Diodes Incorporated FZT853TC

Overview

FZT853TC from Diodes Incorporated is a 100V NPN medium-power transistor in SOT223 package, designed for high-current switching in industrial power supplies and motor control circuits. It delivers 6A continuous collector current, supports 10A peak pulse current, achieves V_CE(SAT) < 150mV at 2A, maintains h_FE ≥ 50 up to 10A, and features R_CE(SAT) = 50mΩ for low conduction loss.

For engineers reviewing the FZT853TC datasheet, FZT853TC pinout, FZT853TC application, or FZT853TC equivalent, key selection criteria include its AEC-Q101 qualification, high-voltage breakdown (BV_CEO = 100V), thermal resistance (R_θJA = 42°C/W on 52mm×52mm 2oz Cu), and complementary pairing with FZT953 in H-bridge designs.

Technical Context

This NPN bipolar junction transistor operates as a high-voltage, medium-power switch with BV_CEO = 100V and BV_CBO = 200V, enabling use in 48V–100V DC bus applications. Its h_FE remains ≥20 at 10A (V_CE = 2V), supporting stable gain under heavy load conditions.

V_CE(SAT) is specified at 14–150mV across 100mA–2A drive levels, and f_T = 130MHz ensures adequate bandwidth for PWM switching up to several hundred kHz. ESD robustness (HBM = 8kV) and moisture sensitivity level 1 support automated assembly and harsh-environment deployment.

Key Specifications

Pinout & Package

Package: SOT223 - surface-mount plastic package with exposed collector lead (pin 3) for enhanced thermal performance; case weight ≈ 0.112g; UL 94V-0 rated molding compound.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar NPN medium-power transistor applications.

Compared with ZXTN25050DFH and MJD127G, FZT853TC uniquely balances AEC-Q101 compliance, SOT223 thermal efficiency (R_θJA = 42°C/W), and 6A/100V capability-making it optimal for automotive body electronics and compact industrial power stages where qualification, size, and thermal performance intersect.

Availability

FZT853TC is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and motor drive half-bridges requiring stable component supply and AEC-Q101 assurance.

Supply support for FZT853TC 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, manufacturing, and sales operations across Asia, Europe, and North America.

FZT853TC belongs to Diodes' high-reliability bipolar transistor product line, engineered specifically for automotive and industrial switching applications demanding robust voltage ratings, thermal efficiency, and AEC-Q101 validation.

FAQ

Is FZT853TC pin-compatible with FZT953?

No, FZT853TC (NPN) and FZT953 (PNP) are complementary devices with reversed pinouts: FZT853 uses E-B-C (pins 1–2–3), while FZT953 uses C-B-E. They are intended for matched-pair use in push-pull or H-bridge topologies but require separate PCB footprints and routing.

What is the maximum allowable junction temperature for continuous operation?

The FZT853TC has a maximum junction temperature (T_J) of +150°C. At ambient temperatures up to +85°C, sustained 6A operation requires thermal design ensuring R_θJA ≤ 10.8°C/W - achievable only with large copper pours or external heatsinking beyond the standard 52mm×52mm 2oz Cu reference layout.

Can FZT853TC be used in linear regulator applications?

Yes - its low V_CE(SAT) and stable h_FE up to 10A make it suitable as a pass transistor in adjustable linear regulators. However, power dissipation must be strictly limited: at 2A output and 5V dropout, P_D = 10W exceeds its 3.0W rated PD, requiring active cooling or derating to ≤0.6A for unheatsinked use.

Does FZT853TC require gate/base resistors in switching applications?

Yes - a series base resistor is mandatory to limit I_B and ensure proper saturation. For 5A I_C, h_FE ≥ 20 implies minimum I_B ≥ 250mA; with V_BE(SAT) ≈ 1.2V, a 10Ω resistor from a 3.3V logic driver provides ~230mA, achieving near-optimal saturation without excessive base drive loss.