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Thermal Units

SQUARE D Thermal Unit, B5.50

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Thermal Unit, Model B5.50, For Use With Square D Motor Starters, NEC Article 430 Part C, NEMA Size 00, 0, 1, 1P, 2, 6, Selection (1) Motor FLA/SF (2) Motor and Starter in SAME Ambient Temp (3) For 1.15 to 1.25SF Thermal Unit Amp Equal Motor FLA/1.0SF Thermal Unit Amp Equal 90% Motor FLA, IF Motor Ambient Temp +18F of Starter-Thermal Unit Amp Equal 10% Derate of (3), IF Motor Ambient Temp -18F of Starter-Thermal Unit Amp Equal 5% Increase of (3), Do NOT Exceed Starter Rating

Grainger Item #	1H629
Price (ea.)	$26.90
Brand	SQUARE D
Mfr. Model #	B5.50
UNSPSC #	39121521
Ship Qty.	1
Sell Qty. (Will-Call)	1
Ship Weight (lbs.)	0.04
Availability	Typically in Stock
Catalog Page No.	317
Country of Origin (Country of Origin is subject to change.)	Mexico

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Item		Thermal Unit
For Use With		Square D NEMA Motor Starters 00, 0, 1, 1P, 2, 6
FL Amp @ 3-Ph/ Size 00,0,1/ Standard Enclosure		3.75
FL Amp @ 3-Ph/ Size 2/ Standard Enclosure		3.76
FL Amp @ 1-Ph/ Size 00,0,1/ Open & Large Enclosure		4.22
FL Amp @ 1-Ph/ Size 1P/ Open & Large Enclosure		4.15
FL Amp @ 1-Ph/ Size 00,0,1/ Standard Enclosure		4.00
FL Amp @ 1-Ph/ Size 1P/ Standard Enclosure		4.15
FL Amp @ 1-Ph/ Size 2/ Standard Enclosure		4.23
FL Amp @ 3-Ph/ Size 00,0,1/ Open & Large Enclosure		3.94
FL Amp @ 3-Ph/ Size 2/ Open & Large Enclosure		3.89
FL Amp @ 1-Ph/ DP 20-30A/ Standard Enclosure		4.32
FL Amp @ 1-Ph/ DP 40A/ Standard Enclosure		4.46
FL Amp @ 1-Ph/ DP 50A/ Standard Enclosure		4.22
FL Amp @ 3-Ph/ DP 20-30A/ Standard Enclosure		3.79
FL Amp @ 3-Ph/ DP 40A/ Standard Enclosure		4.04
FL Amp @ 3-Ph/ DP 50A/ Standard Enclosure		3.89
FL Amp @ 3-Ph/ DP 20-30A/ Open & Large Enclosure		4.11
FL Amp @ 3-Ph/ DP 40A/ Open & Large Enclosure		4.11
FL Amp @ 3-Ph/ DP 50A/ Open & Large Enclosure		4.09
FL Amp @ 1-Ph/ Man. Size 0/ Open & Large Enclosure		4.53
FL Amp @ 1-Ph/ Man. Size 0/ Standard Enclosure		4.24
FL Amp @ 1-Ph/ Man. Size 1/ Open & Large Enclosure		4.53
FL Amp @ 1-Ph/ Man. Size 1/ Standard Enclosure		4.24
FL Amp @ 1-Ph/ Man. Size 1P/ Open & Large Enclosure		4.53
FL Amp @ 1-Ph/ Man. Size 1P/ Standard Enclosure		4.24
FL Amp @ 3-Ph/ Man. Size 0/ Open & Large Enclosure		3.85
FL Amp @ 3-Ph/ Man. Size 0/ Standard Enclosure		3.76
FL Amp @ 3-Ph/ Man. Size 1/ Open & Large Enclosure		3.85
FL Amp @ 3-Ph/ Man. Size 1/ Standard Enclosure		3.76

Other Popular Terms for this Product

• Motor Overload Protection (3732)

• Motor Starter Heaters (377)

• Motor Starter Thermal Units (377)

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Electrical > Starters and Contactors > Thermal Units

SQUARE D Thermal Unit, B5.50

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