Quick Answer / Summary: Working dimensions for a 3-pin XLR: panel cutout 24 mm D-size with two M2.5-M3 screws; body depth 25-30 mm behind the panel (combo 30-40 mm); cable OD range 3-7 mm depending on chuck; contact spacing within the insert fixed by the standard; overall plug length about 60-70 mm. Always confirm against the specific part’s drawing – suffixes change depth.
XLR dimensions are standardized enough to design around and variable enough to trip a build. The four numbers that matter are cutout, depth, cable OD and pin spacing. This guide gives the working values.
Panel Dimensions
The D-size cutout is 24 mm across with a flat edge that prevents rotation, held by two screws whose spacing depends on the series (commonly 19-24 mm apart, M2.5 or M3 thread). Depth behind the panel: 25-30 mm for a straight solder-cup socket, 30-40 mm for a combo, more for right-angle PCB parts. Design margins: add 5 mm of clearance around the body for the cable’s bend radius and 15 mm for service access. These four numbers – cutout, screw spacing, depth, clearance – define the panel more than any catalogue photo.
The Flat Edge
A plain 24 mm hole without the flat lets the socket rotate under plug torque, loosening the screws. Cut the D shape.
Screw Spacing Varies
Series differ by a few millimetres – enough to miss the holes. Drill from the datasheet drawing at 1:1.
Cable Fit
The chuck sets the cable OD range, typically 3-5 mm and 5-7 mm variants, with some parts covering 3-7 mm via interchangeable chucks. Below the range the chuck cannot close on the jacket; above it the boot will not fit. Cable OD is printed on quality cable and measurable with calipers. For a new cable batch, measure before ordering connectors – jacket diameters drift between suppliers even at the same nominal gauge.
Measure the Batch
Jacket OD varies by supplier and batch. One caliper reading per reel prevents a hundred unusable connectors.
Boot Clearance
The boot covers the chuck; a cable at the top of the range needs the larger boot or none at all.
Designing Around the Numbers
A practical design sequence: choose the mounting type, take cutout and depth from the drawing, add service clearance, then choose the cable and match the chuck. For dense panels, space sockets by at least 30 mm centre-to-centre so plugs and boots do not collide – the dimension that decides whether eight inputs fit on a 1U panel. For shallow enclosures, right-angle or PCB parts buy the depth back. Document the four numbers on the mechanical drawing; the build then matches the design without a bench experiment.
Density Math
At 30 mm centre-to-centre, a 19-inch panel fits about 14 sockets per row within the usable width – the number to check before promising a channel count.
Depth Recovery
Right-angle sockets and PCB parts recover 10-20 mm in shallow boxes. The alternative is a deeper enclosure – decide early.
XLR Dimensions
| Dimension | Value | Applies To |
|---|---|---|
| Panel cutout | 24 mm D-size | Panel sockets |
| Screw spacing | 19-24 mm | Series-dependent |
| Body depth | 25-30 mm | Straight solder-cup |
| Combo depth | 30-40 mm | Combo jacks |
| Cable OD | 3-7 mm | Chuck-dependent |
| Plug length | 60-70 mm | Cable connectors |
Real-World Application Scenarios
A 1U panel design fits eight sockets at 30 mm spacing, with depth checked against the enclosure’s 45 mm interior. A portable stage box uses right-angle sockets to stay under 40 mm deep. A cable order specifies the 5-7 mm chuck after measuring the batch’s 6.2 mm jacket.
Recommended Internal Resources
(1) Product cluster – https://zh-zong.com/productlist/ (anchor: XLR connectors by size and mounting); (2) FAQ – https://zh-zong.com/faq/ (anchor: dimension questions); (3) Contact – https://zh-zong.com/contact/ (anchor: request 1:1 drawings).
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Frequently Asked Questions (FAQ)
Q: What is the standard XLR panel cutout?
A: 24 mm D-size with a flat anti-rotation edge and two screw holes. Screw spacing varies by series – use the drawing.
Q: What cable diameter fits an XLR plug?
A: 3-7 mm depending on the chuck. Match the chuck to the jacket OD, measured with calipers.
Q: How many XLR sockets fit on 1U?
A: About 14 at 30 mm centre-to-centre within the usable panel width, assuming standard plug and boot clearance.