The Transformer,current, cataloged under National Stock Number 5950-01-293-9124, is classified within Federal Supply Class 5950 (Coils and Transformers) of the Electrical and Electronic Equipment Components group. The manufacturer of record is Instrument Transformers Inc. Government technical data includes 16 specifications, cited from the U.S. Government catalog. The record lists 2 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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 | 5950-01-293-9124 |
| Primary Part Number | 58RBL-301 |
| Item Name | Transformer,current |
| FSC / FSG | 5950 / 59 — Coils and Transformers |
| Manufacturer | Instrument Transformers Inc |
| Status | ACTIVE |
| Mounting Facility Quantity | 2 SINGLE GROUP |
| Inclosure Type | FULLY INCLOSED |
| Input-Output Phase Relationship | SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT |
| Mounting Method | SLOT SINGLE GROUP |
| Body Width | 1.380 INCHES NOMINAL IN |
| Body Height | 3.620 INCHES NOMINAL IN |
| Maximum Transformer Power Rating | 25.0 VOLT-AMPERE SINGLE COMPONENT |
| Winding Function and Quantity | 1 SECONDARY SINGLE COMPONENT |
| Distance Between Mounting Facility Centers | 3.940 INCHES NOMINAL SINGLE MOUNTING FACILITY SINGLE CENTER GROUP IN |
| Body Length | 4.630 INCHES NOMINAL IN |
| Winding Operating Current | 5.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE SECONDARY |
| Winding Operating Current | 300.0 AMPERES AC NOMINAL SINGLE COMPONENT SINGLE PRIMARY |
| Reliability Indicator | NOT ESTABLISHED |
| Frequency Rating | 50.0 HERTZ MINIMUM AND 400.0 HERTZ MAXIMUM SINGLE COMPONENT |
| Terminal Type and Quantity | 2 WIRE LEAD |
| Mounting Slot Width | 0.310 INCHES NOMINAL SINGLE GROUP IN |
| 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 |
|---|---|
| 106.987-1 | Ward Leonard Ct Llc (USA) |
| 58RBL-301 PRIMARY | Instrument Transformers Inc (USA) |
| Reference | Meaning |
|---|---|
| 58RBT-301 | C/1 Advisory reference — outside the item-of-supply concept Instrument Transformers Inc |
| 58R8T-301 | C/1 Advisory reference — outside the item-of-supply concept Instrument Transformers Inc |
NSN 5950-01-293-9124 is a Transformer,current, manufactured by Instrument Transformers Inc, classified under FSC 5950, Coils and Transformers. Status: active.
NSN 5950-01-293-9124 has 2 manufacturer part numbers on file: 106.987-1 (Ward Leonard Ct Llc), 58RBL-301 (Instrument Transformers Inc).
1 possible match (shared part number, not a government interchangeability claim): 4320-01-426-2350. Verify interchangeability with system specifications before substitution.
Key specifications for 58RBL-301: Mounting Facility Quantity: 2 SINGLE GROUP; Inclosure Type: FULLY INCLOSED; Input-Output Phase Relationship: SINGLE PHASE TO SINGLE PHASE SINGLE COMPONENT; Mounting Method: SLOT SINGLE GROUP. 16 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.