PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

FR30SN0-187Relay,thermal

Relay Specialties Inc · NSN 5945-00-350-1998 · FSC 5945 · No Item Name Available
Verified by PartsTable
NSN 5945-00-350-1998 — this item is cataloged by the U.S. Government under National Stock Number 5945-00-350-1998. Primary manufacturer part number: FR30SN0-187.
Features
  • Relay,thermal — FSC 5945
  • Heater Voltage Rating in Volts: 187.0
  • Heater Power Rating in Watts: 4.0
  • Contact Maximum Current Rating in Amps: 6.0 AC
  • Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN
  • Delay Time in Seconds: 30.0 FIXED OPERATE NOMINAL
  • Contact Maximum Voltage Rating in Volts: 187.0 AC
  • Mounting Facility Type and Quantity: 2 UNTHREADED HOLE(S)
Applications
  • Circuit control and protection
  • Equipment power management
  • Signal routing
General Description

The Relay,thermal, cataloged under National Stock Number 5945-00-350-1998, is classified within Federal Supply Class 5945 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is Relay Specialties Inc. Government technical data includes 7 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 3 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 3 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active.

Technical Specifications
ParameterValue
NSN5945-00-350-1998
Primary Part NumberFR30SN0-187
Item NameRelay,thermal
FSC / FSG5945 / 59 — No Item Name Available
ManufacturerRelay Specialties Inc
StatusACTIVE
Heater Voltage Rating in Volts187.0
Heater Power Rating in Watts4.0
Contact Maximum Current Rating in Amps6.0 AC
Contact ArrangementSINGLE POLE, SINGLE THROW, NORMALLY OPEN
Delay Time in Seconds30.0 FIXED OPERATE NOMINAL
Contact Maximum Voltage Rating in Volts187.0 AC
Mounting Facility Type and Quantity2 UNTHREADED HOLE(S)
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Verified Substitutes 3
3110-00-151-8636 INTERCHANGEABLE
Cone and Rollers,tapered Roller
5995-00-812-0797 INTERCHANGEABLE
Cable Assembly,power,electrical
5330-01-406-12506743928 INTERCHANGEABLE
Seal,plain Encased
Naval Sea Systems Command
Cross-Reference Index
Part NumberManufacturer
FR30SN0-187 PRIMARY Relay Specialties Inc (USA)
C2850-2863-4 Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters (USA)
55039-7 Keco Industries, Inc. (USA)
Related Parts
3110-00-151-8636INTERCHANGEABLE
CONE AND ROLLERS,TAPERED ROLLER
5995-00-812-0797INTERCHANGEABLE
CABLE ASSEMBLY,POWER,ELECTRICAL
5330-01-406-1250INTERCHANGEABLE
SEAL,PLAIN ENCASED
6743928

Frequently Asked Questions

What is NSN 5945-00-350-1998?

NSN 5945-00-350-1998 is a Relay,thermal, manufactured by Relay Specialties Inc, classified under FSC 5945 (No Item Name Available). Status: active.

What are the part numbers for NSN 5945-00-350-1998?

NSN 5945-00-350-1998 has 3 cross-referenced part numbers: FR30SN0-187 (Relay Specialties Inc), C2850-2863-4 (Trane U.s. Inc. Dba the Trane Co Div Trane Headquarters), 55039-7 (Keco Industries, Inc.).

What NSN replaces 5945-00-350-1998?

There are 3 known substitutes for 5945-00-350-1998: 3110-00-151-8636, 5995-00-812-0797, 5330-01-406-1250. Verify interchangeability with system specifications before substitution.

What are the specifications of FR30SN0-187?

Key specifications for FR30SN0-187: Heater Voltage Rating in Volts: 187.0; Heater Power Rating in Watts: 4.0; Contact Maximum Current Rating in Amps: 6.0 AC; Contact Arrangement: SINGLE POLE, SINGLE THROW, NORMALLY OPEN. 10 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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