S307 – Cam switch elements

Single pole cam-operated switching elements for 250 A and 300 A

S307 C Cam switch element for 300 A with magnetic blowout
S307 A Cam switch element for 300 A without magnetic blowout

Cam-operated switching elements of Schaltbau are designed for DC and AC applications. Notwithstanding their compact design the series feature an extraordinary breaking capacity which is owed to the double-break contacts and long contact travel that make breaking the circuit a safe and reliable job.


  • Slim design
  • Double-break contacts
  • Variants:
    • S307 C and M for DC with magnetic blowout
    • S307 A and K for AC without magnetic blowout
  • Optional arc chamber

Arc chamber/arc chute

  • Optional, to be ordered separately
  • LK-S307: Arc chamber for cam switch elements S307 C and S307 G
  • LK-S307-DC: Arc chute for cam switch elements S307 G/N and S307 C/N with keyed hole for mounting the arc chute with correct polarity, suitable for high voltages

Special variant

  • Presented on this site are only stock items which can be supplied in short delivery time.
  • If you need a special variant feel free to contact us. Maybe the type of switching element you are looking for is among our many special designs. If not, we can also supply customized designs. In this case, however, minumum order quantities apply.


Type of voltageDC, AC
Main contacts, configuration1 x NC
Nominal voltage Un450, 750 V
Rated insulation voltage Ui630 V
Conv. thermal current Ith250, 300 A
Mechanical endurance5 million operating cycles
Show all data

Related Downloads

Catalogue B40
S306, S307 - Cam-operated switching elements
Safety instructions contactors
AFS / C100 / C110B / C130 / C137 / C152...C159 / C160 / C162 / C163 / C164 / C165 / C193 / C195 / C294 / C295 / C160 / C3xx / C8xx / C400 / C600 / CA / CF / CH / CL / CP / CPP / CS / CT / CU / S100/80 / S132 / S134 / S135 / S005 / S007 / S008 / S306 / S307 / S310