How to Choose the Right Plastic Enclosure (7 Steps)

August 27, 2025

TL;DR: Pick your environment, pick your material, and size it to your PCB + I/O.

1) Define the operating environment

Start with where your device lives: desk, vehicle cabin, factory floor, or outdoors. Temperature swings, vibration, UV exposure, splash/dust, and cleaning chemicals all influence enclosure choice and gasketing. Indoor prototypes tolerate simpler specs; industrial/outdoor devices often need venting, strain relief, and robust mounts.

2) Choose a material that matches the job

ABS: Versatile, easy to machine, great for handhelds and general electronics.
Polycarbonate (PC): Higher impact resistance; good where durability matters.
ASA/UV-stable options: Better weatherability for outdoor use.
If you’re unsure, start with ABS for prototyping, then step up to PC or UV-stable blends for fielded units.

3) Size for your PCB—and your connectors

Map board outline, tallest components, standoffs, and cable bend radii. Leave margin for fasteners and labeling. If you’ll rotate a USB-C or RJ45 to an edge, confirm connector depth and boot clearance now to avoid late rework.

4) Plan the I/O (cutouts, vents, and mounting)

List every hole you need: power, data, LEDs, buttons, antenna pass-throughs, vents, and wall/pole/rail mounting. Group related ports on one face to simplify harnessing and reduce assembly time. If heat is a concern, plan vent patterns or internal heat spreaders.

5) Think branding early (logos, graphics, and text)

A clean label area, embossed/debossed logos, or printed graphics can turn a “box” into a product. Decide placements and sizes now so your team won’t revisit mechanicals just to fit a mark or serial.

6) Sanity-check compliance cues

Flammability: Know your target (e.g., UL 94 HB/V-2/V-0) and choose material/geometry accordingly.
Ingress: If you expect splash/dust, plan for gaskets and fastener patterns that maintain compression.
RoHS/REACH: Ensure material declarations are on file before procurement.

7) Prototype fast—then lock it in

Don’t over-engineer the first pass. Get a test enclosure in hand, validate connector fit, cable strain relief, and thermal behavior, then finalize your model notes (cutouts, graphics, text) for production.

New Age Enclosures supplies standard stock enclosures through Authorized New Age Enclosures Distributors. Cutouts, printing, and other secondary operations must be sourced from a qualified third party.