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STMicroelectronics FERD20M60ST
- Part No.:
- FERD20M60ST
- Manufacturer:
- STMicroelectronics
- Category:
- Single Diodes
- Package:
- TO-220-3
- Datasheet:
-
FERD20M60ST.pdf
- Description:
- DIODE FERD 60V 20A TO220
- Quantity:
- Payment:
- Shipping:
Inventory:1,117
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Product details
Overview
FERD20M60ST from STMicroelectronics is a field-effect rectifier diode in TO-220AB package, designed for high-frequency freewheeling and output rectification in switch-mode power supplies. It delivers 20 A average forward current, 60 V repetitive peak reverse voltage, 0.30 V typical forward voltage at 125 °C/5 A, and operates up to +175 °C junction temperature.
For engineers reviewing the FERD20M60ST datasheet, FERD20M60ST pinout, FERD20M60ST application, or FERD20M60ST equivalent, this device is selected for low-conduction-loss, thermally robust secondary-side rectification where stable leakage under bias and minimal VF drift across temperature are critical.
Technical Context
This device uses ST's proprietary field-effect rectifier process to decouple forward voltage (VF) and reverse leakage (IR), achieving superior VF/IR trade-off versus conventional Schottky or fast recovery diodes. Its 0.30–0.56 V VF range (dependent on IF and Tj) and <30 mA IR at 125 °C/VRRM enable efficient operation in 100–500 kHz SMPS topologies.
Thermal design is supported by a maximum junction-to-case thermal resistance of 1.6 °C/W and rated for continuous operation at Tj = 175 °C with proper heatsinking. The TO-220AB package provides direct conduction cooling and mechanical compatibility with standard mounting hardware (0.55 N·m recommended torque).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| IF(AV) | 20 A - supports sustained output rectification in 100–300 W AC/DC adapters and DC/DC converters |
| VRRM | 60 V - suitable for 48 V bus systems and synchronous rectifier replacement in low-voltage secondary-side applications |
| VF(typ) | 0.30 V @ 5 A, 125 °C - reduces conduction loss by ~40% vs. standard fast recovery diodes at same current |
| IR(max) | 30 mA @ 125 °C, VRRM - ensures stable blocking performance without thermal runaway in high-temp environments |
| Rth(j-c) | 1.6 °C/W max - enables 27.5 W dissipation with ≤44 K rise from case to junction at steady state |
| Tj(max) | +175 °C - allows operation in sealed industrial power modules without derating below ambient 85 °C |
Pinout & Package
Package: TO-220AB - single-diode configuration with isolated tab (pin 2), anode (pin 1), and cathode (pin 3). Mounting via M3 screw with 0.55 N·m torque; epoxy meets UL94 V0.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Pin 1 | Anode | Input terminal for forward conduction; connects to switching node or transformer secondary winding |
| Pin 2 | Isolated Heat Sink Tab / Cathode Connection | Electrically isolated metal tab tied internally to cathode; enables direct heatsink mounting without insulator |
| Pin 3 | Cathode | Output terminal; routed to output capacitor or common return path in buck/flyback outputs |
Key Features
| Feature | Design Value |
|---|---|
| Proprietary field-effect rectifier process | Enables independent optimization of VF and IR-no silicon area compromise required for low-leakage designs |
| Stable IR over reverse voltage | Leakage remains ≤30 mA even at full 60 V VRRM and 125 °C-eliminates thermal runaway risk in unregulated loads |
| Low VF at high temperature | 0.30 V typ. @ 125 °C/5 A-maintains efficiency in thermally constrained enclosures |
| High-frequency capability | No reverse recovery charge (Qrr ≈ 0); supports clean zero-voltage switching in resonant topologies up to 500 kHz |
Applications
| Server VRM Output Rectification | Industrial 48 V DC/DC Converter |
|---|---|
Use Scenario: High-current, high-efficiency 12 V output stage in server voltage regulator modules with tight thermal budgets. IC Role / Device Role / Timing Role: Freewheeling diode replacing MOSFET synchronous rectifier in cost-sensitive VRM designs. Use Value: 0.30 V VF at 125 °C reduces conduction loss by 1.2 W vs. standard FRD at 20 A, lowering heatsink requirements. | Use Scenario: Secondary-side rectification in isolated 48 V input → 12 V output industrial DC/DC modules operating continuously at 60 °C ambient. IC Role / Device Role / Timing Role: Output rectifier in flyback or forward converter with 200 kHz switching frequency. Use Value: 175 °C Tj(max) and stable 30 mA IR at 125 °C ensure reliability without derating in sealed metal housings. |
| Telecom AC/DC Adapter | Automotive On-Board Charger (OBC) Auxiliary Supply |
