Single-Temperature Refrigeration Units

A complete line of single-temperature units for long haul and delivery applications

Single Temperature Trailer Units

Precedent® S-600

The Precedent S-600 reefer delivers double-digit fuel savings and Thermo King reliability and performance. Plus, its evergreen CARB compliant engine makes it a 50-state solution. 

Precedent® S-700

For single-temperature trailers requiring deep-frozen capability, choose the Precedent S-700 reefer. The S-700 is CARB Evergreen certified and customizable for your business.

Precedent® C-600

Enjoy the benefits of Precedent in a cost-effective package with the C-600 single-temp reefer. Plus, the C-600 is backed by the Thermo King dealer network.

Precedent® S-750i

Our most innovative offering yet. The S-750i has a hybrid-electric architecture with integrated shore power to deliver powerful performance on and off the road. 


Precedent S-Series: The proven evergreen choice

Developed to achieve Evergreen CARB and EPA emissions compliance while adding performance, the Precedent S-Series is notable for what it does not have: a Diesel Particulate Filter (DPF). When considering the negative impact on engine life and fuel efficiency that a DPF brings, it was clear that a DPF was not a viable solution for units that run in California. Choose the S-Series and you’ll avoid the unknowns and risks of DPFs and can rest easy knowing that you’re running a unit that has been proven over the last decade and is compliant nationwide for as long as you own it.

CARB regulations

Precedent Single Temperature Series Product Features

X430P reciprocating compressor

4 cylinder, 30 cubic inch with 4 quart oil sump, forged steel connecting rods with barring inserts and discharge valves incorporating slug relief springs, integrated internal oil filter, 14.5 lbs. of R452A refrigerant.


Smart Reefer® 4 (SR4) control system, temperature data logger, ServiceWatch and Optiset® Plus enabled, running and pretrip diagnostics, integrated USB port, and proprietary eco-pulldown technology.

Integrated telematics

Factory equipped with 24 months complimentary TracKing® Telematics

37 amp extended life alternator

65 amp alternator and 30 amp battery charger optional.

New condenser grilles

The new grilles not only provide improved protection from road debris that can impact the condenser coil, but also a stronger, more integrated look for the unit.

Composite doors

Composite long-life door panels with auto-latch and auto secondary latch on front doors.

Telematics for your fleet

Every Precedent TRU comes connected from the factory with a 24-month free TracKing® telematics subscription, making it easier for fleets to monitor and analyze their refrigerated fleet operations.

  • Real-time connectivity
  • Compliance and security
  • Lower Costs

Save money with ThermoLite® solar panels

ThermoLite® solar panels deliver clean, reliable performance resulting in longer battery life, lower fuel consumption, and reduced emissions. Given these potential benefits, ThermoLite solar panels can be an important part of a comprehensive sustainability program for any business.

Airflow matters

The pallet in the back of the trailer is just as important as the one in the front. Learn more about Thermo King’s superior airflow performance compared to the competition.


The Precedent S-Series engine was developed to meet both CARB and EPA emissions compliance starting in 2013. It also fulfills all of the newly proposed emissions concepts by CARB. R452A refrigerant is standard in Precedent units. R452A provides a lower Global Warming Potential (GWP) and reduces the carbon footprint of refrigerants used by fleets by nearly 50%. Precedent offers returnable packaging pallets to reuse and save wood.