The Siemens 3RH2440-2B appears to be a contactor relay from the SIRIUS series. While I couldn't find an exact match for this specific model, similar models like 3RH2440-1AP00 and 3RH24401BB40 are available. These relays typically feature 4 NO (normally open) contacts, operate at 24V DC or 230V AC, and are designed for industrial automation applications.

• Contact Configuration: 4 Normally Open (NO) contacts
• Control Voltage: 230V AC, 50/60 Hz
• Current Rating: 10A
• Voltage Rating: 690V AC
• Mounting Style: DIN Rail Mount
• Operating Temperature Range: -25°C to +60°C
• Terminal Type: Screw terminal