Siemens HF221N Fusible Disconnect

Siemens HF221N is a 30-amp, 240-volt fusible safety switch (fuse disconnect) engineered to provide a safe, code-compliant indoor disconnect for 240V circuits. It belongs to the VBII Heavy-Duty family and is a 2-pole, 3-wire device (including neutral) housed in a NEMA 1 indoor enclosure. The unit uses two fuses to protect the circuit and interrupt power quickly for maintenance or emergency shutdowns, with an interrupting rating up to 200 kA at 240V. Designed for indoor Type 1 environments, it serves as a reliable service disconnect for equipment fed from a 240V supply. Key specifications include 30A rating, 240V operation, two poles, three wires, fusible protection, and an indoor enclosure; the HF221N is commonly specified in Siemens VBII-HD-30A documentation and is widely available from major electrical suppliers.