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Discussion History

Low-Voltage System

Assembly

The 24 V auxiliary electrics for lighting, controls, and instruments, fed from a DC-DC converter. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Low-Voltage System parts and their functions

7 top-level parts · 26 parts in total · full bill of materials below
Low-Voltage System parts diagram: 1 DC-DC converter, 2 auxiliary battery, 3 distribution box, 4 relay, 5 wire bundle, 6 light cluster, 7 driver display. 26 parts in 7 top-level items.
Low-Voltage System parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.
#PartQtyWhat it does
1 DC-DC Converter 4 parts 1× Steps 600 V down to 24 V
2 Auxiliary Battery 2× Lead-acid backup batteries
3 Distribution Box 1× Fuses and relays
4 Relay 8× Switching relays
5 Wire Bundle 1× Main wiring loom
6 Light Cluster 6× External lamp clusters
7 Driver Display 3 parts 1× Instrument display

3D model

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Build & assembly graph

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Bill of materials for Low-Voltage System

7 top-level lines · 14 rows shown · 26 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 DC-DC Converter 4 parts trolleybus-dc-dc-converter 1× 1 5 assembly
1.1 Bare PCB pcb-bare 1× 1 · part
1.2 IGBT Module trolleybus-igbt-module 2× 2 · part
1.3 SMD Passive (R/C/L) smd-passives 1× 1 · part
1.4 Inverter Heatsink trolleybus-inverter-heatsink 1× 1 · part
2 Auxiliary Battery trolleybus-aux-battery 2× 2 · part
3 Distribution Box trolleybus-distribution-box 1× 1 · part
4 Relay relay 8× 8 · part
5 Wire Bundle wire-bundle 1× 1 · part
6 Light Cluster trolleybus-light-cluster 6× 6 · part
7 Driver Display 3 parts trolleybus-driver-display 1× 1 3 assembly
7.1 LCD Panel lcd-panel 1× 1 · part
7.2 Bare PCB pcb-bare 1× 1 · part
7.3 Microcontroller mcu 1× 1 · part

Where the low-voltage system is used

1 product across 1 domain contain it, directly or inside a sub-assembly

Used in 1 assembly

Trolleybus

Sourcing: possible vendors

Browse the supplier directory → Prices, MOQ, and lead times are algorithmic estimates, not quotes, and not claims about these companies. Company mappings are curated by keyword; est. price band $0.50–$100. How estimates work
VendorHQSpecialtyMOQLead time
🇨🇳Foxconn
foxconn.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Flex (Singapore)
flex.com ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks
🇮🇳Dixon Technologies
dixoninfo.com ↗ 		Noida, IN Electronics contract mfg 1,000 pcs 6–10 wks
🇨🇳BYD Electronics
bydelectronic.com ↗ 		Shenzhen, CN Electronics contract mfg 1,000 pcs 6–10 wks
🇸🇬Venture Corp
venture.com.sg ↗ 		Singapore Electronics contract mfg 1,000 pcs 6–10 wks