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Diodes Incorporated D4G-T
- Part No.:
- D4G-T
- Manufacturer:
- Diodes Incorporated
- Category:
- Single Diodes
- Package:
- T1, Axial
- Datasheet:
-
D4G-T.pdf
- Description:
- DIODE GEN PURP 400V 1A T-1
- Quantity:
- Payment:
- Shipping:
Inventory:63,840
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Product details
Overview
D4G-T from Diodes Incorporated is a 1.0A glass passivated general-purpose rectifier diode with 400V peak repetitive reverse voltage (VRRM), 1.0V forward voltage at 1.0A (VFM), and 30A non-repetitive surge capability (IFSM), used in AC/DC power supply input stages, adapter front-ends, and industrial power conversion circuits.
For engineers reviewing the D4G-T datasheet, D4G-T pinout, D4G-T application, or D4G-T equivalent, key selection criteria include its T-1 axial package, 100°C/W junction-to-ambient thermal resistance, 2.0µs typical reverse recovery time, and RoHS-compliant tin-plated terminals suitable for automated assembly.
Technical Context
This device operates as a single-phase, half-wave silicon rectifier optimized for 60Hz line-frequency applications with resistive or inductive loads. Its glass passivated die construction ensures stable performance under thermal cycling and humidity exposure.
The D4G-T exhibits low forward conduction loss (1.0V @ 1.0A) and tight reverse leakage control (5.0µA @ 25°C, 50µA @ 100°C), enabling reliable operation in ambient temperatures from –65°C to +150°C without derating below 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum peak reverse voltage before breakdown; defines safe AC input voltage rating (e.g., 280V RMS). |
| IO @ 75°C | 1.0 A - Continuous average forward current with leads held at ambient at 9.5mm from case; sets PCB trace and heatsinking requirements. |
| VFM @ 1.0A | 1.0 V - Forward voltage drop at rated DC output current; determines conduction loss (1.0W dissipation at full load). |
| IFSM | 30 A - Non-repetitive surge rating for 8.3ms half-sine; supports inrush current handling in transformer-coupled supplies. |
| trr | 2.0 µs - Reverse recovery time measured at IF=0.5A, IR=1A, Irr=0.25A; enables use in low-frequency switching (<10kHz) without excessive switching loss. |
| RθJA | 100 °C/W - Junction-to-ambient thermal resistance; requires ≥15mm² copper pad for safe 1.0A operation at 75°C ambient. |
Pinout & Package
Package: T-1 axial leaded plastic case (UL 94V-0), 2.60–3.20 mm body diameter, 25.40 mm minimum lead length, cathode identified by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward current entry | Connected to AC source or transformer secondary; must withstand peak inverse voltage during reverse bias. |
| Cathode | Forward current exit | Marked with band; connects to bulk capacitor or downstream regulator; carries full rectified DC current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Eliminates need for hermetic sealing while maintaining moisture resistance and long-term reliability in humid environments. |
| Lead-free, RoHS-compliant finish | Tin-plated terminals meet MIL-STD-202 solderability standards and support Pb-free reflow and wave soldering processes. |
| 100°C/W thermal resistance | Enables direct mounting on FR-4 PCBs without heatsinks for ≤1.0A continuous operation at ≤75°C ambient. |
| 2.0µs reverse recovery | Minimizes switching losses and EMI generation in 50/60Hz rectification, avoiding ringing in transformer-coupled designs. |
Applications
| AC-DC Power Adapters | Industrial Control Power Supplies |
|---|---|
Use Scenario: 12V/1A wall adapter converting 100–240V AC mains to regulated DC output. IC Role / Device Role / Timing Role: Primary-side bridge rectifier converting AC input to pulsating DC prior to bulk capacitance and regulation. Use Value: 400V VRRM safely handles 240V AC peaks (340V), while 1.0V VFM limits conduction loss to 1.0W at full load. | Use Scenario: DIN-rail mounted 24V DC power supply for PLC I/O modules operating in factory environments. IC Role / Device Role / Timing Role: Input rectifier in unregulated linear supply feeding series pass transistor and local LDOs. Use Value: Glass passivation ensures stability across –25°C to +70°C operating range and resists condensation-induced leakage. |
| LED Driver Input Stage | Appliance Motor Control Boards |
Use Scenario: Constant-current LED driver for commercial lighting, accepting universal AC input. IC Role / Device Role / Timing Role: First-stage rectifier feeding high-voltage buck converter; operates at 50/60Hz with minimal ripple injection. Use Value: 2.0µs trr prevents reverse recovery oscillation that could couple noise into sensitive current-sense circuitry. | Use Scenario: Embedded motor controller in washing machine main board powering auxiliary logic and relay drivers. IC Role / Device Role / Timing Role: Rectifier supplying unregulated 12–15V DC rail for microcontroller, optocouplers, and gate drivers. Use Value: 30A IFSM withstands repeated startup surges from pump and drum motor windings without degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar general-purpose rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4004-T | Same VRRM (400V), identical T-1 package, but higher VFM (1.1V @ 1A) and slower trr (3.0µs). | Suitable for cost-sensitive, non-noise-critical applications where 0.1V extra drop and 1µs longer recovery are acceptable. | Select when legacy compatibility or lowest unit cost is prioritized over efficiency and EMI performance. |
