D38999/26MJ43JN-LC vs D38999/20FJ24AE
| 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 HSG FMALE 43POS INLINE | CONN RCPT HSNG MALE 24POS PNL MT |
| Package | - | - |
| Series | Military, MIL-DTL-38999 Series III, ACT | Military, MIL-DTL-38999 Series III, DTS |
| Type | For Female Sockets | For Male Pins |
| Features | Coupling Nut | - |
| Mounting Type | Free Hanging (In-Line) | Panel Mount |
| Ingress Protection | Environment Resistant | Environment Resistant |
| Orientation | N (Normal) | E |
| Number of Positions | 43 | 24 |
| Connector Type | Plug Housing | Receptacle Housing |
| Shielding | Shielded | Shielded |
| Contact Type | Crimp | Crimp |
| Shell Size - Insert | 25-43 | 25-24 |
| Fastening Type | Threaded | Threaded |
| Shell Size, MIL | J | J |
| Contact Size | 16 (20), 20 (23) | 12 (12), 16 (12) |
| Shell Material | Composite | Aluminum Alloy |
| Housing Color | Silver | Silver |
| Shell Finish | Electroless Nickel | Electroless Nickel |
| 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. 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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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. How does the circular connector housing ensure the mechanical stress release of the cable?
The casing is usually equipped with cable clamps or stress relief devices, which firmly fix the cable to prevent mechanical stress caused by pulling or bending from being transmitted to the electrical connection part of the connector, thereby extending the life of the connector.