Use Scenario: Compact 60 W AC/DC adapter for telecom infrastructure requiring >90% efficiency at full load. IC Role / Device Role / Timing Role: Primary-side clamp diode and secondary-side rectifier in quasi-resonant flyback. Use Value: Near-zero Qrr eliminates switching loss spikes and EMI during turn-off, easing EMC filter design. | Use Scenario: Auxiliary 12 V supply rectifier in EV on-board chargers exposed to under-hood temperatures up to 105 °C ambient. IC Role / Device Role / Timing Role: Freewheeling diode in LLC resonant converter auxiliary rail. Use Value: 1.6 °C/W Rth(j-c) enables direct bolt-down heatsinking to chassis, avoiding discrete thermal interface materials. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar field-effect rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH2006D | 600 V VRRM, 20 A IF(AV), 1.7 V VF @ 125 °C - higher voltage rating but 5.7× higher VF | Designed for primary-side snubbing or PFC boost diodes, not secondary-side low-VF rectification | Select only if >400 V blocking is required; avoid for 48 V systems due to excessive conduction loss |
| MBR2060CT | 60 V VRRM, dual common-cathode Schottky, 0.75 V VF @ 25 °C - no IR specification above 100 °C; IR rises rapidly beyond 125 °C | Used in low-cost consumer adapters; unsuitable for industrial temp cycling or long-life deployments | Acceptable for cost-driven commercial designs below 70 °C ambient; not qualified for extended thermal life above 105 °C |
Compared with STTH2006D and MBR2060CT, FERD20M60ST uniquely balances ultra-low VF, controlled high-temp IR, and 175 °C operation-making it the only viable field-effect rectifier for thermally aggressive, high-efficiency 48 V SMPS where both conduction loss and reliability are co-constrained.
Availability
FERD20M60ST is available at Aetrix Electronics and suitable for server VRMs, industrial 48 V DC/DC converters, and telecom AC/DC adapters requiring stable component supply with full production status since June 2015.
Supply support for FERD20M60ST 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.
FERD20M60ST belongs to ST's Field-Effect Rectifier (FERD) product line-engineered specifically to replace Schottky and fast recovery diodes in high-frequency, high-temperature power conversion where VF/IR co-optimization is essential.
FAQ
Is FERD20M60ST pin-compatible with standard TO-220AB fast recovery diodes?
Yes-FERD20M60ST uses industry-standard TO-220AB mechanical dimensions and pinout (anode-pin1, isolated tab/cathode-pin2, cathode-pin3), enabling drop-in replacement in existing layouts without footprint changes. Thermal and electrical behavior differs significantly, so layout review for thermal relief and EMI filtering is recommended.
What is the maximum surge current rating and test condition?
FERD20M60ST supports 275 A non-repetitive forward surge current (IFSM) for 10 ms sinusoidal half-cycle at 25 °C. This rating assumes junction temperature remains below 175 °C and is validated per IEC 61000-4-5 surge immunity standards for power supply input stages.
Does FERD20M60ST require a thermal pad or insulator when mounted to a heatsink?
No-its TO-220AB package features an electrically isolated metal tab internally connected to the cathode, allowing direct bolt-down to grounded heatsinks without thermal pads or insulators. Recommended torque is 0.55 N·m; maximum is 0.7 N·m to avoid package cracking.
How does FERD20M60ST perform in zero-voltage switching (ZVS) circuits?
It excels in ZVS topologies due to negligible reverse recovery charge (Qrr ≈ 0), eliminating turn-off voltage spikes and associated EMI. Measured junction capacitance is 220 pF at 0 V, decreasing to 85 pF at 45 V-enabling predictable soft-switching behavior in LLC and phase-shifted full-bridge converters.
FERD20M60ST Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Obsolete
- Technology:
- FERD (Field Effect Rectifier Diode)
- Voltage - DC Reverse (Vr) (Max):
- 60 V
- Current - Average Rectified (Io):
- 20A
- Voltage - Forward (Vf) (Max) @ If:
- 560 mV @ 20 A
- Speed:
- Fast Recovery =< 500ns, > 200mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 230 µA @ 60 V
- Capacitance @ Vr, F:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
- Operating Temperature - Junction:
- 175°C (Max)
FERD20M60ST FAQ
1.How can I place an order for FERD20M60ST through Aetrix?
Please submit a Request for Quotation (RFQ) for FERD20M60ST 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 FERD20M60ST reliable?
The price and inventory of FERD20M60ST are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD20M60ST is usually 5 days.
3.What payment methods are accepted for FERD20M60ST?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD20M60ST transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FERD20M60ST?
FERD20M60ST orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FERD20M60ST 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 FERD20M60ST?
For technical support, including FERD20M60ST datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD20M60ST requirements.
6.How does Aetrix verify that FERD20M60ST is sourced from the original manufacturer or authorized distributors?
All FERD20M60ST 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 FERD20M60ST meets industry standards.
7.What is the process for return or replacement of FERD20M60ST?
All FERD20M60ST units undergo pre-shipment inspection (PSI). If there is an issue with FERD20M60ST, 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 FERD20M60ST part is unused and in its original packaging.
Return procedure for FERD20M60ST:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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