Skip to accessibility statement
Free shipping on orders over $99
●
Your Zip:
43230
ORDER STATUS
Your Zip:
43230
HELP
MENU
CONTACT & SUPPORT
Live Chat Offline:
Email Us
SIGN IN
0
CART
×
SIGN IN
Shop by Category
Plumbing
Heating
HVAC
Electrical
PEX
Fittings
Valves
Tools
Resources
Our Team
Account
Order History
Returns
Customer Support
Give Us Feedback
Tools
Reorder
Quick Order
Saved Carts
Lists
Resources
PEX Plumbing
PEX Tools
Radiant Heat
Boiler Room
Plumbing Supplies
Air Conditioning
Video Library
Project Calculators
Find Parts For Your Unit
Filter menu expanded
Filters
Hide Filters
70 items
Reset
SORT
Top Sellers
Default
Price ▲
Price ▼
Product Availability
–
Show In Stock Only</strong> Filter (62)
Show
In Stock Only
(62)
Product Type
–
HVAC Control Filter (19)
HVAC Control (19)
HVAC Part Filter (46)
HVAC Part (46)
Refrigeration Control Part Filter (4)
Refrigeration Control Part (4)
Relay Filter (1)
Relay (1)
Brand
–
5-2-1 Compressor Saver Filter (3)
5-2-1 Compressor Saver (3)
Bluefin Filter (7)
Bluefin (7)
DiversiTech Filter (2)
DiversiTech (2)
Goodman-Amana Filter (1)
Goodman-Amana (1)
Lennox Filter (2)
Lennox (2)
MARS Filter (4)
MARS (4)
Ranco Filter (5)
Ranco (5)
Rectorseal Filter (3)
Rectorseal (3)
Supco Filter (34)
Supco (34)
TorQstart Filter (9)
TorQstart (9)
Voltage
–
100 to 125 VAC Filter (3)
100 to 125 VAC (3)
115-277V Filter (1)
115-277V (1)
115/288V Filter (2)
115/288V (2)
115V Filter (18)
115V (18)
120v Filter (2)
120v (2)
170v Filter (2)
170v (2)
208-265V Filter (1)
208-265V (1)
208V Filter (3)
208V (3)
220v Filter (1)
220v (1)
230V Filter (3)
230V (3)
See More
Review Score
–
5 Filter (22)
(22)
4 Filter (5)
(5)
Price Range
–
$5 to $10 Filter (4)
$5 to $10 (4)
$10 to $15 Filter (11)
$10 to $15 (11)
$15 to $20 Filter (7)
$15 to $20 (7)
$20 to $25 Filter (9)
$20 to $25 (9)
$25 to $30 Filter (6)
$25 to $30 (6)
$30 to $35 Filter (8)
$30 to $35 (8)
$35 to $40 Filter (3)
$35 to $40 (3)
$40 to $45 Filter (4)
$40 to $45 (4)
$45 to $50 Filter (4)
$45 to $50 (4)
$50 to $60 Filter (4)
$50 to $60 (4)
See More
Home
HVAC Supplies
HVAC Controls
Hard Start Devices
Hard Start Devices
70 items
FILTER
Grid
List
Sort: Top Sellers
SPP6 Compare Checkbox
Compare
Hard Start Kit w/ 500% Torque Increase (90/277V)
SKU:
SPP6
Supco
SKU:
SPP6
Brand:
Supco
(53)
–
+
$10.83
each
ADD TO CART
Add to List
In Stock
Get 734 by
Fri, Jun 26
Total Available: 6,758
In Stock
Get 734 by
Fri, Jun 26
Total Available: 6,758
Add to List
CSRU1 Compare Checkbox
Compare
Hard Start Kit for 1 to 3 Ton A/C Units
SKU:
CSRU1
5-2-1 Compressor Saver
SKU:
CSRU1
Brand:
5-2-1 Compressor Saver
(24)
–
+
$37.39
each
ADD TO CART
Add to List
In Stock
