PX-525 Series (250 Amps)   Heavy-Duty Charging Systems

PX-5RD-250 (Ford) PX-5TD-250 (Ford) PX-5GD-250 (Chevy/GMC)
PX-5TD also available as a PX-5TD6-250 with posts at 6 O'clock (looks like PX-5TD6-230)
(Complete kit consists of an alternator w/pulley, external voltage regulator, and harness)   See One Installed Click Here

For additional PX-5TD ordering information CLICK HERE
To see our Application Guide CLICK HERE
To see the 230 Amp PX-520 Series CLICK HERE
For a comparison of the 230 amp and 250 amp models CLICK HERE
   To go to the current PX-5 Parts pages CLICK HERE

PX-4000 Voltage Regulator

(PX-7000 used on 2009-up Fords)


250/210 AMPS

Model PX-525 Tested and Proven

Rotor RPM

Amps @ 13.5 volts


HOT (200?

1800 95 80
2000 125 105
2250 145 120
2500 175 145
2750 190 160
3000 205 170
3500 225 185
4000 235 195
4500 240 200
5000 250 210


Special Features:

  • Dual 5/16" positive output posts.

  • Heavy duty hand wound high output stator.

  • Heavy duty balanced rotor.

  • Heavy duty long life brushes.

  • Heat sinks designed for efficient cooling.

  • Heavy duty bearings with high temperature seals and grease.

  • Eighteen (18) press fit 60 amp diodes.

  • Specially designed heavy duty regulator that produces higher output ratings: runs cooler than current industry standards.

  • Regulator has ground fault and high voltage protection.

  • GXL wire is standard in all harnesses.

  • Weight: approximately 25 lbs.



  • 24 volt systems are available.

PennTex Industries recommends using a minimum of 2 gauge battery and ground cable. For maximum performance, route 2 gauge battery cable, or larger, from the alternator battery post directly to the positive stud of the battery. The ground cable from the alternator should also be a minimum of 2 gauge cable and be bolted directly to a chassis ground or to the negative side of the battery.


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To figure out the alternator rotor RPM on your vehicle Click HERE

To go to our Alternator Application Guide Click HERE

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