Knife Edge And Non Disconnecting Type Terminal Blocks
- Type:
- Knife-disconnect terminal block, With test socket screws for insertion of test plugs
- Nominal Voltage:
- 500 V
- Nominal Current:
- 16 A
- Thermal Continuous Current Ith:
- 16 A
- Connection Method:
- Screw connection
- Rated Cross Section:
- 4 mm²
- Cross Section:
- 0.2 mm² - 6 mm²
- Color:
- gray
Modern control cabinets and industrial automation panels require dependable circuit isolation for signal verification and routine maintenance. Implementing Disconnect & Test Terminal Blocks provides physical disconnection across analog loops and metering paths without lifting conductors. Utilizing a knife edge terminal introduces an insulated lever that swings open, isolating circuits during fault diagnostics and commissioning.
Circuit Isolation Versus Continuous Feed-Through
Signal circuits and power lines demand distinct connection topologies across terminal rails:
-
Rapid isolation and testing: In sensor circuits, a knife edge terminal block isolates signal loops while dual test sockets receive multimeter probes for current measurements.
-
Permanent signal conduction: A non disconnecting type terminal block maintains an unbroken conductive path for standard potential distribution, eliminating movable contacts where isolation remains unnecessary.
Operational Advantages in Control Panels
Selecting the proper terminal geometry prevents unplanned outages and simplifies maintenance routines:
-
Visual status indication: Operating a knife type terminal block provides an unmistakable physical gap, preventing accidental contact during circuit calibration.
-
High contact security: Robust screw clamp connection mechanisms secure conductors ranging from 0.2 mm² to 2.5 mm², resisting severe vibration inside high-density enclosures.
Technical Specifications
| Parameter | Specification |
|---|---|
| Mounting Profile | DIN Rail NS 35/7.5 |
| Rated Insulation Voltage | 500 V |
| Nominal Current | 16 A |
| Clamping Range | 0.2 mm² – 2.5 mm² (24 – 14 AWG) |
| Housing Material | Polyamide PA66 (UL 94 V-0) |
| Terminal Width | 6.2 mm |
| Test Point Access | Dual integrated test sockets |
Housing components molded from flame-retardant PA66 polyamide ensure thermal stability across continuous operating environments, maintaining dependable performance throughout the life cycle of industrial machinery.
| Model | Function | Wire IEC cross-section | Wire UL | Thickness |
| JHD5-2.5SK |  |
4 mm² 2.5 mm² 4 mm² |
12 AWG 14 AWG 12 AWG |
6.2 mm |
| Maximum current | Number of packages | Thickness/Height( )/Width mm |
Rated voltage/rated current/rated cross-sectior |
| 16 A | 84 | 6.2/58.5/51 | 800V/16A/4 mm² |
Specfication:
| Marking tags | ZB6 |
| Screw/Tightening torque(Nm) | M3/0.6 |
| Material | PA |
| Flame retardant rating UL-94 | V0 |
| Dimensions |  |
With universal mounting feet for standard top-hat(Ω profile) and G-profile DIN rail mounting.