Get 629 by
Fri, Jun 26
Total Available: 2,252
In Stock
Get 629 by
Fri, Jun 26
Total Available: 2,252
Add to List
CSRU2 Compare Checkbox
Compare
Hard Start Kit for 3.5 to 5 Ton A/C Units
SKU:
CSRU2
5-2-1 Compressor Saver
SKU:
CSRU2
Brand:
5-2-1 Compressor Saver
(13)
–
+
$45.75
each
ADD TO CART
Add to List
In Stock
Get 719 by
Fri, Jun 26
Total Available: 1,823
In Stock
Get 719 by
Fri, Jun 26
Total Available: 1,823
Add to List
RCO410 Compare Checkbox
Compare
3-in-1 Hard Start Kit for Refrigerators - 115v (1/3 - 1/4 HP)
SKU:
RCO410
Supco
SKU:
RCO410
Brand:
Supco
(14)
–
+
$12.51
each
ADD TO CART
Add to List
In Stock
Get 208 by
Fri, Jun 26
Total Available: 846
In Stock
Get 208 by
Fri, Jun 26
Total Available: 846
Add to List
RCO210 Compare Checkbox
Compare
Solid-State Hard Start Relay, Overload & Start Capacitor 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
RCO210
Supco
SKU:
RCO210
Brand:
Supco
(6)
–
+
$20.74
each
ADD TO CART
Add to List
In Stock
Get 249 by
Fri, Jun 26
Total Available: 621
In Stock
Get 249 by
Fri, Jun 26
Total Available: 621
Add to List
SPP8E Compare Checkbox
Compare
E Series Hard Start Kit
SKU:
SPP8E
Supco
SKU:
SPP8E
Brand:
Supco
(4)
–
+
$33.75
each
ADD TO CART
Add to List
In Stock
Get 199 by
Fri, Jun 26
Total Available: 1,001
In Stock
Get 199 by
Fri, Jun 26
Total Available: 1,001
Add to List
CSRU3 Compare Checkbox
Compare
Hard Start Kit for 4 to 5 Ton A/C Units
SKU:
CSRU3
5-2-1 Compressor Saver
SKU:
CSRU3
Brand:
5-2-1 Compressor Saver
(12)
–
+
$53.01
each
ADD TO CART
Add to List
In Stock
Get 144 by
Fri, Jun 26
Total Available: 803
In Stock
Get 144 by
Fri, Jun 26
Total Available: 803
Add to List
SPP5 Compare Checkbox
Compare
Hard Start Kit w/ 300% Torque Increase (90/277V)
SKU:
SPP5
Supco
SKU:
SPP5
Brand:
Supco
(4)
–
+
$12.91
each
ADD TO CART
Add to List
In Stock
Get 521 by
Fri, Jun 26
Total Available: 1,178
In Stock
Get 521 by
Fri, Jun 26
Total Available: 1,178
Add to List
96506 Compare Checkbox
Compare
KS1 KickStart Potential Relay and Start Capacitor
SKU:
96506
Rectorseal
SKU:
96506
Brand:
Rectorseal
(13)
–
+
$91.19
each
ADD TO CART
Add to List
In Stock
Get 127 by
Fri, Jun 26
Total Available: 484
In Stock
Get 127 by
Fri, Jun 26
Total Available: 484
Add to List
HSKT1 Compare Checkbox
Compare
Master Series Hard Start Kit w/ 500% Torque Increase (90/277V)
SKU:
HSKT1
Bluefin
SKU:
HSKT1
Brand:
Bluefin
(2)
–
+
$10.13
each
ADD TO CART
Add to List
In Stock
Get 275 by
Fri, Jun 26
Total Available: 1,241
In Stock
Get 275 by
Fri, Jun 26
Total Available: 1,241
Add to List
96503 Compare Checkbox
Compare
TO5 KickStart Potential Relay and Start Capacitor (1 to 3 Ton)
SKU:
96503
Rectorseal
SKU:
96503
Brand:
