The TM210 trip unit gives fixed thermal-magnetic protection: overload Ir is permanently set at 25 A, and short-circuit pickup Ii is fixed at 12 times In (300 A). This is a line-protection breaker, not a motor-protection piece — the fixed thermal setting suits feeder or distribution duty where you don't need adjustable overloads. The UL 489 SB (naval) suffix means it carries naval shipboard certification on top of the standard UL 489 listing. That adds shock, vibration, and tilt testing per military-grade requirements — relevant if this lands in a marine or defense supply chain, not just a commercial panel.
RoHS compliance dated from January 1, 2017. That's typical for electrical contacts and solder joints in this class — not a showstopper for most industrial use, but worth flagging for any end-user with strict REACH downstream reporting obligations.
Integration notes
Terminal connection — line and load lugs are included. The 3VA4 frame accepts standard bus bar or cable connections. Panel builders should plan for the 160 x 135 x 88 mm envelope.