Distinguish continuous current from make, break and fault duty.
Yeeparts category guide
EV High-Voltage Switching & Safety
Review high-voltage contactors, relays and manual service disconnect components used for switching, isolation and service access. Selection should consider circuit architecture, continuous and breaking current, voltage, coil control, auxiliary contacts and safety function.
Confirm coil voltage, economizer and auxiliary-contact feedback.
For an MSD, define service isolation, fuse and HVIL requirements.
Include temperature, vibration, mounting and electrical-life needs.
Prepare a clearer RFQ
Provide the exact part number or circuit requirement, system voltage, continuous and breaking current, coil voltage, contact form, auxiliary contacts, mounting, quantity and destination.
Current catalog
Products in HV Switching & Safety
Buyer FAQ
Questions before requesting a quote
What is the difference between a contactor and a manual service disconnect?
A contactor is electrically controlled for circuit switching. An MSD provides a manual service-isolation point and may include additional safety functions.
Is continuous current enough to select a contactor?
No. Voltage, make and break duty, short-circuit strategy, coil control, thermal conditions and electrical life also matter.
Can an existing contactor be replaced by a similar current rating?
Not without checking the complete electrical, mechanical and control specification, including mounting and auxiliary contacts.
What documents should be requested for safety components?
Specify the drawing, test report, traceability record or certificate required by the project. Documents are confirmed with the RFQ.
Have a part number or technical requirement?
Send the quantity, destination and application details for a tailored sourcing review.