| Parameters | 
                                                                                                            
                                            | Mount | Surface Mount, Through Hole | 
                                                                            
                                            | Mounting Type | Through Hole | 
                                                                            
                                            | Package / Case | 16-DIP (0.300, 7.62mm) | 
                                                                            
                                            | Number of Pins | 16 | 
                                                                            
                                            | Weight | 1.627801g | 
                                                                            
                                            | Operating Temperature | -40°C~85°C TA | 
                                                                            
                                            | Packaging | Bulk | 
                                                                            
                                            | JESD-609 Code | e3 | 
                                                                            
                                            | Pbfree Code | yes | 
                                                                            
                                            | Part Status | Obsolete | 
                                                                            
                                            | Moisture Sensitivity Level (MSL) | 1  (Unlimited) | 
                                                                            
                                            | Number of Terminations | 16 | 
                                                                            
                                            | ECCN Code | EAR99 | 
                                                                            
                                            | Terminal Finish | Matte Tin (Sn) | 
                                                                            
                                            | Subcategory | Switching Regulator or Controllers | 
                                                                            
                                            | Max Power Dissipation | 750mW | 
                                                                            
                                            | Technology | BCDMOS | 
                                                                            
                                            | Terminal Position | DUAL | 
                                                                            
                                            | Number of Functions | 1 | 
                                                                            
                                            | Terminal Pitch | 2.54mm | 
                                                                            
                                            | Frequency | 1MHz | 
                                                                            
                                            | Base Part Number | SI9120 | 
                                                                            
                                            | Pin Count | 16 | 
                                                                            
                                            | Number of Outputs | 1 | 
                                                                            
                                            | Output Voltage | 9.7V | 
                                                                            
                                            | Input Voltage-Nom | 10V | 
                                                                            
                                            | Analog IC - Other Type | SWITCHING CONTROLLER | 
                                                                            
                                            | Operating Supply Current | 1.5mA | 
                                                                            
                                            | Power Dissipation | 750mW | 
                                                                            
                                            | Output Current | 125mA | 
                                                                            
                                            | Voltage - Supply (Vcc/Vdd) | 9.5V~13.5V | 
                                                                            
                                            | Input Voltage (Min) | 9.5V | 
                                                                            
                                            | Topology | Flyback, Forward | 
                                                                            
                                            | Control Mode | CURRENT-MODE | 
                                                                            
                                            | Frequency - Switching | 40kHz~1MHz | 
                                                                            
                                            | Control Technique | PULSE WIDTH MODULATION | 
                                                                            
                                            | Rise Time | 40ns | 
                                                                            
                                            | Fall Time (Typ) | 75 ns | 
                                                                            
                                            | Switcher Configuration | SINGLE | 
                                                                            
                                            | Internal Switch(s) | No | 
                                                                            
                                            | Max Duty Cycle | 50 % | 
                                                                            
                                            | Drain to Source Resistance | 20Ohm | 
                                                                            
                                            | Output Isolation | Isolated | 
                                                                            
                                            | Height | 3.81mm | 
                                                                            
                                            | Length | 21.33mm | 
                                                                            
                                            | Width | 7.11mm | 
                                                                            
                                            | REACH SVHC | Unknown | 
                                                                            
                                            | RoHS Status | ROHS3 Compliant | 
                                                                            
                                            | Lead Free | Lead Free | 
                                                                                                    
                            
                         
                                                SI9120DJ-E3 Overview
In the 16-DIP (0.300, 7.62mm) package, the ac to dc converter is embedded.In Bulk case, the ac dc converter is available.As you can see, this AC/DC converter is mounted in the way of Through Hole .For the ac dc converter to perform at its best, it should be operated at a temperature of -40°C~85°C TA °C.Analog ICs of type SWITCHING CONTROLLER are used in this AC DC converter.As a result, the switching frequency reaches 40kHz~1MHz .Within the range of 9.5V~13.5V supply voltage (Vcc/Vdd), it can be used.It has a total of 16  terminations.The ac/dc converter has 16 pins.In this ac-dc converter, there are 16   pins.There are no problem mounting the ac dc converters by Surface Mount, Through Hole .A similar acdc converter can be searched by using the SI9120  family.There are 1  outputs to run.The ac to dc conversions are contained in Switching Regulator or Controllers .We have set the output current to 125mA .There is 9.7V  output voltage from this AC/DC converter.As long as AC to DC converter is operated at frequency 1MHz ,it is capable of attaining high efficiency.Here is the standard for REACH SVHC : Unknown .
SI9120DJ-E3 Features
Packaged with 16-DIP (0.300, 7.62mm)
Switching Frequency at 40kHz~1MHz
With 16 pins
Output Current at 125mA 
SI9120DJ-E3 Applications
There are a lot of Vishay Siliconix SI9120DJ-E3 AC DC Converters applications. 
- Small off-line low voltage power supplies
- Lighting controls
- Shaver Charger
- ATX/BTX Auxiliary Power
- Humidifier
- Battery chargers for cellular phones
- Power tools
- Standby and Auxiliary Power Supplies Set Top Boxes (STB)
- MPS parts
- Utility meters