- 积分
- 264
- 在线时间
- 7284 小时
- 最后登录
- 2024-2-29
- 阅读权限
- 50
- 精华
- 0
- UID
- 32153
- 帖子
- 271
- 精华
- 0
- 经验
- 264 点
- 金钱
- 260 ¥
- 注册时间
- 2007-12-13
|
本帖最后由 gdst 于 2018-10-12 11:50 编辑
没换,估计区别不大,双对管频率特性有差别而已
Type Designator: ZTX557
Material of Transistor: Si
Polarity: PNP
Maximum Collector Power Dissipation (Pc): 1 W
Maximum Collector-Base Voltage |Vcb|: 300 V
Maximum Collector-Emitter Voltage |Vce|: 300 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 1 A
Max. Operating Junction Temperature (Tj): 200 °C
Transition Frequency (ft): 75 MHz
Collector Capacitance (Cc): 10 pF
Forward Current Transfer Ratio (hFE), MIN: 50
Type Designator: ZTX457
Material of Transistor: Si
Polarity: NPN
Maximum Collector Power Dissipation (Pc): 1 W
Maximum Collector-Base Voltage |Vcb|: 300 V
Maximum Collector-Emitter Voltage |Vce|: 300 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 0.5 A
Max. Operating Junction Temperature (Tj): 200 °C
Transition Frequency (ft): 75 MHz
Forward Current Transfer Ratio (hFE), MIN: 50
Type Designator: ZTX757
Material of Transistor: Si
Polarity: PNP
Maximum Collector Power Dissipation (Pc): 1 W
Maximum Collector-Base Voltage |Vcb|: 300 V
Maximum Collector-Emitter Voltage |Vce|: 300 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 0.5 A
Max. Operating Junction Temperature (Tj): 200 °C
Transition Frequency (ft): 30 MHz
Collector Capacitance (Cc): 20 pF
Forward Current Transfer Ratio (hFE), MIN: 50
Type Designator: ZTX657
Material of Transistor: Si
Polarity: NPN
Maximum Collector Power Dissipation (Pc): 1 W
Maximum Collector-Base Voltage |Vcb|: 300 V
Maximum Collector-Emitter Voltage |Vce|: 300 V
Maximum Emitter-Base Voltage |Veb|: 5 V
Maximum Collector Current |Ic max|: 0.5 A
Max. Operating Junction Temperature (Tj): 200 °C
Transition Frequency (ft): 30 MHz
Collector Capacitance (Cc): 20 pF
Forward Current Transfer Ratio (hFE), MIN: 50 |
|