Diodes Incorporated ZTX796ASTOA

Overview

ZTX796ASTOA from Diodes Incorporated is a 200V PNP medium-power high-gain transistor in E-Line (TO-92 compatible) package, rated for -0.5A continuous collector current, -200V V_CEO, and 1W power dissipation at T_A = 25°C. It delivers h_FE ≥ 250 at I_C = -0.3A and operates up to +200°C junction temperature, supporting high-reliability industrial switching and voltage regulation circuits.

For engineers reviewing the ZTX796ASTOA datasheet, ZTX796ASTOA pinout, ZTX796ASTOA application, or ZTX796ASTOA equivalent, key selection criteria include its -200V breakdown rating, high DC current gain stability under load, thermal robustness to +200°C, and AEC-Q101 qualification for automotive-grade reliability assurance.

Technical Context

This PNP bipolar junction transistor is optimized for medium-voltage linear and switching applications where high BV_CEO (-200V), stable h_FE (300–800 across I_C = -10mA to -400mA), and low V_CE(sat) (-0.2mV to -0.3mV) are critical. Its f_T of 100MHz supports moderate-speed switching up to ~100kHz with controlled turn-on/turn-off times (t_on ≤ 100ns, t_off ≤ 3200ns).

The device uses a molded plastic E-Line package with matte tin-plated leads, UL 94V-0 flammability rating, and thermal resistance R_θJA = 175°C/W (min pad layout) or 116°C/W (enhanced copper layout), enabling operation in thermally constrained environments without active cooling.

Key Specifications

Pinout & Package

E-Line (TO-92 compatible) package with straight leads, molded green plastic case, UL 94V-0 rating, and matte tin-plated terminals solderable per MIL-STD-202 Method 208.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZTX796ASTOA, ZTX753 trades voltage capability for cost in lower-voltage designs, while MJD2955T4G offers massive current headroom at the expense of voltage rating and package compatibility-neither serves as a drop-in replacement, but both address adjacent design constraints.

Availability

ZTX796ASTOA is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive lamp driving, high-voltage relay interfacing, and overvoltage protection circuits requiring stable component supply and long-term lifecycle continuity.

Supply support for ZTX796ASTOA 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, industry-qualified components for automotive, industrial, and computing markets.

The ZTX series targets medium-power bipolar transistors for high-voltage linear and switching applications, emphasizing ruggedness, gain consistency, and AEC-Q101 compliance in compact through-hole packages.

FAQ

What is the maximum safe operating voltage for ZTX796ASTOA in continuous DC applications?

The ZTX796ASTOA is rated for V_CEO = -200V and V_CBO = -200V, meaning it can safely block up to 200V DC between collector and emitter or collector and base under steady-state conditions at T_A ≤ 25°C. Derating is required above 25°C ambient per the datasheet's thermal curves, and layout must maintain minimum creepage/clearance per IPC-2221 for high-voltage safety.

Does ZTX796ASTOA require a heatsink in standard PCB mounting?

No heatsink is required for ZTX796ASTOA at I_C ≤ 0.3A and T_A ≤ 50°C when mounted on a minimum recommended pad layout (12mm lead length, FR4 board). At full 0.5A continuous current, thermal resistance rises to 175°C/W; junction temperature remains within +200°C limit only if ambient stays below ~45°C with still air.

How does the AEC-Q101 qualification impact ZTX796ASTOA's use in non-automotive applications?

AEC-Q101 qualification subjects ZTX796ASTOA to accelerated stress tests (HTOL, TC, HTRB, etc.) beyond standard industrial requirements, resulting in proven reliability for 15+ years in harsh environments. This makes it especially valuable in industrial, medical, and aerospace applications where field failure risk must be minimized-even outside automotive contexts.

Can ZTX796ASTOA be used as a direct replacement for ZTX795A?

No. While both are E-Line PNP transistors, ZTX795A has V_CEO = -120V and h_FE = 100–300, making it unsuitable for 200V applications. Substituting ZTX796ASTOA into a ZTX795A-designed circuit may cause overdesign in gain and voltage margin but is electrically safe; however, layout and thermal validation are required due to differing saturation characteristics and thermal resistance profiles.