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Description

The Siemens 3TH4355-0B is a SIRIUS 3TH43 series contactor relay with 10 fixed contacts rated for DC coil operation. This unit carries identification number 55E per EN 50011 and conforms to IEC 60947-5-1 and DIN VDE 0660. The full catalog number for the 24V DC coil variant is 3TH4355-0BB4. Refer to manufacturer documentation to confirm compatibility with your specific application.

This contactor relay provides 10 poles in a 5 NO + 5 NC fixed contact configuration, enabling simultaneous switching of up to 10 auxiliary circuits. The coil operates on 24V DC. Electrical connection for both the auxiliary and control current circuit is via screw terminal. Contact current rating is 10A, with a rated operational current of 6A at 400V AC. Contacts are positively driven, making this relay suitable for safety circuit applications.

The 3TH4355-0B mounts via snap-on to a 35mm DIN rail (EN 500). The terminal designations are standard-compliant per EN 50011, and the screw terminals are finger-safe. The unit is UL listed and CSA certified for worldwide use, and is approved to IEC and UL/CSA standards. Contacts cannot be replaced on 3TH43 series contactor relays.

Technical Specifications

Brand: Siemens
MPN: 3TH4355-0B
Full Catalog Number (24V DC Coil): 3TH4355-0BB4
Type: Contactor Relay (Auxiliary Contactor)
Series: SIRIUS 3TH43
Identification Number: 55E
Number of Poles: 10
Contact Configuration: 5 NO + 5 NC
Contact Current Rating: 10A
Rated Operational Current (Ie) at 400V AC: 6A
Coil Voltage: 24V DC
Coil Operation Type: DC
Terminal Type: Screw Terminal
Mounting Style: 35mm DIN Rail (Snap-On, EN 500)
Protection Class (IP): IP20
Ambient Operating Temperature: -25 to +55°C
Contact Drive Type: Positively Driven
Standards: EN 50011, IEC 60947-5-1, DIN VDE 0660
Certifications: UL Listed, CSA Certified
Country of Origin: Turkey

Condition: New — Open Box. Sourced from manufacturing MRO turnover, plant closures, and industrial surplus; the part is new and unused but may have been in storage for years. Packaging may show shelf wear or be missing.

Shipping & Handling

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Returns

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About ACME MRO Solutions

We started ACME MRO Solutions to fix something we kept running into as contractors — plants down, parts slow, surplus listings you couldn't trust. Our goal is simple: get YOU the right component fast, with an honest description, so you can get back to running.

We describe what we see. Used items show signs of use; if a part has visible wear, damage, or a missing component, the condition description will say so. We don't claim anything is tested unless we tested it — and we don't bench-test parts where testing isn't practical or revealing (feed-through modules, breakers, mechanical components). When we do test something, we'll say so explicitly.

If something is our fault, we don't work through it — we make it right. We are proud to serve American manufacturing. Your uptime is our bottom line.

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Questions? Talk to us.

Send a message through eBay. During business hours we typically respond within the hour. Whether you need to confirm compatibility before buying, request additional photos, ask about a cross reference, or work through something after delivery — message first and we'll figure it out together.