This capacitor replaces the capacitor that i have defective arcotronics 50uf (c.87.0ef3 mkp) ?

I can't find the specs for your arcotronics capacitor. Please look on your capacitor to see if you can find the voltage. If is 370 or 450 volts (370/450V) then this capacitor should work for your application. If the voltage is something else or missing then i'm afraid I can't answer your question. Good luck!

Will this replace a cbb65 (rohs) 55uf =- 5% 450vac c 40/70/21 50/60 hz from a kenmore 253.70251 window unit?

I’m not an expert… I got this for a RV AC unit, but all the specs match so, yes.

currently have a 45 uf +/- 6% 440 vac mars brand can i use this one as replacement even though its a 50uf rating ??

No I would not do that ,try to stick to the original value. A lower value could make the motor run not optimal.

replacing 50uf +5 370vac 50/60hz 40/85/21 - is this unit compatible?

Because the capacitance is 50uf, not 50+5uf, this unit is not compatible. Thanks!

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BOJACK 50 uF ±5% 50 MFD 370/450 V CBB65 Round Run Start Capacitor for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditione

BOJACK 50 uF ±5% 50 MFD 370/450 V CBB65 Round Run Start Capacitor for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditione

Product ID: 155002959

Details

Brand
BOJACK
Capacitance
50 microfarad
Material
Aluminum
Operating Voltage
450 volts
Shape
Round

⚡50 µF capacitance for powerful motor starts

🔥Wide -40°C to +70°C operating temperature range

🛡️10,000 AFC anti-explosion safety rating

4638 kr

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Description

⚡ Power your AC and fans with BOJACK — the capacitor that never quits!

BUILT TO BRAVE EXTREMES - Operates flawlessly from freezing -40°C to scorching +70°C environments
UNIVERSAL COMPATIBILITY - Dual 370/450 V rating fits a wide range of AC motors, fans, and heat pumps
COMPACT DURABLE DESIGN - Lightweight aluminum case with metallized polypropylene film for long-lasting resilience
SAFETY FIRST ENGINEERING - 10,000 AFC anti-explosion rating guarantees peace of mind under pressure
RELIABLE HIGH CAPACITY PERFORMANCE - 50 µF ±5% ensures consistent, efficient motor startup every time

The BOJACK 50 µF ±5% CBB65 Round Run Start Capacitor is an industrial-grade, dual-voltage (370/450 V) component designed for reliable startup and operation of AC motors, fans, compressors, and heat pumps. Engineered with a robust aluminum case and metallized polypropylene dielectric, it withstands extreme temperatures (-40°C to +70°C) and features a 10,000 AFC anti-explosion safety rating. Its compact, lightweight design and universal compatibility make it a trusted replacement part that boosts efficiency and durability in HVAC and industrial applications.

Specifications

ASIN	B07VMH1213
Best Sellers Rank	#6,557 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #39 in Industrial Electrical Capacitors
Brand Name	BOJACK
Capacitance	50 microfarad
Capacitance Tolerance	5
Customer Reviews	4.5 4.5 out of 5 stars (554)
Item Dimensions W x H	2.27"W x 3.95"H
Item Shape	Round
Manufacturer	BOJACK
Material Type	Aluminum, Polypropylene
Maximum Voltage	450 volts
Model	BJ-CAP
Mounting Type	Through-Hole Mount
Operating Voltage	450 volts
Part Number	BJ-CAP
UPC	768894139441
Upper Temperature Rating	70 °C

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