Skip to product information
SKU:
ZZ3F07351
Same day shipping if ordered by 4PM CST.
12V Regulator Alternator 41-8851 Fit Thermo King RMN-II SR SB Classic SB-100 30
$79.19
In Stock
$79.19
Sale price
$79.19
Regular price
Voltage
Estimated delivery between
Let Northline Parts Do the Heavy Lifting for You!
Not sure which part you need? Our team can help you find the right replacement.
Parts Support Hours: Monday–Friday, 8:00 AM–5:00 PM CT
Live Chat: Available 24/7
I reached out for some replacement head bolts and they responded quickly with a few questions and cautionary information and is sending me some bolts. Great customer service! Thanks
Edward H. — Verified customer
Compatible Models
We do our best to list all compatible models. Although this may be the part you need, your exact model may not appear below.
Compatible equipment / model
12V Regulator Alternator for Thermo King
This 12V regulator alternator, cross-referenced as 41-8851, delivers consistent charging output for Thermo King refrigeration units, ensuring dependable performance in the field. Designed as a direct replacement, it restores proper voltage regulation to keep the electrical system operating reliably. This 12V regulator alternator for Thermo King is built to match the demands of your equipment.
Overview
This 12V regulator alternator, part number 41-8851, is an essential component that converts mechanical energy into electrical power and maintains proper voltage for Thermo King transport refrigeration systems. It serves to recharge the battery and supply power to the unit's electrical loads, ensuring dependable operation. This replacement alternator is designed for Thermo King RMN-II SR, SB Classic, and SB-100 30 models, providing a steady charging output.
Built For Performance
- Delivers 12V output for consistent charging of the refrigeration unit's electrical system.
- Replaces OEM part number 41-8851 for a seamless fit and function.
- Features a built-in voltage regulator to prevent overcharging and protect sensitive components.
- Constructed to endure the demanding conditions of transport refrigeration.
- Direct-fit design simplifies installation and reduces downtime.
Fits These Machines
- for Thermo King RMN-II SR
- for Thermo King SB Classic
- for Thermo King SB-100 30
On-The-Job Use
- Maintains battery charge during long hauls and frequent stop-and-go operation.
- Supports the electrical demands of thermostats, controllers, and other unit electronics.
- Provides reliable power for the unit's blower motors and refrigeration components.
Specs At A Glance
| Voltage | 12V |
| Part Number(s) | 41-8851 |
| Compatible Models | Thermo King RMN-II SR, SB Classic, SB-100 30 |
Good To Know
Q: How do I know this alternator will fit my Thermo King unit? A: This alternator is designed for Thermo King RMN-II SR, SB Classic, and SB-100 30 models, based on the part number 41-8851. Always verify your unit's model and serial number to confirm compatibility before ordering.
Q: Why is my current alternator causing battery problems? A: A failing alternator can lead to an undercharged battery, causing starting issues or erratic unit performance. Replacing it with a properly rated 12V regulator alternator helps restore system voltage and reliability.
Slight variation in finish or dimensions may occur between production runs, and fit can depend on serial number, so confirm compatibility before ordering.