Overview
The Allen-Bradley 1336-135254 precharge board is a critical component in the Bulletin 1336 family of microprocessor-controlled AC drives. This printed circuit board manages the precharge function in variable frequency drives rated for 480 Volts AC, protecting power electronics during startup and fault conditions. As a standard spare part, it provides exact electrical and mechanical compatibility with B100-rated 1336 drives.
Key Features
- 480 Volts AC rated for standard industrial power systems
- 15 mA current rating for precharge circuit management
- Direct replacement for 1336 PLUS, PLUS II, FORCE, and IMPACT drive series
- Mounts to base drive assembly using standard screws and connectors
- Proven reliability in three-phase motor control applications
Technical Specifications
| Voltage Rating | 480 Volts AC |
| Current Rating | 15 milliamps |
| Part Type | Precharge Assembly Board (PCB) |
| Compatible Drive Ratings | B100 (100 HP / 150 Amps) |
| Input Voltage Options | 380V, 415V, 480V AC |
| Operating Temperature Range | 0–40°C (NEMA 4/12 rated) / 0–50°C (Open rated) |
| Enclosure Ratings | NEMA 4 (IP 65), NEMA 12 (IP 54), Open (IP 00) |
| Connectors | J6, J7, E1 main control board interface |
| Mounting | Screw-mount to drive base plate assembly |
| Board Position | Above base driver/power supply board |
| Manufacturer | Allen-Bradley / Rockwell Automation |
Typical Applications
The 1336-135254 precharge board is used in:
- Three-phase induction motor speed control and soft-starting
- Industrial pump and fan motor drive systems
- Conveyor belt and material handling equipment
- HVAC system compressor and blower drives
- Manufacturing process automation requiring adjustable frequency output (PWM)
- Facilities where 480V three-phase AC power is standard
Compatibility & Replacements
This board is a direct functional replacement within the Allen-Bradley 1336 drive family. It maintains compatibility with:
- 1336 PLUS drives
- 1336 PLUS II drives
- 1336 FORCE drives
- 1336 IMPACT drives
- 1336 REGEN regenerative drives
The board works with firmware versions 2.03 through 4.03. Original alternative designation: SP-135254. Installation requires a #2 Phillips screwdriver, flat blade screwdriver, and needle-nose pliers. Always remove drive power and allow 60 seconds before servicing.
