SMD vs Through-Hole Components: When to Use Which in 2026

# SMD vs Through-Hole Components: When to Use Which in 2026

*Published: 2026-06-21 | Category: Components Guide | Author: PartsCube Global*

The Short Answer

Use SMD for everything unless you have a specific reason to use through-hole.

Through-hole still has niche uses: high-power components, mechanical stress points (connectors), prototyping/breadboarding, and repair/replacement markets.

SMD vs Through-Hole Comparison

Factor	SMD	Through-Hole
PCB space	Much smaller	3-5× larger
Assembly cost	Low (automated)	High (often manual)
Prototyping	Harder (needs adapter boards)	Easy (breadboard)
Rework/repair	Possible with hot air	Easy with soldering iron
Mechanical strength	Lower	Higher
High-frequency performance	Better (shorter leads)	Worse (lead inductance)
Availability	Growing	Shrinking
Component cost	Cheaper per unit	More expensive

When Through-Hole Still Makes Sense

1. Connectors and Mechanical Stress Points

USB ports, barrel jacks, screw terminals — these take physical abuse. Through-hole mounting provides mechanical anchoring.

2. High-Power Components

Large electrolytic capacitors, power resistors, transformers — the lead mass and thermal requirements favor through-hole.

3. Prototyping and Education

Breadboards require through-hole. If your market is makers and students, DIP packages sell.

4. Repair and Replacement

Many legacy products (industrial equipment, audio gear) use through-hole. The repair market needs these parts.

SMD Sizes You Should Know

Size	Dimensions	Hand-Solderable?
1206	3.2×1.6mm	✅ Very easy
0805	2.0×1.25mm	✅ Easy
0603	1.6×0.8mm	✅ Doable with practice
0402	1.0×0.5mm	⚠️ Needs good tools
0201	0.6×0.3mm	❌ Machine only

For prototyping and hand assembly, use 0805 passives. They're small enough for compact layouts but still easily hand-solderable.

The Trend

New ICs are increasingly SMD-only. Through-hole versions of popular ICs (like the ATmega328P in DIP-28) are becoming more expensive and harder to find. If you're designing new products, design for SMD.

PartsCube Global stocks both SMD and through-hole components. Contact us for your specific requirements.