Overview
The Square D 9065 TD 8 thermal overload relay provides precise motor protection for mid-range three-phase applications. Built on Schneider Electric’s Motor Logic (Class 9065) platform, this solid-state relay combines temperature-stable performance with fast trip response, making it a dependable choice for HVAC systems, pumps, conveyors, and other industrial motor loads. New in Box condition ensures factory-fresh reliability.
Key Features
- Adjustable current range: 8–11.5 A adapts neatly to a variety of three-phase motor loads
- Solid-state accuracy: ±2 % trip repeatability with temperature-stable performance and quick response time
- Phase-loss and unbalance protection: Trips in roughly 3 seconds at 25 % imbalance or more, shielding your motor from dangerous faults
- Easy installation: Ready to drop into legacy Type S NEMA Size 0/1 starters, helping you maintain uptime and prevent costly motor damage
- Three-pole design for simultaneous protection across all phases
Technical Specifications
| Model Number | Square D 9065 TD 8 |
| Manufacturer | Schneider Electric (Square D) |
| Relay Type | Solid-State Thermal Overload Relay |
| Adjustable Current Range | 8–11.5 A |
| Poles | 3-Pole |
| Contact Form | 1 NC (Normally Closed) |
| Voltage Rating | 600 VAC / 300 VDC (maximum) |
| Frequency | 50/60 Hz |
| Trip Repeatability | ±2 % |
| Phase-Loss Response | ~3 seconds at 25% imbalance |
| Certifications | UL, CSA |
| Condition | New in Box |
| Series/Class | Class 9065, Series A |
Typical Applications
The Square D 9065 TD 8 excels in mid-range motor protection roles, particularly effective for:
- HVAC units and air-handling systems
- Centrifugal and reciprocating pumps
- Conveyor systems and material-handling equipment
- Industrial fans and blowers
- Compressors and refrigeration equipment
- Water treatment and circulation systems
The adjustable 8–11.5 A range makes it suitable for motors in the fractional to 3 horsepower range, depending on voltage and motor efficiency class.
Compatibility & Replacements
Compatible With
- Square D / Schneider Electric Class 9065 starters (all types)
- NEMA Size 0 and Size 1 manual and magnetic motor starters
- Type S solid-state starter platforms
- Retrofit applications in legacy three-phase motor control systems
- 50/60 Hz industrial power systems
Replaces / Drop-In Replacement For
The Square D 9065 TD 8 directly replaces equivalent Class 9065 thermal overload relays rated for 8–11.5 A operation. When sourcing replacements, verify the exact thermal rating (heater element) with the motor nameplate to ensure proper trip coordination. Consult the Square D Class 9065 Overload Relays catalog (reference 9065CT9701) for compatible thermal unit selections across different motor sizes.
Works With
- Square D Motor Logic ecosystem (Class 9065 family)
- Schneider Electric EcoStruxure industrial automation platforms
- Manual and automatic motor starter systems
- NEMA-rated industrial control panels
- Auxiliary alarm and indicator light circuits (via NO/NC contacts)
