Relays Parts for Commercial & Industrial Use for Sale
For affordable prices on electrical relays and components, visit midwestsupplyus.com. Midwest Supply is a trusted electronics parts shop that offers affordable prices and free shipping on orders over $999.
All Manufacturers
prev
next
View Details

90295 | Relay 903 General Purpose Single Pole Double Throw 208/240 Volt | Mars Controls
Brand: Mars Controls
SKU: 90295
View Details

86388 | Repair Kit Term-Lok Stake On 3 Wire 10 Gauge Brass Stake for Compressor | Mars Controls
Brand: Mars Controls
SKU: 86388
View Details

110000 | Switch 2 Cutoff Replacement 120/240 Volt | Mcdonnell Miller
Brand: Mcdonnell Miller
SKU: 110000
View Details

S1-6182277 | Relay Overload with Mount 600 Volts 16 to 20 Amps 3 Position | York
Brand: York
SKU: S1-6182277
View Details

S1-02426089000 | Relay Time Delay Motor for Coleman and Evcon Equipment | York
Brand: York
SKU: S1-02426089000
View Details

S1-02425391700 | Relay Start 60 Hertz 332/336 Volt for Compressor | York
Brand: York
SKU: S1-02425391700
View Details

510312250 | Switch Control High Limit SPST 140 to 240 Degrees Fahrenheit | Weil Mclain
Brand: Weil Mclain
SKU: 510312250
View Details

80160127 | Relay SPST with Pilot Duty Contacts | Burnham Boilers
Brand: Burnham Boilers
SKU: 80160127
View Details

80160096 | Relay Plug-In for Blower/Gas Fired Boiler | Burnham Boilers
Brand: Burnham Boilers
SKU: 80160096
View Details

90380 | Relay 903 Heavy Duty Normally Open/Normally Closed Universal Bracket 24 Volt | Mars Controls
Brand: Mars Controls
SKU: 90380
View Details

