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DC Input Stage

Assembly

Front-end DC bus handling 1500 V DC from battery or PV, with protection, isolation, and inrush limiting. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

DC Input Stage parts and their functions

9 top-level parts · 12 parts in total · full bill of materials below
DC Input Stage parts diagram: 1 DC busbar, 2 DC fuse, 3 DC contactor, 4 pre-charge resistor, 5 pre-charge relay, 6 DC EMI filter, 7 DC surge protector, 8 DC disconnect switch, 9 insulation monitor. 12 parts in 9 top-level items.
DC Input Stage 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 Busbar 1× Laminated copper DC busbar rated 1500 V
2 DC Fuse 2× High-speed DC fuses on positive and negative rails
3 DC Contactor 2× Main DC contactors for connect and disconnect
4 Pre-charge Resistor 1× Pre-charge resistor limiting DC link inrush current
5 Pre-charge Relay 1× Pre-charge bypass relay sequencing the soft start
6 DC EMI Filter 1× Common-mode and differential DC EMI filter
7 DC Surge Protector 2× DC surge protective devices on each pole
8 DC Disconnect Switch 1× Manual load-break DC isolator switch
9 Insulation Monitor 1× Ground fault and insulation resistance monitor

3D model

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Build & assembly graph

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Bill of materials for DC Input Stage

9 top-level lines · 9 rows shown · 12 parts total · indented to 3 levels
# Item / sub-assembly Part no. Qty/assy Ext. qty Parts Type
1 DC Busbar grid-forming-inverter-dc-busbar 1× 1 · part
2 DC Fuse grid-forming-inverter-dc-fuse 2× 2 · part
3 DC Contactor grid-forming-inverter-dc-contactor 2× 2 · part
4 Pre-charge Resistor grid-forming-inverter-precharge-resistor 1× 1 · part
5 Pre-charge Relay grid-forming-inverter-precharge-relay 1× 1 · part
6 DC EMI Filter grid-forming-inverter-dc-emi-filter 1× 1 · part
7 DC Surge Protector grid-forming-inverter-dc-spd 2× 2 · part
8 DC Disconnect Switch grid-forming-inverter-dc-disconnect 1× 1 · part
9 Insulation Monitor grid-forming-inverter-insulation-monitor 1× 1 · part

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Where the DC input stage is used

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

Used in 1 assembly

Grid-Forming Inverter

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