The KF250 / DG250 series spring push-in PCB terminal blocks are screwless connectors for direct PCB mounting. A stainless spring cage clamps the wire the moment it is inserted — no screws, no crimped ferrules, no tools. The series is available in four pitches: 2.5 mm, 2.54 mm, 3.5 mm and 7.0 mm, covering high-density signal boards through power sections.
One Series, Four Pitches
| Model | Pitch | UL/cUL Rating | IEC Rating | Wire Range | Conductor | Stripping | Pin Dim. | PCB Hole |
|---|---|---|---|---|---|---|---|---|
| KF250-2.5 | 2.5 mm | 300V 2A | 160/250/320V, 2A | AWG 24-20 | 0.5 mm² | 9 mm | 3.5 mm | Ø1.2 mm |
| KF250-2.54 | 2.54 mm | 300V 2A | 160/250/320V, 2A | AWG 24-20 | 0.5 mm² | 9 mm | 3.5 mm | Ø1.2 mm |
| KF250-3.5 | 3.5 mm | 300V 5A | 200/250/400V, 5A | AWG 22-18 | 0.75 mm² | 8-9 mm | 3.6 mm | Ø1.2 mm |
| KF250-7.0 | 7.0 mm | 300V 5A | 200/250/400V, 5A | AWG 22-18 | 0.75 mm² | 8-9 mm | 3.6 mm | Ø1.2 mm |
Common data: housing PA66 (UL94 V-0) · contact copper alloy, tin-plated · impulse withstand 2.5 kV · operating temperature −40°C to +105°C · wire range solid/stranded/fine-stranded with ferrule · poles 01-XX (KF250-7.0: 02-3X).
How to Choose the Right Pitch
- 2.5 / 2.54 mm — signal and low-current boards where board space is tight; 2.54 mm matches the standard 0.1″ grid.
- 3.5 mm — the general-purpose workhorse, 5 A per contact for I/O modules, drives and power supplies.
- 7.0 mm — power section and relay outputs, generous creepage and clearances for 300 V working voltage.
Tool-Free Spring Wiring in 3 Steps
- Strip the wire 8–10 mm (no ferrule required).
- Insert a flat screwdriver into the actuator opening to open the spring cage — or simply push solid/stranded wire straight in.
- The spring clamps the conductor automatically; pull gently to confirm.
Multi-Pole Strips for Every Board
Poles can be combined into 2–12+ position strips. Center, side or dual PCB tabs and marking slots are available; multi-pole strips keep wiring tidy on PLC I/O cards, ballasts and control boards.
Applications
- PLC I/O modules and signal isolators
- LED drivers, ballasts and power supplies
- HVAC control boards and metering devices
- Relay and contactor output sections
Certifications & Quality
Certified to UL/cUL and CE; RoHS compliant. Insulation PA66 UL94 V-0, contacts copper alloy with tin plating for low contact resistance. Every batch is 100% inspected before shipment — the same factory that produces our 3.5 mm push-in spring terminals with push buttons.
Get a Quote
Need samples or a custom pitch/pole combination? Visit the full product page: DG250 / KF250 Spring Push-In PCB Terminal Blocks — factory direct, low MOQ, OEM/ODM welcome.
