PBK-818B Hemispherical door release button Double function: NO/NC/COM Flush or Surface mount with MBB-811C-M

PBK-818B – Stainless Steel Door Release & Exit Button

The PBK-818B is a durable door release and exit button designed for access control systems and secure door unlocking applications. Featuring a hemispherical push button and a robust stainless steel construction, it provides long-lasting performance and high visibility for users in commercial, institutional, and professional environments. 

Engineered for reliable operation, the PBK-818B supports multiple contact configurations and is suitable for both flush and surface mounting (with an optional back box such as the MBB-811C-M). Its sturdy design and tested mechanical life make it a dependable choice for frequent use in security installations.

Key Features:

• Door release / exit push button for access control systems 

• Stainless steel housing with hemispherical metal button, ideal for public and professional spaces 

• Output contacts: NO / NC / COM for flexible integration with locks and access controllers 

• Current rating: up to 3 A @ 36 V DC max 

• Mechanically tested for high durability (up to ~500,000 activations) 

• Mounting options: flush or surface mount (with proper back box such as MBB-811C-M) 

• Operating conditions: approx. 10 °C to +55 °C, 0–95 % relative humidity 

• Compact dimensions: 86 × 86 × 40 mm 

• Suitable for a wide range of doors and access points