Complete part number, mating pair, insert and contact allocation
Connector project selection
Connector Rated Voltage vs Dielectric Withstand
Separate connector rated working voltage from dielectric withstand test values. Configuration, conditions and supporting documents must be confirmed before selection.
Selection priorities
Define the key engineering inputs
Controlled source and revision for every stated value
Required normal operating voltage
System waveform and frequency when AC
Duty, duration, repetition and transient profile
Contact size, circuit allocation, energized pairs and grounding
Operating and storage temperature range
Installation altitude or pressure condition
Project fit
Application and configuration review
Rated working voltage and dielectric withstand describe different evidence fields. The first belongs to normal-use selection; the second is a test value that must retain its waveform, duration, setup and acceptance conditions.
Rated working voltage must be checked for the selected connector configuration, circuit allocation, AC or DC system and applicable environmental and insulation-coordination conditions.
Dielectric withstand must remain attached to the source label and test conditions. Record whether the value is AC or DC, the duration, leakage or trip criterion, test points, atmospheric conditions and any altitude or conditioning requirement when the controlled source provides them.
Engineering conversation
Translate the requirement into a configuration
Insulation resistance, temperature rise and derating answer separate questions.
The examples below preserve each product catalog label and series boundary. They are not cross-series design rules, current supply commitments or permission to use a value for another configuration.
| MY10X | Rated voltage; dielectric withstand | 400 V rated voltage; 1,000 V dielectric withstand | The product page separates a rated-voltage field from a dielectric-withstand field. | Selected configuration, current revision and test conditions. |
Discuss engineering inputsInquiry checklist
What to send with your request
- Complete part number, mating pair, insert and contact allocation
- Controlled source and revision for every stated value
- Required normal operating voltage
- System waveform and frequency when AC
- Duty, duration, repetition and transient profile
- Contact size, circuit allocation, energized pairs and grounding
- Operating and storage temperature range
- Installation altitude or pressure condition
Frequently asked questions
Plan the next engineering step
Is dielectric withstand the same as rated working voltage?
No. Keep them as separate evidence fields.
Can rated working voltage be calculated from a withstand value?
Not from the evidence in this project. No fixed conversion ratio is supported; the applicable rating and conditions must come from controlled documentation for the selected configuration.
What conditions should accompany a withstand value?
Where the controlled method provides them, record AC or DC, duration, test points, environment, altitude or pressure, conditioning and acceptance criteria.
Do insulation resistance and dielectric withstand prove the same thing?
No. They are separate test or rating fields and must retain their own method, voltage, environment, limit and configuration.
Why are the 300 V, 500 V, 700 V, 3,000 VAC and 4,000/1,500 VAC examples not a conversion table?
Each number comes from a different product series page and retains that page's field label.
Where should a sensitive or unclear application be submitted?
Use Compliance Review.
Related pages
Continue your project review
ResourcesResource parent→Engineering / Selection SupportOrdinary civil technical questions→Compliance ReviewSensitive or unclear route→EV High-Voltage ConnectorsRelated category context→Industrial Circular ConnectorsRelated category context→Connector Cross-Reference EvaluationConfiguration evidence method→
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