onsemi 2SC3116S

Overview

2SC3116S from SANYO is an NPN epitaxial planar silicon transistor designed for high-voltage switching applications, with V_CEO = −160 V, I_C = −700 mA, P_C = 1 W at T_C = 25 °C, f_T = 110 MHz, and h_FE ≥ 100 at I_C = −100 mA - used in color TV sound output stages and DC-DC converter switching circuits.

For engineers reviewing the 2SC3116S datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, TO-126 package mapping, switching timing behavior, h_FE binning details, and direct alternatives for industrial power switching design validation.

Technical Context

The 2SC3116S employs SANYO's MBIT (Mesa-Bipolar Integrated Technology) process to achieve high breakdown voltage and stable gain across temperature. Its common-emitter configuration supports fast turn-on/turn-off with t_ON = 60 ns and t_OFF = 900 ns under pulsed conditions (I_C = −300 mA, V_CE = −5 V).

It operates in linear and saturated switching modes with V_CE(sat) = −0.6 V at I_C = −500 mA and I_B = −50 mA, and exhibits Cob = 11 pF at V_CB = −10 V, f = 1 MHz - confirming suitability for medium-frequency hard-switching topologies.

Key Specifications

Pinout & Package

SANYO specifies TO-126 package for 2SC3116S: molded plastic case with metal tab (collector-connected), 3-pin vertical lead configuration, 3.0 mm lead pitch, and 15.5 mm × 10.0 mm footprint - compatible with standard through-hole PCB mounting and heat transfer via tab screw-down.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN switching transistor applications.

Compared with 2SC3116S, 2SC2625 offers lower cost but sacrifices 40 V breakdown headroom and 200 mA current capacity - limiting use in universal-input power supplies; MJD112 trades voltage margin for current and thermal headroom, necessitating mechanical redesign but enabling higher-power relay or motor drive.

Availability

2SC3116S is available at Aetrix Electronics and suitable for color TV repair, DC-DC converter manufacturing, and industrial relay driver assembly requiring stable component supply and long-term obsolescence support.

Supply support for 2SC3116S 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 discrete devices, analog ICs, and optoelectronics before its acquisition by Panasonic in 2012.

The 2SC3116S belongs to SANYO's legacy high-voltage bipolar transistor family engineered for reliability in consumer power electronics - particularly CRT-based video equipment and offline switching power supplies.

FAQ

What is the maximum collector-emitter voltage rating for 2SC3116S?

The 2SC3116S has a guaranteed V_CEO rating of −160 V at T_A = 25 °C. This absolute maximum rating applies under open-base conditions and defines the upper limit for safe operation in switching circuits with inductive loads or line-referred transients. Exceeding this voltage risks avalanche breakdown and permanent device failure. The 2SC3116S must not be used in life-support or aircraft control systems per SANYO's safety disclaimer.

Is 2SC3116S pin-compatible with 2SA1248?

No - 2SC3116S is an NPN transistor while 2SA1248 is its complementary PNP counterpart; both share identical TO-126 packaging and pinout (Emitter-Collector-Base), but polarity reversal means they cannot substitute directly. Using 2SC3116S in place of 2SA1248 would reverse current flow and prevent circuit operation. The 2SC3116S datasheet explicitly groups them for paired design use, not interchangeability.

What is the typical DC current gain (h_FE) of 2SC3116S at 100 mA collector current?

The 2SC3116S is binned for h_FE = 100–400 at V_CE = −5 V and I_C = −100 mA, with three standard gain groups: 100–200, 140–280, and 200–400. This wide spread reflects manufacturing tolerance and requires circuit design to accommodate minimum h_FE = 100 for reliable saturation. The 2SC3116S does not specify a single typical value - designers must verify gain in-circuit using worst-case base drive.

Can 2SC3116S be used in linear amplifier applications?

The 2SC3116S is characterized and optimized for switching operation, not linear amplification. While it can operate in active region, its h_FE variation with I_C and temperature, lack of specified linearity parameters (e.g., THD, f_T flatness), and thermal limitations (P_C = 1 W) make it unsuitable for high-fidelity analog stages. The 2SC3116S datasheet lists "switching applications" exclusively and provides no small-signal AC parameters beyond f_T and Cob.

What is the thermal resistance from junction to case (R_θJC) for 2SC3116S?

SANYO does not publish R_θJC for the 2SC3116S in the provided documentation. However, based on TO-126 package construction and thermal curves (PC vs. Ta), the effective R_θJA is approximately 120 °C/W with no heatsink and improves to ~30 °C/W with ideal heatsinking. For thermal design, assume R_θJC ≈ 5–8 °C/W - consistent with similar TO-126 transistors - and verify junction temperature using measured case temperature and 2SC3116S power dissipation in actual layout.