Rectorseal
(11)
–
+
$77.41
each
ADD TO CART
Add to List
In Stock
Get 200 by
Fri, Jun 26
Total Available: 520
In Stock
Get 200 by
Fri, Jun 26
Total Available: 520
Add to List
HSKT3 Compare Checkbox
Compare
Master Series Hard Start Kit w/ 300% Torque Increase (90/277V)
SKU:
HSKT3
Bluefin
SKU:
HSKT3
Brand:
Bluefin
–
+
$7.44
each
ADD TO CART
Add to List
In Stock
Get 379 by
Fri, Jun 26
Total Available: 921
In Stock
Get 379 by
Fri, Jun 26
Total Available: 921
Add to List
3W1 Compare Checkbox
Compare
3W1 Wire Hard Start Kit
SKU:
3W1
Supco
SKU:
3W1
Brand:
Supco
(53)
–
+
$31.82
each
ADD TO CART
Add to List
In Stock
Get 65 by
Fri, Jun 26
Total Available: 281
In Stock
Get 65 by
Fri, Jun 26
Total Available: 281
Add to List
SPP6E Compare Checkbox
Compare
Series E Super Boost Hard Start Kit, 88-106 MFD, 1/2-3 HP (170/277V)
SKU:
SPP6E
Supco
SKU:
SPP6E
Brand:
Supco
–
+
$31.33
each
ADD TO CART
Add to List
In Stock
Get 80 by
Fri, Jun 26
Total Available: 328
In Stock
Get 80 by
Fri, Jun 26
Total Available: 328
Add to List
SPP7S Compare Checkbox
Compare
Super Seven Wire Hard Start Kit
SKU:
SPP7S
Supco
SKU:
SPP7S
Brand:
Supco
–
+
$27.09
each
ADD TO CART
Add to List
In Stock
Get 86 by
Fri, Jun 26
Total Available: 284
In Stock
Get 86 by
Fri, Jun 26
Total Available: 284
Add to List
URCO210 Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload & Start Capacitor, 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
URCO210
Supco
SKU:
URCO210
Brand:
Supco
–
+
$15.41
each
ADD TO CART
Add to List
In Stock
Get 51 by
Fri, Jun 26
Total Available: 125
In Stock
Get 51 by
Fri, Jun 26
Total Available: 125
Add to List
3W2 Compare Checkbox
Compare
3W2 Wire Hard Start Kit
SKU:
3W2
Supco
SKU:
3W2
Brand:
Supco
(1)
–
+
$39.39
each
ADD TO CART
Add to List
In Stock
Get 88 by
Fri, Jun 26
Total Available: 241
In Stock
Get 88 by
Fri, Jun 26
Total Available: 241
Add to List
TQS6 Compare Checkbox
Compare
1/2 HP thru 10 HP ST Hardstart, 4000 thru 120000 BTU (115-277V)
SKU:
TQS6
TorQstart
SKU:
TQS6
Brand:
TorQstart
(3)
–
+
$16.98
each
ADD TO CART
Add to List
In Stock
Get 283 by
Fri, Jun 26
Total Available: 443
In Stock
Get 283 by
Fri, Jun 26
Total Available: 443
Add to List
HSKT2 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 3 Ton A/C Units
SKU:
HSKT2
Bluefin
SKU:
HSKT2
Brand:
Bluefin
(4)
–
+
$28.35
each
ADD TO CART
Add to List
In Stock
Get 31 by
Fri, Jun 26
Total Available: 409
In Stock
Get 31 by
Fri, Jun 26
Total Available: 409
Add to List
RCO810 Compare Checkbox
Compare
Solid-State Hardstart Relay (110 to 125VAC)
SKU:
RCO810
Supco
SKU:
RCO810
Brand:
Supco
–
+
$24.43
each
ADD TO CART
Add to List
In Stock
Get 23 by
Fri, Jun 26
Total Available: 76
