Product Overview

The ALLEN-BRADLEY 1305-BA03A is a compact, high-performance adjustable frequency AC drive from Rockwell Automation’s esteemed Bulletin 1305 product family. This variable frequency drive (VFD) is specifically engineered to provide precise speed, torque, and starting current control for three-phase AC induction motors across a wide variety of industrial applications -3-6. As part of the 1305 Series, the ALLEN-BRADLEY 1305-BA03A is designed to offer a balance of performance, reliability, and user-friendly operation, making it an ideal choice for applications with power requirements up to 0.75 kW (1 HP) -10.

The ALLEN-BRADLEY 1305-BA03A operates on a standard three-phase input voltage of 380 to 460 VAC and delivers an adjustable output frequency from 0 to 400 Hz, providing a wide speed control range -1-3. Its robust NEMA Type 1 (IP30) enclosure is well-suited for indoor industrial environments, offering protection against limited dust and solid objects -3-4. The drive supports multiple control methods, including Standard V/Hz and Custom V/Hz, providing the flexibility needed to optimize performance for various motor and load types -1-3. While the ALLEN-BRADLEY 1305-BA03A has been officially discontinued by the manufacturer, it remains a widely utilized and supported component in countless legacy systems, prized for its reliability and straightforward integration into existing Allen‑Bradley automation architectures -3-7.

 

Technical Specifications

Parameter Name	Parameter Value
Product Model	1305-BA03A
Manufacturer	Allen-Bradley / Rockwell Automation
Product Type	Adjustable Frequency AC Drive (VFD)
Series	Bulletin 1305 AC Drives
Input Voltage	380 – 460 VAC, 3-Phase
Input Current	2.2 A -1
Output Voltage	0 – 460 VAC, 3-Phase
Output Current	2.3 A -1-3
Output Power	0.75 kW / 1 HP
Output Frequency	0 – 400 Hz -1-3
Control Method	Standard Boost V/Hz, Standard Volts/Hz, Custom Volts/Hz -1-3
Discrete Inputs	Eight (8) Contact Closure -3
Analog Inputs	One (1) 0…10V and One (1) 4…20 mA -3-6
Discrete Outputs	Two (2) Programmable Outputs -3
Analog Output	One (1) 0…10 VDC -6
Efficiency	97.5% (typical) -3
Power Dissipation	34 W -3
Enclosure Rating	IP30 / NEMA Type 1 -3-4
Operating Temperature	0…50 °C -3-4
Storage Temperature	-40…+70 °C -3
Relative Humidity	0 to 95% (non-condensing) -3
Vibration (Operational)	1.0 G -3
Dimensions (W x H x D)	170 mm x 195 mm x 179 mm -3
Weight	Approx. 3.6 kg (8.0 lbs) -1-3
Product Status	Discontinued by Manufacturer -3

 

Main Features and Advantages

The ALLEN-BRADLEY 1305-BA03A offers a compelling feature set that delivers reliable motor control in a compact footprint. Its core strength lies in its ability to provide precise speed regulation, which helps improve process control and reduce energy consumption in applications ranging from simple fan and pump control to more complex machinery.

Flexible control and I/O:
The ALLEN-BRADLEY 1305-BA03A is equipped with eight discrete inputs, a comprehensive analog I/O suite, and supports multiple V/Hz control profiles. This versatility allows it to be tailored to diverse application requirements, whether simple speed control or more sophisticated torque management is needed -1-3. The drive also features a dedicated external speed potentiometer input, facilitating straightforward manual operator control -3.

Enhanced application performance:
To meet the demands of specific applications, the ALLEN-BRADLEY 1305-BA03A includes advanced features such as an adjustable [% COMP. RI] parameter for improved low-speed torque by compensating for stator resistance, and a [NOMIN SLIP] parameter that compensates for the inherent slip of an induction motor to maintain shaft speed under heavy load conditions -12. The drive also includes a hard current limit with a fast frequency fallback, allowing it to continue operating under harsh or overload conditions -12.

Rugged and reliable design:
Built with a NEMA Type 1 (IP30) enclosure, the ALLEN-BRADLEY 1305-BA03A is designed for safe indoor installation where it is protected from falling dirt and light splashing water -4-5. Its high 97.5% efficiency rating ensures minimal energy loss, contributing to lower operating costs -3. Furthermore, the drive features protective functions including temperature sensing trips and DC bus voltage monitoring for insufficient or excess voltage, safeguarding the drive and motor from damage -3.