POTTER & BRUMFIELD 
PM SERIES
HEAVY DUTY
25 AMP MULTICONTACT
AC OR DC POWER RELAY


File E22575 (PM & PMC)
File E22575 (PMF & PMT)
File LR15734

· Contact ratings to 25 amps.
· 8-32 screw or .25 Q.C. termination.
· AC and DC coils available.
· 4PDT contact arrangement.
· Plastic and metal covers available.

Arrangements: 4 Form A (4PST-NO) and 4 Form C (4PDT).
Ratings: PM & PMT:  25 amps @ 277VAC, max.; 10 amps @ 28VDC;
                    1HP @ 120/240VAC, Single Phase.
         PMC & PMF: 20 amps @ 240VAC, max.; 10 amps @ 28VDC;
                    1HP @ 120/240VAC, Single Phase.
Material: Silver-cadmium oxide.
Expected Life: 10 million operations, mechanical; 100,000 operations at
               rated loads @ 25C.

Voltage: From 6 to 220VDC and 6 to 480VAC, 50/60Hz.
Nominal Power: DC: 4.4W @ 25C.
               AC: 14VA @ 25C.
Duty Cycle: Continuous.
Finish: Impregnated with high quality electrical varnish.
Initial Insulation Resistance: 100 megohms, minimum.

           DC Coils                         AC Coils (50/60 Hz.)
           DC Resis.                                   DC Resis.
Nominal    In Ohms        Nominal           Nominal    In Ohms        Nominal
Voltage    +/-10%         Current In        Voltage    +/-15%         Current IN
           @ 25C          Milliamps                    @ 25C          Milliamps

  6            8.2        732                 6             .37       2,150
 12           33          364                12            1.4        1,070
 24          132          182                24            5.0          540
 48          526           91               120          120            128
110        2,760           40               240          587             61
125        3,570           35               480        1,790             32
220        Use a 110 volt relay with 2700 to 3300 ohm 5 watt
           wire wound resistor in series.

Must-Operate Voltage: 
  DC: 75% of nominal voltage @ +25C.
  AC: 85% of nominal voltage @ +25C.

Temperature Range: AC: -55C to +45C @ nominal coil power.
                   DC: -55C to +55C @ nominal coil power (+75C)
                       available on special order.

Mounting: Standard:  Three holes; one front key-hole and two rear
                     channel slots for #8-32 screws.
          Special:   Adaptor plate available for adapting these relays to a 
                     chassis pre-drilled for our PRD series relays.
Termination: PM  & PMC: Heavy-duty screw type with #8-32 BH screw.
             PMT & PMF: .250" (6.35mm) quick connect terminals.
Insulating Material: Molded polyester alkyd.
Enclosure: PMC & PMF: Shipped with pre-installed plastic dust cover.
           PM  & PMT: Plastic dust cover or metal enclosure available.
                      Order separately
Weight: 14oz (397 g) approx.