The KF390 / DG390 5.0mm Pitch 5-Pin Spring Terminal Block is a screwless, push-in cage clamp terminal block designed for fast, tool-free wire-to-board electrical connections. Constructed with a durable flame-retardant polyamide housing and high-tension stainless steel spring contacts, this 5-way terminal block provides vibration-resistant wire retention, low contact resistance, and rapid wiring assembly. It is widely used in industrial automation, multi-channel sensor arrays, RGBW LED lighting controls, communication bus interfaces, and microcontroller development projects.

Specifications

• Model / Series: KF390 / DG390 Series (Screwless Spring Terminal Block)
• Number of Pins / Ways: 5-Pin (5-Way)
• Pin Pitch / Spacing: 5.0mm (0.197 inches) / 5.08mm compatible
• Termination Method: Push-In Spring Clamp (Screwless / Tool-Free lever actuation)
• Rated Voltage: 250V to 300V AC/DC (IEC / UL standard)
• Rated Current: 10A (IEC) / 8A to 10A (UL)
• Dielectric Withstanding Voltage: 2000V AC for 1 minute
• Contact Resistance: ≤ 20mΩ
• Insulation Resistance: ≥ 5000MΩ (at 500V DC)
• Applicable Wire Gauge: 22 AWG to 14 AWG (0.5mm² to 2.5mm² solid or stranded wire)
• Wire Strip Length: 8mm to 10mm
• Housing Material: Polyamide (PA66, UL94 V-0 flame retardant)
• Contact / Pin Material: Tin-Plated Brass / Phosphor Bronze Solder Pins
• Spring Clamp Material: High-Tension Stainless Steel
• Operating Temperature Range: -40°C to +105°C
• Mounting Type: PCB Through-Hole Solder Mount

Features

• Screwless Push-In Clamping: Enables fast, single-handed wire insertion by simply depressing the top spring actuator lever with a small flat screwdriver or finger.
• Vibration-Proof Retention: Constant spring pressure automatically compensates for wire temperature changes and eliminates screw loosening caused by mechanical vibrations.
• Versatile 5-Pin Layout: Perfect for 5-wire interfaces including RGBW LED lighting (+, R, G, B, W), multi-signal sensor headers (VCC, GND, Signal 1, Signal 2, Signal 3), and SPI communication buses.
• Compact 5.0mm Pitch: Offers a space-saving PCB footprint while maintaining sufficient high-voltage clearance and creepage distance.
• Flame-Retardant Housing: Molded from high-grade UL94 V-0 PA66 thermoplastic for reliable thermal stability and safety under continuous current loads.
• Modular Side Interlocking: Features side dovetail tabs allowing multiple blocks to be snapped together to create custom-length terminal strips.

Common Applications

• RGBW & RGBCW LED Controllers: 5-wire connections for common anode (+), Red, Green, Blue, and White lighting channels.
• Communication & Programming Headers: Wiring for SPI buses (VCC, GND, MOSI, MISO, SCK) and multi-line serial communication links.
• Multi-Channel Sensor Breakout Boards: Connecting multiple analog/digital sensors sharing common VCC and GND lines.
• Industrial Control Panels: Field wiring for multi-position limit switches, optical encoders, and automation status signals.
• Microcontroller Prototyping: Clean, reusable I/O wiring for Arduino, ESP32, and custom industrial controller boards.

Usage Tips

• Wire Preparation: Strip approximately 9mm of insulation from the wire end. For stranded copper wire, twisting the strands or crimping a bootlace ferrule ensures smooth, snag-free insertion.
• Wire Insertion: Press the top actuator lever down firmly using a 2.0mm–2.5mm flathead screwdriver, insert the stripped conductor fully into the clamp opening, and release the lever to lock.
• Soldering Precaution: Solder the through-hole pins at 350°C for no more than 3 seconds per pin to avoid thermal softening of the plastic casing or misalignment of the pins.
• Current Handling: Ensure PCB copper traces connecting to high-current pins have adequate trace width or solder reinforcement to carry up to the 10A rated capacity safely.