MS27505E25B61PN

Product number MS27505E25B61PN

Series: Series I
Shell / insert: 25 / 61
Contact positions: 61 positions; 61×20
Material / finish: Aluminum alloy; olive drab cadmium over nickel base

Request Technical Review View MIL-DTL-38999 Series

Description

MS27505E25B61PN is a MIL-DTL-38999 Series I back-panel box-mount receptacle. The cited catalog lists shell size 25, insert arrangement 61, 61 positions (61×20), and p (crimp pin) termination with bayonet coupling. Confirm the mating half, key position and panel interface against the controlled drawing before ordering. For a cross-reference or compatible-supply review, send the mating code, drawing or clear product photo, quantity, and document requirements. Do not treat family-level catalog data as qualification or acceptance evidence for a supplied unit.

Configuration checklist

Match the full ordering code and insert face to the supplied drawing.
Confirm the mating half, contact gender, key position and coupling interface.
Check shell style, rear configuration, cable exit and any accessory interface.
Request the documents required for the offered unit; catalog values are not unit test results.

Technical Data

Ordering-code and insert data are catalog references. Electrical, environmental and mating-life values shown as catalog or family figures do not certify the supplied unit. Confirm the exact configuration and required evidence against its controlled drawing.

Series and shell style	MIL-DTL-38999 Series I; Rear box-mount receptacle
Coupling	Bayonet
Rear configuration / finish codes	E rear / B finish
Shell size / insert arrangement	25 / 61
Contact quantity and size mix	61 positions; 61×20
Contact type / termination	P (crimp pin)
Keying / option	N
Shell material and finish	Aluminum alloy; olive drab cadmium over nickel base
Insert service rating	I
Catalog withstand voltage at sea level	1800 V
Catalog withstand voltage at 21 km	1000 V
Catalog current rating by contact size	20: 7.5 A/contact
Catalog contact resistance by size	20: ≤5 mΩ
Catalog operating temperature	-65 to +175 °C
Catalog salt spray	500 h
Family catalog mating life	≥500 mating cycles (family catalog)
Family catalog insulation resistance	≥5000 MΩ normal; ≥100 MΩ humid (family, own pp.5/28)
Family catalog shell continuity	≤2.5 mΩ
Family catalog EMI shielding	≥85 dB (100 MHz–1 GHz); ≥50 dB (1–10 GHz) (family, own pp.5/28)
Catalog drawing reference	Own 2025 pp.16-18
Rear drawing callout (reference only)	Catalog drawing callout 1.4375-18; drawing reference only, not asserted as a rear-accessory interface. Confirm applicability against the controlled drawing.

Applications

These are selection and sourcing contexts for the listed catalog configuration. Suitability depends on the equipment interface, operating conditions and supplied-item documentation.

Panel-side harness interface selection for a Series I back-panel box-mount receptacleBayonet-coupled connector integration review at shell size 25BOM and mating-half review using the complete ordering code and controlled drawing

Buyer Q&A

What does MS27505E25B61PN identify?

The catalog identifies MS27505E25B61PN as a MIL-DTL-38999 Series I rear box-mount receptacle with shell size 25 and insert arrangement 61.

How many contacts are listed for MS27505E25B61PN?

The cited catalog lists 61 positions in insert 61 (61×20); termination code P (crimp pin) is shown. Verify the offered item drawing.

What should be checked when selecting MS27505E25B61PN?

Confirm the mating half, key position and panel interface against the controlled drawing before ordering. Confirm rear configuration and finish codes separately; family values are not test reports for an offered unit.

What information should an RFQ for MS27505E25B61PN include?

Send complete code MS27505E25B61PN, mating-half code, panel or cable details, quantity, controlled drawing/photo, and document requirements.