Transformers supply and expand power for fire alarm control panels and notification circuits. The common case is a NAC power expansion transformer that raises the available notification current when a panel's built-in supply cannot carry all the horns and strobes on a circuit.
Size by the total notification load, not by device count — candela setting drives strobe current, so two apparently identical devices can draw very different amounts. Confirm the primary voltage available at the panel location (120V or 240V) and that the unit is listed for fire alarm service.
Resideo
Resideo RC840T-347 347v Relay w/ Built In 24V Transformer
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Regular price$127.98
Not in stock - available on backorder - lead time on request
Resideo
Resideo RC840T-277 277v Relay w/ Built In 24V Transformer
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Regular price$114.18
Not in stock - available on backorder - lead time on request
Resideo
Resideo RC840T-240 240v Relay w/ Built In 24V Transformer
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Regular price$111.12
Not in stock - available on backorder - lead time on request
Resideo
Resideo RC840T-120 120v Relay w/ Built In 24V Transformer
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Regular price$88.80
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Resideo
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Resideo
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Regular price$196.86
Not in stock - available on backorder - lead time on request
Resideo
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Regular price$118.80
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Resideo
Resideo RA832A1082 240V Switching Relay with Internal Transformer, DPST Switching, RA832A1082
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Not in stock - available on backorder - lead time on request
Resideo
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Resideo
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8845U1003 Universal Switching Relay w/ Internal Transformer, R8845U1003
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R847A1085 120V, 50/60 Hz Heavy Duty Switching Relay w/ Integral Transform, DPST or SPST Line Voltage Relays, R847A1085
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Regular price$183.90
Not in stock - available on backorder - lead time on request
Resideo
Resideo R845A1030 Switching Relay w/ Internal Transformer DPST Line Voltage Relays, R845A1030
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8285D5001 50 VA Fan Center w/ DPST Switch Includes R8222U, R8285D5001
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Regular price$76.92
Not in stock - available on backorder - lead time on request
Resideo
Resideo R8285B1053 40 VA Fan Center w/ DPDT Switch, Includes R8222B, R8285B1053
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Regular price$100.08
Not in stock - available on backorder - lead time on request
Resideo
Resideo R8285A1048 40 VA Fan Center w/ SPDT Switch Includes R8222B, R8285A1048
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8285B1038 50 VA Fan Center w/ DPDT Switching Action, includes R8222D
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8239B1076 50 VA Fan Center w/ DPDT Switching Action, Includes R8222D, R8239B1076
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8239B1043 40 VA Fan Center w/ DPDT Switching Action, Includes R8222D, R8239B1043
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8239A1052 40 VA Fan Center w/ SPDT Switching Action, Includes R8222B, R8239A1052
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Resideo
Resideo R8184M1051 Protectorelay Oil Burner Control with 45 seconds Lock Out Timing, R8184M1051
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8184G4082 Protectorelay Oil Burner Control with 45 Seconds Lock Out Timing, with Remote Alarm Dry Contacts, R8184G4082
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Not in stock - available on backorder - lead time on request
Resideo
Resideo R8184G4033 Protectorelay Oil Burner Control with 30 Seconds Lock Out Timing, R8184G4033
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Not in stock - available on backorder - lead time on request
Resideo
Resideo L8148J1009 Aquastat Relay, 8-Degree(F) Differential, L8148J1009
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Not in stock - available on backorder - lead time on request