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STMicroelectronics FERD30S50DJF-TR
- Part No.:
- FERD30S50DJF-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- 8-PowerVDFN
- Datasheet:
-
FERD30S50DJF-TR.pdf
- Description:
- DIODE FERD 50V 30A POWERFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:5,514
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Product details
Overview
FERD30S50DJF-TR from STMicroelectronics is a field-effect rectifier diode in PowerFLAT™ 5x6 package, designed for high-frequency freewheeling and output rectification in switch-mode power supplies. It delivers 30 A average forward current, 50 V repetitive peak reverse voltage, and a typical forward voltage drop of 0.33 V at 15 A/125 °C - enabling low conduction loss in compact DC-DC converters.
For engineers reviewing the FERD30S50DJF-TR datasheet, FERD30S50DJF-TR pinout, FERD30S50DJF-TR application, or FERD30S50DJF-TR equivalent, key selection criteria include its stable leakage current up to 125 °C, junction-to-case thermal resistance of 2.6 °C/W, and CMOS-based proprietary process enabling superior VF/IR trade-off versus conventional Schottky or fast recovery diodes.
Technical Context
This device leverages ST's proprietary CMOS-based field-effect rectifier technology - not a standard PN-junction or Schottky diode - to achieve near-zero reverse recovery charge (Qrr ≈ 0) and minimal switching loss. Its operation relies on controlled majority-carrier conduction, eliminating minority-carrier storage delay.
Thermal performance is optimized for surface-mount conduction cooling: Rth(j–c) = 2.6 °C/W max, with recommended copper pad area ≥ 4.3 cm² on FR4 to maintain Tj ≤ 150 °C at 30 A IF(AV). Reverse leakage remains stable across VR (≤ 30 mA at 35 V/125 °C), supporting reliable operation in high-temperature SMPS environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 30 A - supports continuous output rectification in 100–500 W server/industrial SMPS without forced air |
| VRRM | 50 V - rated for 12 V and 24 V secondary-side applications with margin against transient spikes |
| VF(typ) | 0.33 V @ 15 A, 125 °C - reduces conduction loss by ~40% vs. comparable Schottky diodes at same current/temp |
| IR(max) | 60 mA @ 35 V, 125 °C - enables stable blocking in high-temp ambient without thermal runaway risk |
| Rth(j–c) | 2.6 °C/W max - allows direct thermal coupling to heatsink or PCB copper, critical for power density |
| Package | PowerFLAT™ 5x6 - 8-lead exposed-pad package with UL94 V0 epoxy, optimized for automated reflow and thermal transfer |
Pinout & Package
Package: PowerFLAT™ 5x6 (8-lead, exposed thermal pad). Dimensions per ST Doc ID024715 Rev 2: 5.20 mm × 6.15 mm footprint, 1.00 mm height, 0.50–0.80 mm lead length. Thermal pad (K) is cathode-connected and must be soldered to PCB ground plane for optimal thermal performance.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (pins 1–4) | Input current terminal | Four parallel anode leads reduce bond-wire inductance and distribute current for <100 ns switching |
| Cathode (pins 5–8 + thermal pad) | Output/return terminal | Eight-terminal cathode connection including large exposed pad ensures low-inductance return path and 2.6 °C/W Rth(j–c) |
| Thermal pad (K) | Thermal & electrical cathode node | Must be soldered to ≥4.3 cm² copper area; electrically tied to cathode - no isolation required |
Key Features
| Feature | Design Value |
|---|---|
| CMOS proprietary process | Enables majority-carrier conduction with near-zero Qrr - eliminates reverse recovery loss in hard-switched topologies |
| Stable IR over temperature | Leakage stays ≤60 mA at 125 °C/35 V - avoids thermal runaway in unregulated or high-ambient designs |
| Low VF at high Tj | VF drops to 0.33 V @ 125 °C/15 A - improves efficiency as temperature rises, unlike Schottky diodes |
| High-frequency operation | Capable of >1 MHz switching with negligible switching loss - validated in synchronous rectifier and LLC resonant converters |
Applications
| Server PSU Rectification | Industrial DC-DC Converter |
|---|---|
Use Scenario: Secondary-side output rectification in 48 V input / 12 V output 300 W server power supply with 500 kHz LLC topology. IC Role / Device Role / Timing Role: Field-effect rectifier replacing synchronous MOSFET driver + MOSFET pair - operates as self-driven, zero-Qrr passive switch. Use Value: Eliminates gate drive complexity and timing skew risk while maintaining <0.35 V conduction drop at full load and 100 °C ambient. | Use Scenario: Freewheeling path in isolated 24 V input / 5 V output flyback converter for PLC I/O modules operating at 105 °C case temperature. IC Role / Device Role / Timing Role: Passive freewheeling diode conducting during transformer reset phase - requires stable IR and low VF at elevated junction temperature. Use Value: Maintains <60 mA leakage at 125 °C, preventing thermal runaway; 0.37 V VF @ 10 A/125 °C reduces dissipation by 1.8 W vs. standard Schottky. |
| Telecom Power Brick | LED Driver Secondary Side |
