Voltage Regulator 44-9143 Fit Thermo King SB-400 SB-210 30 SB-II SB-III 50 MAX

Voltage Regulator for Thermo King

This voltage regulator, cross-referenced as 44-9143, manages electrical output for Thermo King refrigeration units, ensuring stable voltage delivery to the charging system. This voltage regulator is a direct replacement for Thermo King SB-400, SB-210, 30, SB-II, SB-III, and 50 MAX units. The voltage regulator 44-9143 is engineered to maintain consistent performance in demanding transport refrigeration applications.

Overview

This voltage regulator 44-9143 is an electrical component that controls the output of the alternator in Thermo King units, preventing overcharging and protecting the battery and electrical system. This voltage regulator is designed for Thermo King SB-400, SB-210, 30, SB-II, SB-III, and 50 MAX series. It provides reliable regulation for consistent power delivery in fleet and over-the-road refrigeration use.

Built For Performance

• Solid-state regulation for precise voltage control
• Direct replacement for OEM part number 44-9143
• Sealed housing resists moisture and vibration
• Designed to handle continuous duty cycles in transport refrigeration
• Corrosion-resistant terminals for reliable electrical connection

Fits These Machines

• for Thermo King SB-400
• for Thermo King SB-210
• for Thermo King 30
• for Thermo King SB-II
• for Thermo King SB-III
• for Thermo King 50 MAX

On-The-Job Use

• Replaces failed voltage regulators in Thermo King reefer units
• Maintains battery charge during long-haul operations
• Prevents electrical surges that damage sensitive components
• Keeps refrigeration running reliably in hot ambient conditions

Specs At A Glance

Good To Know

Q: Will this voltage regulator work on any Thermo King unit? A: This voltage regulator is specifically match to the SB series and 30/50 MAX models listed. Confirm your unit's model and serial number before ordering to ensure a proper fit.

Q: How do I know if my voltage regulator is faulty? A: Symptoms include battery overcharging, erratic voltage readings, or dimming lights. Testing output voltage with a multimeter can confirm if the regulator is not holding a set level.

Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.