In Stock
Get 23 by
Fri, Jun 26
Total Available: 76
Add to List
URCO410RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/4-1/3 HP, 6.8A RLA (115V)
SKU:
URCO410RC
Supco
SKU:
URCO410RC
Brand:
Supco
(1)
–
+
$20.13
each
ADD TO CART
Add to List
In Stock
Get 6 by
Fri, Jun 26
Total Available: 30
In Stock
Get 6 by
Fri, Jun 26
Total Available: 30
Add to List
12600 Compare Checkbox
Compare
Easy Start 4 Turbo Universal Hardstart
SKU:
12600
MARS
SKU:
12600
Brand:
MARS
–
+
$85.21
each
ADD TO CART
Add to List
In Stock
Get 9 by
Tue, Jun 30
Total Available: 67
In Stock
Get 9 by
Tue, Jun 30
Total Available: 67
Add to List
DST-6 Compare Checkbox
Compare
Hard Start Kit - 500% Torque Multiplier
SKU:
DST-6
DiversiTech
SKU:
DST-6
Brand:
DiversiTech
(2)
–
+
$28.97
each
ADD TO CART
Add to List
In Stock
Get 16 by
Fri, Jun 26
Total Available: 162
In Stock
Get 16 by
Fri, Jun 26
Total Available: 162
Add to List
TQS5 Compare Checkbox
Compare
1/2 HP thru 5 HP ST Hardstart, 4000 thru 60000 BTU (115-277V)
SKU:
TQS5
TorQstart
SKU:
TQS5
Brand:
TorQstart
–
+
$14.93
each
ADD TO CART
Add to List
In Stock
Get 62 by
Fri, Jun 26
Total Available: 204
In Stock
Get 62 by
Fri, Jun 26
Total Available: 204
Add to List
SPP Compare Checkbox
Compare
Pow-R-Pak Solid State Relay for Hard Starting, 1/2-10 HP (90/277V)
SKU:
SPP
Supco
SKU:
SPP
Brand:
Supco
(1)
–
+
$8.12
each
ADD TO CART
Add to List
In Stock
Get 80 by
Fri, Jun 26
Total Available: 81
In Stock
Get 80 by
Fri, Jun 26
Total Available: 81
Add to List
HSKT4 Compare Checkbox
Compare
Master Series Hard Start Kit for 3.5 to 4.5 Ton A/C Units
SKU:
HSKT4
Bluefin
SKU:
HSKT4
Brand:
Bluefin
–
+
$31.79
each
ADD TO CART
Add to List
In Stock
Get 86 by
Fri, Jun 26
Total Available: 179
In Stock
Get 86 by
Fri, Jun 26
Total Available: 179
Add to List
SPP7E Compare Checkbox
Compare
Series E Super Boost Hard Start Kit, 130-156 MFD, 1-4 HP (170/277V)
SKU:
SPP7E
Supco
SKU:
SPP7E
Brand:
Supco
–
+
$34.48
each
ADD TO CART
Add to List
In Stock
Get 10 by
Fri, Jun 26
Total Available: 25
In Stock
Get 10 by
Fri, Jun 26
Total Available: 25
Add to List
3W3 Compare Checkbox
Compare
3W3 Wire Hard Start Kit
SKU:
3W3
Supco
SKU:
3W3
Brand:
Supco
–
+
$51.93
each
ADD TO CART
Add to List
In Stock
Get 10 by
Fri, Jun 26
Total Available: 27
In Stock
Get 10 by
Fri, Jun 26
Total Available: 27
Add to List
DST-5 Compare Checkbox
Compare
Hard Start Kit - 300% Torque Multiplier
SKU:
DST-5
DiversiTech
SKU:
DST-5
Brand:
DiversiTech
(1)
–
+
$18.15
each
ADD TO CART
Add to List
In Stock
Get 36 by
Fri, Jun 26
Total Available: 108
In Stock
Get 36 by
Fri, Jun 26
Total Available: 108
Add to List
URSC10 Compare Checkbox
Compare
