Diodes Incorporated FMMT560TC

Overview

FMMT560TC from Diodes Incorporated is a 500V PNP high-voltage transistor in SOT23 package, designed for high-breakdown voltage switching in industrial power supplies and flyback converters. It delivers -150mA continuous collector current, -500V V_CEO, and supports peak pulse current up to -500mA with h_FE ≥100 at -1mA and ≥15 at -100mA.

For engineers reviewing the FMMT560TC datasheet, FMMT560TC pinout, FMMT560TC application, or FMMT560TC equivalent, key selection criteria include high-voltage blocking capability (-500V), thermal resistance (R_θJA = 250°C/W), safe operating area under pulsed conditions, and AEC-Q101 qualification for automotive-grade reliability.

Technical Context

This PNP bipolar junction transistor operates with emitter-grounded configuration and supports high-voltage off-state blocking while maintaining stable DC current gain across -1mA to -100mA. Its f_T of 60MHz enables moderate-speed switching in SMPS feedback and gate drive circuits.

The device features low V_CE(SAT) (-200mV at -20mA/-2mA) and -500mV at -50mA/-10mA, enabling efficient conduction in high-side switch configurations. ESD ratings of 4kV HBM and 400V MM support robust handling in automated assembly environments.

Key Specifications

Pinout & Package

Package: SOT23 - surface-mount plastic package with matte tin-plated leads, UL 94V-0 rated, 0.008g weight, moisture sensitivity level 1.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZTX653 and BC807-40, FMMT560TC uniquely balances -500V breakdown with SOT23 footprint and automotive qualification-enabling compact, reliable HV switching where alternatives either under-rate voltage or over-specify gain at the expense of ruggedness.

Availability

FMMT560TC is available at Aetrix Electronics and suitable for industrial power supplies, automotive lighting control, telecom line interface protection, and high-voltage sensor biasing requiring stable component supply and long-term lifecycle continuity.

Supply support for FMMT560TC 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.

The FMMT series targets high-reliability, high-voltage discrete transistors for power conversion, protection, and control in automotive, industrial, and telecom infrastructure applications.

FAQ

What is the maximum safe operating voltage for FMMT560TC in continuous DC mode?

The absolute maximum V_CEO is -500V at T_A = +25°C. Derating applies above +25°C: R_θJA = 250°C/W requires PCB thermal design to limit junction temperature. At 100°C ambient, maximum usable V_CEO drops to approximately -420V to maintain T_J ≤ 150°C with 15×15mm 1oz copper.

Can FMMT560TC replace FMMT560TA in an AEC-Q101-compliant design?

Yes-both FMMT560TC and FMMT560TA share identical electrical specifications, thermal characteristics, and AEC-Q101 qualification. The only difference is packaging: TC uses 13-inch reels (10,000 units), TA uses 7-inch reels (3,000 units). No layout or schematic changes are needed.

How does the -500mA I_CM rating translate to practical pulse handling capability?

The -500mA peak pulse current is specified under pulsed conditions (≤300µs pulse width, ≤2% duty cycle). In practice, this supports short-circuit protection triggering, inrush limiting, and transient clamping-provided PCB layout minimizes parasitic inductance and thermal mass prevents junction overheating during repeated pulses.

Is FMMT560TC suitable for linear amplifier applications?

No-it is optimized for switching operation. Its h_FE variation across collector current (100 at -1mA, 15 at -100mA) and relatively high V_CE(SAT) make it unsuitable for low-distortion analog amplification. Use only in saturated or active-region switching roles such as level shifting, current sinking, or HV gate driving.