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STMicroelectronics FERD15S50DJF-TR
- Part No.:
- FERD15S50DJF-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- 8-PowerVDFN
- Datasheet:
-
FERD15S50DJF-TR.pdf
- Description:
- DIODE FERD 50V 15A POWERFLAT
- Quantity:
- Payment:
- Shipping:
Inventory:4,844
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Product details
Overview
FERD15S50DJF-TR from STMicroelectronics is a 50 V, 15 A field-effect rectifier diode in PowerFLAT™ 5x6 package, optimized for high-frequency freewheeling and output rectification in SMPS. It delivers typ. 0.48 V forward voltage at 15 A/25 °C, 2.8 °C/W junction-to-case thermal resistance, and stable 40 mA leakage at 125 °C/50 V - enabling compact, efficient DC/DC converters and battery chargers.
For engineers reviewing the FERD15S50DJF-TR datasheet, FERD15S50DJF-TR pinout, FERD15S50DJF-TR application, or FERD15S50DJF-TR equivalent, key selection criteria include VF/IR trade-off at high temperature, thermal performance on PCB copper area, conduction loss modeling (P = 0.25×IF(AV) + 0.02×IF²(RMS)), and ECOPACK®2 compliance for RoHS-compliant production.
Technical Context
This device employs ST's patented field-effect rectifier process to decouple forward voltage and reverse leakage, achieving superior VF/IR balance versus conventional Schottky or fast recovery diodes. Its low Rth(j-c) of 2.8 °C/W and thermally robust PowerFLAT™ 5x6 construction support high-power-density layouts without external heatsinks.
Designed for unidirectional conduction in hard-switched and resonant topologies, it operates up to 150 °C junction temperature with pulse-rated surge current of 80 A (10 ms sine), and exhibits minimal capacitance variation (100–1000 pF at 1 MHz) across 0–30 V reverse bias - critical for EMI control in high-frequency SMPS.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 15 A average forward current - supports continuous output rectification in 60–100 W DC/DC converters |
| VRRM | 50 V repetitive peak reverse voltage - suitable for 36 V nominal bus systems with safety margin |
| VF(typ.) | 0.48 V at 15 A, 25 °C - reduces conduction loss vs. standard Schottky diodes (typically ≥0.55 V) |
| IR(max) | 40 mA at 125 °C, 50 V - enables stable operation in hot environments without thermal runaway |
| Rth(j-c) | 2.8 °C/W - allows direct PCB copper thermal path; 7 cm² copper area achieves ~5 °C/W Rth(j-a) |
| IFS M | 80 A non-repetitive surge - withstands startup inrush and transient overloads in charger applications |
| Package | PowerFLAT™ 5x6 - surface-mount, bottom-side thermal pad, UL 94 V0 epoxy, ECOPACK®2 compliant |
Pinout & Package
PowerFLAT™ 5x6 is a 2-terminal surface-mount package with exposed thermal pad on underside. Anode and cathode are assigned to opposite sides of the molded body; thermal pad is electrically connected to cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Input terminal for forward conduction | Connected to switching node (e.g., MOSFET drain) in freewheeling path; must handle full IF(AV) and IFSM |
| Cathode | Output terminal / common reference | Electrically tied to thermal pad; routed to output rail or ground plane for low-inductance return path |
| Thermal Pad | Thermal interface / cathode extension | Requires minimum 3.34 × 3.70 mm copper area (FR4, 35 µm Cu); solder mask defined for optimal thermal transfer |
Key Features
| Feature | Design Value |
|---|---|
| ST patented field-effect rectifier process | Enables independent optimization of VF and IR - avoids classic Schottky trade-off between low VF and high-temperature leakage |
| Stable leakage over reverse voltage | IR remains ≤40 mA up to 50 V at 125 °C - eliminates thermal runaway risk in high-temp ambient designs |
| Low forward voltage drop | 0.48 V typ. at 15 A/25 °C - cuts conduction loss by ~15% vs. comparable 50 V Schottky diodes |
| High-frequency operation | Low junction capacitance (100–1000 pF) and fast recovery enable use in >500 kHz SMPS without excessive switching loss |
| ECOPACK®2 compliance | Meets RoHS, halogen-free, and lead-free reflow requirements - qualified for automotive and industrial production |
Applications
| Set-Top Box Power Supply | Battery Charger Output Stage |
|---|---|
Use Scenario: Secondary-side synchronous rectification replacement in 12 V/3 A isolated flyback converter. IC Role / Device Role / Timing Role: Freewheeling rectifier during MOSFET off-time; conducts 15 A average current with minimal voltage drop. Use Value: Reduces output rectifier loss by 0.7 W vs. standard Schottky, lowering case temperature by ~8 °C at full load. | Use Scenario: Output rectification in 24 V/2 A Li-ion charger with foldback current limiting. IC Role / Device Role / Timing Role: Unidirectional current path from transformer secondary to battery filter capacitor; handles 80 A surge during cold-start. Use Value: Maintains <0.5 V dropout under 15 A load while limiting IR-induced thermal drift - improves charge regulation accuracy. |
| DC/DC Converter Freewheeling | Industrial 48 V Input Module |
