VT-VRPA1-150-12/V0/0 Bosch Rexroth Indramat
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MPN: R901057058
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The Bosch Rexroth Indramat VT-VRPA1-150-12/V0/0 is part of the VT-VRPA Electric Amplifiers series and features a nominal supply voltage of 24 VDC with a max solenoid current of 2.2 Amps. This amplifier card measures 100 by 160 mm, has a fuse rating of 2.5 Amps, and weighs 0.15 kilograms. It utilizes a 32-pin blade connection and its oscillator runs at 2.5 kHz.
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Product Description:
The VT-VRPA1-150-12/V0/0 is an electric amplifier card produced by Bosch Rexroth Indramat for the VT-VRPA Electric Amplifiers series. Mounted on a standardized Eurocard carrier, it supplies controlled current to proportional solenoid valves used in hydraulic and pneumatic machinery. By regulating load current and providing a stabilized reference voltage, the board ensures that valve spool position responds linearly to command signals, supporting precise force, speed, or pressure regulation in automated production lines.
As a power interface, the card requires a nominal bus voltage of 24 VDC. Operation remains stable from 22 V to 35 V, allowing for supply variations inside control cabinets. Under rated conditions, the electronics draw less than 1.5 A, while the output stage can deliver a peak solenoid current of 2.2 A within a ±10% range to match typical proportional coils. A pulse-width-modulated oscillator operating at 2.5 kHz drives the output stage, and the regulation circuit maintains an auxiliary ±9 V reference within a ±1% range. The same circuit supplies ±25 mA to external feedback loops, allowing position sensors to operate without separate power supplies.
The fiberglass board measures 100 × 160 mm, the front aluminum plate rises 128.4 mm above the guide rails, and the solder side occupies 5.08 mm of slot width. Power and signals pass through a 32-pin Form D blade connector, while an internal relay protected by a 2.5 A T glass fuse disconnects the load during faults. Continuous power dissipation remains below 35 W, and heat is released through natural convection. The connected coil has a resistance of 5.4 Ω, which supports the card’s current-control range. The card weighs 0.15 kg, keeping the installed load on its Eurocard carrier low.
