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Discrete Semi Package

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Discrete Semiconductor Packages

Discrete Semiconductor Packages

Through-hole and SMD packages for transistors, diodes, and MOSFETs

Through-Hole Packages

PackagePinsBody Size (mm)Power (typ)Application
TO-9234.2 × 3.8 × 5.30.5WSmall signal transistors
TO-92L34.2 × 3.8 × 6.50.8WVoltage regulators
TO-12638.0 × 3.0 × 10.02WMedium power
TO-220310.0 × 4.5 × 15.950WPower transistors, regulators
TO-220F310.0 × 4.5 × 15.940WIsolated tab version
TO-247316.0 × 5.0 × 21.0150WHigh power MOSFETs, IGBTs
TO-264320.0 × 5.0 × 26.0250WVery high power
TO-32+case26.7 × 39.4 (can)150WPower transistors (metal can)
TO-3P315.5 × 5.0 × 20.0100WPower (plastic TO-3)
TO-1835.3 dia × 4.70.5WRF transistors (metal can)
TO-3938.1 dia × 6.71WLinear ICs, transistors
TO-53-88.1 dia × 6.71WMetal can, op-amps
DO-3522.0 dia × 4.00.5WSignal diodes
DO-4122.7 dia × 5.21WRectifier diodes
DO-20125.2 dia × 9.53WPower rectifiers

SMD Packages

PackagePinsBody Size (mm)Power (typ)Application
SOT-2332.9 × 1.3 × 1.10.35WSmall signal, general
SOT-23-552.9 × 1.6 × 1.10.35WVoltage regulators, ICs
SOT-23-662.9 × 1.6 × 1.10.35WSmall ICs
SOT-8934.5 × 2.5 × 1.51WMedium power SMD
SOT-22346.5 × 3.5 × 1.62WRegulators, power
SOT-32332.0 × 1.25 × 0.950.2WUltra-small signal
SOT-36362.0 × 1.25 × 0.950.2WDual transistors
SOD-12322.7 × 1.6 × 1.20.5WSMD diodes
SOD-32321.7 × 1.25 × 0.950.2WSmall SMD diodes
DPAK (TO-252)36.5 × 6.1 × 2.32WPower MOSFETs
D2PAK (TO-263)310.0 × 8.9 × 4.43WHigh power SMD
D3PAK (TO-268)315.0 × 10.0 × 4.85WVery high power SMD
PowerPAK SO-885.0 × 6.0 × 1.02.5WPower MOSFETs

Selection Guide

Choose package based on power dissipation needs. TO-92 for signals up to 0.5W, TO-220 for medium power up to 50W (with heatsink), TO-247 for high power. For SMD: SOT-23 for small signal, DPAK/D2PAK for power applications. Always verify thermal resistance (Rθja) for your specific application.

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Discrete Semi Package is a free online calculator tool. Use it to get instant, accurate results for your electronics calculations.