Side-by-Side Comparison
Jack Connectors
2.5mm TRRS vs. RCA
Comparing 2 standards across 10 specifications. 10 key differences identified.
Comparing:
2.5mm TRRS
RCA
2.5mm TRRS adds a microphone conductor to the 2.5mm TRS jack, following the same CTIA or OMTP wiring conventions as 3.5mm TRRS. It served as a mobile phone headset jack -- including on older Nokia handsets -- before 3.5mm became the universal smartphone headset size.
The RCA connector, introduced by RCA Corporation around 1937, is a de facto industry-standard connector for consumer audio and composite video -- there is no formal mechanical specification for the connector itself, though the composite video signal it typically carries targets a nominal 75-ohm impedance.
Specification Comparison Table
10 Parameters| Parameter / Spec | ||
|---|---|---|
|
Connector Family
|
Phone Jack (Micro-Mini) | Coaxial Phono Connector |
|
Conductors / Contacts
|
4 (Tip, Ring 1, Ring 2, Sleeve) | 2 (Center Pin, Outer Shield Ring) |
|
Signal Format
|
Stereo Audio + Microphone / Video | Unbalanced Line-Level Audio / Composite Video / S/PDIF |
|
Primary Applications
|
Pre-smartphone Nokia/mobile headsets, portable AV camcorder break-out | Home theater receivers, DJ turntables/mixers, composite/component video, S/PDIF digital |
|
Shaft / Plug Diameter
|
2.5 mm | — |
|
CTIA Standard Pinout
|
Tip: Left | Ring 1: Right | Ring 2: Ground | Sleeve: Mic | — |
|
OMTP Standard Pinout
|
Tip: Left | Ring 1: Right | Ring 2: Mic | Sleeve: Ground | — |
|
Outer Shell / Contact Diameter
|
— | 8.3–8.5 mm (Outer) | 3.175 mm (Center Pin) |
|
Standard Pinout
|
— | Center Pin: Positive Signal (+) | Outer Ring: Ground / Shield (-) |
|
Characteristic Impedance
|
— | 75 Ω (Video / S/PDIF) | ~50 Ω (Audio) |
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