Overview
The Durakool BB-7002 is a single-pole single-throw normally-closed (SPST-NC) mercury displacement relay engineered for general-purpose industrial control and switching applications. With a 120V 60Hz coil and rated for 600V AC / 240V DC contact voltage, this panel-mount relay provides dependable switching performance in a compact footprint.
Key Features
- SPST-NC (Single-Pole Single-Throw Normally Closed) contact configuration for fail-safe switching logic
- 120V 60Hz coil voltage for North American mains supply compatibility
- 30A contact current rating with 600V AC and 240V DC contact voltage capability
- Panel-mount design with screw terminals for secure, tool-friendly installation
- Mercury displacement contact technology for reliable, long-life switching
- 902 ohm coil resistance and 5 kV minimum breakover voltage for noise immunity
Technical Specifications
- Coil Voltage: 120V AC 60Hz
- Contact Configuration: SPST-NC
- Contact Current: 30A
- Contact Voltage (AC): 600V
- Contact Voltage (DC): 240V
- Coil Resistance: 902 ohm
- Mounting: Panel Mount
- Terminals: Screw
- Breakover Voltage (Min): 5 kV
- Product Series: BB Series
Typical Applications
The BB-7002 is commonly used in:
- Industrial motor control and machine automation
- HVAC system controls and interlocking circuits
- Pump and compressor switching circuits
- General electrical switching and control logic in manufacturing equipment
- Legacy system retrofitting and maintenance where mercury relays are specified
Compatibility & Replacements
Compatible With
- 120V 60Hz AC mains supply systems
- Industrial control panels and enclosures
- Standard DIN rail and panel-mount relay sockets
- General-purpose switching circuits rated for 30A at 600V AC
Replaces / Drop-In Replacement For
Verify compatibility with your system integrator before ordering. The BB-7002 is a legacy product; original equipment manufacturers’ documentation should be consulted to confirm drop-in replacement status with other mercury relay models.
Works With
- Industrial control logic systems requiring NC (normally closed) contact switching
- Hard-wired relay control circuits and pneumatic logic systems
- Emergency stop and fail-safe interlocking architectures
- Legacy automation equipment from the 1980s–2000s era
