DOUBLE STACK 5 SWITCH SEQUENCE

What it is

• Brand: Supco
• Type: Electric heat sequencer (not a thermocouple)
• Function:
  • Staggers activation of electric heat strips
  • Controls blower motor timing
  • Prevents electrical load spikes in HVAC systems

Key specs

• Control voltage: 24V
• Contact configuration: multi-stage (DPST/SPST combination)
• Time delay: adjustable ON/OFF sequencing (typically 1–160 seconds ranges depending on stage)
• Application:
  • electric furnaces
  • air handlers with heat strips
  • heat pump auxiliary heat

Important clarification

• ❌ This is not a sensor
• ❌ Not a thermocouple (unlike SHL / Q340 series)
• ✔ It is a relay timing/sequencing control device