Push-in Terminal Block Technical Specifications

The long-term stability of electrical connection systems is directly related to the standardization of the design and verification of push fit connector block. GB/T 14048.7 and IEC 60947-7-1 also establish a full life-cycle technical specification system for push fit terminal, covering three dimensions: structural design, material selection, and performance verification.

Structural mechanical strength is strictly constrained by standards. The impact strength (typically ≥20kJ/m²), flame retardancy rating (e.g., UL94 V-0), and yield strength of the metallic conductors of the push fit terminal block connector body insulation material must match the specification parameters. The design of the spring geometry must maintain constant contact pressure to prevent connection failure due to stress relaxation. Tolerance control is accurate to ±0.1mm to ensure batch consistency.

Electrical reliability verification relies on a dual testing protocol. Temperature rise testing simulates full-load conditions: under rated current loading, the temperature rise at the push in connector block connection point must not exceed the standard threshold (e.g., ΔT≤45K). Simultaneously, 1000 insertion/removal cycles are performed to monitor the contact resistance fluctuation range (IEC specifies a deviation ≤20%). Abnormal data indicates spring fatigue or plating wear.