-15 | 10 A at 230 V AC; 6 A at 400 V AC |
| Terminal Type | Screw-type terminals for auxiliary and control circuits |
| Mounting Method | Screw mounting or snap-on mounting onto a 35 mm DIN rail |
| Height | 78 mm |
| Width | 45 mm |
| Depth | 135 mm |
| Ambient Operating Temperature | −25 °C to +55 °C |
What type of device is this?
The Siemens 3TH4244-0BG4 is an auxiliary contactor relay from the 3TH4 range. It provides eight auxiliary contacts for switching control circuits.
What control supply voltage does it require?
The coil requires a rated control supply of 125 V DC. This voltage is separate from the AC operating voltages specified for the auxiliary contacts.
How many normally open and normally closed contacts are provided?
The relay has four normally open contacts and four normally closed contacts. This arrangement is identified by the switching element designation 44 E.
What are the contact current ratings?
The rated operational current under the AC-15 utilisation category is 10 A at 230 V AC and 6 A at 400 V AC. These ratings should not be treated as universal ratings for every load type.
How is the relay mounted?
It supports screw mounting or snap-on mounting onto a 35 mm DIN rail, providing two installation options for control panels.
What are the overall dimensions?
The relay measures 78 mm high, 45 mm wide and 135 mm deep. These are the device dimensions; additional space may be needed for wiring and installation access.
What type of electrical terminals does it use?
Screw-type terminals are provided for both the auxiliary circuits and the control circuit.
What is the permitted operating temperature range?
The specified ambient temperature during operation is −25 °C to +55 °C. Panel conditions should remain within this range.
Does it include time-delayed contacts?
No. The specified contact arrangement has no delayed-switching contacts, leading contacts, lagging contacts or make-before-break contacts.
Are changeover contacts included?
No. The 3TH4244-0BG4 has four normally open and four normally closed contacts, with no changeover contacts.
What contactor size is specified?
The manufacturer’s datasheet identifies the contactor as size 0.
Which standard is referenced for the contact arrangement?
The relay is described with the contact arrangement designation 44 E according to DIN EN 50011.
- Switching auxiliary control circuits in industrial panels with a 125 V DC control supply.
- Implementing relay-based sequencing for machinery and automated production equipment.
- Providing electrical interlocking between contactors to prevent conflicting operating commands.
- Expanding control arrangements with four normally open and four normally closed contacts.
- Operating status indicators and signalling circuits to show equipment conditions.
- Coordinating contactor commands in motor starter panels without switching motor loads directly.
- Replacing matching auxiliary contactors in existing 35 mm DIN rail or screw-mounted control assemblies.
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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