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Johnson Controls A19 Series Remote Bulb Control

Remote Bulb Control
A19 Series

The A19 Series are single-stage temperature controls that incorporate environmentally friendly liquid-filled sensing elements.

• wide temperature ranges available
• constant differential throughout the entire range
• compact enclosure
• fixed or adjustable differential available
• variety of sensing element styles
• unaffected by cross-ambient conditions

Select a link under the "item" tab below to order.

Cat #TypeSwitch ActionRange °F (°C)Diff F°(C°)Bulb and CapillaryBulb Well No. (order separately)Range AdjusterMax. Bulb Temp. °F (°C)
A19ABA-40C ²Adjustable Differential (Wide Range)SPST Open Low-30 to 100 (-34 to 38)3 to 12 (1.7 to 6.7)3/8 in. x 4 in., 6 ft. Cap.WEL14A-602RScrewdriver Slot140 (60)
A19ABC-4CAdjustable Differential (Wide Range)SPDT50 to 130 (10 to 55)3 1/2 to 14 (1.9 to 8)3/8 in. x 5 in., 8 ft. Cap.WEL14A-603RKnob170 (77)
A19ABC-24C ³Adjustable Differential (Wide Range)SPDT-30 to 100 (-34 to 38)3 to 12 (1.7 to 6.7)3/8 in. x 4 in., 8 ft. Cap.WEL14A-602RConvertible140 (60)
A19ABC-36CAdjustable Differential (Wide Range)SPDT-30 to 100 (-34 to 38)3 to 12 (1.7 to 6.7)3/8 in. x 4 in., 20 ft. Cap.WEL14A-602RConvertible140 (60)
A19ABC-37CAdjustable Differential (Wide Range)SPDT-30 to 100 (-34 to 38)3 to 12 (1.7 to 6.7)3/8 in. x 4 in., 10 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19ABC-74CAdjustable Differential (Wide Range)SPDT-30 to 100 (-34 to 38)3 to 12 (1.7 to 6.7)3/8 in. x 4 in., 6 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19AAF-12CFixed DifferentialSPDT25 to 225 (-4 to 107)3 1/2 (1.9)3/8 in. x 3 in., 10 ft. Cap.WEL14A-602RScrewdriver slot275 (135)
A19AAC-4CFixed Differential (Case Compensated)SPDT0 to 80 (-18 to 27)5 (2.8)3/8 in. x 4 in., 6 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19AAD-12CFixed Differential (Case Compensated)SPST Open Low-30 to 50 (-34 to 10)2 1/2 (1.4)3/8 in. x 4 in., 7 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19AAD-5C ⁴Fixed Differential (Close)SPST Open Low-30 to 50 (-34 to 10) (Bulk Milk Cooler)2 1/2 (1.4)3/8 in. x 2 5/8 in., 6 ft. Cap.WEL16A-601RScrewdriver slot190 (88)
A19AAF-20CFixed Differential (Close)SPDT-30 to 100 (-34 to 38)2 1/2 (1.4)3/8 in. x 4 in., 6 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19AAF-21CFixed Differential (Close)SPDT40 to 90 (4 to 32)1 1/2 (0.8)3/8 in. x 5 3/4 in., 6 ft. Cap.WEL14A-603RScrewdriver slot140 (60)
A19ACA-14CManual ResetSPST Open Low-30 to 100 (-34 to 38)Manual Reset3/8 in. x 4 in. 6 ft .Cap.WEL14A-602RScrewdriver slot140 (60)
A19ACA-15CManual ResetSPST Open Low-30 to 100 (-34 to 38)Manual Reset3/8 in. x 4 in. 10 ft. Cap.WEL14A-602RScrewdriver slot140 (60)
A19ADB-1CManual ResetSPST Open High100 to 240 (38 to 116)Manual Reset3/8 in. x 3 1/2 in. 6 ft. Cap.WEL14A-602RKnob290 (143)
A19ADN-1CManual ResetSPST Open High100 to 240 (38 to 116)Manual Reset3/8 in. x 4 in. 6 ft. Cap.WEL14A-602RScrewdriver slot290 (143)
Motor Ratings VAC 120 208 240
Wide Range – Adjustable Differential
AC Full Load A 16.0 9.2 8.0
AC Locked Rotor A 96.0 55.2 48.0
Non-Inductive A 1 22 A, 120 to 277 VAC
Pilot Duty – 125 VA, 24 to 600 VAC
Fixed Differential and Close Differential
AC Full Load A 6.0 3.4 3.0
AC Locked Rotor A 36.0 20.4 18.0
Non-Inductive A 10 A, 24 to 277 VAC
Pilot Duty – 125 VA, 24 to 277 VAC
Case Compensated – Fixed Differential
A19AAC-4
AC Full Load A 16.0 9.2 8.0
AC Locked Rotor A 96.0 55.2 48.0
Non-Inductive A 1 22 A, 120 to 277 VAC
Pilot Duty – 125 VA, 24 to 600 VAC
A19AAD-12
AC Full Load A 6.0 3.4 3.0
AC Locked Rotor A 36.0 20.4 18.0
Non-Inductive A 10 A, 24 to 277 VAC
Pilot Duty – 125 VA, 24 to 277 VAC
Manual Reset
AC Full Load A 6.0 3.4 3.0
AC Locked Rotor A 36.0 20.4 18.0
Non-Inductive A 16.0 9.2 8.0
Pilot Duty – 125 VA, 24 to 600 VAC


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