The Bosch Motorsport PBX 190 PowerBox is a programmable power distribution module that eliminates conventional relays, fuses, and circuit breakers from the vehicle electrical system, replacing them with 52 solid-state, diagnostics-capable output channels managed by the Bosch PBX software platform. It is the highest-specification unit in the Bosch Motorsport PowerBox range and a confirmed fitment on the Ferrari 296 GT3 alongside the MS 7.4 ECU and DDU10 display.
The PBX 190’s 48 V high-side switching capability across four dedicated 25 A channels makes it compatible with mild hybrid and 48 V ancillary systems increasingly common in current GT3 regulations — a key differentiator from the 12 V-only PBX 90. Its 4 channels rated to 40 A (parallelable to 80 A) cover high-current loads: starter motors, cooling fans, and electric actuators. The 26 × 15 A channels handle standard ancillary circuits: fuel pump, water pump, cooling solenoids, actuators, and lighting.
All outputs are solid-state high-side switches with individual current monitoring, short-circuit protection, and diagnostic feedback — every circuit’s state is visible in RaceCon and WinDarab V7. The 18 × 16-bit analog inputs allow direct sensor connections for load-side voltage sensing or auxiliary chassis inputs without a separate acquisition device.
LIN control of Bosch Motorsport LIN-bus devices (wiper motors, actuators) is included in the base hardware. The 3 CAN channels separate powertrain, chassis, and customer data busses; 2 Ethernet ports connect to the Bosch system network alongside the ECU and DDU.
Technical Specifications
| Property | Value |
|---|---|
| SKU | F02U.V02.626-04 |
| Total continuous current | 250 A |
| Peak current | 310 A (2 s) |
| Total outputs | 52 |
| High-power outputs — 40 A | 4 × (parallelable to 80 A) |
| High-power outputs — 25 A | 10 × |
| High-power outputs — 15 A | 26 × |
| High-side 48 V outputs — 25 A | 4 × (up to 48 V) |
| Multi-purpose outputs — 15 A | 8 × (LS / HS / push-pull / PWM / H-bridge) |
| Analog inputs | 18 × (16-bit, switchable pull-up) |
| Digital inputs | 10 × (switchable pull-up / pull-down) |
| Sensor supplies | 2 × 5 V / 400 mA (individual ground pin) |
| CAN | 3 |
| Ethernet | 2 |
| LIN | 1 (Bosch Motorsport LIN devices included) |
| Confirmed applications | Ferrari 296 GT3 |
What You Can Do With It
- Replace all relays, fuses, and circuit breakers with programmable solid-state outputs — reducing weight and eliminating mechanical failure points
- Control 48 V ancillary systems alongside standard 12 V circuits from a single unit
- Run high-current loads (starter, fans, actuators) at up to 80 A via paralleled high-power channels
- Monitor every circuit’s current draw and fault state live in RaceCon and WinDarab V7
- Programme complex switching logic — time delays, PWM duty cycles, interlocks, and condition-based activation — without additional relay modules
- Control Bosch Motorsport LIN-bus devices (wiper motors, actuators) natively via the integrated LIN interface
- Connect to the Bosch Motorsport system network (ECU, DDU, VCU) via CAN and Ethernet
Accessories
- MSA-Box II — USB interface for PBX configuration in RaceCon (kept in stock)
- PBX 90 PowerBox — lower-specification 12 V PowerBox for less demanding applications
- MS 7.4 ECU — confirmed Ferrari 296 GT3 system partner
- DDU10 Display — confirmed Ferrari 296 GT3 system partner
- WinDarab V7 — data analysis and PBX diagnostic review (license key)
FAQ
What is the difference between the PBX 190 and PBX 90?
The PBX 190 is the higher-specification unit: 250 A continuous vs the PBX 90’s lower rating, 52 outputs vs fewer on the PBX 90, and — critically — four 48 V high-side outputs for mild hybrid or 48 V ancillary systems not supported by the PBX 90. The PBX 190 is the unit specified in the Ferrari 296 GT3; the PBX 90 suits applications with 12 V-only electrical architectures and lower total current demand.
Does the PBX 190 replace all fuses and relays?
Yes. The PBX 190 is designed to replace all conventional fuses, relays, and circuit breakers in the vehicle electrical system. Each output is a solid-state high-side switch with software-programmable current limits, short-circuit protection, and real-time current monitoring — providing all protection functions of a fuse combined with the switching function of a relay, all with diagnostic visibility.
What software is used to programme the PBX 190?
The PBX 190 is programmed using Bosch PBX software within RaceCon — the same calibration environment as the Bosch Motorsport ECU range. The MSA-Box II USB interface or direct Ethernet connection is used for device communication. All circuit state and current data is available for logging and analysis in WinDarab V7.
Can the PBX 190 handle 48 V systems?
Yes. Four dedicated outputs support up to 48 V at 25 A each — these are independent high-side channels separate from the 12 V main distribution. This enables control of 48 V starter-generators, compressors, and other mild hybrid or 48 V ancillary loads within the same unit as the standard 12 V vehicle circuits.
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