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Voltage Ratings

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Voltage ratings are in accordance with DIN VDE 0100, and are based on the Test Voltage (the maximum voltage before insulation break-down or spark-over) and a rating factor based on the environment in which the connector is used. Check local applicable standards to ensure compliance, if required.

* Caution: voltage rating standards have changed since this page was published. Use the information on this page as a guide only. *

Class A0
Low power equipment used in air-conditioned or dry rooms in circuits that do not permit significant heat generation under short-circuit conditions.
Class A
Equipment used in air-conditioned and dry rooms.
Class B
Equipment in dwelling spaces, offices and commercial rooms, light assembly areas, laboratories, clinics, hospitals etc.
Class C
General industrial, commercial, agricultural, manufacturing, un-air conditioned warehouses etc.
Class D
Unprotected connectors on vehicles exposed to brake dust, splashing, snow & ice.
Maximum Operating Voltage Ratings per DIN VDE 0100
Test V Environmental Class
A0 A B C D
AC DC AC DC AC DC AC DC AC DC
375 12 15
500 60 75 30 36
625 125 150 60 75
750 250 300 125 150 30 36
875 380 450 250 300 60 75 12 15
1,000 500 600 380 150 125 150 60 75
1,250 660 800 500 600 250 300 125 150 12 15
1,500 750 900 660 800 60 75
1,750 1,000 1,250 750 900 380 150 250 300 125 150
2,000 500 600
2,250 1,000 1,200 380 450 250 300
2,500 660 800
2,750 750 900 500 600
3,000 380 450
3,500 1,000 1,200 750 900 500 600
4,000 660 800
4,500 1,000 1,200 750 900
5,500 1,000 1,250
Example:
The C5273-4-ET015-2N-0-AM insert has a test voltage rating of 1,750V.
When used in a steel mill (Class C) it would have a working rating of 250V AC.
When used on a flight simulator (Class A) it would have a working rating of 750V AC.

Current Ratings

Current ratings are limited by the acceptable rise in temperature of the contact. This is affected by a number of factors, including:

  1. The allowable temperature of the connector.
  2. Ambient temperature.
  3. The current.
  4. Heat transfer (affected also by the number of pins, their proximity, and the current flowing in adjacent pins).
  5. The material of the connectors, and the plating.

Single Contacts

Current ratings for single pins are given in the table below, based on: 120°C temperature, 23° ambient, single contact, silver plated brass

Max. Current for single contacts
Contact Dia. (mm) Max. Current (A)
1.5 35
3 45
4 50
5 80
6 110

Multiple Contacts

Ratings for multiple contacts are greatly complicated by thermal limitations. The "per pin" ratings given in the specification tables for the inserts 95274, 95275, 95273 and 95273 Quick-Change are de-rated based on the number of contacts in the insert, and the probable average loading of each contact.

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