PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

77710Transformer,continuous Power,oph

Welch Allyn, Inc. · NSN 6540-01-232-0157 · FSC 6540 · No Item Name Available
Verified by PartsTable
NSN 6540-01-232-0157 — this item is cataloged by the U.S. Government under National Stock Number 6540-01-232-0157. Primary manufacturer part number: 77710.
Features
  • Transformer,continuous Power,oph — FSC 6540
  • General Characteristics Item Description: MOUNTS ON WALL OR CABINET; W/HANDLES FOR 3.5 HALOGEN OPHTHALMIC INSTRUMENTS; 110-130 V; 60 HZ V
  • 8 verified cross-references
  • Primary manufacturer: Welch Allyn, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Transformer,continuous Power,oph, cataloged under National Stock Number 6540-01-232-0157, is classified within Federal Supply Class 6540 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Welch Allyn, Inc.. Government technical data includes 1 verified specification, sourced from the Federal Logistics Information System (FLIS). This item has 8 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 12 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6540-01-232-0157
Primary Part Number77710
Item NameTransformer,continuous Power,oph
FSC / FSG6540 / 65 — No Item Name Available
ManufacturerWelch Allyn, Inc.
StatusACTIVE
General Characteristics Item DescriptionMOUNTS ON WALL OR CABINET; W/HANDLES FOR 3.5 HALOGEN OPHTHALMIC INSTRUMENTS; 110-130 V; 60 HZ V
Lifecycle & Compliance
Acquisition StatusACTIVE
Successor5340-01-680-0521 (74710)
HAZMATNo
Unit of IssueEA
Verified Substitutes 12
5340-01-680-052174710 SUCCESSOR
Button,plug
Stanley Black & Decker, Inc. Dba Stanley Hydraulic Tools Div Stanley Hydraulic Tools
2530-00-004-828774710 INTERCHANGEABLE
Nut,cap,dual Wheel Mounting
Crane Carrier Company, Llc
5365-00-014-200614347 INTERCHANGEABLE
Bushing,machine Thread
Eaton Aerospace Llc Dba Eaton Aerospace Jackson
4730-00-088-8666SAE J530 4-4-4 130425B INTERCHANGEABLE
Tee,pipe
Sae International Dba Sae International
3120-00-133-651676710 INTERCHANGEABLE
Bearing,plain,self-Aligning
Rbc Transport Dynamics Corp Div Rbc Transport Dynamics
3110-00-156-3548 INTERCHANGEABLE
Bearing,ball,annular
5840-00-166-018976710 INTERCHANGEABLE
Gearbox Assembly
L3harris Technologies, Inc Div Space & Airborne Systems
4720-00-177-067111662995 INTERCHANGEABLE
Hose,nonmetallic
U S Army Tank Automotive Command Amsta-Im-Mm
5120-00-308-3809GA143C INTERCHANGEABLE
Repair Tool,pneumatic Tire Valve
Idsc Holdings Llc Div Snap-on Industrial, a Div. of Idsc Holdings , Llc
5365-00-316-558877710 INTERCHANGEABLE
Ring,externally Threaded
Parker Hannifin Corporation Div Hydraulic Systems Division
Cross-Reference Index
Part NumberManufacturer
74710 Welch Allyn Holdings, Inc. (USA)
014347 General Medical Corp (USA)
76710 Welch Allyn, Inc. (USA)
76710 Welch Allyn Holdings, Inc. (USA)
77710 PRIMARY Welch Allyn, Inc. (USA)
14347 General Medical Corp (USA)
76710 Krasity's Medical & Surgical Supply, Inc. Dba Krasity's (USA)
999193905 American Purchasing Services, Llc Dba American Medical Depot Div D/b/a American Medical Depot (USA)
Related Parts
SUCCESSOR 5340-01-680-0521 Button,plug · 74710
2530-00-004-8287INTERCHANGEABLE
NUT,CAP,DUAL WHEEL MOUNTING
74710
5365-00-014-2006INTERCHANGEABLE
BUSHING,MACHINE THREAD
14347
4730-00-088-8666INTERCHANGEABLE
TEE,PIPE
SAE J530 4-4-4 130425B
3120-00-133-6516INTERCHANGEABLE
BEARING,PLAIN,SELF-ALIGNING
76710
3110-00-156-3548INTERCHANGEABLE
BEARING,BALL,ANNULAR
5840-00-166-0189INTERCHANGEABLE
GEARBOX ASSEMBLY
76710
4720-00-177-0671INTERCHANGEABLE
HOSE,NONMETALLIC
11662995
5120-00-308-3809INTERCHANGEABLE
REPAIR TOOL,PNEUMATIC TIRE VALVE
GA143C
5365-00-316-5588INTERCHANGEABLE
RING,EXTERNALLY THREADED
77710
5360-00-526-1665INTERCHANGEABLE
SPRING,HELICAL,EXTENSION
74710
5920-00-604-3387INTERCHANGEABLE
ARRESTER,LIGHTNING
14347

Frequently Asked Questions

What is NSN 6540-01-232-0157?

NSN 6540-01-232-0157 is a Transformer,continuous Power,oph, manufactured by Welch Allyn, Inc., classified under FSC 6540 (No Item Name Available). Status: active.

What are the part numbers for NSN 6540-01-232-0157?

NSN 6540-01-232-0157 has 8 cross-referenced part numbers: 74710 (Welch Allyn Holdings, Inc.), 014347 (General Medical Corp), 76710 (Welch Allyn, Inc.), 76710 (Welch Allyn Holdings, Inc.), 77710 (Welch Allyn, Inc.) and 3 more.

What NSN replaces 6540-01-232-0157?

There are 12 known substitutes for 6540-01-232-0157: 5340-01-680-0521, 2530-00-004-8287, 5365-00-014-2006 and 9 more. Verify interchangeability with system specifications before substitution.

What are the specifications of 77710?

Key specifications for 77710: Part Name Assigned by Controlling Agency: TRANSFRMR CONTIN PWR WALL/CAB W/HNDLS F/3.5V HALGN INSTR110/130V V; General Characteristics Item Description: MOUNTS ON WALL OR CABINET; W/HANDLES FOR 3.5 HALOGEN OPHTHALMIC INSTRUMENTS; 110-130 V; 60 HZ V. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com