STMicroelectronics 2STW1693

Overview

2STW1693 from STMicroelectronics is a high-power PNP epitaxial planar bipolar transistor designed for audio power amplifier output stages, featuring V_CEO = −80 V, I_C = −6 A, f_T = 20 MHz, R_thj-case = 2.08 °C/W, and V_CE(sat) = −0.6 V at I_C = −2 A / I_B = −200 mA - deployed in 40–70 W hi-fi amplifiers.

For engineers reviewing the 2STW1693 datasheet, 2STW1693 pinout, 2STW1693 application, or 2STW1693 equivalent, key selection criteria include complementary pairing with 2STW4466, junction temperature rating up to 150 °C, low saturation voltage under high-current pulsed operation, and TO-247 thermal performance validated at T_c = 125 °C.

Technical Context

This PNP bipolar transistor uses base island layout in low-voltage planar epitaxial process to achieve linear h_FE response and low V_CE(sat) across its operating range. It is fully characterized at case temperatures up to 125 °C, supporting robust thermal design in Class AB audio output stages.

The device exhibits DC current gain (h_FE) of 50–120 at I_C = −2 A / V_CE = −4 V, transition frequency of 20 MHz at I_C = −0.5 A / V_CE = −12 V, and collector-base capacitance of 80 pF at V_CB = −10 V / f = 1 MHz - enabling stable wideband audio amplification with minimal phase shift.

Key Specifications

Pinout & Package

Delivered in TO-247 package: isolated metal tab (collector), vertical mounting with screw-hole centerline, JEDEC-standard 3-lead outline, ECOPACK® lead-free second-level interconnect, and 14.2–14.8 mm lead length (L).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MJE15034 and BDW93C, the 2STW1693 offers superior bandwidth-to-thermal-resistance ratio and factory-validated linearity at elevated temperature - making it the preferred choice for high-fidelity, thermally constrained audio output stages demanding consistent THD performance.

Availability

2STW1693 is available at Aetrix Electronics and suitable for hi-fi audio amplifiers, professional mixer output stages, public address systems, and instrument amplifiers requiring stable component supply and documented thermal performance at 125 °C.

Supply support for 2STW1693 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, designing and manufacturing analog, digital, and mixed-signal ICs, discrete power devices, and MEMS sensors.

The 2STW1693 belongs to ST's high-power bipolar transistor product line, engineered specifically for linear audio power amplification with emphasis on gain stability, low saturation voltage, and thermal reliability in compact enclosures.

FAQ

Is the 2STW1693 still in active production?

No - STMicroelectronics has marked the 2STW1693 as Obsolete Product(s) per its official datasheet revision history (Rev 2, October 2008). Aetrix Electronics maintains legacy inventory with full traceability and supports design continuity through controlled allocation and cross-reference guidance for qualified replacements.

What is the correct mounting orientation for the TO-247 package?

The metal tab (Pin 1) is the collector and must be electrically isolated from the heatsink unless the circuit design intentionally references collector to chassis ground. Mount using mica or silicone insulator plus thermal grease; torque screw to 0.5–0.7 N·m to ensure mechanical stability without cracking the package.

Can the 2STW1693 be used in parallel configurations?

Yes - its base island layout and tight h_FE distribution (50–120) support current sharing in parallel output stages. Use individual emitter resistors (0.1–0.22 Ω) and matched base drive to ensure balanced conduction; derate total power by 20% to accommodate thermal coupling between devices.

Does the 2STW1693 require external compensation in audio amplifier circuits?

No external compensation is required for standard Class AB configurations. Its 20 MHz f_T and 80 pF C_CBO provide inherent stability with typical feedback networks (e.g., 22 kΩ/220 pF Miller compensation); however, layout-induced parasitics above 5 MHz may necessitate localized RC snubbing at the collector node.