My Inquiry
My Account
STMicroelectronics FERD15S50SB-TR
;;2.jpg)
- Part No.:
- FERD15S50SB-TR
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- Datasheet:
-
FERD15S50SB-TR.pdf
- Description:
- DIODE FERD 50V 15A DPAK
- Quantity:
- Payment:
- Shipping:
Inventory:12,320
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
FERD15S50SB-TR from STMicroelectronics is a 50 V, 15 A average forward current field-effect rectifier diode in DPAK package, featuring 0.31 V typical forward voltage at 15 A and 125 °C, stable leakage current up to 40 mA at 125 °C/50 V, and junction-to-case thermal resistance of 1.4 °C/W - deployed in high-frequency AC-DC flyback and LLC resonant power supplies.
For engineers reviewing the FERD15S50SB-TR datasheet, FERD15S50SB-TR pinout, FERD15S50SB-TR application, or FERD15S50SB-TR equivalent, key selection criteria include forward voltage drop at rated current, reverse leakage behavior across temperature, thermal resistance under conduction cooling, and DPAK footprint compatibility with FR4 PCB copper area requirements.
Technical Context
This device uses ST's proprietary field-effect rectifier process to optimize the VF/IR trade-off on silicon, enabling lower conduction loss than conventional Schottky diodes while maintaining superior reverse leakage stability over temperature. It operates reliably up to 150 °C junction temperature and supports high-frequency switching (e.g., >100 kHz) due to low junction capacitance and fast recovery characteristics.
The DPAK package provides direct thermal path from die to heatsink via the exposed tab, with Rth(j-c) = 1.4 °C/W and recommended minimum 90 cm² copper surface for ambient thermal management. Its surge rating of 100 A (10 ms sinusoidal) supports inrush and transient handling in offline SMPS designs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 15 A - maximum continuous DC forward current at TC = 130 °C, defining steady-state power stage sizing |
| VRRM | 50 V - peak repetitive reverse voltage rating, sets maximum clamping/reverse blocking capability |
| VF(typ.) | 0.31 V at IF = 15 A, Tj = 125 °C - directly determines conduction loss in freewheeling paths |
| IR(max) | 40 mA at VR = 50 V, Tj = 125 °C - quantifies leakage-induced standby power penalty in high-temp operation |
| Rth(j-c) | 1.4 °C/W - enables thermal design using case temperature as proxy for junction temperature under conduction cooling |
| IFS M | 100 A (10 ms sinusoidal) - supports short-duration overload without bond wire failure |
| Tj(max) | 150 °C - defines maximum allowable junction temperature for reliability-limited lifetime estimation |
Pinout & Package
DPAK (TO-252) package with three terminals: anode (pin 1), cathode (pin 2), and electrically connected tab (pin 3, cathode). The exposed metal tab serves as the primary thermal and electrical cathode connection, requiring soldered copper area ≥90 cm² on FR4 for Rth(j-a) ≤ 30 °C/W.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Main current entry point; connects to transformer secondary or switch node in flyback/freewheeling topology |
| Pin 2 | Cathode | Current exit terminal; routed to output capacitor or ground return path |
| Tab (Pin 3) | Cathode (electrically tied to Pin 2) | Primary thermal interface; must be soldered to large copper pour for effective heat dissipation |
Key Features
| Feature | Design Value |
|---|---|
| Field-effect rectifier architecture | Enables 0.31 V VF at 15 A/125 °C - reduces conduction loss by ~30% vs. standard Schottky diodes at same rating |
| Stable IR over temperature and voltage | Leakage remains ≤40 mA at 50 V/125 °C - avoids thermal runaway in high-ambient environments |
| DPAK thermal performance | Rth(j-c) = 1.4 °C/W with direct tab mounting - allows accurate junction temperature estimation from case measurement |
| ECOPACK®2 compliance | Halogen-free, RoHS-compliant epoxy meets UL 94 V0 - satisfies environmental requirements for industrial and consumer end equipment |
Applications
| AC-DC Adapter Power Supply | Server PSU Secondary Side Rectification |
|---|---|
Use Scenario: 65 W universal-input adapter with 100–240 VAC input and 20 V/3.25 A output using flyback topology. IC Role / Device Role / Timing Role: Freewheeling rectifier on secondary side, conducting during MOSFET off-time to transfer energy to output capacitor. Use Value: 0.31 V VF at full load reduces secondary-side conduction loss by 0.46 W vs. legacy Schottky, improving efficiency from 87.2% to 88.1% at 230 VAC/50% load. | Use Scenario: 12 V/60 A output rail in 80 PLUS Titanium server PSU using synchronous rectification-assisted LLC resonant converter. IC Role / Device Role / Timing Role: Auxiliary freewheeling diode paralleled with SR MOSFET to handle reverse recovery and dead-time conduction. Use Value: Stable 40 mA IR at 125 °C prevents thermal drift-induced current imbalance between parallel devices, ensuring reliable current sharing during transient load steps. |
| Industrial Motor Drive DC Bus Clamp | Telecom DC-DC Intermediate Bus Converter |
Use Scenario: 48 V input, 24 V/10 A output isolated forward converter in variable-frequency drive auxiliary supply. IC Role / Device Role / Timing Role: Output rectifier operating at 200 kHz switching frequency with δ = 0.5 duty cycle. Use Value: Low junction capacitance (<1000 pF at 0 V) minimizes capacitive turn-on loss during hard-switched transitions, reducing EMI generation near 200 MHz. | Use Scenario: 48 V to 12 V intermediate bus converter in 5G base station radio unit with strict 150 °C max board temperature requirement. IC Role / Device Role / Timing Role: Primary output rectifier in phase-shifted full-bridge topology, mounted on heatsink via DPAK tab. Use Value: Rth(j-c) = 1.4 °C/W enables junction temperature control within 150 °C limit using only 15 cm² heatsink area, eliminating need for forced air cooling. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar field-effect rectifier diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH1605D | 50 V, 16 A, VF = 0.75 V @ 15 A/125 °C - higher VF, standard ultrafast recovery structure | Higher conduction loss; suitable where leakage sensitivity is low but EMI immunity is critical | Select when reverse recovery softness matters more than efficiency, e.g., in noisy industrial environments |
| MBR1650CT | 50 V, 16 A dual common-cathode Schottky; VF = 0.55 V @ 15 A/25 °C - no rated IR spec above 100 °C | Lacks high-temperature leakage specification; unsuitable for >105 °C ambient designs | Choose only for cost-sensitive, low-ambient-temperature applications where thermal derating is not required |
Compared with STTH1605D and MBR1650CT, FERD15S50SB-TR delivers lowest conduction loss at elevated temperature and verified leakage stability up to 150 °C, making it optimal for thermally constrained, high-efficiency power supplies where long-term reliability under thermal stress is mandatory.
