MBRF20L120CT Equivalent & Substitute Parts

Part Overview

The MBRF20L120CT is a Schottky diode array manufactured by Taiwan Semiconductor Corporation, configured as 1 pair common cathode with 120 V reverse voltage rating and 20 A average rectified current per diode. The device is packaged in TO-220-3 with isolated tab and features fast recovery characteristics suitable for high-frequency rectification applications.

This part is discontinued at DiGi Electronics. Equivalent and substitute parts from active manufacturers are available to maintain design continuity and ensure supply chain availability. Substitute selection is based on matching electrical parameters, package configuration, and thermal characteristics within the specified operating range.

Key Parameters

Parameter	Value	Unit
Diode Configuration	1 Pair Common Cathode	—
Technology	Schottky	—
Voltage - DC Reverse (Vr) (Max)	120	V
Current - Average Rectified (Io) (per Diode)	20	A
Voltage - Forward (Vf) (Max) @ If	900 mV @ 20 A	—
Speed	Fast Recovery ≤ 500ns, > 200mA (Io)	—
Current - Reverse Leakage @ Vr	20	µA @ 120 V
Operating Temperature - Junction	-55 to 150	°C
Mounting Type	Through Hole	—
Package / Case	TO-220-3 Full Pack, Isolated Tab	—
Supplier Device Package	ITO-220AB	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts are grouped based on current rating capacity, as this is the primary parameter that determines functional equivalence for rectifier diode arrays. All substitute parts maintain the following core electrical and mechanical specifications:

Fixed Parameters (All Substitutes):

Diode Configuration: 1 Pair Common Cathode
Technology: Schottky
Voltage - DC Reverse (Vr) (Max): 120 V
Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
Mounting Type: Through Hole
Package / Case: TO-220-3 Full Pack, Isolated Tab
Supplier Device Package: ITO-220AB
RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level (MSL): 1 (Unlimited)

Variable Parameters (Substitution Basis):

Current - Average Rectified (Io) (per Diode): 10 A, 15 A, 20 A, or 30 A
Voltage - Forward (Vf) (Max) @ If: Varies by current rating
Current - Reverse Leakage @ Vr: Varies by manufacturer and current rating
Operating Temperature - Junction: -40°C to 150°C (Vishay parts) or -55°C to 150°C (original)

The MBRF20L120CT operates at 20 A and serves as the reference point. Substitute parts with 20 A rating (VF40120C-E3/4W, VF40120C-M3/4W, VF40M120C-M3/4W) provide direct electrical equivalence. Parts with lower current ratings (10 A and 15 A) are suitable for applications requiring reduced current capacity. The 30 A rated part (VF60120C-M3/4W) accommodates higher current demands within the same voltage and package specifications.

Parameter Comparison

Part Number	Manufacturer	Io (per Diode)	Vf (Max) @ If	Vr (Max)	Reverse Leakage @ Vr	Tj (Operating)	Product Status
MBRF20L120CT	Taiwan Semiconductor Corporation	20 A	900 mV @ 20 A	120 V	20 µA @ 120 V	-55 to 150°C	Discontinued
VF20120C-E3/4W	Vishay General Semiconductor	10 A	900 mV @ 10 A	120 V	700 µA @ 120 V	-40 to 150°C	Active
VF20M120C-M3/4W	Vishay General Semiconductor	10 A	910 mV @ 10 A	120 V	700 µA @ 120 V	-40 to 150°C	Active
VF30120C-E3/4W	Vishay General Semiconductor	15 A	970 mV @ 15 A	120 V	800 µA @ 120 V	-40 to 150°C	Active
VF30120C-M3/4W	Vishay General Semiconductor	15 A	970 mV @ 15 A	120 V	800 µA @ 120 V	-40 to 150°C	Active
VF40120C-E3/4W	Vishay General Semiconductor	20 A	880 mV @ 20 A	120 V	500 µA @ 120 V	-40 to 150°C	Active
VF40120C-M3/4W	Vishay General Semiconductor	20 A	880 mV @ 20 A	120 V	500 µA @ 120 V	-40 to 150°C	Active
VF40M120C-M3/4W	Vishay General Semiconductor	20 A	890 mV @ 20 A	120 V	500 µA @ 120 V	-40 to 150°C	Active
VF60120C-M3/4W	Vishay General Semiconductor	30 A	950 mV @ 30 A	120 V	500 µA @ 120 V	-40 to 150°C	Active

Engineering Selection Recommendations

Direct Electrical Equivalents (20 A Rating):

VF40120C-E3/4W, VF40120C-M3/4W, and VF40M120C-M3/4W are direct substitutes for the MBRF20L120CT. All three parts maintain the 20 A current rating and 120 V reverse voltage specification. Forward voltage characteristics are comparable (880–890 mV @ 20 A versus 900 mV for the original part). These parts are manufactured by Vishay General Semiconductor under the TMBS® series and carry active product status with ROHS3 compliance and unlimited moisture sensitivity rating.

