Siemens 3RV2021-0JA10 - Circuit Breaker | AmpState

Siemens 3RV2021-0JA10 is a molded case circuit breaker built for dependable branch circuit overcurrent and short-circuit protection in panelboards and load centers. Designed to help electricians maximize panel space without compromising safety, this unit delivers consistent protection when it matters most.

Why this breaker stands out

• Compact molded-case design saves panel space and simplifies wiring layouts, making it ideal for tight panels and retrofit projects.
• Thermal-magnetic trip unit provides stable, repeatable protection performance across a range of temperatures and load conditions, reducing nuisance trips.
• OEM compatibility engineered to work with matching Siemens OEM load centers and panelboards for a seamless, reliable fit.
• Versatile for multiple environments suitable for residential, commercial, and light industrial applications where dependable protection is essential.

Technical snapshot

• Manufacturer: Siemens
• Part Number: 3RV2021-0JA10
• Type: Thermal-magnetic molded case circuit breaker
• Application: Branch circuit overcurrent and short-circuit protection

Ideal use cases

• Replacing aging or failed breakers in residential panels to restore reliable protection quickly and safely.
• Upgrading small commercial or light industrial panels where space is at a premium and consistent trip characteristics are needed.
• Installing compatible Siemens panelboards and load centers to maintain optimal performance and system compatibility.

What problems it solves

• Prevents damage from overcurrents and short circuits by providing fast, predictable disconnection.
• Minimizes panel depth requirements thanks to its compact design, enabling neater, more accessible wiring layouts.
• Delivers repeatable protection across varying operating conditions, improving reliability for critical circuits.

Professional installation is recommended to ensure proper fit and compliance with electrical codes. With the Siemens 3RV2021-0JA10, you gain durable, precise protection for your panelboard or load center—the kind of reliability that keeps your electrical system running smoothly.