Variable Capacitance (Varicaps, Varactors)

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Mfr Part #
Quantity Available
Price
Series
Package
Product Status
Capacitance @ Vr, F
Capacitance Ratio
Capacitance Ratio Condition
Voltage - Peak Reverse (Max)
Diode Type
Q @ Vr, F
Operating Temperature
Mounting Type
Package / Case
Supplier Device Package
SOT-23
MAVR-000403-0287AT
VARACTOR,PLASTIC,LEAD-FREE,SINGL
MACOM Technology Solutions
24,350
In Stock
9,000
Factory
1 : ₹120.97000
Cut Tape (CT)
3,000 : ₹59.26895
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
16.5pF @ 4V, 1MHz
7.0
C2/C20
22 V
Single
250 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
SOT-23
MAVR-000409-0287FT
VARACTOR,LEAD-FREE,CK, PLASTIC
MACOM Technology Solutions
11,970
In Stock
1 : ₹138.01000
Cut Tape (CT)
3,000 : ₹68.50128
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
51.7pF @ 4V, 1MHz
9.5
C2/C20
22 V
1 Pair Common Cathode
150 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
SOT-23
MAVR-000407-0287AT
VARACTOR,PLASTIC,SOT23,LEAD-FREE
MACOM Technology Solutions
2,439
In Stock
9,000
Factory
1 : ₹120.97000
Cut Tape (CT)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
36.3pF @ 4V, 1MHz
9.0
C2/C20
22 V
Single
150 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
688
In Stock
1 : ₹173.79000
Cut Tape (CT)
3,000 : ₹88.04188
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
36.3pF @ 4V, 1MHz
9.0
C2/C20
22 V
1 Pair Common Cathode
150 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
SOT-23
MAVR-000409-0287AT
DIODE VARACTOR 22V 50MA SOT-23
MACOM Technology Solutions
3,468
In Stock
6,000
Factory
1 : ₹138.01000
Cut Tape (CT)
3,000 : ₹68.50128
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
51.7pF @ 4V, 1MHz
9.5
C2/C20
22 V
Single
150 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
11,854
In Stock
1 : ₹148.23000
Cut Tape (CT)
3,000 : ₹52.39526
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
19.8pF @ 4V, 1MHz
7.0
C2/C20
22 V
1 Pair Common Cathode
175 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
2,066
In Stock
6,000
Factory
1 : ₹166.97000
Cut Tape (CT)
3,000 : ₹84.60049
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
16.5pF @ 4V, 1MHz
7.0
C2/C20
22 V
1 Pair Common Cathode
250 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
1,796
In Stock
3,000
Factory
1 : ₹173.79000
Cut Tape (CT)
3,000 : ₹88.04188
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
24.2pF @ 4V, 1MHz
7.5
C2/C20
22 V
1 Pair Common Cathode
175 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
1
In Stock
9,000
Factory
1 : ₹138.01000
Cut Tape (CT)
3,000 : ₹68.50128
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
24.2pF @ 4V, 1MHz
7.5
C2/C20
22 V
Single
175 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
SOT-23
MAVR-000401-0287AT
VARACTOR,PLASTIC,SOT-23,LEAD-FRE
MACOM Technology Solutions
0
In Stock
18,000
Factory
Check Lead Time
1 : ₹216.38000
Cut Tape (CT)
3,000 : ₹68.50128
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
11pF @ 4V, 1MHz
6.0
C2/C20
22 V
Single
250 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
SOT-23
MAVR-000401-0287FT
VARACTOR,PLASTIC,CK,LEAD-FREE,SO
MACOM Technology Solutions
0
In Stock
21,000
Factory
Check Lead Time
1 : ₹230.01000
Cut Tape (CT)
3,000 : ₹74.25899
Tape & Reel (TR)
Tape & Reel (TR)
Cut Tape (CT)
Digi-Reel®
Active
11pF @ 4V, 1MHz
6.0
C2/C20
22 V
1 Pair Common Cathode
250 @ 4V, 50MHz
-55°C ~ 125°C
Surface Mount
TO-236-3, SC-59, SOT-23-3
SOT-23
Showing
of 11

Variable Capacitance Diodes (Varicaps, Varactors)


A varactor diode—also known as a varicap or tuning diode—is a type of semiconductor diode designed to operate in reverse bias, where it behaves like a variable capacitor rather than a typical rectifier. Its core function is to exploit the voltage-dependent capacitance of a reverse-biased PN junction, where the width of the depletion region changes with applied voltage, altering the capacitance. This feature makes varactors indispensable in electronic tuning applications, such as frequency modulation (FM), phase-locked loops (PLLs), voltage-controlled oscillators (VCOs), and RF filters. Varactors do not conduct in reverse bias and are used purely for their capacitive behavior. Additionally, MOS varactors—metal-oxide-semiconductor based—offer improved linearity and integration in CMOS technologies, making them suitable for modern RF IC designs.

When selecting a varactor, several key parameters must be considered to ensure optimal performance in the target application. Capacitance range and tuning ratio (the ratio of maximum to minimum capacitance) are critical, as they determine how much frequency variation can be achieved. Quality factor (Q) affects signal purity and is especially important in high-frequency RF circuits. Engineers must also consider series resistance, reverse breakdown voltage, and package type, particularly in space-constrained or temperature-sensitive environments. Although varactors are compact and energy-efficient, their non-linear capacitance-voltage curve can introduce distortion, and they typically have a limited tuning range compared to mechanical alternatives. Nonetheless, for most automatic tuning, frequency modulation, and bandwidth control applications, varactors provide a solid-state solution that’s fast, reliable, and easier to integrate into modern analog and RF systems.