JTPQ00RT-10-99P-LC vs D38999/20MG35HD-LC
| Part Number |
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| Category | Circular Connectors - Housings | Circular Connectors - Housings |
| Manufacturer | Amphenol Aerospace Operations | Amphenol Aerospace Operations |
| Description | CONN RCPT HSNG MALE 7POS PNL MT | CONN RCPT HSNG MALE 79POS PNL MT |
| Package | - | - |
| Series | MIL-DTL-38999 Series II, JT | Military, MIL-DTL-38999 Series III, Tri-Start? TV |
| Type | For Male Pins | For Male Pins |
| Mounting Type | Panel Mount | Panel Mount |
| Ingress Protection | Environment Resistant | Environment Resistant |
| Orientation | N (Normal) | D |
| Number of Positions | 7 | 79 |
| Mounting Feature | Flange | Flange |
| Connector Type | Receptacle Housing | Receptacle Housing |
| Shielding | Unshielded | Shielded |
| Contact Type | Crimp | Crimp |
| Shell Size - Insert | 10-99 | 21-35 |
| Fastening Type | Bayonet Lock | Threaded |
| Contact Size | 20 | 22D |
| Shell Material | Aluminum Alloy | Composite |
| Shell Finish | Cadmium over Nickel | Electroless Nickel |
| Shell Size, MIL | - | G |
| Housing Color | - | Silver |
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1. What are the common materials for circular connector housings?
Common shell materials include metal (such as aluminum, stainless steel) and plastic. Metal casings typically have better shielding and corrosion resistance, while plastic casings are lightweight and suitable for applications that do not require shielding.
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2. What are the advantages of circular connector housings in outdoor applications?
The shell provides protection level, weather resistance, and corrosion resistance, ensuring that the connector operates stably for a long time in humid, extreme temperature, and outdoor environments.
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3. Which applications require high shielding performance enclosures?
High shielding performance enclosures are mainly used for applications that prevent electromagnetic interference, such as communication equipment, radar systems, industrial control systems, and medical equipment.
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4. What are the advantages of plastic shells compared to metal shells?
The plastic casing is lightweight, cost-effective, corrosion-resistant, and suitable for low-power applications and indoor environments. The metal casing provides better strength, impact resistance, and shielding performance.

