Cubigel ML80TB Hermetic Compressor – 3/8 HP, R404A, HBP 1,105 W

The Cubigel ML80TB (ML 80 TB) is a 3/8 HP hermetic reciprocating compressor manufactured for commercial refrigeration appliances operating at positive temperatures, such as beverage coolers, display cabinets, delicatessen counters and bottle coolers. It runs on R404A; with its 7.57 cm³ displacement it delivers a cooling capacity of 1,105 W (3,770 BTU/h) at the ASHRAE HMBP condition. It is the HMBP model of the ML series, also searched for in the field as a "refrigerator motor".

3/8 HP HMBP Compressor on R404A: For Beverage and Display Coolers

With its L-series housing, the ML80TB operates in the −25 … +10 °C evaporating range with its fan-cooled construction and CSIR (start capacitor) motor; it can be used in capillary tube and expansion valve systems.

Key Technical Features and Equipment

• Brand / Model: Cubigel ML80TB · L series
• Refrigerant: R404A
• Application: HMBP (high-medium back pressure) · evaporating −25 … +10 °C
• Displacement: 7.57 cm³ · bore 25.40 mm · stroke 14.92 mm
• Motor: CSIR · locked rotor current (LRA) 12.8 A · max. continuous current 5.1 A
• Winding resistance (25 °C): main 7.75 Ω · auxiliary 21.43 Ω
• Supply: 220-240 V / 50 Hz single-phase · operating range 198-255 V
• Cooling: fan-cooled · expansion: capillary tube or expansion valve
• Oil: ISO VG 32 ester, 395 cm³
• Tube inside diameters: suction Ø6.5 · service Ø6.5 · discharge Ø4.9 mm
• Dimensions: height 198 mm · base 204 × 162 mm (231 mm with terminal box)
• Mounting holes: 6 × Ø16 (170 × 70 mm) · 4 × Ø19 (165 × 101.6 mm, American-type feet)
• Weight: 9.68 kg · max. ambient temperature 43 °C

Performance (ASHRAE, Condensing +55 °C)

ASHRAE: liquid 46 °C, ambient and suction 35 °C. At the CECOMAF HMBP condition (+5 °C, liquid 55 °C): 875 W, 543 W input power, COP 1.61. Capacity decreases as the evaporating temperature falls; make your selection according to your cabinet target temperature.

Electrical Equipment (Manufacturer References)

• Start capacitor: 47-56 µF 330 V
• Relay: 2014 138 or QLZ-6.1A (pull-in 6.1 A / drop-out 5.2 A)
• Overload protector: MST26AMK or T0181 (11.1 A · open / close 105 / 61 °C)

• 🔧 When replacing: In the CSIR connection the start capacitor is used together with the relay; compare the refrigerant, HMBP class and mounting hole spacing of the old compressor with the dimensional drawing.
• Application limit: This model is HMBP — it is for positive-temperature coolers. It is not used in freezer (LBP) applications.