The Siemens 3RH2431-2B 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 3RH2431-1BB40 and 3RH2431-1BM40 are available. These relays typically feature 3 NO (normally open) + 1 NC (normally closed) contacts, operate at 24V DC or 220V DC, and are designed for industrial automation applications:

• Contact Configuration: 3 Normally Open (NO) + 1 Normally Closed (NC) contacts
• Control Voltage: 220V DC
• Current Rating: 10A
• Voltage Rating: 600V DC, 690V AC
• Mounting Style: DIN Rail Mount
• Operating Temperature Range: -25°C to +60°C
• Terminal Type: Screw terminals
• Compliance: IEC 60947-1, EN 60947-1, IEC 60947-4-1, EN 60947-4-1, IEC 60947-5-1, EN 60947-5-1