TE5®/ TR5® Fuses Littelfuse TE5®/ TR5® Fuses offer a 0.4A to 10A operating current range, 65V to 300V maximum voltage, and -40°C to +85°C operating temperature range. Littelfuse TR5 series is lead-free and features reduced PCB space requirements and a shock-safe casing. The TE5 series includes time-lag, fast-acting, transient tolerant, and inrush protector fuses.