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Diodes Incorporated DF04M
- Part No.:
- DF04M
- Manufacturer:
- Diodes Incorporated
- Category:
- Bridge Rectifiers
- Package:
- 4-EDIP (0.300", 7.62mm)
- Datasheet:
-
DF04M.pdf
- Description:
- BRIDGE RECT 1PHASE 400V 1A DFM
- Quantity:
- Payment:
- Shipping:
Inventory:22,473
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Product details
Overview
DF04M from Diodes Incorporated is a 1.0A standard recovery bridge rectifier with 400V maximum repetitive peak reverse voltage (VRRM), 1.1V max forward voltage at 1.0A, and 10µA max reverse leakage at 25°C. It features glass-passivated die construction, 50A non-repetitive surge capability, and is optimized for PCB-mounted AC/DC front-end conversion in industrial power supplies.
For engineers reviewing the DF04M datasheet, DF04M pinout, DF04M application, or DF04M equivalent, this device is selected for cost-sensitive, medium-voltage rectification where thermal resistance (RθJA = 40°C/W) and UL recognition (E364304) are critical in board-level reliability validation.
Technical Context
This discrete bridge rectifier integrates four silicon diodes in a single DF-M molded plastic package with bright tin-plated leads. Its standard recovery characteristic (trr not specified but implied by "standard recovery" classification per Diodes' product family definition) supports line-frequency (50/60Hz) operation without significant switching loss concerns.
The device operates across –55°C to +150°C junction temperature range and delivers 1.0A average rectified output current at +40°C ambient. Its 10.4 A²s I²t rating ensures robustness against short-duration line surges typical in mains-connected equipment.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 400 V - Maximum reverse voltage the bridge withstands continuously without breakdown; defines usable input AC voltage range (e.g., ≤280V RMS). |
| IO | 1.0 A @ +40°C - Average DC output current sustainable on standard PCB layout; derates above ambient. |
| VF Max | 1.1 V @ 1.0A - Forward drop per conducting path; determines conduction loss (1.1W at full load) and thermal design margin. |
| IR Max | 10 µA @ 25°C - Reverse leakage per half-bridge leg; impacts standby power and high-impedance sensing accuracy. |
| IFSM | 50 A (8.3 ms half-sine) - Peak surge current handling; enables compatibility with NTC-less inrush designs or lightning-induced transients. |
| RθJA | 40 °C/W - Junction-to-ambient thermal resistance on 5.0 mm² copper pad; sets minimum heatsinking requirement for continuous 1A operation. |
| Package | DF-M - Surface-mountable 4-pin molded plastic package (7.4–7.9 mm × 6.2–6.5 mm × 8.13–8.51 mm); RoHS-compliant, UL Recognized (E364304). |
Pinout & Package
DF-M package is a compact, surface-mount bridge rectifier housing four internal diodes in a single-phase full-wave configuration. Terminals are arranged as AC1, AC2, +DC, and –DC with polarity marked on case top.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| AC1 | Input AC Terminal 1 | One AC input node; connects to live/phase side of transformer secondary or AC line. |
| AC2 | Input AC Terminal 2 | Second AC input node; completes full-wave bridge input path with AC1. |
| +DC | Positive DC Output | Anode of output diode pair; delivers rectified positive rail to bulk capacitor or regulator input. |
| –DC | Negative DC Output / Common Return | Cathode of output diode pair; serves as circuit ground reference and return path for DC load current. |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated die | Enhances long-term reliability under humidity and thermal cycling; eliminates need for conformal coating in industrial environments. |
| UL Recognized Component (E364304) | Validates safety compliance for end-equipment certification (e.g., IEC 62368-1), reducing time-to-market for regulated power supplies. |
| Lead-free & RoHS 3 compliant | Meets EU Directive 2015/863/EU; enables global shipment without hazardous substance restrictions or reporting overhead. |
| 50A surge rating (8.3 ms) | Supports direct connection to unfiltered AC sources without external inrush limiters, simplifying BOM and board layout. |
Applications
| Industrial AC/DC Power Supplies | Appliance Motor Control Boards |
|---|---|
Use Scenario: Rectifying 115/230V AC mains to DC bus for switch-mode power supply input stages in PLCs and motor drives. IC Role / Device Role / Timing Role: Primary AC-to-DC conversion element; defines input stage efficiency, thermal footprint, and surge immunity. Use Value: 400V VRRM and 50A IFSM enable direct interface with 230VAC ±10% inputs while maintaining margin for line spikes. |
Use Scenario: Converting transformer-derived AC to DC for control logic and gate driver supplies in washing machine or HVAC fan modules. IC Role / Device Role / Timing Role: Off-line rectifier feeding low-power auxiliary rails; operates at 50/60Hz with minimal EMI generation. Use Value: Low 1.1V VF reduces heat rise in confined enclosures; UL recognition satisfies appliance safety standards (IEC 60335-1). |
| LED Driver Input Stages | Legacy Equipment Power Retrofits |
Use Scenario: Rectifying AC input prior to buck or flyback controller ICs in commercial LED streetlight drivers. IC Role / Device Role / Timing Role: Front-end bridge providing stable DC bus; interfaces directly with PFC or non-PFC controllers. Use Value: 1.0A IO rating supports up to ~12W output at 85–265VAC; DF-M footprint allows drop-in replacement of legacy bridges. |
