The Secutron MP-300S is an EOL resistor plate – (one per zone) 3.9k 1/2W, stainless steel for use in commercial fire alarm and life safety systems. As a genuine OEM replacement part, it is engineered to Secutron standards and integrates with Secutron MR-2100, MR-2200, and conventional panels. The Secutron MP-300S is designed for use with Secutron MR-2100, MR-2200, and conventional panels. Always verify compatibility with your specific system configuration and firmware version. Contact Life Safety Consultants for pre-sale technical assistance.