NEW ARRIVAL: Siemens SENTRON 3VA9988-0AA12 Auxiliary Switch Now Available
Model Description
We are pleased to announce the immediate availability of the Siemens SENTRON 3VA9988-0AA12 auxiliary switch changeover contacts, a compact 7mm-wide accessory engineered for 3VA1 and 3VA20-26 molded case circuit breakers. This HQ-type switch provides changeover contacts (1NO/1NC) in a slim, side-mount design that integrates seamlessly into the breaker accessory slot without increasing panel depth. The unit measures 56×7×30mm and weighs only 28g, making it ideal for space-constrained switchboards, control panels and OEM skid assemblies where reliable status signalling is required. The switch is powered directly by the breaker mechanism and draws no additional supply current, simplifying wiring and reducing installation time .
Key Features
The 3VA9988-0AA12 delivers robust electrical performance with 4kV impulse withstand and Pollution Degree 3 / Overvoltage Category III certification, ensuring reliable operation in harsh industrial environments. The switch handles thermal current up to 6A with full AC-12 (6A @ 240V AC) and DC-12 (6A @ 24V DC) ratings, while maintaining 3A AC-15 and 0.8A DC-13 switching capacity for inductive loads. Screw-type terminals accept conductors from 0.5–1.5mm² (AWG 20–16) with tightening torque 0.4–0.5N·m, ensuring secure connections that resist vibration. The unit operates reliably across –20°C to +70°C ambient range and carries CE, cULus, CCC, EAC and RoHS approvals (since June 2012), guaranteeing worldwide acceptance in utility, marine and industrial applications .
Related Models in the 3VA9 Accessory Family
The 3VA9 line offers complete breaker protection functionality in identical 7mm footprints. 3VA9907-0BB25 provides standard auxiliary contacts (1NO+1NC), while 3VA9910-0BB25 adds an alarm contact that latches on fault. 3VA9908-0BB25 supplies undervoltage release for generator backup systems, and 3VA9912-0BB25 delivers shunt-trip capability for remote electrical opening. 3VA9916-0BB25 enables mechanical interlocking between two breakers. All variants share the same mounting geometry, terminal layout and IP20 protection, enabling one-size panel cut-outs and unified wiring diagrams across 3VA1 (100–160A) and 3VA2 (100–630A) breaker families .
Our Competitive Advantages
As a dedicated Industrial Automation trader, we provide exceptional procurement flexibility and customer-centric service solutions. Our adaptable payment structures accommodate wire transfer arrangements and customized credit facilities for approved partners, removing financial barriers to urgent maintenance requirements. We maintain significant strategic inventory in regional distribution hubs, enabling delivery within 5-7 business days to most industrial centers worldwide. Our extensive sourcing network spans premium European and Asian sensor distribution channels, ensuring authentic Telemecanique component traceability without geographic restrictions. This multi-channel approach guarantees availability during global supply chain disruptions. Our application engineers provide sensor selection consultation, detection distance calculation, and integration support, assisting with control logic configuration and wiring optimization. Through direct manufacturer partnerships and streamlined logistics, we deliver genuine Telemecanique inductive sensors with accelerated fulfillment cycles and competitive pricing structures.
For immediate quotations or technical consultation, please contact our dedicated sales team.
About Us
We are a focused industrial-automation components trader committed to delivering authentic Siemens SENTRON protection solutions with speed, flexibility and technical expertise.