Eaton SA399 Straight Blade Plug - UL 6221 02 Certified
Part Number: SA399
Quick Summary
The Eaton SA399 straight blade plug delivers reliable back-wire connections for industrial equipment wiring. In busy facilities, loose terminations and incompatible wiring methods can derail upgrades and create safety risks. This plug carries UL Federal Specification Classification 6221 02 and is built from impact‑resistant thermoplastic for durability in harsh environments. Engineered for seamless installation and long service life, it complements standard NEMA configurations and back-wire wiring, improving efficiency and reducing maintenance costs.
Product Information
Extended Description
SA399 Eaton: Eaton straight blade plug , #14 AWG, 15A, Industrial, 125V, Back wire, Black, Brass, Impact-resistant thermoplastic, 5-15P, Two-pole, three-wire, Screw, 0.33" in diameter, Thermoplastic, Core pack
Product Name
Eaton straight blade plug
Catalog Number
SA399
UPC
052757399203
Product Length/Depth
1.56 in
Product Height
1.08 in
Product Width
1.08 in
Product Weight
0.055 lb
Certifications
UL Federal Specification Classification 6221 02
Device type
Plug
Special features
Spring action
Type
Plug
Amperage Rating
15A
Voltage rating
125V
Contact material
Brass
Features
Spring action
Application
Industrial
Device grade
Standard grade
Wiring method
Back wire
Number of wires
3
Number Of Poles
Two-pole
Style type
Straight body
Cord range
0.33" in diameter
Material
Thermoplastic
Packaging type
Core pack
Color
Black
Connection type
Screw
Allowable wire size
#14 AWG
NEMA configuration
5-15P
Torque rating
14 lbf-inch
Design type
Straight blade
Face/body material
Impact-resistant thermoplastic
Receptacle type
Two-pole, three-wire
Residential Buyers Guide B-53
Commercial and residential straight blade vinyl receptacles
Eaton Specification Sheet - SA399
The 15A, 125V rating of the SA399 directly supports common industrial loads, enabling safe operation of equipment with standard 120V circuits and reducing the risk of overloads in everyday wiring scenarios. This translates to measurable efficiency gains during installation and lower field reworks when wiring tolerances are tight. The back-wire connection, paired with a robust screw termination, speeds up terminations while minimizing stray conductor exposure, which is especially valuable in high-traffic panels or restricted access installations. Brass contact material paired with a 14 lbf-inch torque rating provides secure, low-resistance connections that stay tight through vibration and thermal cycling common in manufacturing settings. The impact-resistant thermoplastic body resists impact damage and wear, extending service life in rugged environments, while the 0.33 inch cord diameter accommodates typical #14 AWG conductors for straightforward compatibility with existing cable assemblies. Tight dimensional tolerances and a standard NEMA 5-15P configuration enhance receptacle compatibility across a wide range of industrial devices, reducing compatibility issues during panel upgrades or retrofits. Finally, the core-pack packaging supports efficient stocking and material handling for procurement teams, aiding just-in-time assembly and minimizing waste in warehouse environments.
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FAQs
The SA399 supports back-wire termination with #14 AWG conductors, plus a screw connection option. This dual wiring compatibility speeds up terminations in control panels and ensures a secure, code-compliant connection even in tight spaces. The 14 lbf-inch torque rating helps ensure a consistent, tight fit without over-tightening that could damage conductors.
The SA399 is rated for 15A and 125V, with a NEMA 5-15P configuration and three wires (two-pole, three-wire). It uses brass contact material for reliable conductivity, a 0.33 inch cord-diameter allowance for #14 AWG wiring, and a temperature-stable thermoplastic body designed for industrial environments.
Yes. The SA399 features impact-resistant thermoplastic housing that resists deformation from impacts and daily wear, plus a secure brass contact system with defined torque. These elements reduce maintenance frequency and prolong service life in vibration-prone or harsh manufacturing settings.
The SA399 carries UL Federal Specification Classification 6221 02, indicating compliance with established federal standards for wiring devices. There are no CE, SIL, or IP certifications listed in the provided data, so planning should account for any site-specific regulatory requirements beyond UL 6221 02 when selecting products for global deployments.
By enabling quick back-wire terminations, reducing rework from loose connections, and providing durable construction that minimizes replacement cycles, the SA399 lowers labor costs and downtime. Its compatibility with standard #14 AWG wiring and common NEMA configurations simplifies stocking and retrofits, delivering predictable procurement and fast installation in ongoing automation projects.