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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 51. |  1N4129 | Zener Voltage Regulator Diode | MSEMI | DO-35 | - | - | - | 86K |
| 52. | 1N4129UR-1 | Zener Voltage Regulator Diode | MSEMI | DO-213AA | - | - | - | 86K |
| 53. | R1223N412A-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 54. | R1223N412B-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 55. | R1223N412C-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 56. | R1223N412D-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 57. | R1223N412E-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 58. | R1223N412F-TR | PWM/VFM step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 59. | R1223N412G-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 300kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
| 60. | R1223N412H-TR | Step-down DC/DC converter with low supply current by CMOS. Output voltage 4.1V. Oscillator frequency 500kHz. Standard taping specification TR | RICOH | SOT-23 | 5 | -40°C | 85°C | 207K |
