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3TH4454-0AN2
Siemens 3TH4454-0AN2 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 3TH4454-0AN2 is a 3TH4 series auxiliary contactor designed for industrial control and switching applications. It combines five normally open and four normally closed auxiliary contacts with mechanical latching, providing dependable circuit control while retaining its switching position. The unit operates from a 220 V AC control supply at 50/60 Hz and supports AC-15 operational currents of 10 A at 230 V and 6 A at 400 V. Screw terminals provide secure electrical connections, while snap-on or screw mounting enables installation on a 35 mm DIN rail. Its compact size 0 housing measures 55 mm wide, 78 mm high and 140 mm deep, with finger-safe protection and an operating temperature range of -25°C to +55°C.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3TH4454-0AN2 |
| Alternative Part Number | 3TH44540AN2 |
| Product Type | Auxiliary contactor relay |
| Product Series | 3TH4 |
| Contactor Size | Size 0 |
| Contact Identification | 54, according to EN 50011 |
| Contact Configuration | 5 normally open (NO) and 4 normally closed (NC) auxiliary contacts |
| Changeover Contacts | None |
| Operating Mechanism | Mechanically latched |
| Control Voltage Type | AC |
| Rated Control Voltage | 220 V AC |
| Control Frequency | 50/60 Hz |
| Rated Operational Current at 230 V | 10 A, AC-15 |
| Rated Operational Current at 400 V | 6 A, AC-15 |
| Terminal Type | Screw terminals for auxiliary and control circuits |
| Mounting Method | Snap-on mounting to a 35 mm DIN rail or screw mounting |
| Reference Designation | K, according to DIN EN 81346-2 |
| Operating Temperature | -25°C to +55°C |
| Front Protection Rating | IP20 |
| Electrical Shock Protection | Finger-safe design |
| Width | 55 mm |
| Height | 78 mm |
| Depth | 140 mm |
| B10 Value | 1,000,000 operations at 0.3 × rated operational current |
| Proof-Test Interval or Service Life | 20 years according to IEC 61508 |
What type of device is this component?
It is a Siemens 3TH4 auxiliary contactor, also known as a contactor relay. It is designed to switch multiple auxiliary and control circuits within industrial control panels.
How many auxiliary contacts does it have?
The device provides nine auxiliary contacts: five normally open contacts and four normally closed contacts. It has no changeover contacts.
What does the contact configuration 5NO + 4NC mean?
It means the contactor relay has five normally open contacts that close when operated and four normally closed contacts that open when operated.
What control voltage does the coil require?
The coil requires a 220 V AC control supply and is rated for operation at both 50 Hz and 60 Hz.
Does this contactor relay include mechanical latching?
Yes. The unit has a mechanical latching mechanism, allowing it to retain its switched state mechanically rather than relying on continuous coil energisation.
What are its AC-15 operational current ratings?
For AC-15 control-duty applications, the rated operational current is 10 A at 230 V AC and 6 A at 400 V AC.
How is the device mounted?
It supports screw mounting and snap-on installation onto a 35 mm standard mounting rail in accordance with DIN EN 50022.
What type of electrical terminals are provided?
The auxiliary and control circuits use screw-type terminals, providing conventional wired connections for control-panel installation.
What are the component's dimensions?
The contactor relay measures approximately 55 mm wide, 78 mm high and 140 mm deep. These dimensions should be checked against the available panel space before installation.
What operating temperature range is specified?
The specified ambient operating temperature range is from -25°C to +55°C.
What is the front protection rating?
The front of the device is rated IP20, helping to prevent access by fingers and similarly sized solid objects when correctly installed.
What does the switching-element identification code 54 indicate?
The identification code 54 denotes the contact arrangement used by this auxiliary contactor: five normally open contacts and four normally closed contacts.
Are any contacts delayed or make-before-break?
No. The specified normally open and normally closed contacts are standard switching contacts, with no delayed, leading, lagging or make-before-break contact functions.
Where is this type of contactor relay commonly used?
It is commonly used in industrial control cabinets for interlocking, signalling, sequence control, status indication and multiplying control contacts.
What should be checked before replacing an existing contactor relay?
Confirm the 220 V AC coil voltage, 50/60 Hz frequency, 5NO + 4NC contact arrangement, mechanical-latching requirement, AC-15 current ratings, terminal style, mounting method and physical dimensions.
- Industrial control panel switching and auxiliary control duties
- Motor starter interlocking and control sequence management
- Mechanical latching of control states following coil activation
- Machine automation circuits requiring multiple auxiliary contacts
- Signal switching using five normally open and four normally closed contacts
- Conveyor, pump, fan and compressor control applications
- Status indication and alarm circuit activation
- Electrical interlocking between contactors and control devices
- Relay logic circuits operating from a 220 V AC control supply
- Control cabinet installations using 35 mm DIN rail or screw mounting
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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Customer reviews
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Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
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