straight leads

**Straight leads** is the **unbent lead style used primarily in through-hole packages where leads pass directly through PCB holes** - they provide strong mechanical anchoring and robust solder joints for many legacy and power applications. **What Is Straight leads?** - **Definition**: Leads extend linearly from the package body without complex bend geometry. - **Typical Packages**: Common in DIP and other through-hole form factors. - **Assembly Method**: Inserted into plated through holes and soldered by wave or selective processes. - **Mechanical Character**: Through-hole anchoring supports high mechanical durability. **Why Straight leads Matters** - **Robustness**: Strong lead anchoring suits high-vibration or connector-adjacent applications. - **Thermal Handling**: Larger lead cross sections can support higher current and heat flow. - **Manufacturing Fit**: Preferred in products that still use mixed through-hole assembly lines. - **Space Tradeoff**: Consumes more board area than modern fine-pitch SMT alternatives. - **Legacy Support**: Essential for long-lifecycle products with established form factors. **How It Is Used in Practice** - **Hole Design**: Match drill diameter and annular ring to lead dimensions and tolerance. - **Insertion Control**: Manage insertion force to prevent lead bending and board damage. - **Solder Profile**: Optimize wave or selective solder settings for full barrel fill. Straight leads is **a durable through-hole termination style with proven field robustness** - straight leads remain valuable where mechanical strength and legacy compatibility are higher priority than density.