C3 / C4 - 2.5 A Device Plug (IEC 60320)
Historic 2.5 A two-pin variant - largely replaced by C13/C14 today.
The C3/C4 coupling was historically a two-pole IEC 60320 variant with 2.5 A rated current and 70 deg C conductor temperature. Designed for small household devices without protective earth, it is rarely used in new designs - the modern equivalent is C13/C14 (with earth) or C7/C8 (without).
Technical Specifications
| Standard | IEC 60320 C3 / C4 |
| Rated current | 2.5 A |
| Voltage | 250 V AC |
| Poles | 2 |
| Class | II |
| Max conductor temp. | 70 °C |
| Status | Nearly obsolete |
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Frequently Asked Questions
Is C3/C4 still produced?
Almost not at all. For replacement, check whether the device can be retrofitted to C7/C8 or C13/C14.
How does it differ from C5/C6?
C5/C6 (cloverleaf) is 3-pin WITH earth and rated 2.5 A at 70 deg C - the modern class I solution in this current class.
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