UF4007 Reference Tables, Pins & Specifications

Pin reference

Signal names, electrical functions and connection guidance

DO-41

Physical pin numbers2 pins

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UF4007 pin functions and connections
Pin	Signal	Type	Function & connection
	K	Cathode	The banded end of the rectifier. Connection guidance Connect to the positive half-wave output in the example. This page uses the KiCad convention 1 = cathode, 2 = anode. The manufacturer identifies polarity by the band, not numeric package pins.
	A	Anode	Conventional forward current enters here and leaves the cathode. Connection guidance Connect to the isolated low-voltage AC source in the example. Forward voltage depends on current and temperature; 0.7 V is only the teaching assumption used below.

Vishay UF4007-E3 / M3

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Device	Ultrafast PN rectifier	Glass-passivated junction
Package	DO-41 / DO-204AL	Molded axial body
Cathode	Colored body band	Polarity does not depend on rotation
PCB numbering	1 = K · 2 = A	Page / footprint convention
Lead finish	Matte tin plated	Silver-colored round leads
Ordering example	UF4007-E3/54	Commercial tape and reel

An identical body does not make the electrical ratings identical to 1N4007.

Selected UF4007 column

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Repetitive reverse peak	1000 V	VRRM
RMS reverse voltage	700 V	VRMS
DC blocking voltage	1000 V	VDC
Average rectified current	1 A	9.5 mm lead length; TA = 55°C
Surge current	30 A	8.3 ms single half-sine superimposed on rated load
Junction / storage range	−55 to +150°C	Absolute limits

Thermal derating and mounting conditions still apply; these limits are not simultaneous design targets.

25°C ambient unless stated

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Forward voltage	1.7 V maximum	IF = 1 A; 300 µs pulse, 1% duty
Reverse leakage	10 µA maximum	Rated blocking voltage; TA = 25°C
Hot reverse leakage	50 µA maximum	Rated blocking voltage; TA = 100°C
Reverse recovery	75 ns maximum	IF = 0.5 A; IR = 1 A; recovery endpoint Irr = 0.25 A
Junction capacitance	17 pF typical	VR = 4 V; f = 1 MHz
Typical RθJA / RθJL	60 / 15°C/W	Manufacturer’s stated lead/mounting conditions

The 1.7 V maximum is not the fixed 0.7 V teaching assumption used in the basic circuit.

DO-41 outline and authored lands

Manufacturer-referenced values6 parameters

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Parameter	Value	Conditions / notes
Body length	4.1–5.2 mm	Before lead forming
Body diameter	2.0–2.7 mm	Molded body
Lead diameter	0.71–0.86 mm	Plated wire
Straight lead length	25.4 mm minimum per end	Before forming/cutting
Chosen mounting pitch	10.16 mm	Authored layout choice
Pad / finished hole	2.0 / 1.1 mm	Check actual leads and assembly clearance

The downloadable footprint is an engineering starting pattern, not a manufacturer-certified PCB layout.

Isolated supply; calculated values

Manufacturer-referenced values8 parameters

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Parameter	Value	Conditions / notes
Input	9 V RMS · 60 Hz	Isolated sine source
Load	1 kΩ · 0.25 W or greater	Cathode to load positive
Assumed drop	0.7 V	Fixed model only
Input peak	12.73 V	9 × √2
Output peak	12.03 V	Input peak minus assumed drop
Peak current	12.03 mA	12.03 V / 1 kΩ
Average output	Approximately 3.71 V	Unfiltered half-wave with conduction threshold
Recovery measurement	Not demonstrated by this slow circuit	Needs the defined test currents and fast measurement

Both ground symbols share the isolated source return.