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Audio Frequency Transformer

NSN: 5950-00-172-5040 | Model: 7125-2

A transformer which is designed so that part or all of its range of operating frequencies is 20 kilohertz (kilocycles) and below. The value may extend into the radio frequency range. It is generally used in the input, output, amplifier, or oscillator stages of audio and sonar devices.

NSN Properties and Flags
NATO Stock Number
Reliability Indicator
Not established
Mounting Hole Diameter
0.180 inches single group
Impedance Rating In Ohms
8.0 single component single secondary
Frequency Rating
100.0 hertz single component and 5.0 kilohertz single component
Winding Shielding Method
Internal shield brought out to terminal single component
Body Length
1.060 inches
Body Width
0.810 inches
Body Height
1.180 inches
Distance Between Mounting Facility Centers
1.750 inches single mounting facility single center group
Inclosure Type
Mounting Facility Quantity
2 single group
Mounting Method
Flange single group and unthreaded hole single group
Winding Function And Quantity
1 primary single component and 1 secondary single component
Terminal Type And Quantity
5 tab, solder lug
Recent Solicitations
Solicitation Return by Date Buyer Code Quantity
SPE7M518T875J 2018-08-20 PMCM4 17 EA
SPE7M518T623J 2018-06-18 PMCM4 4 EA
SPE7M518T558G 2018-06-04 PMCM4 1 EA
SPE7M018T9616 2018-06-04 PMCM2 3 EA
SPE7M518T357S 2018-04-16 PMCM4 1 EA
SPE7M518T108L 2018-02-26 PMCM4 1 EA
SPE7M517TQ464 2017-07-31 PMCM2 5 EA
SPE7MC15TC758 2015-07-02 PLCLX 7 EA

Inventory Check

The last inventory check on this NSN was done on 09/27/2021. Due to rapid changes in inventory this may not be the current stock qty.

  • Overhauled: 1
  • Serviceable: 1
  • New Surplus: 1
  • New: 1
  • As Removed: 1

Pricing and Availability

Send us a request for quote using the form below. Our team will contact you with an up to date pricing and availability quote ASAP.

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NSN 5950-00-172-5040 Datasheet

Supply Class (FSC):
Coils And Transformers
Cross Reference:
  • 7125-2
Cage Codes:
  • A. T. Parker, Inc. (CAGE 13222)
Schedule B & Trade:
  • Schedule B: 8548900100 (NAICS 335999)

    Electrical parts of machinery or apparatus not specified or included elsewhere in chapter 85

  • SITC: 77813

    Waste and scrap of primary cells, primary batteries and electric accumulators; spent primary cells, etc; electric parts of mach or apps, nes

  • End Use: 20005

    Electric apparatus


P - Indicates there is no information in the hmirs. The nsn is in a fsc in table ii of federal standard 313 and a msds may be required by the user. The requirement for a msds is dependent on a hazard determination of the supplier or the intended end use of item.


U - Precious metal content is unknown


- The item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application.

Freight Information:
  • NMFC:

    063420 - Transformers, noi, or transformer par

  • WCC:

    595 - Transformer, (machinery and parts),(less than 35 feet)

  • SHC:

    9 - Other or no special handling required (sh)

  • ADC:

    A - Shipment is not a consolidation and does not exceed 84 inches in any dimension.

  • ACC:

    H - Instruments/equipment/supplies for radio, communications, electrical, laboratory, etc. (includes signal corps)

  • LTL:

    W - Rating variable

  • TCC:

    Z - No special type of cargo code applicable

NSN Management Codes:
  • SOS
  • AAC
  • Quantity per pack
  • Unit of Measure
  • Shelf Life
  • Classification Control
  • Repariability
    This is a nonreparable item. if condemned or economically unserviceable, then dispose at the level authorized replace the item.

Questions & Answers:

What are the historical prices recorded for this stock number?
Historical data shows pricing from $1,506.92 to $2,511.54..
Does NSN 5950-00-172-5040 have a shelf life?
No. There is no shelf life applicable for this NSN.
What NATO entities are users of this NSN?
Department Of The Air Force, U.s. Marine Corps, Department Of The Navy, Brazil, Columbia, Singapore, Malaysia, and Republic Of Korea
What is the NIIN of NSN 5950-00-172-5040?
001725040 or 00-172-5040
Does NSN 5950-00-172-5040 require demilitarization?
Yes - ITAR Controlled
What is the most recent solicitation for NSN 5950-00-172-5040?
Solicitation SPE7M518T875J for qty 17 on 08/10/2018
When was this national stock number assigned to the federal catalog?
Sep 01, 1972