Otto
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Temporarily out of stock - back order for despatch 01/05/2014
  • RS Stock No. 294-331
  • Manufacturer Otto
  • Mfr. Part No. R2AA221NNNNN
  • RoHS Status
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Specifications
Contact ConfigurationSPST
Contact Current Rating15 A@ 110 V ac, 15 A@ 28 V dc
Contact MaterialGold Over Nickel Plated Silver Alloy
Depth24.38mm
Height58.67mm
Maximum Operating Temperature+85°C
Mechanical Life100000Operations
Minimum Operating Temperature-40°C
Mounting TypePanel Mount
Number of Contacts1
Number of Switch Positions2
Terminal TypeTab
Voltage Rating110 V ac, 28 V dc
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IP68 Rotary Switches, Otto R2 Series

Used in the heavy equipment, marine, process control and instrumentation markets, the Otto R2 rotary switch is an excellent
replacement for rocker switches, offering improved visual indication, additional lighting options and different styling on front panels. The R2 is a sealed, lighted rotary switch which snaps into a 1.475” x 0.875" industry standard rocker switch panel cut-out.
The R2 rotary switch provides up to three positions in various combinations of momentary and maintained action. It is
capable of handling loads from logic level up to 20 amps resistive. Sealing is to IP68S via a shaft O-ring seal in front and a potted base in the back.
The R2 offers lighting options including up to three independent LED light positions which illuminate a lens on the rotary knob.

Rated 16A at 110Vac and 20A at 12/28Vdc
Connection via .250" fast on terminals
Keyed connection pin
Black soft touch selector knob (apart from stock numbers 294-331 and 294-246 which are plain black)

Additional Info
Stk No. Manufacturer Part No. Contacts Positions Knob Position Switching Action Circuit1 Circuit2 LED Colour LED Voltage
294-331 R2 AA 22 1 N NNNN SPDT 2 A/C (10 & 2 o'clock) Maintain; Momentary on; (off) N/A N/A N/A
294-246 R2 AA 11 1 N NNNN SPDT 2 A/B (10 & 12 o'clock) Maintain; Maintain on; off N/A N/A N/A
737-3829 R2 AB 21 1 N C1N2 SPDT 2 A/C (10 & 2 o'clock) Maintain; Maintain on; off N/A Red; Green 12V
737-3822 R2 AB 11 1 1 NNNN DPDT 2 A/B (10 & 12 o'clock) Maintain; Maintain on; off on; off N/A N/A
737-3835 R2 AB 21 2 2 NNNN DPDT 2 A/C (10 & 2 o'clock) Maintain; Maintain off; on off; on N/A N/A
737-3838 R2 AB 21 2 2 C1N3 DPDT 2 A/C (10 & 2 o'clock) Maintain; Maintain off; on off; on Red; Amber 12V
737-3831 R2 AB 21 2 2 C2N1 DPDT 2 A/C (10 & 2 o'clock) Maintain; Maintain off; on off; on Green; Red 12V
737-3825 R2 AB 13 2 2 C12N DPDT 2 A/B (10 & 12 o'clock) Momentary; Maintain (off); on (off); on Red; Green 12V
737-3850 R2 AB 44 5 5 NNNN DPDT 3 A/B/C (10,12 & 2 o'clock) Maintain; Maintain; Maintain on; off; on on; off; on N/A N/A
737-3847 R2 AB 44 5 5 C1N2 DPDT 3 A/B/C (10,12 & 2 o'clock) Maintain; Maintain; Maintain on; off; on on; off; on Red; N/A; Green 12V
737-3841 R2 AB 44 5 5 C232 DPDT 3 A/B/C (10,12 & 2 o'clock) Maintain; Maintain; Maintain on; off; on on; off; on Green; Amber; Green 12V
737-3844 R2 AB 44 4 9 DN11 DPDT 3 A/B/C (10,12 & 2 o'clock) Maintain; Maintain; Maintain off; on; on off; off; on N/A; Red; Red 24V
737-3853 R2 AB 45 4 5 NNNN DPDT 3 A/B/C (10,12 & 2 o'clock) Momentary; Maintain; Momentary (off); on; (on) (on); off; (on) N/A N/A
737-3869 R2 AB 45 5 5 NNNN DPDT 3 A/B/C (10,12 & 2 o'clock) Momentary; Maintain; Momentary (on); off; (on) (on); off; (on) N/A N/A
737-3857 R2 AB 45 5 5 C3N3 DPDT 3 A/B/C (10,12 & 2 o'clock) Momentary; Maintain; Momentary (on); off; (on) (on); off; (on) Amber; N/A; Amber 12V
737-3866 R2 AB 45 5 5 D2N2 DPDT 3 A/B/C (10,12 & 2 o'clock) Momentary; Maintain; Momentary (on); off; (on) (on); off; (on) Green; N/A; Green 24V

Panel Mounting, Signal

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