Description
Key Technical Specifications
- Product Type: Dust Cap (Plastic)
- Compatible Shell Size: ER 14S
- Attachment Method: Threaded
- Material: Plastic
- Standard: MIL-SPEC (MS90376 Series)
- Environmental Protection: Dust & Moisture Resistance
- Color: Typically Black or Olive Drab
- Weight: < 0.1 lbs
- RoHS Compliant: Yes (Modern Replacements)
- Manufacturer: Amphenol (Common Mfr for GE/MS Spec)
Product Introduction
You’ve got a spare connector port on a control panel, and leaving it open is just asking for trouble. Moisture, metal shavings, or just plain dust will eventually corrode those pins, and suddenly you’re chasing a ghost fault in a 20-year-old GE control system. The GE MS90376-12Y is the simple, cheap insurance policy for that exact scenario. It’s a threaded plastic dust cap designed specifically for ER 14S shell size connectors, snapping onto the threads to seal out the environment.
Why worry about a 2 cap? Because replacing a corroded connector on a legacy GE panel can turn into a 500 headache and a weekend of rewiring. The GE MS90376-12Y is a MIL-SPEC part, meaning it’s built to survive industrial environments without cracking or degrading like cheap aftermarket plastic. Bottom line—cap your unused ports. It’s the lowest-cost, highest-ROI maintenance action you can take on any aging control cabinet.
Troubleshooting Quick Reference
- Cap Won’t Thread On | Cross-threading or wrong shell size | 90% chance you’re forcing it | Stop. Verify shell size is ER 14S | Align threads carefully; do not force
- Cap Cracks During Installation | Brittle plastic or cold weather | 80% chance the cap is old/dry-rotted | Inspect for hairline cracks before install | Replace with new MS90376-12Y; store spares in climate-controlled area
- Connector Still Corroded Under Cap | Missing O-ring or damaged seal | 70% chance the sealing surface is compromised | Inspect connector face and cap interior | Clean contacts; replace cap if seal is damaged
- Cap Lost / Missing | Maintenance oversight | 100% chance it’s gone | Check spare parts bin | Order MS90376-12Y in bulk; cap all unused ports immediately
Application Scenarios & Pain Points
- Legacy GE Control Panels: Protecting spare I/O connector ports on 20+ year old GE Fanuc or Series 90 panels. The MS90376-12Y prevents oxidation on unused pins, saving future troubleshooting time.
- Marine & Offshore Platforms: High humidity and salt spray environments where every open connector is a corrosion risk. The MIL-SPEC plastic of the MS90376-12Y resists UV and salt degradation better than standard caps.
- Mining & Aggregate Plants: Extreme dust environments where conductive dust can bridge connector pins. The threaded seal of the provides a positive barrier against particulate ingress.
GE MS90376-12Y
Compatible Replacement Models
- ✅ Drop-in Replacement: . Exact same part. Same threads, same fit. Cost: ~$2-5 each in bulk.
- ⚠️ Software Compatible: MS90376-14Y. Slightly different shell size (ER 14 vs ER 14S). Warning: Verify shell size before ordering. The MS90376-14Y will NOT thread onto an ER 14S connector. Check your connector shell marking.
- ❌ Hardware Incompatible: MS90376-10Y (ER 12 Shell). Too small. Will not fit ER 14S connectors. Also incompatible: Generic “universal” dust caps with push-on fittings. Your GE connectors use threaded shells; push-on caps will fall off in vibration.
