PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

LRD22Protector,thermal-Overload,elect

Square D Co · NSN 6110-01-550-6637 · FSC 6110 · No Item Name Available
Verified by PartsTable
NSN 6110-01-550-6637 — this item is cataloged by the U.S. Government under National Stock Number 6110-01-550-6637. Primary manufacturer part number: LRD22.
Features
  • Protector,thermal-Overload,elect — FSC 6110
  • 5 verified cross-references
  • Primary manufacturer: Square D Co
Applications
  • Electrical power distribution
  • Generator and power systems
  • Industrial motor installations
General Description

The Protector,thermal-Overload,elect, cataloged under National Stock Number 6110-01-550-6637, is classified within Federal Supply Class 6110 (No Item Name Available) of the Electric Wire, Power, and Distribution Equipment group. The primary manufacturer of record is Square D Co. This item has 5 commercial cross-references from 5 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: EA.

Technical Specifications
ParameterValue
NSN6110-01-550-6637
Primary Part NumberLRD22
Item NameProtector,thermal-Overload,elect
FSC / FSG6110 / 61 — No Item Name Available
ManufacturerSquare D Co
StatusACTIVE
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueEA
Verified Substitutes 9
5905-00-045-6918757-6216 INTERCHANGEABLE
Resistor,variable,nonwire Wound,
Sensor Systems, L.l.c. Dba Sensor Systems Llc
5945-00-113-0317 INTERCHANGEABLE
Relay,electromagnetic
3750-00-239-86781945100 INTERCHANGEABLE
Cutter,weed,whip
Ames True Temper, Inc. Dba Ames True Temper
5940-00-495-1119 INTERCHANGEABLE
Terminal,stud
5940-01-039-6587 INTERCHANGEABLE
Terminal,feedthru
2915-01-041-448160957 INTERCHANGEABLE
Proportioner,fuel Pump
Eaton Corporation Dba Airframe Div Fuel & Motion Control Systems
5310-01-246-509060802 INTERCHANGEABLE
Washer,spring Tension
Thomas and Betts Corp Electronics Group
4820-01-357-9669 INTERCHANGEABLE
Valve,regulating,fluid Pressure
5945-01-367-0547581501-005 INTERCHANGEABLE
Relay,electromagnetic
Pacific Consolidated Industries Llc
Cross-Reference Index
Part NumberManufacturer
HSA005644 Nqea Marine Safety Pty Ltd (AUS)
60802 Drs Environmental Systems Inc (USA)
60802 Hdt Expeditionary Systems Inc (USA)
LRD22 PRIMARY Square D Co (USA)
60802 Engineered Air Systems, Inc. Dba Drs Sustainment Systems (USA)
Related Parts
5905-00-045-6918INTERCHANGEABLE
RESISTOR,VARIABLE,NONWIRE WOUND,
757-6216
5945-00-113-0317INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
3750-00-239-8678INTERCHANGEABLE
CUTTER,WEED,WHIP
1945100
5940-00-495-1119INTERCHANGEABLE
TERMINAL,STUD
5940-01-039-6587INTERCHANGEABLE
TERMINAL,FEEDTHRU
2915-01-041-4481INTERCHANGEABLE
PROPORTIONER,FUEL PUMP
60957
5310-01-246-5090INTERCHANGEABLE
WASHER,SPRING TENSION
60802
4820-01-357-9669INTERCHANGEABLE
VALVE,REGULATING,FLUID PRESSURE
5945-01-367-0547INTERCHANGEABLE
RELAY,ELECTROMAGNETIC
581501-005

Frequently Asked Questions

What is NSN 6110-01-550-6637?

NSN 6110-01-550-6637 is a Protector,thermal-Overload,elect, manufactured by Square D Co, classified under FSC 6110 (No Item Name Available). Status: active.

What are the part numbers for NSN 6110-01-550-6637?

NSN 6110-01-550-6637 has 5 cross-referenced part numbers: HSA005644 (Nqea Marine Safety Pty Ltd), 60802 (Drs Environmental Systems Inc), 60802 (Hdt Expeditionary Systems Inc), LRD22 (Square D Co), 60802 (Engineered Air Systems, Inc. Dba Drs Sustainment Systems).

What NSN replaces 6110-01-550-6637?

There are 9 known substitutes for 6110-01-550-6637: 5905-00-045-6918, 5945-00-113-0317, 3750-00-239-8678 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of LRD22?

Key specifications for LRD22: End Item Identification: 4520-01-477-0568; HEATER,DUCT TYPE,PORTABLE; Special Features: CLASS 10 WITH SINGLE PHASE SENSITIVITY. 2 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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