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STMicroelectronics FERD30M45CT
- Part No.:
- FERD30M45CT
- Manufacturer:
- STMicroelectronics
- Category:
- Diode Arrays
- Package:
- TO-220-3
- Datasheet:
-
FERD30M45CT.pdf
- Description:
- DIODE ARRAY FERD 45V 15A TO-220
- Quantity:
- Payment:
- Shipping:
Inventory:1,333
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Product details
Overview
FERD30M45CT from STMicroelectronics is a dual-center-tap field-effect rectifier in TO-220AB package, rated for 45 V repetitive peak reverse voltage, 2 × 15 A average forward current per diode, and 0.35 V typical forward voltage drop at 125 °C/7.5 A - optimized for solar bypass junction boxes and high-frequency switch-mode power supplies.
For engineers reviewing the FERD30M45CT datasheet, FERD30M45CT pinout, FERD30M45CT application, or FERD30M45CT equivalent, this device delivers stable leakage current across full reverse voltage range, low conduction loss, thermal robustness up to 175 °C junction temperature, and compatibility with standard heatsink mounting via TO-220AB mechanical interface.
Technical Context
This dual-diode rectifier integrates two independent Schottky-like field-effect rectifying elements sharing a common cathode (K) and separate anodes (A1, A2), enabling center-tap configuration without external wiring. Its proprietary process ensures minimal IR drift over temperature and voltage - leakage stays ≤50 mA at 125 °C and VRRM.
Designed for unidirectional DC output generation in photovoltaic bypass paths and SMPS secondary-side rectification, it operates reliably under pulsed and continuous DC forward bias, with thermal resistance Rth(j-c) = 1.6 °C/W per diode and coupling resistance Rth(c) = 0.5 °C/W between die and case.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRRM | 45 V - maximum repetitive reverse blocking capability per diode, suitable for 24–48 V PV string protection |
| IF(AV) per diode | 15 A - continuous DC current rating at Tc = 155 °C, enabling 30 A total device output |
| VF(typ) | 0.35 V at 125 °C / 7.5 A - low conduction loss reduces heat generation in compact solar junction boxes |
| IR(max) | 50 mA at 125 °C / VRRM - stable leakage prevents thermal runaway in parallel-connected PV modules |
| Tj(max) | 175 °C - extended junction temperature supports operation in sealed, high-ambient enclosures |
| Rth(j-c) | 1.6 °C/W per diode - enables precise thermal design using standard TO-220 heatsinks |
| Package | TO-220AB - industry-standard through-hole package with isolated tab for direct heatsink mounting |
Pinout & Package
Package: TO-220AB - thermally enhanced plastic package with electrically isolated metal tab (pin 3), three leads (A1, K, A2), and recommended torque of 0.8–1.0 N·m for mounting screw.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1 | Anode 1 | Input terminal for first rectifying path; connects to PV submodule positive line in bypass configuration |
| K | Common Cathode | Shared output node for both diodes; ties to system ground or return rail in center-tap topology |
| A2 | Anode 2 | Input terminal for second rectifying path; connects to adjacent PV submodule positive line |
Key Features
| Feature | Design Value |
|---|---|
| Stable leakage vs. reverse voltage | IR remains ≤50 mA at 125 °C and full 45 V VRRM - eliminates thermal runaway risk in multi-string arrays |
| Low VF at high temperature | 0.35 V typ. at 125 °C/7.5 A - cuts conduction loss by ~30% vs. standard Schottky diodes at same condition |
| Dual-diode center-tap integration | Single-package A1–K–A2 topology replaces discrete dual-Schottky + external wiring - reduces PCB area and assembly cost |
| High surge tolerance | 250 A non-repetitive forward surge (tp = 10 ms) - withstands lightning-induced transients in outdoor PV installations |
Applications
| Solar Bypass Junction Box | SMPS Secondary Rectification |
|---|---|
Use Scenario: Installed across individual PV cell substrings to shunt current during partial shading or fault conditions. IC Role / Device Role / Timing Role: Field-effect rectifier providing low-loss, thermally stable bypass path under reverse-biased string voltage. Use Value: Prevents hot-spot damage by maintaining <0.35 V forward drop and limiting leakage to ≤50 mA even at 125 °C ambient. | Use Scenario: Used in DC-DC converter secondary side to rectify high-frequency transformer output (e.g., 100–500 kHz). IC Role / Device Role / Timing Role: High-frequency switching rectifier replacing conventional fast recovery diodes in isolated flyback or forward converters. Use Value: Enables >92% efficiency at light-to-moderate loads due to low VF and negligible reverse recovery charge. |
| Industrial DC Power Distribution | Redundant Power OR-ing |
Use Scenario: Deployed in 48 V telecom or industrial power rails where multiple sources feed a common bus. IC Role / Device Role / Timing Role: Dual-anode rectifier isolating source branches while allowing shared cathode output to load. Use Value: Eliminates need for external diode pairs; 1.6 °C/W Rth(j-c) supports forced-air-cooled 15 A/channel derating. | Use Scenario: Implemented in redundant 24 V DC power systems to prevent backfeed between parallel supplies. IC Role / Device Role / Timing Role: Center-tap OR-ing diode ensuring only higher-voltage supply powers the load, with automatic isolation on failure. Use Value: Achieves <150 mV forward threshold asymmetry between A1 and A2 paths, enabling reliable priority selection without control circuitry. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar field-effect rectifier applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| STTH30L04CG | 40 V VRRM, 30 A IF(RMS), TO-220AC package, no common cathode - single-diode, higher VF (0.52 V typ.) | Requires two devices + external wiring for center-tap function; less space-efficient | Select when needing higher single-diode current rating and discrete layout flexibility |
| MBR3045CT | 45 V VRRM, 30 A IF(RMS), TO-220AB, Schottky construction - higher IR (1.2 mA at 25 °C), lower Tj(max) = 150 °C | Higher leakage at elevated temperature limits use in high-ambient solar enclosures | Select for cost-sensitive, lower-temperature applications where leakage stability is not critical |
Compared with STTH30L04CG and MBR3045CT, FERD30M45CT uniquely combines dual-center-tap integration, 175 °C junction rating, and sub-0.4 V VF at 125 °C - making it the only option qualified for thermally demanding, space-constrained solar bypass designs requiring long-term leakage stability.
