Prestolite Alternator 24V 185A BLP4112M

The Prestolite BLP4112M is a new 24V alternator rated at 185A, supplied as an each unit and identified for the Prestolite unit make. It uses an internal regulator, insulated return, and pad mount arrangement, with mount centres of 108mm on one side and 126mm on the other, plus a mount leg thickness of 80mm.

This alternator is a brushless OE product with lamp terminal, AC (R) terminal, self-exciting function, and sense terminal. It has a 22mm shaft diameter, clockwise rotation, and no pulley section applicable, which are important checks when matching to an existing charging system or replacement assembly.

The unit is listed for extreme mining applications and carries the note that it is not compatible with diode type battery isolators. For dual alternator applications, the R214107437S regulator is required to be installed. Those two points are important to confirm before ordering, particularly where the vehicle already has auxiliary charging equipment fitted.

Key Features

• 24V alternator with 185A power rating
• New unit, sold individually
• Internal regulator
• Brushless OE product
• Lamp terminal and AC (R) terminal
• Self-exciting with sense terminal

Specifications

• Part No.: BLP4112M
• Brand: Prestolite
• Product type: Alternator
• Voltage: 24V
• Power rating: 185A
• Mount type: Pad
• Mount centres A: 108mm
• Mount centres B: 126mm

Application and Buying Notes

Before ordering, confirm the part number BLP4112M against the alternator currently fitted, along with the 24V system voltage and 185A output requirement. The mounting dimensions are specific: 108mm mount centres A, 126mm mount centres B, and 80mm mount leg thickness. If those measurements do not align with the vehicle’s existing bracketry, the alternator will not be a direct physical match.

The shaft diameter is 22mm, the rotation is clockwise, and the pulley section is listed as not applicable. Those details matter when comparing against the removed unit, because pulley style, shaft size, and rotation must match the application. The unit also has an internal regulator, so it is best suited to systems designed for that regulator type rather than an external-regulated arrangement.

Pay close attention to the electrical connections as well. This alternator includes a lamp terminal, AC (R) terminal, and sense terminal, and it is self-exciting. It is also noted as not compatible with diode type battery isolators. If the vehicle uses that type of isolator, this alternator should not be assumed suitable without confirming the charging setup first.

For dual alternator applications, the stated requirement is that regulator R214107437S must be installed. That is a specific installation condition and should be checked against the vehicle’s existing charging system before purchase. The alternator is also described as designed for extreme mining applications, so it is intended for demanding use where the correct electrical configuration is essential.

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 BLP4112M 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) 185, 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. BLP4112M, Brand PRESTOLITE, Description Prestolite Alternator 24V 185A, Mount Centres A 108mm, Mount Leg Thickness 80mm, Pulley Section Not Applicable, Rotation CW, Suits Unit Make Prestolite.

Prestolite Alternator 24V 185A. Part number BLP4112M should be checked first. Listed voltage is 24. Listed output rating is 185. 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 BLP4112M, 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 185 should be checked carefully. Incorrect selection can affect installation time, return freight, and equipment availability.

Compatibility note: Confirm fitment by matching part number BLP4112M, 24V system voltage, 185A rating, mount centres, shaft diameter, rotation, regulator type, and the note regarding diode type battery isolators and dual alternator applications before buying.

FAQ

What is the part number for this alternator?

The part number is BLP4112M. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What voltage and output does it have?

It is a 24V alternator with a 185A power rating. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

Is this alternator new or remanufactured?

It is listed as new. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What type of regulator does it use?

It uses an internal regulator. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

Is it compatible with diode type battery isolators?

No. The note states it is not compatible with diode type battery isolators. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.

What should be checked for dual alternator applications?

For dual alternator applications, regulator R214107437S is required to be installed. For this listing, part number BLP4112M is the main reference point. Listed voltage is 24. Listed output rating is 185. These details should still be checked against the original unit before ordering.