onsemi 2SC3382S

Overview

2SC3382S from SANYO Semiconductor is an NPN epitaxial planar silicon transistor designed for low-noise audio frequency amplification, featuring a gain-bandwidth product of 250 MHz, DC current gain (hFE) ranging 100–560 at IC = 1 mA, and noise voltage of 40 mV (ave) at 1 kHz with Rg = 56 kΩ. It operates with VCEO = 50 V, IC = 200 mA, and PC = 400 mW in AF preamp and driver stages.

For engineers reviewing the 2SC3382S datasheet, pinout, applications, or equivalent options, key selection criteria include its low-noise performance (NF = 0.5 dB at 1 kHz), high fT, tight hFE binning (Rank S: 140–280), and TO-92 compatible package - critical for discrete audio gain blocks, microphone preamps, and signal chain front-ends.

Technical Context

The 2SC3382S employs SANYO's FBET (Flat Base Epitaxial Transistor) process to achieve low base resistance and controlled junction capacitance, enabling stable high-gain operation with minimal noise contribution. Its Cob = 2.7 pF at VCB = 6 V and f = 1 MHz supports wideband AF response without peaking.

Designed for linear amplification, it delivers VCE(sat) = 0.3 V at IC = 100 mA/IB = 10 mA and VBE(sat) = 1.0 V under same conditions, ensuring predictable biasing in Class-A and AB amplifier topologies. The device is characterized across –40°C to +120°C ambient, with hFE and fT maintained over temperature per published curves.

Key Specifications

Pinout & Package

2SC3382S is housed in a TO-92 plastic package (JEDEC TO-226AA), with lead spacing and dimensions conforming to standard through-hole mounting. Pin identification is standardized across SANYO's 2SA1391/2SC3382 family.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-noise NPN transistor applications.

Compared with 2N5088 and BC549C, the 2SC3382S offers superior noise performance and higher voltage rating while maintaining excellent high-frequency linearity - making it optimal for professional-grade AF amplification where SNR and dynamic range are critical.

Availability

2SC3382S is available at Aetrix Electronics and suitable for microphone preamplifiers, phono preamp stages, and discrete audio tone control circuits requiring stable component supply, long-term obsolescence management, and traceable sourcing.

Supply support for 2SC3382S includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

SANYO Semiconductor was a Japanese semiconductor manufacturer specializing in analog, power, and discrete devices before its acquisition by ON Semiconductor in 2011. Known for high-reliability audio and power transistors.

The 2SC3382S belongs to SANYO's low-noise AF transistor family, engineered specifically for high-fidelity audio signal amplification where noise floor, gain consistency, and thermal stability are essential.

FAQ

What is the maximum collector-emitter voltage rating for the 2SC3382S?

The 2SC3382S has a maximum collector-to-emitter voltage (VCEO) rating of 50 V under standard test conditions (IC = 1 mA, RBE = ∞). This defines the absolute upper limit for safe operation in common-emitter configurations. Exceeding this voltage risks avalanche breakdown and permanent device failure. Always maintain ≥20% derating margin in production designs, especially under temperature or transient stress.

Does the 2SC3382S have a specified noise figure (NF), and at what conditions?

Yes, the 2SC3382S achieves a noise figure (NF) of 0.5 dB at 1 kHz, measured with VCE = 6 V, IC = 1 mA, Rg = 56 kΩ, and ∆f = 1 Hz. This value is confirmed in the datasheet's noise characteristic graphs (No.1942-5/6, ITR03392). The low NF directly supports high-SNR applications such as condenser microphone preamplifiers and phono stages.

What does the "S" suffix in 2SC3382S indicate?

The "S" suffix in 2SC3382S denotes the hFE Rank S binning, specifying a DC current gain range of 140–280 at VCE = 6 V and IC = 1 mA. This tighter distribution improves gain predictability and matching in dual-transistor circuits (e.g., differential pairs or cascode stages), reducing need for manual selection or trimming during manufacturing.

Can the 2SC3382S be used in place of the 2SC3382 without modification?

Yes - the 2SC3382S is a binned version of the base 2SC3382, sharing identical absolute maximum ratings, pinout, package, and electrical characteristics except for the guaranteed hFE range. No PCB or schematic changes are required; the "S" variant simply ensures tighter gain specification for improved design consistency and yield.

What is the thermal resistance junction-to-ambient (RθJA) for the 2SC3382S in TO-92 package?

The datasheet does not explicitly list RθJA for the 2SC3382S, but based on SANYO's standard TO-92 (JEDEC TO-226AA) construction and PC = 400 mW rating at Ta = 25°C, typical RθJA is ~200°C/W under still-air conditions. For reliable operation above 100 mW dissipation, use copper pour or small heatsink; derate linearly above 25°C ambient per the PC vs. Ta curve (No.1942-4/6, ITR03383).