STMicroelectronics STX715-AP

Overview

STX715-AP from STMicroelectronics is an NPN bipolar junction transistor in TO-92-AP package, rated for 80 V V_CEO, 1.5 A I_C, and 0.9 W P_TOT at 25 °C ambient; it delivers h_FE ≥ 140 at 100 µA I_C, supports relay driving and linear voltage regulation in low-voltage industrial control circuits.

For engineers reviewing the STX715-AP datasheet, STX715-AP pinout, STX715-AP application, or STX715-AP equivalent, key selection criteria include V_CEO = 80 V, I_C = 1.5 A, V_CE(sat) ≤ 0.5 V at 1 A/100 mA, h_FE range (40–140), and TO-92 mechanical compatibility for through-hole assembly.

Technical Context

The STX715-AP operates as a general-purpose NPN switching and amplification device with planar epitaxial construction. Its ruggedness is confirmed by 140 V V_CBO, 2 A I_CM, and 150 °C T_J(max), enabling reliable operation under transient overvoltage and short-duration surge conditions.

It exhibits defined saturation behavior: V_CE(sat) = 0.25 V (100 mA/10 mA) and 0.5 V (1 A/100 mA); f_T = 50 MHz at 100 mA/10 V confirms suitability for medium-speed switching up to several megahertz.

Key Specifications

Pinout & Package

STX715-AP is housed in TO-92-AP (ammopack) plastic package: 4.95 mm height, 4.95 mm width, 15.49 mm length, with standard lead spacing and orientation per JEDEC TO-92 outline.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC337-40 and MJD127, STX715-AP uniquely balances 80 V blocking, 1.5 A current, TO-92 through-hole compatibility, and proven ruggedness - making it optimal for cost-sensitive, medium-power industrial controls where package and reliability constraints are fixed.

Availability

STX715-AP is available at Aetrix Electronics and suitable for voltage regulation, relay driving, and generic switching applications requiring stable component supply, long-term manufacturability, and RoHS-compliant through-hole assembly.

Supply support for STX715-AP 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 devices, and MEMS sensors for industrial, automotive, and consumer markets.

The STX715 belongs to ST's general-purpose bipolar transistor product line, engineered for robust, cost-effective switching and amplification in industrial control, power management, and legacy system upgrades.

FAQ

What is the maximum safe operating temperature for STX715-AP?

The STX715-AP has a maximum junction temperature (T_J) of 150 °C and storage temperature range of –65 to +150 °C. Derating begins above 25 °C ambient per R_thJA = 140 °C/W; at 70 °C ambient, maximum usable power drops to ~0.5 W to maintain T_J ≤ 150 °C.

Is STX715-AP suitable for PWM motor control?

Yes - with limitations. Its f_T = 50 MHz and V_CE(sat) ≤ 0.5 V support PWM frequencies up to ~5 MHz, but thermal limits (0.9 W P_TOT) restrict average current to ≤ 800 mA at 25 °C. For sustained 1 A PWM, forced airflow or PCB copper pour is required.

Does STX715-AP have built-in ESD protection?

No - the STX715-AP is a bare silicon bipolar transistor without integrated ESD structures. External protection (e.g., series base resistor + TVS diode to ground) is recommended in handling and PCB layout, especially in environments with >2 kV HBM exposure risk.

How does the "-AP" suffix affect electrical performance?

The "-AP" suffix denotes ammopack tape-and-reel shipment format (per Doc ID 8654 Rev 3 mechanical data), not electrical differentiation. Electrical specs, thermal ratings, and pinout are identical to STX715 in bag packaging; only mechanical handling and reel dimensions differ.