Hanbell PTC110 Discharge Temperature Sensor
The PTC110 is a positive temperature coefficient (PTC) protection thermistor fitted at the discharge port of Hanbell screw compressors. Its function differs fundamentally from an ordinary temperature sensor: it is not a measurement device sending a reading to a controller, it is a protection device. Its resistance stays low during normal operation and rises sharply once discharge temperature exceeds the permitted limit, at which point the protection module trips the compressor immediately.
Because it’s a protection device rather than a measurement one, understanding how it’s wired is the key to diagnosing it, and that specific point is why maintenance teams lose days on this fault.
Cool.sa supplies this part within our range of chiller spare parts, stocked inside Saudi Arabia, with a VAT invoice and delivery to project sites across the Kingdom.
Key Features
- PTC thermistor with positive temperature coefficient, a protection device, not a measuring instrument
- Mounts at the compressor discharge port or on the discharge line adjacent to it
- Works with the INT69HBY protection module fitted in the compressor terminal box
- Wired in series with the PTC sensors embedded in the motor windings
- Nominal response temperature 90 °C for R717 ammonia applications
- Designed for Hanbell screw compressors in the RC2, RC2-AVI and RG series
Benefits of Using This Product
Discharge temperature protection isn’t an optional extra on a screw compressor, it’s the last line of defence before catastrophic damage. Elevated discharge temperature means oil breakdown and loss of lubricating properties, which leads to bearing and rotor wear and internal damage repairable only by full overhaul or compressor replacement.
The specific value of this part is that it’s extremely cheap relative to what it protects. Replacing a failed PTC restores the entire protection chain and returns the compressor to service the same day, instead of running a compressor with no discharge protection, which should never be done under any circumstances.
Technical Specifications
| Specification | Value |
| Part number | PTC110 |
| Full reference formats | PTC110 02D512S46 / PTC110 02D512S37 |
| Type | PTC thermistor (positive temperature coefficient) |
| Function | Discharge temperature protection, trip device, not measurement |
| Mounting position | Compressor discharge port |
| Protection module | INT69HBY |
| Wiring | In series with motor winding PTC sensors |
| Response temperature (R717) | 90 °C |
| Compatible compressors | Hanbell RC2, RC2-AVI, RG |
| Manufacturer | Hanbell |
Why Buy Your Hanbell PTC110 From Cool.sa
- A genuine part with a correctly calibrated response temperature. We don’t sell the low-cost copies circulating on global platforms. On a protection component, the difference isn’t quality, it’s whether it protects at all.
- We identify the correct suffix before you order: 02D512S46 or 02D512S37. Send a photo and we’ll confirm.
- We work from the compressor nameplate, not the chiller. We know Hanbell compressors sit inside chillers of many brands, and we deal with the compressor rather than the name on the casing.
- Stock inside Saudi Arabia rather than waiting on an overseas shipment for a part that has a whole unit down.
- Companion protection parts: INT69HBY modules and other protection components from the same stock.
- VAT invoicing for corporate, government and private-sector procurement.
- Delivery to project sites: Riyadh, Jeddah, Dammam, Khobar, Jubail, Yanbu, Ras Al Khair.
- Support in Arabic and English from a team that knows Hanbell compressors and their protection systems.
- GCC export quoting for the UAE, Qatar, Kuwait, Bahrain and Oman.
Frequently Asked Questions
Q1. Is this a measurement sensor or a protection device?
It is a protection device. A PTC thermistor does not send a temperature reading to the controller. Instead, its resistance rises sharply when the temperature exceeds its specified limit, causing the protection module to trip the compressor.
Q2. My compressor won’t start and the INT69 shows an alarm. Is this the cause?
Very possibly. The sensor is wired in series with the motor winding sensors, so an open circuit in the protection chain can prevent the compressor from starting. Measure the chain resistance first. Infinite resistance indicates an open circuit.
Q3. What’s the difference between 02D512S46 and 02D512S37?
They are two different suffixes within the same part family. Check the label on the existing sensor to identify the fitted version, and send us a photo for confirmation before ordering.
Q4. What’s the difference between PTC110 and PT1000?
PTC110 is a protection device installed at the discharge port, while PT1000 is a measurement sensor embedded in the motor windings that provides a numerical temperature reading. See the comparison table above for more details.
Q5. My chiller isn’t a Hanbell brand. Is this part still relevant?
It may be. Hanbell manufactures compressors that are installed in chillers from many different brands. For compatibility, the compressor nameplate and exact compressor model are more important than the chiller brand.
English 
العربية