Comparison of core differences
Package type: DB157 adopts a direct insertion package (usually labeled as DB), with pins soldered through PCB holes; DB157S adopts surface mount packaging (marked as DB-S or DBS-4), with gull shaped pins directly attached to the PCB surface.
Installation process: DB157 requires wave soldering or manual insertion, with a relatively large volume, which is conducive to manual maintenance; DB157S is compatible with reflow soldering automation production lines, with a compact size and space saving features.
Dimensional features: DB157 body is relatively thick (about 4-5mm+pin length); DB157S is designed with a thin profile (approximately 2.15-2.8mm in height) and measures approximately 8.5x6.5mm in length and width.
Application scenarios: DB157 is commonly found in traditional power supplies and situations that require high heat dissipation or mechanical strength; DB157S is widely used for miniaturized SMT circuit boards such as mobile phone chargers and LED drivers.
Selection suggestions
If the circuit board is designed for through hole insertion (THT) and there is ample space, choose DB157;
If it is surface mount technology (SMT) or pursuing miniaturization, DB157S must be selected. The electrical performance exchange between the two has no impact, but the physical packaging cannot be mixed.
