# Siemens 3TK2943-0BB4 Safety Relay Contactor - 3NO 24V DC

The **Siemens 3TK2943-0BB4 Safety Relay Contactor** is a crucial component for ensuring safety and reliability in industrial automation systems. This robust contactor, also known by the part number **3TK2943-0BB4**, is designed to provide dependable control in various electrical applications. This safety relay contactor is essential for applications requiring fail-safe operation, offering peace of mind and operational efficiency.

This safety relay contactor operates at DC 24V and adheres to VDE 0660 T.500 (04.94) and IEC 60947-1 (1999) standards. It features a 3S verz. 3NO configuration with a TV range of 1-4s and an IEAC-1 rating of 6A, ensuring consistent performance. The auxiliary contact B300/Q300 is rated at 6A/240V AC. The **3TK2943-0BB4** is suitable for general use with CU-wire at temperatures up to 60°C and can handle circuits up to 5000 RMS symmetrical amps at 300V. Manufactured in the Czech Republic, it weighs 740 grams.

Key Features:

-   **Safety-Focused Design:** Provides reliable protection in critical applications.
-   **Versatile Configuration:** Features a 3NO configuration for diverse control needs.
-   **High Voltage Compatibility:** Operates efficiently at DC 24V.
-   **Durable Construction:** Built to withstand demanding industrial environments.
-   **Compliance with Standards:** Meets VDE and IEC standards for assured quality.

Specifications:

-   Voltage: DC 24V
-   Configuration: 3NO
-   Standards: VDE 0660 T.500 (04.94), IEC 60947-1 (1999)
-   IEAC-1 Rating: 6A
-   Auxiliary Contact: B300/Q300 rated at 6A/240V AC

The **Siemens 3TK2943-0BB4** is a dependable choice for enhancing the safety and efficiency of your automation systems. Its robust design and compliance with industry standards make it an ideal solution for a wide range of applications. Improve your industrial systems with a contactor that offers reliability and performance. For more information, please contact [info@ramautomations.com](mailto:info@ramautomations.com).

## Details

- **Price:** 999.0 USD
- **Vendor:** Siemens
- **Type:** Industrial Automation > Safety Components > Safety Relays
- **Tags:** 24V DC, 3NO, 3TK2943-0BB4, automation systems, electrical control, industrial automation, safety contactor, safety relay, Siemens

## Variants

| Variant | Price | Available |
|---------|-------|-----------|
| Used | 999.00 USD | In stock |

## Images

- Siemens 3TK2943-0BB4 Safety Relay Contactor - 3NO 24V DC-Ram Automations

---

> Source: [Ram Automations](https://ramautomations.com/products/siemens-3tk2943-0bb4-safety-relay)
> Updated: 2026-10-02