Suntan Technology Company Limited – All Kinds of Capacitors
Engineers often find themselves comparing choices like 1N4148 vs 1N4007, US1M vs M7, or deciding between Zener diode and Triac/MOSFET for load control. This guide clarifies key practical differences that impact real-world design decisions.
1N4148 vs 1N4007
1N4148 is a fast switching diode (trr ~4 ns) for high-speed circuits. 1N4007 is a general rectifier (1000 V, 1 A), slower but robust for AC rectification. Use 1N4148 for signal-level, 1N4007 for power-level.
US1M vs M7
US1M (ultra-fast, 50–75 ns) is suited for SMPS. M7 is robust for adapters/chargers. Prefer US1M for efficiency, M7 for durability.
Zener Diode Selection
The 1N4727A–1N4761A series covers 3–75 V, 1 W. Lower values for references, higher values for surge protection.
Triac vs MOSFET
Triac BT134 (600 V, 4 A RMS, 40 A surge) is good for AC load control (lighting, heating, motors). MOSFETs are better for high-speed DC and PWM. For AC → Triac; for DC → MOSFET.
Quick Summary
- 1N4148 vs 1N4007 – Fast switching vs power robustness
- US1M vs M7 – SMPS efficiency vs adapter durability
- Zener (1 W) – Reference or surge protection
- Triac vs MOSFET – AC loads vs DC/PWM control
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