| ES1D | Surface-mount SMB package, same VRRM and IO, but faster trr (35ns) and lower VFM (0.95V); RθJA = 65°C/W. | Requires PCB redesign for SMT layout; better for high-density, thermally constrained designs with switching frequencies >1kHz. | Choose for new SMT-based designs needing improved thermal performance and reduced switching loss, not for through-hole replacement. |
Compared with 1N4004-T, D4G-T offers lower conduction loss and faster recovery for cleaner rectification; versus ES1D, it retains axial T-1 compatibility for legacy through-hole manufacturing but trades off thermal efficiency and high-frequency suitability.
Availability
D4G-T is available at Aetrix Electronics and suitable for AC-DC power adapters, industrial control power supplies, and LED driver input stages requiring stable component supply, long-lifecycle availability, and RoHS-compliant sourcing.
Supply support for D4G-T includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, serving automotive, industrial, computing, and consumer markets with high-reliability components.
The D1G–D7G series targets cost-effective, high-volume general-purpose rectification, emphasizing robustness, manufacturability, and compliance across global power supply standards.
FAQ
What is the maximum operating temperature for D4G-T?
The D4G-T supports continuous operation from –65°C to +150°C junction temperature. Its rated average forward current of 1.0A applies only at TA = 75°C with leads maintained at ambient at 9.5mm from the case; derating is required above this ambient temperature per Figure 1 in DS29001.
Can D4G-T be used in capacitive-input filter applications?
No - the datasheet explicitly states that for capacitive loads, the average rectified output current must be derated by 20%. This is due to increased peak current stress and elevated junction temperature caused by high crest-factor charging currents into bulk capacitors.
Is D4G-T compatible with lead-free soldering processes?
Yes - D4G-T features lead-free, RoHS-compliant tin-plated terminals qualified to MIL-STD-202, Method 208. It supports standard Pb-free reflow profiles (peak ~260°C) and wave soldering without delamination or solderability degradation.
How does the glass passivation benefit long-term reliability?
Glass passivation provides superior moisture barrier properties compared to organic passivants, preventing electrochemical migration and leakage current drift under high humidity and temperature cycling. This extends service life in industrial and outdoor power supply applications where environmental stress is significant.
D4G-T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- T1, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Standard
- Voltage - DC Reverse (Vr) (Max):
- 400 V
- Current - Average Rectified (Io):
- 1A
- Voltage - Forward (Vf) (Max) @ If:
- 1 V @ 1 A
- Speed:
- Standard Recovery >500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- 2 µs
- Current - Reverse Leakage @ Vr:
- 5 µA @ 400 V
- Capacitance @ Vr, F:
- 8pF @ 4V, 1MHz
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- T-1
- Operating Temperature - Junction:
- -65°C ~ 150°C
D4G-T FAQ
1.How can I place an order for D4G-T through Aetrix?
Please submit a Request for Quotation (RFQ) for D4G-T on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for D4G-T reliable?
The price and inventory of D4G-T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for D4G-T is usually 5 days.
3.What payment methods are accepted for D4G-T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for D4G-T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for D4G-T?
D4G-T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your D4G-T order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for D4G-T?
For technical support, including D4G-T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your D4G-T requirements.
6.How does Aetrix verify that D4G-T is sourced from the original manufacturer or authorized distributors?
All D4G-T products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that D4G-T meets industry standards.
7.What is the process for return or replacement of D4G-T?
All D4G-T units undergo pre-shipment inspection (PSI). If there is an issue with D4G-T, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The D4G-T part is unused and in its original packaging.
Return procedure for D4G-T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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