Product DescriptionThe SIEMENS 3RV29281K is a Type E phase barrier designed to provide electrical isolation between phases in motor starter and circuit breaker assemblies. Phase barriers prevent arc flash propagation and unintended contact between live conductors in multi-phase control panels. This accessory mounts directly within compatible Siemens circuit breaker or starter enclosures, supporting safe wiring and maintenance access. Electricians and panel builders install this component during new construction or retrofit work where phase separation is required by code or panel layout demands.This phase barrier is suited for use in industrial and commercial electrical panels where phase-to-phase isolation is required. It is commonly installed alongside motor protection circuit breakers and related switching devices in control cabinets, motor control centers, and distribution panels. The compact form factor allows it to fit into tight panel arrangements without interfering with adjacent components.Key FeaturesType E phase barrier provides physical separation between phase conductorsDesigned to reduce arc flash propagation risk within panel assembliesCompact dimensions of 3.189 inches x 1.969 inches x 2.165 inches allow installation in space-constrained enclosuresLightweight at 0.022 pounds for easy handling during panel assemblySold individually, one barrier per packCompatibilityDesigned as an OEM-style accessory for use with compatible Siemens motor protection circuit breaker and starter assemblies requiring Type E phase barrier separation.Installation NotesInstallation should be performed by a qualified electrician in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize the panel and verify absence of voltage with a meter before handling any panel components. The barrier should be seated firmly in the designated slot of the breaker or starter assembly before energizing. Do not modify the barrier or force it into incompatible enclosures.Technical SpecificationsType: E Phase BarrierLength: 3.189 inchesWidth: 1.969 inchesHeight: 2.165 inchesWeight: 0.022 poundsQuantity per Pack: 1UPC: 66264392539Standard InformationBrand: SIEMENSManufacturer Part Number: 3RV29281K