Hot Inquiry Model This Week: Siemens 3RV2421-4CA10 SIRIUS Transformer Protection Circuit Breaker
Core Market Update
This week, the inquiry volume for the Siemens 3RV2421-4CA10 SIRIUS Transformer Protection Circuit Breaker in the industrial power distribution spare parts market has surged by 68% week-on-week. It has become a top trending model for manufacturing plant control cabinet annual maintenance, mining site power distribution system safety compliance upgrade and water treatment plant transformer protection retrofitting projects. Over 70% of recent buyers specify original German-made Siemens units with full factory test reports, and most urgent on-site failure orders require 48-hour local dispatch to avoid unplanned power distribution system downtime.
Quick Model Overview
The 3RV2421-4CA10 is a high-performance size S0 dedicated transformer protection circuit breaker from Siemens SIRIUS 3RV2 series, purpose-built for full overcurrent, short-circuit and overload protection for industrial control transformers. It integrates protection, isolation and control functions in one compact unit, serving as the core safety barrier for all small and medium-sized industrial transformer loops.
- Protection Specs: CLASS 10 A-release adjustable 16–22A, N-release 364A instantaneous short-circuit trip
- Breaking Capacity: Standard high short-circuit breaking capacity, fully meets industrial transformer protection requirements
- Electrical Specs: 3-pole, 690V AC rated operating voltage, 22A rated operational current
- Installation: Standard 35mm DIN rail snap-on mounting, screw-type terminals for reliable wiring connection
- Operating Environment: -20℃ to +60℃ working temperature, 10–95% non-condensing humidity tolerance
- Mechanical Life: 100,000 typical operating cycles for main contacts, long service life under heavy industrial use
- Power Consumption: Only 10.5W total power loss at rated current, reduces control cabinet heat load
- Compatibility: 100% seamless matching with Siemens SIRIUS 3RV2 series system, no extra wiring modification required
Recent Inquiry Characteristics
Recent bulk inquiries for this model mainly come from three high-priority industrial scenarios:
- Preventive spare parts stock replenishment for large manufacturing plants during annual power distribution system overhaul window
- Transformer protection system upgrade for mining sites, replacing old breakers to meet new local work safety compliance standards
- Emergency on-site failure replacement for water treatment plant control transformer systems, restoring full protection functionality within 24 hours
Procurement Note
Many uncalibrated counterfeit and second-hand units of 3RV2421-4CA10 are circulating in the current market, which have far lower actual short-circuit breaking capacity than rated value and may cause serious electrical safety hazards. It is recommended to verify original Siemens German production traceability, 12-month full warranty and pre-shipment full protection characteristic test report before purchasing, to ensure long-term reliable safety protection for your critical industrial transformers.
