Step Switching

Assembly

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Bank of contactors that switch resistor groups in binary-weighted steps for fine load resolution.

Direct parts	5
Total parts	30
Class	Assembly

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Bank of contactors that switch resistor groups in binary-weighted steps for fine load resolution. A full specification article for this item is being written. Meanwhile its bill of materials and connections are below.

Step Switching parts and their functions

5 top-level parts · 30 parts in total · full bill of materials below

Step Switching parts diagram: 1 load step contactor, 2 step fuse, 3 control transformer, 4 wire bundle, 5 connector. 30 parts in 5 top-level items. — Step Switching parts diagram. Numbers match the table below; each box is one top-level part or assembly with what it contains.

#	Part	Qty	What it does
1	Load Step Contactor	12×	One per load step
2	Step Fuse	12×	Branch fuse protecting each resistor step circuit.
3	Control Transformer	1×	Step-down transformer deriving the 230 V control and fan supply from the test source or auxiliary input.
4	Wire Bundle	1×	Group of insulated conductors cut to length, terminated, and bound together to carry power and signals between the assemblies of a machine.
5	Connector	4×	Mating plug-and-socket pair that joins two lengths of wiring or a cable to a board so a circuit can be assembled, serviced, and separated without soldering.

3D model

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Build & assembly graph

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Bill of materials for Step Switching

5 top-level lines · 5 rows shown · 30 parts total · indented to 3 levels

#	Item / sub-assembly	Part no.	Qty/assy	Ext. qty	Parts	Type
1	Load Step Contactor	load-bank-contactor	12×	12	·	part
2	Step Fuse	load-bank-step-fuse	12×	12	·	part
3	Control Transformer	load-bank-control-transformer	1×	1	·	part
4	Wire Bundle	wire-bundle	1×	1	·	part
5	Connector	connector	4×	4	·	part

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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

Vendor	HQ	Specialty	MOQ	Lead 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