MBR20100CT Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

TO-220AB

Physical pin numbers3 pins

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MBR20100CT pin functions and connections
Signal	Type	Function & connection
A1	Anode 1	Input to the first Schottky junction. Connection guidance Connect to the current-limited 5 V source in the example. Each junction has its own current and thermal limits.
K	Common cathode	Both cathodes and the exposed metal tab share this node. Connection guidance Connect to the load positive. The load returns to the shared source ground. The heatsink/tab is electrically live, not ground. Insulate it if required.
A2	Anode 2	Input to the second Schottky junction. Connection guidance Connect to the current-limited 3.3 V source in the example. The higher available source normally supplies the load; equal sharing is not guaranteed.

Two independently documented references

Manufacturer-referenced values5 parameters

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Parameter	Value	Conditions / notes
Through-hole	Vishay MBR20100CT-E3	TO-220AB
SMD	Diodes Incorporated MBRB20100CT	D2PAK / TO263AB
Pin functions	1=A1; 2=K; 3=A2	Both selected references
Metal tab	Common cathode	Not an isolated mounting surface
Architecture	Two Schottky junctions	Common cathode connection

Do not transfer temperature or thermal-resistance ratings between manufacturers.

Vishay 89033, 100 V column

Manufacturer-referenced values7 parameters

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Parameter	Value	Conditions / notes
Reverse peak / working / DC	100 V	Each diode
Average current	20 A total / 10 A per diode	Case 133°C
Forward surge	150 A per diode	Single 8.3 ms half sine on rated load
Avalanche energy	130 mJ per diode	TJ=25°C; L=60 mH
Repetitive reverse peak current	0.5 A per diode	2 µs; 1 kHz; TJ=38±2°C
Voltage slew	10,000 V/µs	At rated reverse voltage
Junction / storage	−65 to +150°C	Absolute limits

The fully insulated MBRF variant is not the selected TO-220 device.

Vishay per-diode limits

Manufacturer-referenced values7 parameters

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Parameter	Value	Conditions / notes
Forward drop	0.80 V maximum	10 A; case 25°C
Hot forward drop	0.65 V maximum	10 A; case 125°C
High-current pulse drop	0.75 V maximum	20 A; case 125°C
Forward test	300 µs; 1% duty	Avoid self-heating during measurement
Reverse leakage	100 µA maximum	Rated reverse; TJ=25°C
Hot reverse leakage	6 mA maximum	Rated reverse; TJ=125°C
Typical RθJC / RθJA	2 / 60°C/W per diode	Manufacturer thermal reference

Check dissipation and cooling for both junctions, not only the total current label.

Diodes DS37071, MBRB20100CT

Manufacturer-referenced values8 parameters

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Parameter	Value	Conditions / notes
Reverse voltage	100 V	Per leg
Average output	10 A per leg / 20 A total	Half-wave 60 Hz resistive/inductive; derate capacitive loads 20%
Forward surge	150 A	Single 8.3 ms half sine on rated load
Forward drop	0.79 V typical; 0.84 V maximum	10 A; TJ=25°C
Hot forward drop	0.72 V maximum	10 A; TJ=125°C
Reverse leakage	0.1 mA / 10 mA maximum	100 V; TJ=25 / 125°C
Typical RθJC / RθJA	5 / 20°C/W	Tested with manufacturer’s 2-inch aluminum board
Junction / storage	−55 to +175°C	SMD reference only

Use the SMD PDF for its own derating curves and test setup.

Dimensions before assembly

Manufacturer-referenced values7 parameters

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Parameter	Value	Conditions / notes
TO-220 lead pitch	2.45–2.65 mm	Nominal 2.54 mm
TO-220 body width	9.65–10.54 mm	Vishay outline
TO-220 lead width / thickness	0.70–0.90 / 0.36–0.56 mm	Vishay outline
Authored through-hole pads	2.2 mm copper; 1.2 mm holes	Engineering layout choice
SMD cathode land	10.41 × 7.01 mm	Diodes suggested layout
SMD anode lands	1.10 × 3.50 mm	5.08 mm centers
SMD overall land span	15.99 mm	From cathode land top to anode land bottom

Check the actual package revision, heatsink and PCB assembly process.

Isolated low-voltage teaching circuit

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Sources	5 V and 3.3 V DC	Both current limited; shared ground
Load	100 Ω; at least 0.5 W	Connected to common cathode
Assumed forward drop	0.5 V	Not a guaranteed operating value
Output / load current	4.5 V / 45 mA	Higher source supplies load
Load / diode dissipation	202.5 / 22.5 mW	Fixed-drop calculation
Lower-source branch	Approximately 1.2 V reverse bias	Leakage remains; not a perfect disconnect

This is not an ideal-diode controller and does not guarantee equal current sharing.