Sepura 300-00066 Vehicle Radio Power Lead Assembly 12 VDC

The Sepura 300-00066 Vehicle Radio Power Lead Assembly connects SRG3500 and SRG3900 vehicle-mounted terminals to the power, ignition, audio, and control paths within a vehicle. Its principal practical benefit is bringing these routes together in a defined assembly instead of treating them as unrelated wiring items. It operates from a 12 VDC supply and provides a 15-pin female D-sub connector for the radio and a 2-pin Molex connector for the loudspeaker. The power, GPIO, and ignition ends are unterminated so the installer can complete them for the vehicle installation. Ignition sense and four GPIO lines are included, together with fuses, fuse holders, and ring terminals. It therefore suits an organisation maintaining compatible Sepura mobile terminals and needing an identifiable connection part for an installation or an existing fleet.

Role of the Sepura 300-00066 Vehicle Radio Power Lead Assembly

The assembly forms the wired interface between the radio terminal and the vehicle paths required for supply, audio, ignition awareness, and control. Its radio side uses the 15-pin female D-sub connector, while the loudspeaker branch uses the 2-pin Molex connector. Power, GPIO, and ignition reach the installer as unterminated ends, making termination a planned part of the fitting work. Included ignition sense allows the vehicle’s ignition state to be considered in the connection design, while the four GPIO lines provide routes for the control functions defined by the installation project. The operational value is not an additional radio function. It is a structured way to connect a compatible SRG3500 or SRG3900 terminal while keeping the loudspeaker branch distinct from the power, ignition, and GPIO routes.

Planning Cable and Branch Routes in the Vehicle

The cable length is 5,000 mm excluding connectors, a dimension that should be included in the route plan before fitting begins. The loudspeaker branch is 200 mm, the GPIO branch is 500 mm, and the power and ignition branch extends 5,000 mm. These figures let the installation lead compare the locations of the terminal, loudspeaker, supply point, and control paths with the available reach. Route planning is relevant in security, operations, and field-service vehicles because the position of each component determines how the assembly must run and where its branches can be secured. The fact that the stated 5,000 mm excludes connectors also matters when checking physical reach. Using the specified dimensions in the initial layout helps avoid moving the terminal or loudspeaker after termination and mounting work has started.

Fit for Saudi Fleet Operations

The assembly serves fleets that use Sepura SRG3500 or SRG3900 TETRA vehicle-mounted terminals. A facilities security team can apply it when preparing patrol vehicles equipped with either compatible terminal. It can also fit service vehicles used by facilities operations teams that need a mounted communications terminal while moving between sites. In logistics or industrial operations, the product is relevant when the compatible terminal forms part of a supervision or response vehicle. The fit decision begins by matching the terminal model, then confirming the 12 VDC supply, and then checking loudspeaker, supply, and control locations against the branch lengths. This sequence lets a fleet manager assess the assembly against the intended vehicle layout before handing the work to an installer, rather than relying on the Sepura brand name alone.

Position within the Vehicle Radio System

Model 300-00066 is a power and connection lead assembly for a mobile terminal, so its role differs from that of the complete radio terminal or a separate audio accessory. SRG3500 and SRG3900 are the compatible end devices to which the assembly connects, while the product provides the radio, loudspeaker, power, ignition, and GPIO paths. That distinction matters when preparing a purchase request. The assembly line should carry model 300-00066 and a lead-assembly description so it is not confused with the terminal or the loudspeaker. TETRA identifies the radio environment of the compatible equipment, but the wiring assembly remains an installation component rather than an independent communications device. Asset managers can therefore record it among installation accessories for Sepura mobile terminals and associate it with the intended vehicle and terminal during receipt, fitting, and maintenance.

Checks to Complete before Installation

Verification starts by matching the terminal to SRG3500 or SRG3900 and checking the vehicle’s 12 VDC supply. The installer can then locate the 15-pin female D-sub connection at the radio and the 2-pin Molex connection at the loudspeaker before planning the unterminated power, GPIO, and ignition routes. The 200 mm loudspeaker branch, 500 mm GPIO branch, and 5,000 mm power and ignition branch should be allocated before the ends are completed. Fuses, fuse holders, and ring terminals come with the assembly and can be included in the receipt check before work starts. This review gives the installation team a product-specific checklist covering terminal compatibility, supply voltage, connector locations, branch dimensions, ignition sense, and the four GPIO lines.

Managing a Lead for Legacy Equipment

The assembly is discontinued and identified for legacy equipment, making its clearest operational context the support of existing Sepura installations using SRG3500 or SRG3900 terminals. Procurement should tie the requirement to model 300-00066 and the actual vehicle-mounted terminal instead of treating the product as a generic cable. Recording the lifecycle status with the vehicle and terminal identity helps direct the part to planned maintenance or replacement work within the fleet. On receipt, staff can check the radio connector, loudspeaker connector, unterminated ends, fuses, fuse holders, and ring terminals against the assembly description. This discipline is useful for organisations retaining older communications equipment because the exact model, electrical supply, connectors, and terminal compatibility become central to the decision before a vehicle is scheduled for technical work.

A Purchase Decision Based on Fit and Execution

Model 300-00066 suits an organisation with an SRG3500 or SRG3900 vehicle-mounted terminal that needs an assembly combining 12 VDC power, ignition sense, a loudspeaker route, and four GPIO lines. Before quantity approval, the operations manager can review the fleet’s terminal models and compare the cable and branch dimensions with each installation layout. The technician can then define the termination work for the power, GPIO, and ignition ends while retaining the 15-pin D-sub radio connector and 2-pin Molex loudspeaker connector as inspection points. Included fuses, fuse holders, and ring terminals support preparation of the power path designed into the assembly. The resulting purchase decision is linked to a specific job: fitting or maintaining a compatible Sepura vehicle terminal in a legacy TETRA system, with connection requirements that can be checked before work begins.