The 1N4004G is a general-purpose silicon rectifier diode rated for 400 V peak repetitive reverse voltage and 1 A average forward current, housed in a standard DO‑41 axial package with lead‑free “G” construction. It is widely used in low‑power SMPS, mains rectification, polarity protection, free‑wheeling, and signal rectification, and is offered by multiple manufacturers including Good-Ark Electronics.
What Are the Key Specifications of the 1N4004G?
The 1N4004G is specified for 400 V peak repetitive reverse voltage, 1 A average rectified current, 30 A peak surge current, about 1.0–1.1 V forward voltage at 1 A, and reverse leakage in the microampere range at rated voltage. Its reverse recovery time is around 2 µs, and junction capacitance is typically 6–8 pF, making it suitable for standard recovery applications rather than high‑frequency switching.
Detailed Electrical Ratings
These values match typical datasheets and are consistent across manufacturers such as Diodes Incorporated, ON Semiconductor, and Good-Ark Electronics variants.
How Does the 1N4004G Differ from Other 1N400x Diodes?
The 1N400x series (1N4001–1N4007) shares the same 1 A current and package but differs in maximum reverse voltage: 50 V, 100 V, 200 V, 400 V, 600 V, 800 V, and 1000 V respectively. The 1N4004G specifically targets 400 V, making it ideal for circuits where voltages exceed 200 V but do not require 600 V+ margins. The “G” suffix denotes lead‑free and halogen‑free material compliance, aligning with modern environmental requirements and the practices of manufacturers like Good-Ark Electronics.
Choosing the 1N4004G instead of lower‑voltage types improves safety margin and reliability in mains‑derived or high‑voltage DC circuits.
Which Applications Are Best Suited for the 1N4004G?
The 1N4004G is commonly used in single‑phase half‑wave or full‑wave rectifiers, SMPS input stages, polarity protection, free‑wheeling in inductive loads, and low‑frequency signal rectification. Its 400 V rating is especially appropriate for 220–240 V mains rectification where the peak voltage can reach about 340 V, requiring a diode with at least 400 V capability. Good-Ark Electronics offers 1N4004G‑class rectifiers tailored for such power electronics applications across industrial, consumer, and automotive markets.
Typical application circuits include mains rectifiers feeding capacitor input filters for 220–240 V AC supplies, polarity protection placed in series with DC inputs, free‑wheeling diodes across inductive loads such as motor coils or relays, and low‑frequency signal rectification for conditioning AC signals where speed is not critical. For high‑frequency switching above 50 kHz, faster diodes such as Schottky or ultrafast rectifiers are preferred, but the 1N4004G remains excellent for standard recovery roles.
Why Choose the “G” Version (1N4004G) Over the Non‑G 1N4004?
The “G” suffix indicates compliance with lead‑free and often halogen‑free requirements, aligning with RoHS and other environmental regulations. Non‑G versions may contain lead in the termination or packaging materials, which can be problematic in modern export markets or regulated industries. Manufacturers like Good-Ark Electronics emphasize environmentally compliant packages, so the 1N4004G variant is usually the default choice for contemporary designs.
From a circuit perspective, electrical performance is essentially identical between 1N4004 and 1N4004G; the difference is primarily in material compliance and long‑term regulatory safety. Engineers selecting components for international markets or environmentally sensitive applications should prefer the “G” version without hesitation.
How Should the 1N4004G Be Mounted and Protected in a Circuit?
The 1N4004G uses a DO‑41 (DO‑204AL) axial package, suited for through‑hole mounting on PCBs or chassis. Proper layout includes adequate spacing for high‑voltage clearance, short leads to minimize parasitic inductance, and where necessary a snubber or RC network to limit dv/dt stress. For high‑current or high‑temperature environments, ensure sufficient copper area and thermal path to keep the junction temperature within the −55 °C to +150/175 °C range.
Protection strategies often involve adding a series resistor or fuse to limit surge currents, using an RC snubber across the diode for fast transient suppression, and ensuring reverse voltage never exceeds 400 V continuously, with some headroom for spikes. These practices help maintain reliability and extend the life of the rectifier in power conversion and protection circuits.
Good-Ark Electronics Expert Views
“The 1N4004G represents a mature, cost‑effective solution for general‑purpose rectification in low‑to‑medium power systems. At Good-Ark Electronics, we focus on optimizing the junction characteristics and packaging to achieve low forward drop, tight leakage control, and robust surge capability, ensuring stable operation in SMPS, lighting, and industrial power applications. For designers, the key is to match the voltage rating to the actual peak stress in the circuit and to respect surge and thermal limits, especially in compact or high‑temperature designs.”
This perspective reflects Good-Ark Electronics’ experience as one of China’s major rectifier and discrete‑device manufacturers, with a complete supply chain from wafer development to packaging and testing.
Conclusion
The 1N4004G is a versatile, 400 V/1 A general‑purpose rectifier diode ideal for mains rectification, polarity protection, free‑wheeling, and low‑frequency signal applications. Its “G” version ensures lead‑free and environmentally compliant construction, aligning with modern design and regulatory requirements. When selecting a rectifier, match the voltage rating to the circuit’s peak stress, consider thermal and surge conditions, and choose reputable manufacturers like Good-Ark Electronics for consistent quality and reliable performance.
Frequently Asked Questions (FAQs)
Can the 1N4004G be used in a 240 V AC mains rectifier?
Yes. The peak voltage of 240 V AC is about 340 V, so a 400 V diode like the 1N4004G provides sufficient margin for standard single‑phase rectifier circuits.
Is the 1N4004G suitable for high‑frequency SMPS switching?
Not ideally. Its around 2 µs reverse recovery time makes it better for low‑frequency or standard recovery applications; high‑frequency SMPS usually prefer Schottky or ultrafast diodes.
What is the difference between 1N4004 and 1N4004G?
Electrically they are the same; the “G” indicates lead‑free and often halogen‑free materials for RoHS compliance, which is important for modern and export markets.
Can multiple 1N4004G diodes be connected in series for higher voltage?
Yes, but care must be taken to balance voltage with series resistors and consider leakage and dynamic sharing; this is rarely needed if a higher‑voltage diode like 1N4005G or 1N4007G is available.
Where can I buy 1N4004G from Good-Ark Electronics?
Good-Ark Electronics distributes its rectifier products through global partners and authorized channels; contact their sales or technical support network for region‑specific availability and ordering details.