PBKZ 4791

The PBKZ 4791 family comprises single‑level PCB terminal blocks with push‑in (pressure‑spring) connection technology, available in various pole configurations with a 2.54 mm pitch and compact footprint. The contact pins have a diameter of 0.7 mm, require a 1.2 mm drill hole and extend ~3.5 mm for solder connection. Rated for a maximum conductor cross-section of 0.75 mm² (strip length ~10 mm), AWG 26–18 solid or stranded (with ferrules limited to 0.14 mm²). Electrical specifications include 9 A at up to 130 V, impulse voltage resistance of 1.25 kV, contamination class 3, and overvoltage category III. The housing is flame‑retardant PBT (UL 94 V‑0), with CTI rating 600, insulation resistance ≥ 1×10¹³ Ω·cm, glow‑wire ignition rating GWIT 775 °C / GWFI 850 °C, and wave‑soldering capability at 265 °C for 3–4 sec. It supports around 10 connection cycles and operates between –40 °C and +105 °C. Approvals include UL 1059, CSA 22.2 No. 158, and VDE EN 60998 compliance.

The PBKZ 4791 terminal blocks are ideal for space‑constrained PCB assemblies that require fast and reliable wire connections, especially in compact control electronics, signal interfaces, and small‑scale distribution boards. The push‑in design enables tool‑free conductor insertion, simplifying wiring during assembly and reducing potential operator error. They're particularly useful for connecting low‑current signal lines, sensor wiring, or discrete I/O lines in automation, industrial control cabinets, or test equipment, where quick installation and compact layout are priorities. The high flame‑resistance, insulation durability, and global safety approvals also make the PBKZ 4791 suitable for certified electronic modules, embedded controllers, or PCB-mounted relays in machinery and building‑automation systems.