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Technical Data Sheet
PartsTable / COMPONENT / 2R681
2R681 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
Verify manufacturer and server generation compatibility Check if Option PN or Spare PN — same part, different channel
Confirm exact part number — similar PNs may be different parts
PRODUCT OVERVIEW

The TRANSFORMER,RADIO FREQUENCY is a the manufacturer industrial component. Key specifications include body_width: 1.438 INCHES NOMINAL IN, body_height: 1.000 INCHES NOMINAL IN, body_length: 1.500 INCHES NOMINAL IN, rating_method: WINDING TURNS SINGLE COMPONENT SINGLE PRIMARY, turn_quantity: 11-1/2 SINGLE COMPONENT SINGLE SECONDARY, coil_form_type: HOLLOW SINGLE COMPONENT. This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 5950-00-229-9800, indicating validated use in U.S.

government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels. Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
2R681
NSN: 5950-00-229-9800
FSC: 5950
CAGE: 20950 — ESPEY MFG AND ELECTRONICS CORP (USA)
SPECIFICATIONS
body_width1.438 INCHES NOMINAL IN
body_height1.000 INCHES NOMINAL IN
body_length1.500 INCHES NOMINAL IN
rating_methodWINDING TURNS SINGLE COMPONENT SINGLE PRIMARY
turn_quantity11-1/2 SINGLE COMPONENT SINGLE SECONDARY
coil_form_typeHOLLOW SINGLE COMPONENT
inclosure_typeOPEN
mounting_methodUNTHREADED HOLE(S) SINGLE GROUP
frequency_rating9.6 MEGAHERTZ MINIMUM AND 16.6 MEGAHERTZ MAXIMUM SINGLE COMPONENT
inductance_rating1.08 MICROHENRIES NOMINAL SINGLE COMPONENT SINGLE SECONDARY
reliability_indicatorNOT ESTABLISHED
mounting_hole_diameter0.128 INCHES NOMINAL SINGLE GROUP IN
NSN5950-00-229-9800
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available TRANSFORMER,RADIO FREQUENCY TITLE COMPONENT PN 2R681 MFR TRANSFORMER,RADIO FREQ
KEY FEATURES
•
TURN QUANTITY: 11-1/2 SINGLE COMPONENT SINGLE SECONDARY
•
WINDING FUNCTION AND QUANTITY: 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
•
MOUNTING HOLE DIAMETER: 0.128 INCHES NOMINAL SINGLE GROUP IN
•
RATING METHOD: WINDING TURNS AND ELECTRICAL SINGLE COMPONENT SINGLE SECONDARY
•
ADJUSTMENT METHOD AND QUANTITY: 1 ADJUSTABLE CORE SINGLE COMPONENT
•
TERMINAL TYPE AND QUANTITY: 4 TAB, SOLDER LUG
•
FREQUENCY RATING: 9.6 MEGAHERTZ MINIMUM AND 16.6 MEGAHERTZ MAXIMUM SINGLE COMPONENT
TECHNICAL CHARACTERISTICS (FLIS)
TURN QUANTITY11-1/2 SINGLE COMPONENT SINGLE SECONDARY
WINDING FUNCTION AND QUANTITY1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT
MOUNTING HOLE DIAMETER0.128 INCHES NOMINAL SINGLE GROUP IN
RATING METHODWINDING TURNS AND ELECTRICAL SINGLE COMPONENT SINGLE SECONDARY
TURN QUANTITY9 SINGLE COMPONENT SINGLE PRIMARY
ADJUSTMENT METHOD AND QUANTITY1 ADJUSTABLE CORE SINGLE COMPONENT
TERMINAL TYPE AND QUANTITY4 TAB, SOLDER LUG
FREQUENCY RATING9.6 MEGAHERTZ MINIMUM AND 16.6 MEGAHERTZ MAXIMUM SINGLE COMPONENT
BODY LENGTH1.500 INCHES NOMINAL IN
WINDING CONDUCTOR SIZE0.00397 INCHES AMERICAN WIRE GAGE SINGLE COMPONENT SINGLE PRIMARY IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 14
SM-B-369942Interchangeable
interchangeable cross-reference
interchangeable
2681Interchangeable
interchangeable cross-reference
interchangeable
919487Interchangeable
interchangeable cross-reference
interchangeable
1317258Interchangeable
interchangeable cross-reference
interchangeable
866099Interchangeable
interchangeable cross-reference
interchangeable
A2681Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusCANCELLED
Availability—
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is 2R681?
2R681 is a TRANSFORMER,RADIO FREQUENCY.
What parts can replace 2R681?
There are 14 known substitutes for 2R681: SM-B-369942, 2681, 919487 and 11 more. Substitute compatibility should be verified for your specific system.
Is 2R681 still available?
2R681 is currently cancelled.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026