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SR21 ✓ Verified by PartsTable
— · COMPONENT
WHAT YOU NEED TO KNOW
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PRODUCT OVERVIEW

The SEMICONDUCTOR DEVICE,DIODE is a the manufacturer industrial component. Key specifications include material: SILICON SEMICONDUCTOR, bulb_type: PLAIN RIGID, case_type: DUSTPROOF, bulb_style: PLAIN BULB W/BENDABLE EXTENSION, scale_type: CONCENTRIC DIAL, case_diameter: 2.234 INCHES NOMINAL IN. This product is currently in active production with full OEM support.

This part is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-524-9210, indicating validated use in U.S. government and defense logistics supply chains. Available through authorized enterprise resellers and TPM (Third Party Maintenance) channels.

Verify compatibility with your specific system configuration before ordering.

WHERE IT FITS
SR21
NSN: 6685-00-524-9210
FSC: 6685
CAGE: 03479 — ENOVATION CONTROLS LLC (USA)
SPECIFICATIONS
materialSILICON SEMICONDUCTOR
bulb_typePLAIN RIGID
case_typeDUSTPROOF
bulb_stylePLAIN BULB W/BENDABLE EXTENSION
scale_typeCONCENTRIC DIAL
bulb_quantity1
case_diameter2.234 INCHES NOMINAL IN
dial_diameter2.000 INCHES NOMINAL IN
overall_length1.103 INCHES MAXIMUM IN
bulb_tip_length1.500 INCHES NOMINAL IN
mounting_methodTHREADED STUD(S)
actuating_mediumVAPOR TENSION
NSN6685-00-524-9210
COMPONENT DIAGRAM
COMPONENT MAIN IC EDGE CONNECTOR No detailed specs available SEMICONDUCTOR DEVICE,DIODE TITLE COMPONENT PN SR21 MFR SEMICONDUCTOR DEVICE,D
KEY FEATURES
•
BULB TIP LENGTH: 1.500 INCHES NOMINAL IN
•
FLEXIBLE TUBE LENGTH: 35.000 INCHES NOMINAL IN
•
SCALE MEASUREMENT RANGE: +100.000 TO 250.000 DEG FAHRENHEIT
•
ACTIVE PORTION DIAMETER: 0.344 INCHES NOMINAL IN
•
SCALE TYPE: CONCENTRIC DIAL
•
MATERIAL: STEEL METER CASE
•
STYLE DESIGNATOR: BULB W/O SOCKET
TECHNICAL CHARACTERISTICS (FLIS)
BULB TIP LENGTH1.500 INCHES NOMINAL IN
FLEXIBLE TUBE LENGTH35.000 INCHES NOMINAL IN
SCALE MEASUREMENT RANGE+100.000 TO 250.000 DEG FAHRENHEIT
SPECIAL FEATURESALARM CONTACT SET AT 200.0 DEG RISING TEMP
ACTIVE PORTION DIAMETER0.344 INCHES NOMINAL IN
SCALE TYPECONCENTRIC DIAL
MATERIALSTEEL METER CASE
STYLE DESIGNATORBULB W/O SOCKET
MATERIALCOPPER BULB
ACTIVE PORTION LENGTH1.500 INCHES NOMINAL IN
VERIFIED SUBSTITUTES & CROSS-REFERENCES 24
5P2-1Interchangeable
interchangeable cross-reference
interchangeable
PE28010003F27Interchangeable
interchangeable cross-reference
interchangeable
107B8224-1Interchangeable
interchangeable cross-reference
interchangeable
53681ASInterchangeable
interchangeable cross-reference
interchangeable
53681-00Interchangeable
interchangeable cross-reference
interchangeable
56AZ130Interchangeable
interchangeable cross-reference
interchangeable
LIFECYCLE
StatusACTIVE
AvailabilityOEM and secondary market
RoHS CompliantEAR99Not HAZMAT
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FREQUENTLY ASKED QUESTIONS
What is SR21?
SR21 is a SEMICONDUCTOR DEVICE,DIODE.
What parts can replace SR21?
There are 24 known substitutes for SR21: 5P2-1, PE28010003F27, 107B8224-1 and 21 more. Substitute compatibility should be verified for your specific system.
What is the NSN for SR21?
SR21 is cataloged in the Federal Logistics Information System (FLIS) under NSN 6685-00-524-9210. This indicates validated use in U.S. government and defense supply chains.
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✓ Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
PartsTable Design LLC · partstable.com
Last verified: July 2026