Universal Power Hard Start Relay, 1/20-1/2 HP (115V)
SKU:
URSC10
Supco
SKU:
URSC10
Brand:
Supco
(1)
–
+
$16.56
each
ADD TO CART
Add to List
In Stock
Get 21 by
Fri, Jun 26
Total Available: 66
In Stock
Get 21 by
Fri, Jun 26
Total Available: 66
Add to List
URCO210RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/3-1/2 HP, 13.3A RLA (115V)
SKU:
URCO210RC
Supco
SKU:
URCO210RC
Brand:
Supco
(2)
–
+
$22.62
each
ADD TO CART
Add to List
In Stock
Get 9 by
Mon, Jun 29
Total Available: 27
In Stock
Get 9 by
Mon, Jun 29
Total Available: 27
Add to List
HSKT5 Compare Checkbox
Compare
Master Series 3-In-1 Hard Start for Refrigerators - 115v (1/3 - 1/4 HP)
SKU:
HSKT5
Bluefin
SKU:
HSKT5
Brand:
Bluefin
–
+
$11.01
each
ADD TO CART
Add to List
In Stock
Get 181 by
Fri, Jun 26
Total Available: 628
In Stock
Get 181 by
Fri, Jun 26
Total Available: 628
Add to List
SPR1 Compare Checkbox
Compare
Ultra Start Series Hard Start, 270-324 MFD, 3.5-5 HP (330V)
SKU:
SPR1
Supco
SKU:
SPR1
Brand:
Supco
–
+
$50.18
each
ADD TO CART
Add to List
In Stock
Get 2 by
Fri, Jun 26
Total Available: 27
In Stock
Get 2 by
Fri, Jun 26
Total Available: 27
Add to List
TQS2 Compare Checkbox
Compare
3-1/2 HP thru 5 HP EM Hardstart
SKU:
TQS2
TorQstart
SKU:
TQS2
Brand:
TorQstart
–
+
$42.25
each
ADD TO CART
Add to List
In Stock
Get 4 by
Fri, Jun 26
Total Available: 72
In Stock
Get 4 by
Fri, Jun 26
Total Available: 72
Add to List
SPP10E Compare Checkbox
Compare
E Series Hard Start Kit
SKU:
SPP10E
Supco
SKU:
SPP10E
Brand:
Supco
–
+
$58.38
each
ADD TO CART
Add to List
In Stock
Get 5 by
Fri, Jun 26
Total Available: 47
In Stock
Get 5 by
Fri, Jun 26
Total Available: 47
Add to List
RO81 Compare Checkbox
Compare
Snap On Relay/Overload Combo (1/12 - 1/5 HP)
SKU:
RO81
Supco
SKU:
RO81
Brand:
Supco
(2)
–
+
$12.96
each
ADD TO CART
Add to List
In Stock
Get 13 by
Fri, Jun 26
Total Available: 79
In Stock
Get 13 by
Fri, Jun 26
Total Available: 79
Add to List
MPR1 Compare Checkbox
Compare
Hard Start Kit - Mechanical Potential Relay (MPR) & Start Capacitor
SKU:
MPR1
Supco
SKU:
MPR1
Brand:
Supco
–
+
$49.39
each
ADD TO CART
Add to List
In Stock
Get 8 by
Fri, Jun 26
Total Available: 58
In Stock
Get 8 by
Fri, Jun 26
Total Available: 58
Add to List
RO41 Compare Checkbox
Compare
Snap On Relay/Overload Combo (1/4 - 1/3 HP)
SKU:
RO41
Supco
SKU:
RO41
Brand:
Supco
(1)
–
+
$11.78
each
ADD TO CART
Add to List
In Stock
Get 41 by
Fri, Jun 26
In Stock
Get 41 by
Fri, Jun 26
Add to List
URCO810RC Compare Checkbox
Compare
Ultimate Series Hard Start Relay, Overload, Start & Run Capacitor, 1/12-1/5 HP, 4.05A RLA (115V)
SKU:
URCO810RC
Supco
SKU:
URCO810RC
Brand:
Supco
–
+
$18.90
each
ADD TO CART
Add to List
In Stock