Use Scenario: Replacing obsolete bridge rectifiers in field-service repairs of medical monitors or test equipment with aging power sections. IC Role / Device Role / Timing Role: Direct functional replacement for discontinued 1A/400V bridges; maintains identical pinout and thermal profile. Use Value: RoHS-compliant and UL-recognized status meets modern regulatory requirements without redesigning PCB layout. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar bridge rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| GBU4K (ON Semiconductor) | Same 400V VRRM, 1.0A IO, but GBU package (larger, through-hole); RθJA = 35°C/W vs. DF04M's 40°C/W. | Requires PCB hole drilling and wave soldering; unsuitable for pure SMT lines. | Select when mechanical robustness or higher surge margin (60A IFSM) outweighs SMT compatibility. |
| MB6S (Vishay) | Same DF-M footprint and 400V rating, but lower IFSM (30A) and higher VF (1.2V typ); RoHS-compliant but not UL recognized. | Lacks UL file number; may require re-certification in safety-critical end equipment. | Select only for cost-sensitive, non-certified consumer applications where UL recognition is not mandated. |
Compared with GBU4K and MB6S, DF04M uniquely combines SMT-compatible DF-M packaging, UL recognition, and 50A surge rating-making it optimal for new industrial designs requiring both regulatory compliance and board-level manufacturability.
Availability
DF04M is available at Aetrix Electronics and suitable for industrial AC/DC power supplies, appliance motor control boards, and LED driver input stages requiring stable component supply, long-lifecycle support, and consistent parametric performance across production batches.
Supply support for DF04M 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, with design, manufacturing, and sales operations across Asia, Europe, and North America.
DF04M belongs to Diodes' standard recovery bridge rectifier product line, engineered specifically for reliable, low-cost AC/DC conversion in cost-sensitive industrial and consumer power applications.
FAQ
What is the maximum operating temperature for DF04M?
The DF04M has a specified junction temperature range of –55°C to +150°C and a storage temperature range matching that span. Its thermal resistance (RθJA = 40°C/W) means sustained 1.0A operation requires careful PCB copper area design to avoid exceeding +150°C junction under worst-case ambient conditions.
Is DF04M suitable for use in automotive applications?
DF04M is not AEC-Q101 qualified and is not intended for automotive use. Diodes explicitly states that automotive-grade parts require separate qualification (AEC-Q101), PPAP capability, and IATF 16949 manufacturing-none of which apply to DF04M per its datasheet and ordering information.
Does DF04M have a specified reverse recovery time (trr)?
No, the DS21201 datasheet does not specify reverse recovery time. The device is classified as a "standard recovery" bridge rectifier, indicating trr is intentionally not optimized-typically >500 ns-and suited for 50/60Hz line-frequency applications, not high-frequency switching.
Can DF04M replace DF02M or DF06M in an existing design?
DF04M shares identical DF-M package, pinout, and thermal characteristics with DF02M (200V) and DF06M (600V), but differs in VRRM. Substitution is electrically safe only if the peak reverse voltage in the circuit remains ≤400V; using DF04M in a 600V-design risks catastrophic failure during overvoltage events.
DF04M Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Diodes Incorporated
- Series:
- -
- Package/Case:
- 4-EDIP (0.300", 7.62mm)
- Packaging:
- Tube
- Product Status:
- Active
- Diode Type:
- Single Phase
- Technology:
- Standard
- Voltage - Peak Reverse (Max):
- 400 V
- Current - Average Rectified (Io):
- 1 A
- Voltage - Forward (Vf) (Max) @ If:
- 1.1 V @ 1 A
- Current - Reverse Leakage @ Vr:
- 10 µA @ 400 V
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DFM
DF04M FAQ
1.How can I place an order for DF04M through Aetrix?
Please submit a Request for Quotation (RFQ) for DF04M 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 DF04M reliable?
The price and inventory of DF04M are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for DF04M is usually 5 days.
3.What payment methods are accepted for DF04M?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for DF04M transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for DF04M?
DF04M orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your DF04M 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 DF04M?
For technical support, including DF04M datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your DF04M requirements.
6.How does Aetrix verify that DF04M is sourced from the original manufacturer or authorized distributors?
All DF04M 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 DF04M meets industry standards.
7.What is the process for return or replacement of DF04M?
All DF04M units undergo pre-shipment inspection (PSI). If there is an issue with DF04M, 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 DF04M part is unused and in its original packaging.
Return procedure for DF04M:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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