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TECHNICAL FEATURES
Housing dimensions: 79 x 53 x 36 mm (without terminals)
Bulb and capillary: copper for temperature ranges up to 50°C (122°F), stainless steel over, capillary length 1500 mm or 3000 mm. Capillary minimum bending radius 5mm.
Temperature sensing element: liquid filled bulb and capillary.
Terminals: 6.35 x 0.8 quick connect terminals (M4 screws also available on request),
Adjustment: Dia. 6 mm shaft with 4.6 mm flat, (other lengths or fixed setting available on request).
Mounting: Front bracket with 2 xM4 threads, 28 mm distance
Rating: 15A (1/4 HP) 250VAC, 15A 400V res. KU type cannot be used on 400V
Contacts: SPDT (snap action contact)
Electrical life: >500,000 cycles at nominal rating
| References with standard differential |
References with reduced differential |
Temperature range (°C/°F) | Capillary length (mm) | Bulb diameter
(mm) |
Bulb length
(mm) |
KR: Standard Differential
(°C/°F) |
KU: Reduced
Differential (°C/°F) |
Max temperature on bulb (°C/°F) |
| KRA-250252200 | KUA-250252200 | -25+25°C (-15+80°F) | 1500 | 6.4 | 152 | 3±2°C (5.5±3.6 °F) | 2±1°C (3.6±1.8 °F) | 50°C (120°F) |
| KRA-100152200 | KUA-100152200 | -10+15°C (15-60°F) | 1500 | 6.4 | 152 | 3±2°C (5.5±3.6 °F) | 2±1°C (3.6±1.8 °F) | 50°C (120°F) |
| KRA0000502000 | KUA0000502000 | 0-50°C (32-120°F) | 1500 | 6.4 | 152 | 3±2°C (5.5±3.6 °F) | 2±1°C (3.6±1.8 °F) | 60°C (140°F) |
| KRA0000705200 | KUA0000705200 | 0-70°C (32-160°F) | 1500 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0000701200 | KUA0000701200 | 0-70°C (32-160°F) | 3000 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0200905000 | KUA0200905000 | 20-90°C (70-195°F) | 1500 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0200901000 | KUA0200901000 | 20-90°C (70-195°F) | 3000 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0101505000 | KUA0101505000 | 10-150°C (50-300°F) | 1500 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0101501000 | KUA0101501000 | 10-150°C (50-300°F) | 3000 | 4.8 | 130 | 5±3°C (9±5.4°F) | 3±2°C (5.5±3.6 °F) | 160°C (320°F) |
| KRA0802000100 | KUA0802000100 | 80-200°C (175-390°F) | 1500 | 4 | 100 | 10±4°C (18±7°F) | 7±3°C (12.5±5.4 °F) | 320°C (610°F) |
| KRA0503000100 | KUA0503000100 | 50-300°C (120-570°F) | 1500 | 4 | 100 | 10±4°C (18±7°F) | 7±3°C (12.5±5.4 °F) | 320°C (610°F) |
| KRA0104507000 | KUA0104507000 | 10-450°C (50-840°F) | 1500 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA0104509000 | KUA0104509000 | 10-450°C (50-840°F) | 3000 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA0605007000 | KUA0605007000 | 60-500°C (140-930°F) | 1500 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA0605009000 | KUA0605009000 | 60-500°C (140-930°F) | 3000 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA1806007000 | KUA1806007000 | 180-600°C (360-1110°F) | 1500 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA1806009000 | KUA1806009000 | 180-600°C (360-1110°F) | 3000 | 4.8 | 120 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
| KRA2807007000 | KUA2807007000 | 280-700°C (540-1290°F) | 1500 | 3 | 300 | 20±6°C (36±11°F) | 12±4°C (22±7 °F) | 760°C (1400°F) |
These thermostats are also available with screw driver adjustment, 20 or 30 mm shaft length
Caution: Bulbs and capillaries of ranges higher than 300°C are filled with sodium potassium eutectic. If they leak or are broken this liquid is flammable if in contact with water
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