Product Description

3TK28251BB40 DISCONTINUED BY MANUFACTURER SAFETY RELAY SIRIUS DUAL CHANNEL 3 SAFETY CONTACTS 2 AUXILIARY CONTACTS 4 KV 6 AMP 230 VAC 24 VDC REPLACED BY 3SK1111-1AB30 The Siemens 3TK2825-1BB40 is a safety relay designed for use in safety-related control circuits, providing enhanced protection in industrial automation systems. This safety relay is part of the SIRIUS 3TK28 series, offering two NO (normally open) and one NC (normally closed) safety contacts, making it suitable for monitoring emergency stop functions, safety doors, and other critical safety mechanisms. It ensures high reliability and safety up to SIL 3 (Safety Integrity Level) and Category 4 according to EN 954-1. Compact and easy to install, this relay enhances safety while maintaining operational efficiency.

Technical Specifications

• Series: SIRIUS 3TK28
• Type: Safety relay
• Contacts: 2 NO + 1 NC
• Rated Control Supply Voltage: 24V DC
• Switching Capacity: 4A (AC-15 at 230V)
• Safety Standards: SIL 3 (IEC 61508), Category 4 (EN 954-1), Performance Level e (ISO 13849-1)
• Operating Temperature: -25°C to +60°C
• Mounting: DIN rail mount
• Protection Rating: IP20 (for terminals)
• Certifications: CE, UL, TÜV, and CSA approved