Prestolite Alternator 24V 275A BLP4111M

The Prestolite alternator listed here is a new 24V, 275A unit, part number BLP4111M. It is an OE product from Prestolite and is specified with an internal regulator, insulated return, and clockwise rotation, making the key electrical and mounting details easy to verify before purchase.

This alternator uses a pad mount with 108mm mount centres A, 126mm mount centres B, and a 22mm shaft diameter. The leg thickness is 80mm and the pulley section is not applicable, so the physical mounting arrangement and drive setup should be checked against the existing unit rather than assumed.

It is described as brushless and self-exciting, with lamp terminal, AC (R) terminal, and sense terminal connections. The unit is also noted as being designed for extreme mining applications, which is relevant when the application calls for a heavy-duty 24V charging solution.

For dual alternator applications, the note states that regulator R214107437S is required to be installed. It is also noted as not compatible with diode type battery isolators, so the charging system layout needs to be confirmed carefully before ordering.

Key Features

• Prestolite OE product
• 24V, 275A output
• Brushless design
• Internal regulator
• Self-exciting
• Lamp terminal, AC (R) terminal and sense terminal

Specifications

• Part number: BLP4111M
• Brand: Prestolite
• Product type: Alternator
• Voltage: 24V
• Power rating: 275A
• Mount type: Pad
• Mount centres A: 108mm
• Mount centres B: 126mm

Application and Buying Notes

Confirm the part number BLP4111M first, then compare the mounting pattern, shaft size, and rotation to the alternator you are replacing. The listed 24V, 275A output and pad mount with 108mm and 126mm mount centres are the most useful checkpoints for matching the unit physically and electrically.

The internal regulator and insulated return matter when checking how the vehicle’s charging system is wired. This alternator is also stated to be not compatible with diode type battery isolators, so if the machine uses that style of isolator it needs to be identified before purchase.

If the vehicle is a dual alternator application, the note specifically calls for regulator R214107437S to be installed. That requirement should be checked as part of the full charging system setup, not left until installation day.

The unit is listed as brushless, self-exciting, and fitted with lamp terminal, AC (R) terminal, and sense terminal connections. Those details help when matching the wiring arrangement on heavy-duty equipment, especially where the original alternator has a similar connection layout.

Because this alternator is described for extreme mining applications, it suits buyers looking for a heavy-duty Prestolite 24V charging component with a 275A rating. Even so, the safest approach is to verify the old unit’s part number, mount centres, shaft diameter, and regulator arrangement before placing the order.

Before supply, the safest approach is to confirm the original unit details against the listed part number, voltage, output rating, mounting arrangement, and pulley configuration. That checking process is standard practice in the parts trade because visually similar units can still differ in service-critical ways.

For workshop, fleet, and equipment applications, accurate identification of part number BLP4111M helps avoid unnecessary freight, additional labour, and vehicle or machine downtime. Where the application is not straightforward, the original unit, OEM reference, or workshop records should be used as the primary confirmation point.

Relevant published details for this unit include Type ALTERNATOR, Unit of Measure EACH, Warranty One Year, Mount Centres B 126mm, Power Rating (Amp) 275, Regulator Type Internal, Shaft Diameter 22mm, Voltage 24, Alternator Mount Pad, Insulated Return Yes.

Additional published details for cross-checking include Product Group 2 ALTERNATORS, Part No. BLP4111M, Brand PRESTOLITE, Description Prestolite Alternator 24V 275A, Mount Centres A 108mm, Mount Leg Thickness 80mm, Pulley Section Not Applicable, Rotation CW, Suits Unit Make Prestolite.

Prestolite Alternator 24V 275A. Part number BLP4111M should be checked first. Listed voltage is 24. Listed output rating is 275. These details form the core reference points used by parts interpreters when confirming the correct replacement.

Mount style is Pad. Regulator type is Internal. Pulley configuration is Not Applicable. Those physical and electrical details should line up with the original unit before the replacement is approved for fitment.

For part number BLP4111M, the normal identification sequence is part number, electrical rating, mounting arrangement, connector or terminal style, and pulley or drive details. Using those checkpoints helps confirm that the listed unit matches the service requirement rather than only looking similar.

For a alternator in workshop, fleet, trade, agricultural, or construction service, the listed voltage 24 and output 275 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Where no verified application list is available, the part number, mounting details, connector style, and published specifications should be used as the primary selection criteria.

In the absence of a verified fitment list, the safest approach is to compare the removed unit directly with the listed product details. That includes checking the housing style, pulley layout, regulator arrangement, and any visible identification numbers before supply is approved.

The listed warranty is One Year. Warranty terms should be considered alongside correct application and part identification, as warranty does not replace fitment confirmation.

Compatibility note: Please confirm fitment using part number BLP4111M, the 24V 275A specification, the pad mount with 108mm and 126mm mount centres, and the wiring/regulator details before purchase. If the vehicle uses diode type battery isolators, or if it is a dual alternator application, check the stated requirements carefully.

FAQ

What is the part number for this alternator?

The part number is BLP4111M.

What voltage and output rating does it have?

It is a 24V alternator with a 275A power rating.

Is this a new or remanufactured unit?

This alternator is listed as new.

What mounting details are provided?

It is a pad-mount alternator with mount centres A of 108mm, mount centres B of 126mm, and a mount leg thickness of 80mm.

Does it have an internal regulator?

Yes. The regulator type is internal.

Are there any installation cautions noted?

Yes. For dual alternator applications, regulator R214107437S is required to be installed, and it is not compatible with diode type battery isolators.