Availability
FERD15S50SB-TR is available at Aetrix Electronics and suitable for AC-DC adapters, server PSUs, industrial motor drives, and telecom DC-DC converters requiring stable component supply with tight thermal and efficiency specifications.
Supply support for FERD15S50SB-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, Switzerland, designing and manufacturing analog, microcontroller, power, and sensor solutions for industrial, automotive, and consumer markets.
FERD15S50SB-TR belongs to ST's Field-Effect Rectifier (FERD) product line, engineered specifically to replace Schottky diodes in high-frequency, high-temperature power conversion where VF/IR trade-off limits traditional devices.
FAQ
What is the maximum allowable case temperature for continuous operation?
The device is rated for IF(AV) = 15 A at TC = 130 °C, meaning sustained case temperature must not exceed 130 °C under full-load conditions. Exceeding this requires derating per Figure 2 in the datasheet, which shows IF(AV) drops to ~10.5 A at TC = 150 °C. Thermal design must ensure case temperature stays within this limit using the specified copper area and airflow conditions.
Is the DPAK tab electrically isolated from the leads?
No - the DPAK tab is internally connected to Pin 2 (cathode) and forms part of the cathode terminal. It must be electrically tied to the cathode net on the PCB and cannot be used as a floating thermal pad. Isolation requires external insulation such as Kapton tape or ceramic washer if mounting to a grounded heatsink.
Can FERD15S50SB-TR replace a standard Schottky diode in an existing design?
Yes, provided layout accommodates DPAK's 6.22 mm × 6.73 mm outline and thermal pad requirements. Electrical replacement is viable due to identical VRRM and higher IF(AV), but note its lower VF improves efficiency while its higher IR at 125 °C demands verification of standby power and thermal runaway margins in high-ambient designs.
Does this diode require a snubber circuit in high-frequency operation?
Not typically - its field-effect structure yields soft reverse recovery and low stored charge (Qrr not specified, but implied <100 nC from VF/IR profile), minimizing voltage overshoot. However, a small RC snubber (e.g., 10 Ω + 100 pF) may still be needed at >500 kHz to damp ringing caused by layout parasitics, especially when paired with GaN switches.
FERD15S50SB-TR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-252-3, DPAK (2 Leads + Tab), SC-63
- 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:
- 490 mV @ 15 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:
- DPAK
- Operating Temperature - Junction:
- 150°C (Max)
FERD15S50SB-TR FAQ
1.How can I place an order for FERD15S50SB-TR through Aetrix?
Please submit a Request for Quotation (RFQ) for FERD15S50SB-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 FERD15S50SB-TR reliable?
The price and inventory of FERD15S50SB-TR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD15S50SB-TR is usually 5 days.
3.What payment methods are accepted for FERD15S50SB-TR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD15S50SB-TR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FERD15S50SB-TR?
FERD15S50SB-TR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FERD15S50SB-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 FERD15S50SB-TR?
For technical support, including FERD15S50SB-TR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD15S50SB-TR requirements.
6.How does Aetrix verify that FERD15S50SB-TR is sourced from the original manufacturer or authorized distributors?
All FERD15S50SB-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 FERD15S50SB-TR meets industry standards.
7.What is the process for return or replacement of FERD15S50SB-TR?
All FERD15S50SB-TR units undergo pre-shipment inspection (PSI). If there is an issue with FERD15S50SB-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 FERD15S50SB-TR part is unused and in its original packaging.
Return procedure for FERD15S50SB-TR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FERD15S50SB-TR Tags
-
1N4448X-TP
Micro Commercial Co
-
1N4148WX-TP
Micro Commercial Co
-
1N4148TR
onsemi
-
MMSD4148T1G
onsemi
-
MMBD914LT3G
onsemi
-
BAS16HT1G
onsemi
-
1N914BWT
onsemi
-
BAS21LT1G
onsemi
-
LL4148
onsemi
-
BAS16LT1G
onsemi
-
MMSD914T1G
onsemi
-
BAV21W-7-F
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