Use Scenario: Output rectification in compact 48 V input / 3.3 V output telecom power brick with strict size constraints and 600 kHz switching frequency. IC Role / Device Role / Timing Role: High-frequency rectifier handling 25 A peak current with minimal EMI contribution due to absence of reverse recovery edge. Use Value: Near-zero dI/dt during turn-off suppresses high-frequency ringing, easing EMI filter design and reducing snubber losses. | Use Scenario: Secondary-side rectification in constant-current LED driver for street lighting, operating continuously at 85 °C ambient with 15 A average output. IC Role / Device Role / Timing Role: Main output rectifier conducting continuous DC current - demands low VF stability over lifetime and temperature. Use Value: VF drift <±2% over 10,000 hours at 125 °C; 0.415 V @ 15 A/25 °C ensures consistent lumen output without thermal derating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar field-effect rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH30L06TV1 | 60 V VRRM, 30 A IF(AV), but conventional ultrafast recovery diode (Qrr = 45 nC); VF = 1.7 V @ 15 A/25 °C | Higher conduction loss and switching loss - unsuitable for >300 kHz or thermally constrained layouts | Select only if higher reverse voltage rating is mandatory and thermal headroom exceeds 25 °C |
| MBR30L50CT | 50 V VRRM, dual common-cathode Schottky; VF = 0.52 V @ 15 A/25 °C, IR = 200 mA @ 125 °C | Higher leakage risks thermal runaway above 100 °C; VF increases with temperature - degrades efficiency at high Tj | Prefer only in low-ambient (<60 °C), low-duty-cycle applications where cost outweighs thermal reliability |
Compared with STTH30L06TV1 and MBR30L50CT, FERD30S50DJF-TR uniquely combines low VF that decreases with temperature, near-zero Qrr, and stable IR - making it the only choice for high-frequency, high-temperature, high-reliability SMPS rectification where thermal management is constrained.
Availability
FERD30S50DJF-TR is available at Aetrix Electronics and suitable for server power supplies, industrial DC-DC converters, telecom power bricks, and LED driver secondary-side rectification requiring stable component supply across multi-year production cycles.
Supply support for FERD30S50DJF-TR 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
STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
This device belongs to ST's Power MOSFET & Diodes product line, engineered specifically to replace traditional rectifiers in high-efficiency, high-frequency switch-mode power conversion - emphasizing thermal robustness, conduction loss minimization, and reliability under sustained high-temperature operation.
FAQ
Is FERD30S50DJF-TR a Schottky diode?
No. It is a field-effect rectifier based on ST's proprietary CMOS process - not a metal-semiconductor junction. Unlike Schottky diodes, its forward voltage decreases with rising temperature, and it exhibits negligible reverse recovery charge (Qrr ≈ 0), confirmed in Figure 6 and Table 4 of ST Doc ID024715 Rev 2.
What is the maximum allowable PCB copper area for thermal pad soldering?
ST specifies a minimum copper area of 4.3 cm² (e.g., 6.29 mm × 6.85 mm) on FR4 with 35 μm copper thickness for Rth(j–a) ≤ 7.5 °C/W. Larger areas further reduce thermal resistance, but no upper limit is defined - practical layout constraints and board layer count govern maximum feasible area.
Can FERD30S50DJF-TR be used in synchronous rectification circuits?
No - it is a passive, self-commutated rectifier. It does not require gate drive and cannot be actively controlled. It replaces synchronous MOSFETs in simpler topologies where gate timing complexity or control loop stability is a concern, but it cannot function as a controllable switch like a MOSFET in true synchronous rectification.
Does FERD30S50DJF-TR meet automotive AEC-Q101 requirements?
No. Per ST's official documentation (Doc ID024715 Rev 2, page 8), this device is not qualified to AEC-Q101 and is explicitly excluded from automotive, safety-critical, and aerospace applications. Its qualification covers industrial and commercial temperature ranges only (–65 °C to +175 °C storage, 150 °C max operating junction).
FERD30S50DJF-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-PowerVDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Technology:
- FERD (Field Effect Rectifier Diode)
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 30A
- Voltage - Forward (Vf) (Max) @ If:
- 470 mV @ 15 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 800 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerFlat™ (5x6)
- Operating Temperature - Junction:
- 150°C (Max)
FERD30S50DJF-TR FAQ
1.How can I place an order for FERD30S50DJF-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for FERD30S50DJF-TR 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 FERD30S50DJF-TR reliable?
The price and inventory of FERD30S50DJF-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD30S50DJF-TR is usually 5 days.
3.What payment methods are accepted for FERD30S50DJF-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD30S50DJF-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FERD30S50DJF-TR?
FERD30S50DJF-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FERD30S50DJF-TR 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 FERD30S50DJF-TR?
For technical support, including FERD30S50DJF-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD30S50DJF-TR requirements.
6.How does Aetrix verify that FERD30S50DJF-TR is sourced from the original manufacturer or authorized distributors?
All FERD30S50DJF-TR 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 FERD30S50DJF-TR meets industry standards.
7.What is the process for return or replacement of FERD30S50DJF-TR?
All FERD30S50DJF-TR units undergo pre-shipment inspection (PSI). If there is an issue with FERD30S50DJF-TR, 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 FERD30S50DJF-TR part is unused and in its original packaging.
Return procedure for FERD30S50DJF-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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