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Siemens 3SB3400-0C contact block for industrial control systems

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Siemens 3SB3400-0C

by Siemens

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OverviewThe Siemens 3SB3400-0C is an industrial-grade contact block designed for precision and durability within demanding control environments. Engineered for simple front panel installation, this component streamlines both setup and ongoing upkeep. It features a single Normally Closed (NC) contact, providing essential circuit interruption upon activation, making it perfect for critical safety applications and interlock mechanisms. Its screw terminals ensure a secure electrical connection, vital for continuous operation in industrial settings. While the 3SB3400-0C is no longer in production, its reputation for consistent performance endures. The SIRIUS ACT 3SU1400-1AA10-1CA0 is recommended as its modern equivalent, offering updated features and compliance with current industrial standards.Key Features Dependable NC Contact: Equipped with one Normally Closed (NC) contact for reliable circuit control. Secure Connections: Robust screw terminals guarantee stable electrical connections in industrial use. Simple Installation: Designed for convenient and secure mounting directly onto control panels. Broad Compatibility: Integrates smoothly with various Siemens push buttons and indicator lights. Industrial Durability: Built to endure rigorous industrial conditions, ensuring extended service life. Space-Saving Design: Compact dimensions allow for efficient use of cabinet space. Eco-Conscious: Compliant with RoHS environmental standards for responsible manufacturing. Technical SpecificationsManufacturer Part Number: 3SB3400-0CContact Arrangement: 1 NC (Normally Closed)Terminal Type: Screw terminalsMounting Method: Front plate mountingContact Rating: 10 A at 300 V ACDimensions (Approximate): 50 mm (W) x 63.5 mm (H) x 77 mm (D)Net Weight (Approximate): 0.011 kgCompliance: RoHS compliant since July 1, 2006Recommended Successor: SIRIUS ACT 3SU1400-1AA10-1CA0 (for new designs)Applications Emergency Stop Functions: Critical for safety circuits, ensuring immediate power cut-off. Motor Management: Used in start/stop operations, interlocks, and protective layouts for motors. Process Automation: Essential for managing various stages of automated processes and signaling equipment status. Machine Safety Guarantees: Prevents machine operation when safety conditions are not met. Control Panel Integration: Provides reliable signaling within electrical control panels. HVAC Systems: Can be used for control and signaling within heating, ventilation, and air conditioning setups. Why Choose This Model? Siemens Quality Assurance: Benefit from the renowned engineering excellence of the Siemens brand. Enhanced Operational Safety: The Normally Closed contact ensures fail-safe functioning in critical safety applications. Effortless System Integration: Designed for seamless compatibility with existing Siemens control components. Robust Construction: Built for longevity in harsh industrial surroundings, reducing maintenance. Straightforward Setup: Front plate mounting and screw terminals facilitate quick and secure installation. Optimized Performance: Provides precise and consistent electrical contact for overall system efficiency. Order NowEnsure the reliability and safety of your industrial control systems with the Siemens 3SB3400-0C contact block. While this specific model has been discontinued, its robust design and critical functionality make it a valuable component for maintaining existing installations or as a direct replacement where applicable. For new projects, explore the recommended successor.FAQWhat is the primary function of the Siemens 3SB3400-0C?The Siemens 3SB3400-0C functions as a contact block with a single Normally Closed (NC) contact, providing circuit interruption for safety and control applications.Is this product still actively manufactured by Siemens?No, the Siemens 3SB3400-0C has been discontinued. However, it remains a suitable component for existing systems or as a direct replacement.What is the recommended successor for new installations?For new designs and installations, the SIRIUS ACT 3SU1400-1AA10-1CA0 is the recommended modern successor to the 3SB3400-0C.What type of mounting does this contact block use?The 3SB3400-0C is designed for straightforward front plate mounting, allowing for easy installation on control panels.What kind of terminal connections does it feature?This contact block utilizes secure screw terminals, ensuring stable and vibration-resistant electrical connections for reliable performance.

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PRODUCT DETAILS

Siemens 3SB3400-0C

Overview

This is a genuine Siemens component. PalmPartsSolution stocks it in new, refurbished, and surplus condition with tested warranty and same-day shipping on in-stock units.

Whether you are sourcing a like-for-like replacement for an existing installation, an emergency spare to keep a line running, or a qualified part for a new build, our team can confirm availability, revision, and lead time before you order.

