onsemi 2SA1768T-AN

Overview

2SA1768T-AN from onsemi is a PNP bipolar junction transistor (BJT) designed for high-voltage switching in consumer power stages, featuring –160 V V_CEO, –0.7 A continuous I_C, and low –0.5 V typical V_CE(sat) at –250 mA/–25 mA drive. It employs MBIT process technology and targets color TV sound output and horizontal deflection converter/inverter circuits.

For engineers reviewing the 2SA1768T-AN datasheet, pinout, applications, or equivalent options, key selection criteria include verified –160 V breakdown rating, SC-71 (NMP) package compatibility, h_FE rank T (200–400 at –100 mA), fast 60 ns turn-on time, and Pb-free taping configuration per JEITA/SC-71 standard.

Technical Context

This PNP BJT operates in linear and saturated switching modes with guaranteed V_(BR)CEO = –160 V and V_(BR)CBO = –180 V under specified test conditions. Its f_T = 120 MHz and C_ob = 11 pF at –10 V support stable high-frequency switching in horizontal deflection and flyback converter drivers.

The device uses onsemi's MBIT (Mesa Bipolar Integrated Technology) process to achieve low V_CE(sat) (–0.2 to –0.5 V), fast switching (t_on = 60 ns, t_f = 60 ns), and robust thermal performance up to T_j = 150 °C - critical for compact TV power stage designs requiring reliability under pulsed load conditions.

Key Specifications

Pinout & Package

2SA1768T-AN is housed in the SC-71 (JEITA) / NMP surface-mount package, a 3-pin, single-transistor outline with gull-wing leads and tape-and-reel packaging (2,500 pcs./box). Mass: 0.275 g. Dimensions conform to JEDEC TO-236AB and JEITA SC-71 standards.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 2SA1768T-AN, 2SA1774T offers lower cost but sacrifices 40 V breakdown margin and 20 MHz bandwidth, while MJD2955T4G provides higher current capacity but cannot replace it in AC-line-referenced TV power stages due to its –60 V V_CEO limit.

Availability

2SA1768T-AN is available at Aetrix Electronics and suitable for color TV horizontal deflection circuits, analog audio output stages, and isolated DC–DC converters requiring stable component supply, full traceability, and RoHS-compliant packaging.

Supply support for 2SA1768T-AN 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power management, analog, sensor, and connectivity solutions for automotive, industrial, and consumer markets.

The 2SA1768T-AN belongs to onsemi's legacy high-voltage bipolar transistor product line, engineered specifically for reliability-critical horizontal deflection and audio output applications in analog television systems.

FAQ

What is the h_FE range for 2SA1768T-AN?

The 2SA1768T-AN is ranked "T", specifying DC current gain h_FE between 200 and 400 when measured at V_CE = –5 V and I_C = –100 mA. This tighter binning ensures predictable base drive requirements in production TV chassis designs. The 2SA1768T-AN data sheet confirms this range excludes outliers and applies across the full operating temperature range from –25 °C to +75 °C.

Is 2SA1768T-AN RoHS compliant?

Yes, the 2SA1768T-AN is Pb-free and RoHS compliant, as confirmed by its "VR" marking suffix and packaging specification (NMP taping). The device meets EU Directive 2011/65/EU and is shipped in tape-and-reel format with 2,500 units per box. The 2SA1768T-AN manufacturing process and material declarations are documented in onsemi's official compliance reports.

What is the maximum pulsed collector current for 2SA1768T-AN?

The 2SA1768T-AN supports a peak collector current I_CP of –1.5 A under pulse conditions (10 ms pulse width, 10% duty cycle), as specified in its Absolute Maximum Ratings table. This rating enables short-duration surge handling in horizontal deflection retrace and flyback reset events. The 2SA1768T-AN must be operated within its SOA limits when applying pulsed loads.

Can 2SA1768T-AN replace 2SA1768S-AN in existing designs?

Yes - the 2SA1768T-AN is a direct functional replacement for 2SA1768S-AN, sharing identical package (NMP/SC-71), pinout, absolute maximum ratings, and electrical characteristics except for h_FE binning (S: 140–280 vs. T: 200–400). No PCB or schematic changes are required. The 2SA1768T-AN provides higher minimum gain, improving noise immunity in base-driven switching applications.

What thermal derating applies to 2SA1768T-AN above 25 °C?

The 2SA1768T-AN has a thermal resistance θ_JA of approximately 125 °C/W (calculated from P_C = 1 W at T_a = 25 °C and T_j(max) = 150 °C). Derating begins linearly above 25 °C ambient: maximum allowable power decreases by ~8 mW/°C. At 75 °C ambient, usable P_C drops to ~0.6 W. The 2SA1768T-AN datasheet provides full PC–Ta derating curves in Figure 7.