Diodes Incorporated BS170FTC

Overview

BS170FTC from Diodes Incorporated is an N-channel enhancement-mode vertical DMOS FET in SOT-23 package, rated for 60 V V_DS, 5 Ω R_DS(on) at V_GS = 10 V and I_D = 200 mA, with 330 mW power dissipation at T_amb = 25°C; used in low-power switching and signal routing in portable electronics and interface logic.

For engineers reviewing the BS170FTC datasheet, BS170FTC pinout, BS170FTC application, or BS170FTC equivalent, key selection criteria include verified V_GS(th) range (0.8–3 V), pulsed drain current capability (3 A), gate leakage (≤10 nA), and thermal limits (−55 to +150°C junction temperature).

Technical Context

This discrete MOSFET operates in enhancement mode with a vertical DMOS structure optimized for low-voltage, low-current switching. Its gate threshold voltage (0.8–3 V) enables direct drive from 3.3 V or 5 V logic, while the 60 V V_DS rating supports operation across industrial and consumer supply rails up to 48 V.

Switching performance is characterized by 10 ns turn-on and turn-off delay times under defined test conditions (V_DD ≈ −15 V, I_D = 600 mA, 50 Ω source impedance), and input capacitance of 60 pF at V_DS = 10 V, supporting moderate-speed digital switching up to ~10 MHz.

Key Specifications

Pinout & Package

SOT-23 plastic surface-mount package with gull-wing leads; compact footprint (2.9 × 1.3 × 1.0 mm), thermally enhanced for low-power dissipation.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-power N-channel switching applications.

Compared with 2N7002K-T1-E3 and ZVN3306F, BS170FTC offers higher R_DS(on) but broader V_GS(th) tolerance (0.8–3 V), making it more robust against marginal gate drive in legacy or noise-prone systems.

Availability

BS170FTC is available at Aetrix Electronics and suitable for LED switching, logic-level routing, and low-power load control requiring stable component supply across consumer, industrial, and medical device production programs.

Supply support for BS170FTC 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, headquartered in Plano, Texas, with design and manufacturing operations across Asia and the Americas.

BS170FTC belongs to Diodes' general-purpose discrete MOSFET product line, engineered for cost-sensitive, low-power switching in portable and interface applications where reliability and footprint efficiency are critical.

FAQ

Is BS170FTC suitable for 3.3 V logic-level gate drive?

Yes. With a gate threshold voltage range of 0.8–3 V and guaranteed turn-on at V_GS = 3.3 V, BS170FTC reliably conducts when driven directly from standard 3.3 V microcontroller GPIO pins without level shifting.

What is the maximum continuous drain current at 70°C ambient?

At T_amb = 70°C, the continuous drain current is derated to approximately 0.11 mA based on the 330 mW power dissipation limit and thermal resistance of the SOT-23 package, assuming no additional copper pour or airflow.

Can BS170FTC replace BS170 in existing designs?

Yes. BS170FTC is a tape-and-reel variant of the BS170 with identical electrical specifications and SOT-23 packaging; the "TC" suffix denotes packaging format, not functional change, and pinout is fully compatible.

Does BS170FTC have built-in ESD protection?

No. BS170FTC does not integrate ESD protection diodes; external TVS or series resistors are recommended when exposed to human-handling or connector interfaces exceeding ±2 kV HBM.