The Transformer,audio Frequency, cataloged under National Stock Number 5950-00-857-3261, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Noreast Electronics Co Ltd. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 5950-00-857-3261 |
| Primary Part Number | R2500 |
| Item Name | Transformer,audio Frequency |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Noreast Electronics Co Ltd |
| Status | ACTIVE |
| Transformer Function | LINE |
| Inclosure Type | FULLY INCLOSED |
| Mounting Method | TERMINAL SINGLE GROUP |
| Body Width | 0.375 INCHES NOMINAL IN |
| Body Height | 0.437 INCHES NOMINAL IN |
| Maximum Transformer Power Rating | 50.0 MILLIWATTS SINGLE COMPONENT |
| Winding Function and Quantity | 1 PRIMARY AND 1 SECONDARY SINGLE COMPONENT |
| Impedance Rating in Ohms | 16.0 NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Impedance Rating in Ohms | 400.0 NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Body Length | 0.375 INCHES NOMINAL IN |
| Winding Operating Current | 7.0 MILLIAMPERES DC MAXIMUM SINGLE COMPONENT SINGLE PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 200.0 HERTZ MINIMUM AND 20.0 KILOHERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 4 WIRE LEAD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| R2500 | Noreast Electronics Co Ltd (CAN) |
| Reference | Meaning |
|---|---|
| SM-B-524780 | 3/2 Design control — primary reference U.S. Government activity |
NSN 5950-00-857-3261 is a Transformer,audio Frequency, manufactured by Noreast Electronics Co Ltd, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-00-857-3261 has 1 manufacturer part number on file: R2500 (Noreast Electronics Co Ltd).
1 possible match (shared part number, not a government interchangeability claim): 6630-01-616-7427. Verify interchangeability with system specifications before substitution.
Key specifications for R2500: Transformer Function: LINE; Inclosure Type: FULLY INCLOSED; Mounting Method: TERMINAL SINGLE GROUP; Body Width: 0.375 INCHES NOMINAL IN. 14 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.