Use Scenario: Freewheeling path in 48 V input, 5 V/10 A buck converter operating at 300 kHz. IC Role / Device Role / Timing Role: Provides low-loss current recirculation during high-side switch off-phase; rated for 150 °C junction operation. Use Value: Enables 92% efficiency at full load due to 0.42 V VF at 10 A/125 °C - outperforms fast recovery diodes by 1.2% absolute. | Use Scenario: Output rectification in telecom-grade 48 V–12 V intermediate bus converter with 150 °C ambient rating. IC Role / Device Role / Timing Role: High-reliability rectifier with validated 40 mA IR at 125 °C - prevents thermal runaway in sealed enclosures. Use Value: Eliminates need for derating or forced air cooling; supports 10-year field life in fanless industrial modules. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar high-efficiency rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STPS1545C | 45 V VRRM, 15 A IF(AV), Schottky; VF = 0.52 V @ 15 A/25 °C, IR = 1.2 mA @ 125 °C | Lower leakage but lower VRRM - unsuitable for 48 V bus designs requiring 50 V margin | Select when lowest IR dominates and VRRM margin is not required |
| MBR1550CT | 50 V VRRM, dual common-cathode TO-220; VF = 0.75 V @ 15 A/25 °C, Rth(j-c) = 3.5 °C/W | Higher VF and larger footprint - increases conduction loss and board space vs. PowerFLAT™ 5x6 | Select only if through-hole assembly or dual-diode configuration is mandatory |
Compared with STPS1545C and MBR1550CT, FERD15S50DJF-TR uniquely balances 50 V rating, sub-0.5 V VF, and <40 mA IR at 125 °C in a thermally optimized 5x6 mm SMT package - making it optimal for space-constrained, high-temperature SMPS where both efficiency and reliability are critical.
Availability
FERD15S50DJF-TR is available at Aetrix Electronics and suitable for set-top box power supplies, battery charger output stages, and DC/DC converter freewheeling circuits requiring stable component supply, high thermal reliability, and RoHS-compliant manufacturing.
Supply support for FERD15S50DJF-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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
FERD15S50DJF-TR belongs to ST's Power Rectifiers product line, engineered specifically for high-efficiency, high-temperature switching power conversion - emphasizing VF/IR optimization, thermal robustness, and surface-mount manufacturability.
FAQ
What is the maximum allowable junction temperature for continuous operation?
The FERD15S50DJF-TR has a maximum operating junction temperature of +150 °C, verified under conditions where (dPtot/dTj) < (1/Rth(j-a)) to prevent thermal runaway. This rating applies with proper PCB copper area (≥7 cm²) and no external heatsink, per AN5046 layout guidelines.
How does its forward voltage compare at elevated temperature?
At 125 °C and 15 A, VF is 0.41–0.45 V (typ./max.), which is lower than most Schottky diodes at same conditions. This negative temperature coefficient improves thermal stability and reduces conduction loss in hot environments.
Is the thermal pad electrically isolated or connected to a terminal?
The PowerFLAT™ 5x6 thermal pad is electrically connected to the cathode terminal. Layout must ensure the pad is routed to the cathode net - not floating or grounded independently - to avoid short circuits and maintain specified Rth(j-c) = 2.8 °C/W.
Can it replace standard Schottky diodes in existing designs without layout changes?
No - the PowerFLAT™ 5x6 footprint differs significantly from SO-8 or TO-252. A new PCB layout with the recommended 3.34 × 3.70 mm thermal pad and 0.5 mm solder mask opening is required to achieve rated thermal performance and reliability.
FERD15S50DJF-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- 8-PowerVDFN
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- FERD (Field Effect Rectifier Diode)
- Voltage - DC Reverse (Vr) (Max):
- 50 V
- Current - Average Rectified (Io):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 480 mV @ 10 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 650 µA @ 50 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- PowerFlat™ (5x6)
- Operating Temperature - Junction:
- 150°C (Max)
FERD15S50DJF-TR FAQ
1.How can I place an order for FERD15S50DJF-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for FERD15S50DJF-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 FERD15S50DJF-TR reliable?
The price and inventory of FERD15S50DJF-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD15S50DJF-TR is usually 5 days.
3.What payment methods are accepted for FERD15S50DJF-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD15S50DJF-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FERD15S50DJF-TR?
FERD15S50DJF-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FERD15S50DJF-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 FERD15S50DJF-TR?
For technical support, including FERD15S50DJF-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD15S50DJF-TR requirements.
6.How does Aetrix verify that FERD15S50DJF-TR is sourced from the original manufacturer or authorized distributors?
All FERD15S50DJF-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 FERD15S50DJF-TR meets industry standards.
7.What is the process for return or replacement of FERD15S50DJF-TR?
All FERD15S50DJF-TR units undergo pre-shipment inspection (PSI). If there is an issue with FERD15S50DJF-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 FERD15S50DJF-TR part is unused and in its original packaging.
Return procedure for FERD15S50DJF-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FERD15S50DJF-TR Tags
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