28 items Patent
Large setting range
Small size
Simple to mount
High switching performance
With Fast Fixing Part
NT 51-F: Thermostat (normally closed); contact breaker for regulating heaters. The contact opens when temperature is rising.
NT 52-F: Thermostat (normally open); contact maker for regulating of filter fans and heat exchangers or for switching signal devises when temperature limit has been exceeded. The contact closes when temperature is rising.
Technical Data
NT 51-F / NT 52-F | |
Operating Voltage | All AC/DC Voltage |
Switch temperature difference | +/-5°C |
Sensor element | thermostatic bimetal |
Contact type | snap-action contact |
Service life | >100,000 cycles |
Max. switching capacity | 250VAC, 10 (2) A / 120VAC, 15 (2) A DC 30W at 24VDC to 72VDC |
Max. inrush curren | AC 16A for 10 sec |
Connection | 2-pole terminal, clamping torque 0.5Nm max.: rigid wire 2.5mm² (AWG 14) stranded wire¹ 1.5mm² (AWG 16) |
Mounting | clip for 35mm DIN rail, EN 60715 |
Casing | plastic according to UL94 V-0, light grey |
Dimensions | 83×48×17mm |
Weight | approx. 40g |
Fitting position | variable |
Operating/Storage temperature | -45 to +80°C (-49 to +176°F) |
Operating/Storage humidity | max. 90% RH (non-condensing) |
Protection type | IP20 |
¹ When connecting with wires, wire end ferrules must be used.
Important note: The contact system of the regulator is subjected to environmental influences, thus the contact resistance may change. This can lead to a voltage drop and/or self-heating of the contacts.
Art. No. Contact breaker (NC) | Art. No. Contact maker (NO) | Setting range |
51NCF01 | 52NOF01 | -10 to +80°C |
51NCF02 | 52NOF02 | +14 to +176°F |
51NCF03 | 52NOF03 | 0 to +60°C |
51NCF04 | 52NOF04 | +32 to +140°F |
