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ARCO Zeus A275L High Output Alternator

ARCO Zeus A275L High Output Alternator

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As low as $897.00
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SKU
AR-A275L

Winner of the 2023 IBEX Innovation Award.

Comparable to and outperforms:
• Balmar XT250
• Nations  XP280
• American Power Systems 360 HPI

THE HIGHEST POWER OUTPUT ALTERNATOR IN ITS SIZE/CLASS

  • • ARCO outperforms competitor's high amp alternators in real world testing. View test results here.
  • • Engineered for High Energy Production.
  • • Suitable for Marine, RV, Military, and Commercial applications.
  • • Rapidly charges large battery banks.
  • • Coolest operating temperatures for increased performance. Runs 8 - 20% cooler than incumbent alternators due to:
      - Heat shedding coatings
      - Rectifier located on housing exterior
      - Dual cooling fans
      - OEM Components
  • • Optimized for performance at idle speeds.
  • • Unleash peak performance with E-Coat/Cerakote. ARCOs advanced coating absorbs less heat, keeping the A275L cooler. This translates to more amperage for sustained periods.
  • • For maximum performance or lithium battery charging, use an ARCO Zeus Bluetooth alternator regulator.
  • • SAE J1171 Certified.
  • • Proudly made in the U.S.A.

 

ARCO has been building high-quality OEM replacement alternators and starters for years. During development of these new high-output alternators, ARCO discovered a gap between published power curves and real-world performance. This was likely due to manufacturers testing under ideal, cooler conditions to achieve higher output figures. To ensure their alternators deliver top performance in everyday use, ARCO implemented rigorous internal testing to evaluate high-performing components under conditions that replicate real-world scenarios.

Specifications:

Voltage 12V
Field Type P
Rotor Poles 16
Stator Size 138mm
Frame Size Large
Weight 14.9 lbs / 6.7 kg
Regulation Internal/External (IE) or External Only (EX)
Output Voltage 14.1V (default)
Finish (Black) Cerakote or E-coating
Cut-In RPM 1,061 Alternator RPM
Maximum Alt RPM 19,000
Battery Post M8 Thread Post, Side Mount
Standard Pulley 49K6 (6-groove, 49mm)
Pulley Mount 17mm diameter shaft, 25mm long, threaded M17 x 1.5
Pulley Hardware M17 x 1.5 x 24mm nut, w/ 18mm ID x 29mm OD washer (Included)
Diodes 6 positive, 6 negative, 50A Rated, Avalanche
Max Output (Cold, 9,000 RPM) 311 Amps
Sustained Cruising Output (Hot, 6,000 RPM) 227 Amps
Sustained Idle Output (Hot, 3,000 RPM) 198 Amps
Max Continuous Operating Temperature 110°C / 230°F

 

A little bit about regulators: ARCO Zeus alternators are available with or without an internal regulator, and all models will accept an external regulator. If an internal regulator is installed, switching to or from an external one is accomplished by simply moving a wire.

Applications:

Mounting ARCO Part Number Application
1-2” Single Foot A275L-12-SF12-EX-49K6
A275L-12-SF12-IE-49K6
Replaces most domestic styles using a single 1” or 2” mounting foot
(e.g., Motorola, Prestolite)
3.15” J180 Saddle A275L-12-DF315-EX-49K6
A275L-12-DF315-IE-49K6
Replaces most small case styles using a 3.15" J180 saddle style mount
(e.g., Hitachi, Lucas, Mitsubishi) Most Yanmars.
4” J180 Saddle A275L-12-DF4-EX-49K6
A275L-12-DF4-IE-49K6
Replaces most Volvo Penta alternators using a 4” J180 saddle style mount
Vortec A275L-12-VT-EX-49K6
A275L-12-VT-IE-49K6
Replaces Mando type alternators using Vortec/ GM pad mounting feet
(Found on many Mercruiser and Volvo Penta 3.0GLM, 3.0GLP, 4.3GXi, 5.7GiL, 5.7GXiL Marine Engines.)
(GM Blocks)
N62 A275L-12-N62-EX-49K6
A275L-12-N62-IE-49K6
Replaces most Mercedes and BMW alternators
Mercedes Sprinter 1999-2006 alternators
Mercedes Sprinter Factory dual alternator 2007-Up Replacement
Transit A275L-12-TR-EX-49K6
A275L-12-TR-IE-49K6
Replaces Ford Transit alternators 3.5L & 3.7L Gas engines 2015-2022
N62 (Clutch Pulley) A275L-12-N62-EX-50K6CP
A275L-12-N62-IE-50K6CP
Mercedes Sprinter 1999-2006 alternators
Mercedes Sprinter Factory dual alternator 2007-Up Replacement
Replaces Roadtrek Mercedes Dual alternator

 

ARCO Zeus alternators come in many frame, regulator, and pulley combinations :

Voltage Max output Amps Sustained Idle output amps Housing Pulley Unit Part #
12V 310 198 Ford Transit External Only 49mm K6 (6 groove) A275L-12-TR-EX-49K6
12V 310 198 Ford Transit Internal or External 49mm K6 (6 groove) A275L-12-TR-IE-49K6
12V 310 198 Vortec (GM) External Only 49mm K6 (6 groove) A275L-12-VT-EX-49K6
12V 310 198 Vortec (GM) Internal or External 49mm K6 (6 groove) A275L-12-VT-IE-49K6
12V 310 198 N62 External Only 49mm K6 (6 groove) A275L-12-N62-EX-49K6
12V 310 198 N62 Internal or External 49mm K6 (6 groove) A275L-12-N62-IE-49K6
12V 310 198 N62 External Only * 50mm K6 Clutch Pulley * A275L-12-N62-EX-50K6CP
12V 310 198 N62 Internal or External * 50mm K6 Clutch Pulley * A275L-12-N62-IE-50K6CP
12V 310 198 1"-2" Single Foot External Only 49mm K6 (6 groove) A275L-12-SF12-EX-49K6
12V 310 198 1"-2" Single Foot Internal or External 49mm K6 (6 groove) A275L-12-SF12-IE-49K6
12V 310 198 3.15" J180 External Only 49mm K6 (6 groove) A275L-12-DF315-EX-49K6
12V 310 198 3.15" J180 Internal or External 49mm K6 (6 groove) A275L-12-DF315-IE-49K6
12V 310 198 4" J180 External Only 49mm K6 (6 groove) A275L-12-DF4-EX-49K6
12V 310 198 4" J180 Internal or External 49mm K6 (6 groove) A275L-12-DF4-IE-49K6

* N62 with 50mm clutch pulley complies with Mercedes aftermarket equipment requirements.