Key Features

  • Genuine Siemens catalog part
  • Tested before shipment
  • Backed by PalmPartsSolution warranty
  • Cross-reference and revision assistance available
  • Compatible with the broader Siemens automation ecosystem

Compatibility

When ordering, match the full catalog/part number, hardware revision, and firmware revision called out by your Siemens equipment. Where applicable, confirm:

  • Input/output voltage and current rating
  • Communication protocol and network role
  • Mounting form factor and footprint
  • Operating temperature, humidity, and IP rating
  • Required certifications (UL, CE, ATEX, marine, etc.)

Not sure which revision you need? Send us the catalog number on the nameplate and we will confirm the correct match.

Replacement Information

Three ways to source this part through PalmPartsSolution:

  1. Exact replacement — same Siemens catalog number, new or refurbished, tested and warrantied
  2. Form-fit-function equivalent — alternate revision or build that drops in without code changes
  3. Engineered migration — current-generation Siemens platform with documented conversion notes

Contact our engineering team if you need help choosing between these tracks.

Technical Specifications

Manufacturer Part Number: 3SB3400-0C

Contact Arrangement: 1 NC (Normally Closed)

Terminal Type: Screw terminals

Mounting Method: Front plate mounting

Contact Rating: 10 A at 300 V AC

Dimensions (Approximate): 50 mm (W) x 63.5 mm (H) x 77 mm (D)

Net Weight (Approximate): 0.011 kg

Compliance: RoHS compliant since July 1, 2006

Recommended Successor: SIRIUS ACT 3SU1400-1AA10-1CA0 (for new designs)

Applications

  • Emergency Stop Functions: Critical for safety circuits, ensuring immediate power cut-off.
  • Motor Management: Used in start/stop operations, interlocks, and protective layouts for motors.
  • Process Automation: Essential for managing various stages of automated processes and signaling equipment status.
  • Machine Safety Guarantees: Prevents machine operation when safety conditions are not met.
  • Control Panel Integration: Provides reliable signaling within electrical control panels.
  • HVAC Systems: Can be used for control and signaling within heating, ventilation, and air conditioning setups.

Why Choose the 3SB3400-0C?

  • Siemens Quality Assurance: Benefit from the renowned engineering excellence of the Siemens brand.
  • Enhanced Operational Safety: The Normally Closed contact ensures fail-safe functioning in critical safety applications.
  • Effortless System Integration: Designed for seamless compatibility with existing Siemens control components.
  • Robust Construction: Built for longevity in harsh industrial surroundings, reducing maintenance.
  • Straightforward Setup: Front plate mounting and screw terminals facilitate quick and secure installation.
  • Optimized Performance: Provides precise and consistent electrical contact for overall system efficiency.

Availability & Shipping

  • In stock: 3SB3400-0C ready for immediate dispatch from our Florida warehouse.
  • Free USA shipping: FedEx Priority (2–5 business days) and UPS Ground (3–5 business days). Expedited options available at checkout.
  • Worldwide delivery: FedEx International Priority (1–5 days), UPS International Priority (3–5 days), and USPS International (5–10 days) — rates calculated at checkout.
  • Bulk pricing: Volume discounts on request — contact our sales team for quantity quotes.
  • Buy with confidence: Every 3SB3400-0C ships with a 1-Year PALM Parts warranty and a 30-day return window.
SUPPORT

Frequently Asked Questions — Siemens

The Siemens 3SB3400-0C functions as a contact block with a single Normally Closed (NC) contact, providing circuit interruption for safety and control applications.

Machine down? We ship parts the same day.

New, surplus, and refurbished Siemens inventory in stock. Request a quote or speak directly with an automation specialist for emergency sourcing.

CUSTOMER REVIEWS

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PALM Parts Solution operates as an independent industrial automation supplier and is not an authorized distributor or affiliate of any listed manufacturer or brand name. Manufacturer trademarks and product names are used solely for identification purposes. Original manufacturer warranties do not apply. All products sold by PALM Parts are backed by our own 1-year warranty.

Product Condition & Firmware

All products are sold as new unless stated otherwise. Original manufacturer packaging may show signs of handling, storage, or shelf wear. Date codes and series may vary from current factory production. PALM Parts does not guarantee the presence, version, or compatibility of any firmware on PLC or automation products.

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PALM Parts Solution sells used surplus products. PALM Parts Solution is not an authorized distributor, affiliate, or representative for the brands we carry. Products sold by PALM Parts Solution come with PALM Parts Solution's 1-Year Warranty and do not come with the original manufacturer's warranty. Designated trademarks, brand names and brands appearing herein are the property of their respective owners. This website is not sanctioned or approved by any manufacturer or tradename listed.

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