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Thermal Units

SQUARE D Thermal Unit, B28.0

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Thermal Unit, Model B28.0, For Use With Square D Motor Starters, NEC Article 430 Part C, NEMA Size 00, 0, 1, 1P, 2, 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 #	1H619
Price (ea.)	$26.90
Brand	SQUARE D
Mfr. Model #	B28.0
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
FL Amp @ 3-Ph/ Size 00,0,1/ Standard Enclosure		15.9
FL Amp @ 3-Ph/ Size 2/ Standard Enclosure		17.1
FL Amp @ 1-Ph/ Size 00,0,1/ Open & Large Enclosure		19.4
FL Amp @ 1-Ph/ Size 1P/ Open & Large Enclosure		21.6
FL Amp @ 1-Ph/ Size 00,0,1/ Standard Enclosure		18.9
FL Amp @ 1-Ph/ Size 1P/ Standard Enclosure		21.6
FL Amp @ 1-Ph/ Size 2/ Standard Enclosure		21.0
FL Amp @ 3-Ph/ Size 00,0,1/ Open & Large Enclosure		17.2
FL Amp @ 3-Ph/ Size 2/ Open & Large Enclosure		18.2
FL Amp @ 1-Ph/ DP 20-30A/ Standard Enclosure		20.0
FL Amp @ 1-Ph/ DP 40A/ Standard Enclosure		20.5
FL Amp @ 1-Ph/ DP 50A/ Standard Enclosure		20.8
FL Amp @ 3-Ph/ DP 20-30A/ Standard Enclosure		17.9
FL Amp @ 3-Ph/ DP 40A/ Standard Enclosure		18.9
FL Amp @ 3-Ph/ DP 50A/ Standard Enclosure		18.5
FL Amp @ 3-Ph/ DP 20-30A/ Open & Large Enclosure		18.9
FL Amp @ 3-Ph/ DP 40A/ Open & Large Enclosure		19.9
FL Amp @ 3-Ph/ DP 50A/ Open & Large Enclosure		19.6
FL Amp @ 1-Ph/ Man. Size 1/ Open & Large Enclosure		22.0
FL Amp @ 1-Ph/ Man. Size 1/ Standard Enclosure		20.6
FL Amp @ 1-Ph/ Man. Size 1P/ Open & Large Enclosure		22.0
FL Amp @ 1-Ph/ Man. Size 1P/ Standard Enclosure		20.6
FL Amp @ 3-Ph/ Man. Size 1/ Open & Large Enclosure		17.8
FL Amp @ 3-Ph/ Man. Size 1/ Standard Enclosure		17.3

Other Popular Terms for this Product

• Motor Overload Protection (4463)

• Motor Starter Heaters (377)

• Motor Starter Thermal Units (377)

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SQUARE D Thermal Unit, B28.0

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