90370 | Relay 903 Single Pole Double Throw Heavy Duty Universal Bracket 24 Volt | Mars Controls
Brand: Mars Controls
SKU: 90370
Amperage
Application
- 10C055
- Air Conditioning
- Air Conditioning; Refrigeration; Heating and Fan Control
- BPGM 036-060
- BPGM; DBUC-W;X; DCUC-W;X
- Coleman Equipment
- Coleman and Evcon Equipment
- Compressor
- E0124700 C-BLR
- Furnace
- HVACR Equipment
- Heating and Air Conditioning System
- IN3-IN6PV/IN3-IN12 Boilers
- Industrial
- Logano GA124 Special Gas-Fired Boiler
- Low Water Cut Offs Water Feeder
- OMC/OMD/OME Furnace
- PFG Boilers
Approvals
Collection
Electrical Rating
Part Number
Product Type
- 1 DPST 2 Switch 1-20SEC
- 1 DPST 2 Switch 1-24SEC 240V
- 1 DPST 2 Switch 30-75SEC 240V
- 1 DPST and 1 SPST 3 Switch 1-24SEC
- 1 DPST and 1 SPST 3 Switch 1-30SEC
- 1 SPST 1 Switch 1-24SEC 240V
- 2 DPST 2 Switch 1-30SEC
- 2 DPST 4 Switch 1-24SEC
- 2 SPST 2 Switch 1-24SEC
- 3PDT
- 4 Second Delay
- Auxiliary Time Delay
- Coil
- Control High Limit SPST
- Current 040-0088-04
- Current 040-0090-00
- Current 040-0090-01
- Current 040-0090-04
- Current 040-0150-36
- Current 040-0163-04
- Current 040-0172-05
- Current 040-C411-45
- Current 040-C411-63
- Current 040-C411-66
- Current 040-C411-71
- Current 040-C411-73
- Current 040-C411-82
- Current 040-C411-83
- Current 040-C411-89
- Cutoff Replacement
- DPDT
- DPDT Switching
- DPST
- Defrost 040-0181-00
- Delay on Break 5 Minutes
- Delay on Break Adjustable
- Delay on Make Adjustable
- Fan 1PNO/1PNC
- Fan Delay
- Fan for MB/MBE Series
- General Purpose Single Pole Double Throw
- General Purpose Single Pole Single Throw
- Heat Sequencer
- Heat Sequencer 3PDT
- Heat Sequencer Time Delay
- Heavy Duty Normally Open/Normally Closed
- Lock Out SPDT
- Motor Starter Universal
- Motor Starting 1/3HP
- Overload with Mount
- Plug-In DPST Holding Coil
- Plug-In for Blower/Gas Fired Boiler
- Potential
- Potential 040-0001-08
- Potential 040-0001-09
- Potential 040-0001-45
- Potential 040-0166-10
- Potential 040-0166-11
- Potential 040-0166-14
- Potential 040-0166-20
- Potential 040-0166-21
- Potential 040-0166-22
- Potential 040-0166-23
- Potential 040-0166-24
- Potential 040-0166-25
- Potential 040-0166-28
- Potential 040-0166-30
- Potential 040-0166-37
- Potential 040-0166-38
- Potential 163
- Potential 164
- Potential 165
- Potential 166
- Potential 167
- Potential 168
- Potential 169
- Relay Positive Temperature Coefficient
- SPDT
- SPST
- SPST with Pilot Duty Contacts
- Single Pole Double Throw Heavy Duty
- Start 60 Hertz
- Tekmarnet System 4 Programmable
- Term-Lok Stake On 3 Wire
- Time Delay
- Time Delay Adjustable 0.3-10 Minute
- Time Delay Motor
- Time Delay On Break 10 Minute Knob Adjustable
- Time Delay On Break 3-10 Minute Adjustable
- Time Delay On Make 1-1023 Second Switch Selectable
- Time Delay On Make 10-1000 Second Knob Adjustable
- Time Delay for Alpine Gas Fired Hot Water Boiler
Voltage
- 110-270VAC
- 110/120V
- 114V
- 120V
- 132 to 148/332/40 to 90V
- 140 to 152/253/35 to 77V
- 140 to 153/30 to 65V
- 162 to 175/332/40 to 90V
- 168V
- 170V
- 171 to 184/55 to 90V
- 18/240VAC
- 18/30VAC
- 180 to 193/332/40 to 90V
- 180 to 193/383/55 to 115V
- 180 to 195/375/40 to 105V
- 180 to 195/40 to 105V
- 208 to 239/60 to 130V
- 208/240V
- 221V
- 223 to 252/420/60 to 121V
- 239 to 290/375/60 to 110V
- 240V
- 245 to 275/60 to 140V
- 248 to 268/332/88V
- 24V
- 253V
- 290V
- 300 to 328/75 to 121V
- 323 to 352/75 to 135V
- 332/336V
- 332V
- 336V
- 338V
- 375V
- 395V
- 420V
- 500V
- 502V
- 600V
Relays are electrically-operated switches that regulate power to downstream circuits when energized to control low-current equipment, devices, machinery, and electrical systems.
- General purpose and power relays use input signals and low voltages to control larger circuits.
- Time-delay relays open and close their contacts at preset times.
- Monitoring relays detect changes in operational or environmental conditions and protect downstream equipment from damage.
- Safety relays monitor operational and environmental conditions and disrupt power to protect workers.
- Solid-state relays have no moving parts and provide long service lives.
- Alternating relays toggle between loads to sequence load matching and distribute equal run times.
- Automotive relays regulate the flow of power through circuits to control vehicle components.
- Relay sockets mount on surfaces to interface relays with electrical connections.
Committed to customer satisfaction
as experts in Relays
Recently Viewed
Popular Products
View all →
ZPS-ACC04-1 | Room Pressure Pickup Ports with Temperature Sensor | BAPI
Brand: BAPI
SKU: ZPS-ACC04-1
B214 | Characterized Control Valve (CCV), 1/2", 2-way | Belimo
Brand: Belimo
SKU: B214
EPRC1501-NL | 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Everflow
Brand: Everflow
SKU: EPRC1501-NL
NGR02-BBA | Gas Regulator | 3/4" | 1/4" Orifice | GREEN 6.5-16" WC | Norgas Controls
Brand: Norgas Controls
SKU: NGR02-BBA
BA/10K-2-H210-D-BBX | Duct Humidity (%RH) Sensor with Optional Temperature Sensor | BAPI
Brand: BAPI
SKU: BA/10K-2-H210-D-BBX
N5D-1500-S | GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Norgas Controls
Brand: Norgas Controls
SKU: N5D-1500-S
ZPS-ACC04-1 | Room Pressure Pickup Ports with Temperature Sensor | BAPI
Brand: BAPI
SKU: ZPS-ACC04-1
B214 | Characterized Control Valve (CCV), 1/2", 2-way | Belimo
Brand: Belimo
SKU: B214
EPRC1501-NL | 1-1/2" X 1" F1807 PEX Reducing Coupling Lead Free | Everflow
Brand: Everflow
SKU: EPRC1501-NL
NGR02-BBA | Gas Regulator | 3/4" | 1/4" Orifice | GREEN 6.5-16" WC | Norgas Controls
Brand: Norgas Controls
SKU: NGR02-BBA
BA/10K-2-H210-D-BBX | Duct Humidity (%RH) Sensor with Optional Temperature Sensor | BAPI
Brand: BAPI
SKU: BA/10K-2-H210-D-BBX
N5D-1500-S | GAS REGULATOR 1-1/2" NPT 7-11"WC CSA | Norgas Controls
Brand: Norgas Controls
SKU: N5D-1500-Sprev
next