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 370V/450V CBB65 Round Run Start Capacitor for AC Motor Run or Fan Start and Cool or Heat Pump Air Conditioner

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

Product ID: 714336827

Details

Brand
BOJACK
Capacitance
50 Microfarad
Material
Polypropylene
Operating voltage
450 Volts
Shape
Round

⚡50µF high capacitance

🔥Heat-resistant up to 70°C

🛡️10,000AFC explosion-proof safety

€ 90.42

Duties & taxes included

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Description

⚡ Boost your motor’s mojo with BOJACK’s powerhouse capacitor!

EXPLOSION PROOF SAFETY - Certified 10,000AFC rating for industrial-grade protection and peace of mind.
BUILT TO BRAVE THE HEAT - Operates flawlessly from -40℃ to +70℃, ensuring durability in extreme conditions.
DUAL VOLTAGE VERSATILITY - Rated for 370V/450V AC, perfect for central air conditioners, heat pumps, and compressors.
POWER PACKED 50 F CAPACITY - Delivers reliable motor start and run performance for AC and fan motors.
UNIVERSAL FIT LIGHTWEIGHT - Compact round design fits oval capacitors with ease, making upgrades seamless.

The BOJACK 50µF ±5% CBB65 Round Run Start Capacitor is an industrial-grade, heat-resistant, and explosion-proof component designed to optimize the start and run performance of AC motors, fans, and compressors. Rated for 370V/450V AC and operating reliably between -40℃ and +70℃, it offers a universal, compact fit that upgrades HVAC systems with enhanced safety and efficiency.

Specifications

ASIN	B07VMH1213
Brand Name	BOJACK
Capacitance	50 Microfarad
Customer Reviews	4.6 4.6 out of 5 stars (554)
Item Shape	Round
Manufacturer	BOJACK
Material Type	Polypropylene Aluminum Polypropylene
Model	BJ-CAP
Operating Voltage	450 Volts
Part Number	BJ-CAP
UPC	768894139441
Upper Temperature Rating	70 Degrees Celsius

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