Eaton SA399O Straight Blade Plug - UL 6221-02
Part Number: SA399O
Quick Summary
Eaton straight blade plug SA399O provides a reliable, compact wiring connection for industrial equipment at 125V. This inline plug simplifies field wiring with a back-wire method, reducing mis-wiring and installation time. Clean, secure terminations matter in control panels and motors, and this device is designed to resist impact with a tough Thermoplastic body. UL Federal Specification Classification 6221 02 clearance and compliance ensure safety and consistent performance in harsh environments. For procurement teams, the standard core-pack packaging minimizes waste and speeds stocking. In addition to the primary 15A/125V rating, this plug supports compatible NEMA 5-15P configurations, offering a practical balance of performance and reliability for industrial wiring projects. This combination supports long service life in demanding settings.
Product Information
Extended Description
SA399O Eaton: Eaton straight blade plug , #14 AWG, 15A, Industrial, 125V, Back wire, Orange, 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
SA399O
UPC
052757399708
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
Orange
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 - SA399O
Paragraph 1: 15A at 125V capability keeps common industrial tools and machines within safe current and voltage limits, reducing overload risks. This plug aligns with standard NEMA 5-15P configurations, making it easy to source mating connectors and simplify panel wiring in mixed-gear environments. These features support reliable continuous operation in conveyors, robotics, and manufacturing cell equipment. The design also enables faster field replacement with minimal downtime, which is essential for production uptime. Paragraph 2: Back wire wiring method accelerates field terminations and minimizes bare conductor handling, shrinking installation time and improving wire retention under vibration. The screw connection option provides a dependable secure clamp on #14 AWG conductors, which is critical in portable equipment and control panels. This also reduces training time for technicians and lowers onboarding costs. Paragraph 3: Brass contact material delivers low resistance, enduring conductivity even under thermal cycling, while a 14 lbf-inch torque rating ensures consistent preloading without over-tightening. This combination supports reliable, repeatable performance in high-cycle industrial connections. The design also ensures contact seating remains stable across mating cycles. Paragraph 4: Impact-resistant thermoplastic face and body resist impacts and heat, extending life in workshop and production-floor settings. Orange color aids quick identification in multi-channel harnesses, reducing mis-wiring risk during maintenance and reconfiguration. The orange housing also supports safer, faster maintenance in dim or crowded installations. Paragraph 5: Core-pack packaging and standard product design streamline procurement and stocking, while spring-action features simplify mating and provide tactile feedback during installation. Together these attributes translate into faster commissioning, lower service costs, and improved overall safety in wiring devices. Additional benefits include compatibility with dense wiring layouts and easier code-compliant installations.
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FAQs
SA399O supports back-wire terminations with a secure screw clamp for #14 AWG conductors. This wiring method reduces mis-wiring, limits conductor handling errors, and speeds commissioning in control panels, conveyors, and industrial machines. Technicians benefit from tactile feedback during tightening and predictable performance across multiple mating cycles, which lowers installation risk in demanding production environments.
SA399O carries UL Federal Specification Classification 6221 02, a robust safety certification for industrial plug components. This designation reinforces compliance with stringent reliability and performance standards, supporting inspection-ready installations in factory floors and automated lines. By meeting UL criteria, procurement teams can reduce risk when qualifying wiring devices for critical equipment and maintain consistent supplier documentation.
Yes, SA399O is designed for #14 AWG conductors and uses a 14 lbf-in torque rating to ensure proper clamping without over-tightening. The back-wire screw clamp delivers secure connections with repeatable electrical contact, helping maintain voltage integrity under vibration and temperature changes common in manufacturing environments.
Typical applications include control panels, motors, conveyors, and other industrial equipment that use a NEMA 5-15P mating configuration. The orange, impact‑resistant thermoplastic body improves visibility in harnesses and reduces mis-wiring during maintenance. Its compact form also fits tight panel spaces and simplifies stocking alongside other Eaton wiring devices.
Maintenance costs drop thanks to a durable brass contact system, spring-action features, and a reliable back-wire termination that stays secure through vibration. The 15A/125V rating reduces nuisance outages, while core-pack packaging supports lean inventory and faster changeouts. Over the equipment lifecycle, these factors translate to lower downtime, fewer field calls, and a favorable return on investment.