NFR25H

NFR25/25H Vishay BCcomponents Fusible, Non-Flammable Resistors FEATURES Overload protection without risk of fire Wide range of overload currents. APPLICATIONS Audio Video. A homogeneous film of metal alloy is deposited on a high grade ceramic body. After a helical groove has been cut in the resistive layer, tinned connecting wires of electrolytic copper are welded to the end-caps. The resistors are coated with a grey, flame retardant lacquer which provides electrical, mechanical, and climatic protection. The encapsulation is resistant to all cleaning solvents in accordance with “MIL-STD-202E, method 215”, and “IEC 60068-2-45”. TECHNICAL SPECIFICATIONS DESCRIPTION Resistance range(1) Resistance tolerance and series Maximum dissipation at Tamb = 70 °C Thermal resistance Rth Temperature coefficient: 0.22 Ω ≤ R ≤ 4.7 Ω 4.7 Ω < R ≤ 15 Ω 15 Ω < R ≤ 15 kΩ Maximum permissible voltage (DC or RMS) Basic specifications Climatic category (IEC 60068) Stability after: load climatic tests soldering Note 1. Ohmic values (other than resistance range) are available on request. ∆R/R max.: ± 1 % + 0.05 Ω ∆R/R max.: ± 1 % + 0.05 Ω ∆R/R max.: ± 0.25 % + 0.05 Ω ≤ ± 200 × 10−6/K ≤ ± 200 × ≤ ± 100 × 10−6/K 10−6/K ≤ ± 200 × 10−6/K ≤ ± 100 × 10−6/K ≤ ± 100 × 10−6/K 350 V IEC 60115-1 and 60115-2 55/155/56 0.33 W 240 K/W VALUE NFR25 0.22 Ω to 15 kΩ ± 5 %; E24 series 0.5 W 150 K/W NFR25H 250 V 12NC ORDERING CODE INDICATING RESISTOR TYPE AND PACKAGING ORDERING CODE 23.. ... ..... BANDOLIER IN ...