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Ⅱ. Naming rules of 1N4007 diode
Ⅲ. Technical parameters of 1N4007 diode
Ⅳ. Can we use 1N4004 instead of 1N4007?
Ⅴ. 1N4007 diode principle of operation
Ⅵ. Electrical characteristic curves of 1N4007 diode
Ⅶ. What is 1N4007 diode used for?
1N4007 is a silicon rectifier diode produced by Fairchild. Its maximum current-carrying capacity is 1A, and it can withstand peaks of up to 30A. Therefore, we can use it in the design of the current less than 1A circuit.
The 1N4007 serves as a versatile silicon rectifier diode, finding widespread application in diverse AC to DC rectifier circuits and bridge rectifier circuits. Employing unidirectional diode conductivity, it transforms alternating current into a unidirectional pulse of direct current. Its dimensions are 5.21 mm in length, 2.72 mm in width, and 2.72 mm in height.
The 1N4007 is available in a variety of package forms, the common ones being DO-41 and DO-204AL. It consists of a P-type semiconductor and an N-type semiconductor with a PN junction. In forward bias, current can flow through the PN junction, forming a forward current, while in reverse bias, the PN junction blocks current from passing through, forming a reverse voltage.
Alternative models:
• 1N5408
• BA159
• STTH110
• 1N4001
In the 1N4007 diode, the "1" in the model number indicates that it is a semiconductor device (i.e. diode) with a PN junction. The letter "N" is the registered mark of the US EIA (Electronic Industries Association). Diodes with this letter indicate that they are registered with the U.S. EIA. The number after "N" is the registration number of the device in the US EIA.
Since the naming method for semiconductor devices was established earlier in the United States, it has not been modified since. Therefore, the model number of these diodes produced by American companies can only show that they are diodes. It is impossible to determine whether they are germanium diodes or silicon diodes, let alone their parameters. If we want to know the detailed parameters of a certain diode, the best way is to consult the diode manual.
1. Forward Voltage Drop (VF): The 1N4007 has a low VF, generally below 1 volt. This means that this diode produces a very small voltage drop when forward current flows through it, thus reducing power loss.
2. Reverse Peak Voltage (RPV) : The RPV of the 1N4007 is 1000 volts, which means that this diode is safe to operate if the reverse voltage does not exceed 1000 volts.
3. Operating Temperature Range : The operating temperature range of 1N4007 is between -65°C and +175°C, so it can work in a wide temperature range.
4. Forward Current (IF): The IF of 1N40O7 is 1A maximum, which means that the diode can work safely if the forward current does not exceed 1A.
5. Maximum Reverse Current (IR): 1N4007 has a high IR value, that is, under the action of the reverse voltage, it can withstand the maximum reverse current of 5 mA, which can ensure the normal operation of the diode.
The ratings and characteristics of the two diodes, 1N4004 and 1N4007, are almost the same, but their maximum repetitive reverse voltage is very different. When we want to replace a diode, the maximum repetitive reverse voltage and the average forward current are important factors to check. Therefore, the maximum value (Io) of these two diodes is the same, but the maximum value of 1N4004 is 400 V while 1N4007 is 1000 V. Therefore, we can't replace the 1N4007 with 1N4004 when the output load voltage of 1N4007 is higher than 320 V. (Maximum repetitive reverse voltage of 1N4004 is 400 V, but this is its absolute maximum rating, and the manufacturer does not recommend using a diode at its absolute maximum rating. Therefore, as a rule of thumb, we use it at least 20 percent below its maximum rating). However, in most cases we can easily use 1N4004 instead of 1N4007 because most of the circuits that use these diodes have voltages below 12V, 24V, or 48V, and therefore 1N4004 can easily be used instead of 1N4007 in such cases.
1N4007 diode is a common rectifier diode, it works by using the junction formed by the P-type and N-type semiconductors of the semiconductor material. Its positive pole is connected to the P-type semiconductor, the negative pole is connected to the N-type semiconductor. When the positive voltage is higher than the negative voltage, a conductive path is formed so that current flows from the positive to the negative. When the negative voltage is higher than the positive voltage, a high-resistance region occurs in the conductive path and current cannot pass through.
1N4007 diode has a single conductivity, that is, only the positive voltage is higher than the negative voltage, the current can flow through it. Therefore, it is commonly used as a rectifier in power supply circuits to convert AC to DC. For example, when AC power is fed into a 1N4007 diode, it will only allow current to flow half the time (i.e., half the time that the voltage is positive), and such current will behave as a unidirectional DC current in the circuit.
• Power supply filtering: 1N4007 can be used in power supply filtering circuits to help reduce pulsations in the power supply and provide a relatively stable DC output.
• Power protection: It can also be used for overcurrent protection in power supply circuits. When the direction of the current is reversed, the 1N4007 will act to stop the current, thus protecting other circuit components from damage.
• Current limit: In some applications, the 1N4007 can also be used to limit the direction of the current and prevent the current from flowing back to certain parts.
• Inverter: In some inverter circuits, the 1N4007 can be used to realize DC to AC conversion. It acts as a switching element at the output of the inverter to help control the output waveform.
• Rectifier: The 1N4007 is mainly used as a rectifier to convert AC to DC. In a power supply circuit, the AC power passes through the rectifier diode, allowing the current to flow in only one direction, thus realizing the output of DC power.
Frequently Asked Questions
1. Can I use 1N4007 instead of 1N4002?
1N4002 can easily be replaced with other diodes of this series such as 1N4003, 1N4004, 1N4005, 1N4006, 1N4007.
2. What is the difference between diode 4001 and 4007?
The only difference is the reverse voltage. The 1N4001 can withstand 50 volts reverse, and the 1N4007 can withstand 1000 volts reverse votage. There is no other difference in the datasheet. They are already very cheap, but the 1N4001 is typically 1 or 2 cents cheaper.
3. What is the difference between diode 4001 and 4007?
The only difference is the reverse voltage. The 1N4001 can withstand 50 volts reverse, and the 1N4007 can withstand 1000 volts reverse votage. There is no other difference in the datasheet. They are already very cheap, but the 1N4001 is typically 1 or 2 cents cheaper.
4. Is 1N4007 diode silicon or germanium?
The 1N4007 is a popular 1A general-purpose silicon rectifier diodes. It comprises of diffused PN junction and has a low reverse leakage current of 5 micro-A.
5. What is the difference between SM4007 and 1N4007?
1N4007 and SM4007 are actually diodes of the same model series. The difference lies in the model prefix, so the final difference is reflected in the package form. 4007 is a commonly used rectifier diode in low-frequency power supplies.