Availability
FERD30M45CT is available at Aetrix Electronics and suitable for solar bypass junction boxes, switch-mode power supplies, and industrial DC power distribution systems requiring stable component supply, consistent thermal performance, and TO-220AB mechanical compatibility.
Supply support for FERD30M45CT 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 microcontrollers, power devices, sensors, and analog ICs for industrial, automotive, and consumer markets.
The FERD30M45CT belongs to ST's Field Effect Rectifier (FERD) product line - engineered specifically for high-reliability, high-temperature rectification in photovoltaic and high-efficiency power conversion systems.
FAQ
What is the maximum continuous junction temperature for FERD30M45CT?
The absolute maximum operating junction temperature is +175 °C. This rating applies under all operating conditions including simultaneous forward conduction and reverse bias. The device may operate up to +200 °C only in D²PAK variant under strictly defined DC forward-only conditions - not applicable to the TO-220AB-packaged FERD30M45CT.
Can FERD30M45CT be used in place of a standard dual Schottky diode like MBR3045CT?
Yes, but with key trade-offs: FERD30M45CT offers superior thermal stability and lower leakage at high temperature, yet has slightly higher VF than MBR3045CT at room temperature. Its field-effect structure avoids reverse recovery charge, making it better suited for high-frequency SMPS, though layout must respect its center-tap pinout (A1–K–A2).
Is the metal tab of the TO-220AB package electrically isolated?
Yes - the TO-220AB package used for FERD30M45CT features an electrically isolated metal tab (pin 3), which is internally connected to the cathode (K). This allows direct mounting to a grounded heatsink without requiring insulating hardware, simplifying thermal management in high-voltage PV bypass applications.
What is the recommended mounting torque for the FERD30M45CT TO-220AB package?
The manufacturer specifies a recommended torque range of 0.8 to 1.0 N·m for the mounting screw. Applying torque within this range ensures optimal thermal contact between the isolated tab and heatsink while avoiding package deformation or die stress that could compromise long-term reliability in cyclic thermal environments.
FERD30M45CT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- STMicroelectronics
- Series:
- -
- Package/Case:
- TO-220-3
- Packaging:
- Tube
- Product Status:
- Active
- Diode Configuration:
- 1 Pair Common Cathode
- Technology:
- FERD (Field Effect Rectifier Diode)
- Voltage - DC Reverse (Vr) (Max):
- 45 V
- Current - Average Rectified (Io) (per Diode):
- 15A
- Voltage - Forward (Vf) (Max) @ If:
- 470 mV @ 15 A
- Speed:
- No Recovery Time > 500mA (Io)
- Reverse Recovery Time (trr):
- -
- Current - Reverse Leakage @ Vr:
- 600 µA @ 45 V
- Operating Temperature - Junction:
- 175°C (Max)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- TO-220
FERD30M45CT FAQ
1.How can I place an order for FERD30M45CT through Aetrix?
Please submit a Request for Quotation (RFQ) for FERD30M45CT 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 FERD30M45CT reliable?
The price and inventory of FERD30M45CT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for FERD30M45CT is usually 5 days.
3.What payment methods are accepted for FERD30M45CT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for FERD30M45CT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for FERD30M45CT?
FERD30M45CT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your FERD30M45CT 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 FERD30M45CT?
For technical support, including FERD30M45CT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your FERD30M45CT requirements.
6.How does Aetrix verify that FERD30M45CT is sourced from the original manufacturer or authorized distributors?
All FERD30M45CT 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 FERD30M45CT meets industry standards.
7.What is the process for return or replacement of FERD30M45CT?
All FERD30M45CT units undergo pre-shipment inspection (PSI). If there is an issue with FERD30M45CT, 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 FERD30M45CT part is unused and in its original packaging.
Return procedure for FERD30M45CT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
FERD30M45CT Tags
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