D38999/20MB99JC-LC vs D38999/24WD18PB-LC
| Part Number |
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| Category | Circular Connectors - Housings | Circular Connectors - Housings |
| Manufacturer | Amphenol Aerospace Operations | TE Connectivity Deutsch Connectors |
| Description | CONN RCPT HSNG FMALE 7POS PNL MT | CONN RCPT HSNG MALE 18POS PNL MT |
| Package | - | - |
| Series | Military, MIL-DTL-38999 Series III, Tri-Start? TV | Military, MIL-DTL-38999 Series III, DTS |
| Type | For Female Sockets | For Male Pins |
| Mounting Type | Panel Mount | Panel Mount |
| Ingress Protection | Environment Resistant | Environment Resistant |
| Orientation | C | B |
| Number of Positions | 7 | 18 |
| Mounting Feature | Flange | Bulkhead - Front Side Nut |
| Connector Type | Receptacle Housing | Receptacle Housing |
| Shielding | Shielded | Shielded |
| Contact Type | Crimp | Crimp |
| Shell Size - Insert | 11-99 | 15-18 |
| Fastening Type | Threaded | Threaded |
| Shell Size, MIL | B | D |
| Contact Size | 20 | 20 |
| Shell Material | Composite | Aluminum Alloy |
| Housing Color | Silver | Olive Drab |
| Shell Finish | Electroless Nickel | Chromate over Cadmium |
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1. Does the circular connector housing have shielding function?
Some metal casings provide electromagnetic shielding (EMI/RFI) for high-frequency signal transmission applications to prevent electromagnetic interference.
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2. What is the temperature range of the circular connector housing?
The operating temperature range of the casing depends on the material used. Metal casings typically operate within the range of -55 ° C to+125 ° C, while plastic casings may be suitable for lower temperature ranges.
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3. What is a quick disconnect housing?
Quick disconnect housing is a type of housing designed for quick connection and disconnection, typically used in applications that require frequent plugging or quick maintenance, such as military, aviation, and industrial automation fields.
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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.

