T46 redirects here. Or see T-46.The SJ Class T46 is a diesel-electric locomotive used by Malmtrafik for shunting at Kiruna in Sweden. Four locomotives were built by Nyquist & Holm (NOHAB) as upgrades versions of T44 in 1973–74. The T46 features more powerful engines and six instead of four axles. It is the most powerful diesel locomotive used in Sweden.