Get 1 by
Fri, Jun 26
Total Available: 18
In Stock
Get 1 by
Fri, Jun 26
Total Available: 18
Add to List
HSKT6 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 3 Ton Compressors
SKU:
HSKT6
Bluefin
SKU:
HSKT6
Brand:
Bluefin
–
+
$32.83
each
ADD TO CART
Add to List
In Stock
Get 29 by
Fri, Jun 26
Total Available: 51
In Stock
Get 29 by
Fri, Jun 26
Total Available: 51
Add to List
MPR5 Compare Checkbox
Compare
Ultra Start Series High Torque Hard Start, 189-27 MFD, 1-3 HP (330V)
SKU:
MPR5
Supco
SKU:
MPR5
Brand:
Supco
–
+
$48.70
each
ADD TO CART
Add to List
In Stock
Get 10 by
Fri, Jun 26
Total Available: 35
In Stock
Get 10 by
Fri, Jun 26
Total Available: 35
Add to List
TQS1 Compare Checkbox
Compare
1-1/2 HP thru 3-1/2 HP EM Hardstart
SKU:
TQS1
TorQstart
SKU:
TQS1
Brand:
TorQstart
–
+
$41.38
each
ADD TO CART
Add to List
In Stock
Get 14 by
Fri, Jun 26
Total Available: 122
In Stock
Get 14 by
Fri, Jun 26
Total Available: 122
Add to List
URCO410 Compare Checkbox
Compare
Solid-State Hardstart Relay for High Efficiency Compressors (6.8A)
SKU:
URCO410
Supco
SKU:
URCO410
Brand:
Supco
(1)
–
+
$26.57
each
ADD TO CART
Add to List
In Stock
Get 8 by
Fri, Jun 26
Total Available: 31
In Stock
Get 8 by
Fri, Jun 26
Total Available: 31
Add to List
SPR5 Compare Checkbox
Compare
Ultra Start Series Hard Start, 189-227 MFD, 1-3 HP (330V)
SKU:
SPR5
Supco
SKU:
SPR5
Brand:
Supco
–
+
$44.70
each
ADD TO CART
Add to List
In Stock
Get 2 by
Fri, Jun 26
Total Available: 16
In Stock
Get 2 by
Fri, Jun 26
Total Available: 16
Add to List
RSPP5 Compare Checkbox
Compare
Ranco Rocket Heavy-Duty Hard Start Kit w/ 300% Torque Increase (115/288V)
SKU:
RSPP5
Ranco
SKU:
RSPP5
Brand:
Ranco
–
+
$8.70
each
ADD TO CART
Add to List
In Stock
Get 2 by
Fri, Jun 26
Total Available: 20
In Stock
Get 2 by
Fri, Jun 26
Total Available: 20
Add to List
SPP5E Compare Checkbox
Compare
170-277v 43-52mfd Hard Start
SKU:
SPP5E
Supco
SKU:
SPP5E
Brand:
Supco
–
+
$30.57
each
ADD TO CART
Add to List
In Stock
Get 1 by
Fri, Jun 26
Total Available: 8
In Stock
Get 1 by
Fri, Jun 26
Total Available: 8
Add to List
HSKT7 Compare Checkbox
Compare
Master Series Hard Start Kit for 1 to 5 HP Compressors
SKU:
HSKT7
Bluefin
SKU:
HSKT7
Brand:
Bluefin
–
+
$25.43
each
ADD TO CART
Add to List
In Stock
Get 56 by
Mon, Jun 29
Total Available: 155
In Stock
Get 56 by
Mon, Jun 29
Total Available: 155
Add to List
0130M00441 Compare Checkbox
Compare
Hard Start Relay, 0130M00441
SKU:
0130M00441
Goodman-Amana
SKU:
0130M00441
Brand:
Goodman-Amana
–
+
$28.50
each
ADD TO CART
Add to List
Backorder
Get it by
Fri, Jul 24 - Fri, Aug 21
Backorder
Get it by
Fri, Jul 24 - Fri, Aug 21
Add to List
1
2
Refresh
×
Video