D38999/26MJ24HB-LC vs D38999/20WH55SE-LC
| Part Number |
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| Category | Circular Connectors - Housings | Circular Connectors - Housings |
| Manufacturer | TE Connectivity Deutsch Connectors | TE Connectivity Deutsch Connectors |
| Description | CONN PLUG HSNG MALE 24POS INLINE | CONN RCPT HSG FMALE 55POS PNL MT |
| Package | - | - |
| Series | Military, MIL-DTL-38999 Series III, ACT | Military, MIL-DTL-38999 Series III, DTS |
| Type | For Male Pins | For Female Sockets |
| Features | Coupling Nut | - |
| Mounting Type | Free Hanging (In-Line) | Panel Mount |
| Ingress Protection | Environment Resistant | Environment Resistant |
| Orientation | B | E |
| Number of Positions | 24 | 55 |
| Connector Type | Plug Housing | Receptacle Housing |
| Shielding | Shielded | Shielded |
| Contact Type | Crimp | Crimp |
| Shell Size - Insert | 25-24 | 23-55 |
| Fastening Type | Threaded | Threaded |
| Shell Size, MIL | J | H |
| Contact Size | 12 (12), 16 (12) | 20 |
| Shell Material | Composite | Aluminum Alloy |
| Housing Color | Silver | Olive Drab |
| Shell Finish | Electroless Nickel | Chromate over Cadmium |
| Mounting Feature | - | Flange |
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1. Does the circular connector housing support waterproof function?
Yes, many circular connector housings have waterproof features, especially IP67 or IP68 rated housings, suitable for use in humid or outdoor environments.
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2. How can circular connector housings improve the durability of connectors?
The shell can significantly extend the service life of the connector in harsh environments by providing protective measures such as mechanical strength, dust prevention, and waterproofing.
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3. 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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4. What are the standard dimensions for circular connector housings?
The size of the casing usually depends on the type of connector and the application environment, with multiple diameters, lengths, and shapes to choose from. Typical sizes include M12, M16, M23, and so on.

