SpeedyBee Short-Circuit Protector Smart Power Tester
by Speedybee

The SpeedyBee Short-Circuit Protector Smart Power Tester (SKU: SB-F4V5-E-FUSE) is a solid-state electronic fuse (e-Fuse) smoke stopper and inline power diagnostic meter engineered for safely powering up and troubleshooting FPV drones, flight controllers, ESCs, and RC electronics. Unlike traditional thermal PTC or filament bulb smoke stoppers that merely restrict current flow during a fault, this smart electronic protector completely disconnects input voltage within approximately 5 milliseconds the moment a short circuit or over-current condition is detected, preventing costly damage to sensitive onboard components caused by solder bridges or wiring errors.

Designed for benchtop builds and field diagnostics across 4S to 6S LiPo power systems, the unit features industry-standard XT60 male input and XT60 female output interfaces in a compact 70 x 23 mm inline housing. Builders can toggle between 1A and 2A trip thresholds to match low-power bench checks or full multirotor electronics stacks, control power delivery via an integrated manual on/off switch, and monitor live voltage and current consumption directly on the built-in digital display.

Key Features

• True Solid-State Voltage Cutoff (~5ms Response): Completely severs input power within approximately 5 milliseconds upon detecting a short circuit or current surge, eliminating sustained fault current through flight stacks and video transmitters.

• Dual Selectable Trip Thresholds (1A / 2A): Switchable 1A and 2A current cutoff levels accommodate both delicate low-draw receiver/FC testing and full multirotor avionics power-up sequences.

• Real-Time Digital Voltage & Current Display: Integrated digital readout continuously displays live input voltage and real-time amperage draw during bench testing and troubleshooting.

• Integrated Manual On/Off Power Switch: Dedicated physical switch enables convenient power cycling of connected aircraft electronics without repeatedly unplugging the flight battery.

• Universal XT60 Inline Architecture: Equipped with direct XT60 male and female connectors in a compact 70 x 23 mm form factor for plug-and-play insertion between a 4S–6S LiPo pack and aircraft power lead.

Technical Specifications

• Brand / Manufacturer: SpeedyBee

• Model Identifier: SpeedyBee Short-Circuit Protector Smart Power Tester

• Manufacturer SKU / Part Number: SB-F4V5-E-FUSE

• Device Type: Solid-State Electronic Fuse (e-Fuse) Smoke Stopper & Inline Power Meter

• Input Voltage Range: 4S – 6S LiPo

• Selectable Trip Current Levels: 1A / 2A (Switchable)

• Short-Circuit Response Time: ~5 ms

• Protection Action: Full Input Voltage Cutoff

• Connectors: XT60 Male (Input) / XT60 Female (Output)

• Display: Built-In Digital Voltage & Current Readout

• Power Control: Manual On/Off Switch

• Dimensions: 70 mm x 23 mm

What Is Included

• (1) SpeedyBee Short-Circuit Protector Smart Power Tester (SKU: SB-F4V5-E-FUSE)