OL · SSR · TR
Relays are selected by function, range and interface.
A thermal overload relay protects a motor differently from a circuit breaker. A solid-state relay and a time relay also require different load, control and timing data.
Relay families in phase one
OL
NR2 Thermal Overload
0.1-150 A family, class 10A, phase-loss protection, temperature compensation, manual/auto reset and 1NO+1NC auxiliary contacts.
Verified from 2026 compilationE-OL
NRE8 Electronic Overload
NRE8-25, NRE8-38, NRE8-40 and NRE8-100 families cover catalog adjustment ranges from 0.6 A to 100 A, depending on frame. Contactor compatibility must be confirmed when ordering NRE8-100.
Verified from 2026 compilationSSR
NJG Solid State Relays
Selection requires input control voltage, output load voltage, load current, heat sinking and switching mode.
Series map establishedTR
Time & Control Relays
Specify supply voltage, timing function, time range, contact arrangement, socket and mounting method.
Series map establishedRepresentative NR2 ranges
| Frame | Verified adjustment ranges | Rated insulation voltage | Mounting |
|---|---|---|---|
| NR2-11.5 | 0.1-0.16 through 9-13 A | 690 V | Direct or independent with MB-1 |
| NR2-25 | 0.1-0.16 through 17-25 A | 690 V | Direct or independent with MB-2 |
| NR2-36 | 23-32 and 28-36 A | 690 V | Direct or independent with MB-3 |
| NR2-93 | 23-32 through 80-93 A | 690 V | Direct or independent with MB-4 |
| NR2-150 | 80-104, 95-120, 110-150 A | 690 V | Configured for larger contactors |
Protection boundary: An overload relay protects against sustained overload and phase loss. Short-circuit protection still requires the correctly coordinated protective device.