The primary difference between these three 20 A variants is packaging designation (E3/4W versus M3/4W variants), which reflects different manufacturing or distribution channels. All three are electrically and mechanically interchangeable in the TO-220-3 ITO-220AB package.

Current-Reduced Alternatives (10 A and 15 A Ratings):

VF20120C-E3/4W and VF20M120C-M3/4W (10 A rating) and VF30120C-E3/4W and VF30120C-M3/4W (15 A rating) are suitable for applications where the full 20 A capacity is not required. These parts maintain identical voltage ratings, package configuration, and fast recovery characteristics. Selection of these lower-rated parts is appropriate only when circuit design confirms that maximum current demand does not exceed the specified rating.

Higher Current Alternative (30 A Rating):

VF60120C-M3/4W provides 30 A capacity within the same 120 V voltage and TO-220-3 package specifications. This part is suitable for applications requiring current capacity beyond the original 20 A specification while maintaining all other electrical and mechanical parameters.

Compliance and Availability:

All substitute parts are ROHS3 compliant, carry MSL 1 (unlimited) moisture sensitivity rating, and are currently in active production status. Inventory availability is confirmed for all listed substitutes.

Frequently Asked Questions (FAQ)

Q: Can VF40120C-E3/4W directly replace MBRF20L120CT in existing designs?

A: Yes. VF40120C-E3/4W is a direct electrical and mechanical substitute. Both parts feature 20 A current rating, 120 V reverse voltage, Schottky technology, fast recovery characteristics, and identical TO-220-3 ITO-220AB package configuration. Forward voltage is slightly lower (880 mV versus 900 mV @ 20 A), which is favorable for efficiency. No circuit modifications are required.

Q: What is the difference between VF40120C-E3/4W, VF40120C-M3/4W, and VF40M120C-M3/4W?

A: All three parts are electrically equivalent with 20 A rating and 120 V reverse voltage. The designations E3/4W and M3/4W reflect different packaging or distribution variants from Vishay General Semiconductor. Forward voltage specifications are nearly identical (880–890 mV @ 20 A). Selection between these three is based on supplier availability and inventory status.

Q: Can I use VF30120C-E3/4W (15 A) instead of MBRF20L120CT (20 A)?

A: VF30120C-E3/4W is suitable only if circuit design confirms that maximum rectified current does not exceed 15 A. The part maintains all other electrical specifications (120 V reverse voltage, Schottky technology, fast recovery, TO-220-3 package). Using a lower-rated part in a 20 A application will result in device failure or thermal stress.

Q: Are all substitute parts RoHS compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification. The original MBRF20L120CT also meets ROHS3 requirements.

Q: What is the operating temperature range difference between the original part and substitutes?

A: The MBRF20L120CT operates from -55°C to 150°C junction temperature. All Vishay substitute parts (VF series) operate from -40°C to 150°C. If the application requires operation below -40°C, the original part specification must be maintained or alternative sources identified.

Q: Can I use VF60120C-M3/4W (30 A) in place of MBRF20L120CT (20 A)?

A: Yes. VF60120C-M3/4W is electrically and mechanically compatible. The 30 A rating provides additional current capacity margin. All other specifications (120 V reverse voltage, Schottky technology, fast recovery, TO-220-3 package, temperature range -40 to 150°C) are maintained. This substitution is appropriate for applications where higher current capacity is beneficial or anticipated.

Q: Are the reverse leakage current differences significant?

A: The MBRF20L120CT specifies 20 µA reverse leakage @ 120 V, while Vishay substitutes range from 500–800 µA @ 120 V depending on current rating. Higher reverse leakage increases standby power dissipation. For applications sensitive to leakage current, this difference must be evaluated against circuit requirements. The original part exhibits lower leakage; however, all values remain within acceptable ranges for standard rectifier applications.

Q: Is the TO-220-3 ITO-220AB package identical across all parts?

A: Yes. All parts use TO-220-3 Full Pack with isolated tab configuration and ITO-220AB supplier device package designation. PCB footprint, lead spacing, and thermal interface characteristics are identical. No layout modifications are required when substituting between listed parts.

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