Series Coil – What is it in Vaping?

Definition

A Series Coil is a coil build in which two or more heating elements are wired one after the other, so electrical current passes through each coil in sequence. In vaping, the primary purpose of a series coil setup is to double the total resistance while still enjoying the surface-area benefits of multiple coils. This configuration is popular among Australian vapers who want warmer, denser vapour from a mechanical or regulated series mod, but need to stay above Sub-Ohm thresholds for Battery Safety”>battery safety.

Technical Details

When coils are wired in series, their individual resistances add together. For example, two 0.25 Ω coils become 0.5 Ω total, whereas in parallel they would drop to 0.125 Ω. The higher resistance reduces current draw, allowing safer operation on 7.4 V (2-cell) series mods. Key specifications:

• Resistance range: Typically 0.4–1.2 Ω total.
• Wire mass: Larger than single coils; mass must be balanced with ramp-up time.
• Common types: Dual-coil fused claptons, staggered staples, framed staples.
• Leg length: Each coil needs an extra “bridge” leg between the two positive posts or series deck.

Deck styles include dedicated series decks with a central shared positive block, or standard postless decks with creative leg routing.

Usage & Tips

Practical tips:

• Ensure identical coil specs to prevent uneven heating and hot spots.
• Use a regulated mod or Short Circuit Protection enabled Kit“>Starter Kit when learning; series coils can exceed 8 V on fresh batteries.
• CottonSteeping (saturation time) is longer—prime generously to avoid dry hits.
• Check for hot legs after pulsing; trim or adjust leg length to balance heat across both coils.

Safety: Always verify total resistance with a reliable Ohm Reader”>ohm reader before firing; never use in parallel or hybrid mechs not designed for 7.4 V output.

History & Context

Series coils emerged in the mid-2010s alongside the rise of dual-battery Squonk Mod and series mech devices. Australian builders adopted them to achieve high-wattage performance without breaching Sub-Ohm safety limits, influencing today’s regulated series box mods and dedicated series RDA designs.