onsemi 2SC3143-4-TB-E

Overview

2SC3143-4-TB-E from SANYO is an NPN epitaxial planar silicon transistor designed for high-voltage switching and AF power amplifier stages, with V_CEO = −160 V, I_C = −8 A, P_C = 200 W, and h_FE rank 4 (180–290 at I_C = −10 mA), used in 100W output predriver circuits for audio amplifiers and industrial inverters.

For engineers reviewing the 2SC3143-4-TB-E datasheet, pinout, applications, or equivalent options, key selection criteria include breakdown voltage margin, switching speed (t_on = 0.81 µs, t_off = 0.99 µs), output capacitance (C_ob = 2.4 pF at V_CB = −10 V), saturation behavior (V_CE(sat) = −1.0 V at I_C = −8 A), and thermal derating above 25°C ambient.

Technical Context

This device operates as a high-power NPN switch with complementary PNP counterpart 2SA1257, sharing identical CP package and absolute ratings. Its design targets linear and switching operation in Class AB/B audio output stages and DC-AC conversion circuits requiring robust V_CEO ≥ 160 V and f_T = 150 MHz at V_CE = −10 V, I_C = −10 mA.

The 2SC3143-4-TB-E exhibits low output capacitance (C_ob = 2.4 pF) and fast switching (t_f = 0.20 µs), enabling efficient high-frequency operation up to several MHz in resonant converters and RF driver applications. Its h_FE rank 4 ensures consistent current gain (180–290) across production lots for predictable biasing in multi-transistor amplifier arrays.

Key Specifications

Pinout & Package

2SC3143-4-TB-E is housed in the CP (TO-3P) package: metal-can, isolated collector, vertical mounting, 3-pin configuration with 2.54 mm lead pitch and 15.8 mm × 20.0 mm footprint.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN high-voltage power transistor applications.

Compared with 2SC3143-5-TB-E and MJE13009, the 2SC3143-4-TB-E offers optimal balance of gain consistency (180–290), low output capacitance (2.4 pF), and proven audio linearity-making it preferred for fidelity-critical amplifier output stages where predictable bias and minimal Miller distortion are essential.

Availability

2SC3143-4-TB-E is available at Aetrix Electronics and suitable for high-fidelity audio amplifiers, industrial motor drive inverters, and RF power driver stages requiring stable component supply, long-lifecycle support, and traceable sourcing for legacy system maintenance.

Supply support for 2SC3143-4-TB-E 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 Electric Co., Ltd. was a Japanese semiconductor manufacturer specializing in power transistors, analog ICs, and optoelectronics before its acquisition by Panasonic in 2012; known for high-reliability discrete devices with rigorous binning and thermal validation.

The 2SC3143 belongs to SANYO's CP-series high-power bipolar transistor family, engineered specifically for audio output stages and industrial switching applications demanding high V_CEO, low saturation voltage, and repeatable gain characteristics.

FAQ

What is the maximum junction temperature rating for the 2SC3143-4-TB-E?

The 2SC3143-4-TB-E has a maximum junction temperature (T_j) of 125°C, as specified in its Absolute Maximum Ratings table. This rating defines the upper thermal limit for safe continuous operation; exceeding it risks permanent degradation of h_FE, increased leakage, or bond-wire failure. Thermal design must ensure T_j remains ≤125°C under worst-case ambient and power dissipation conditions.

Does the 2SC3143-4-TB-E have a specified avalanche energy rating?

No, the 2SC3143-4-TB-E datasheet does not specify an avalanche energy (E_AS) rating. While its V_OBC = −180 V and rugged SOA support limited unclamped inductive switching, SANYO does not guarantee repetitive avalanche capability. For designs subject to inductive transients, external clamping (e.g., TVS diodes or RCD snubbers) is required to protect the 2SC3143-4-TB-E.

How is the "-4" suffix in 2SC3143-4-TB-E defined?

The "-4" in 2SC3143-4-TB-E denotes h_FE Rank 4, corresponding to a DC current gain range of 180–290 measured at I_C = −10 mA and V_CE = −5 V. This binning ensures consistent gain behavior across units, critical for matched-pair amplifier designs and stable bias networks where gain variation must be tightly controlled.

Can the 2SC3143-4-TB-E be used in parallel configurations?

Yes, the 2SC3143-4-TB-E can be paralleled, but only with careful attention to emitter ballasting resistors (typically 0.1–0.47 Ω) and matched h_FE bins (e.g., all Rank 4 units). Its positive temperature coefficient of V_BE aids current sharing, but thermal coupling and layout symmetry are essential to prevent thermal runaway. Derate total current by ≥20% versus single-device rating.

What is the typical output capacitance (C_ob) of the 2SC3143-4-TB-E at V_CB = −10 V?

The typical output capacitance (C_ob) of the 2SC3143-4-TB-E is 2.4 pF at V_CB = −10 V and f = 1 MHz, as confirmed in the Electrical Characteristics table and ITR03136/ITR03137 graphs. This low value directly contributes to reduced Miller feedback and improved high-frequency stability in amplifier and switching applications.