Diodes Incorporated FMMT596TC

Overview

FMMT596TC from Zetex Semiconductors is a PNP silicon planar high-voltage transistor in SOT-23 package, rated for V_CEO = −200 V, V_CBO = −220 V, and continuous I_C = −300 mA. It delivers V_CE(sat) = −0.2 V at I_C = −100 mA / I_B = −10 mA and supports f_T = 150 MHz, enabling use in high-voltage switching and pulse amplification circuits in industrial power supplies.

For engineers reviewing the FMMT596TC datasheet, FMMT596TC pinout, FMMT596TC application, or FMMT596TC equivalent, key selection criteria include verified high-voltage blocking capability (−200 V V_CEO), low saturation voltage under defined drive conditions, gain stability across temperature (h_FE ≥ 85 at I_C = −250 mA), and SOT-23 thermal performance with P_tot = 500 mW at T_amb = 25°C.

Technical Context

This PNP transistor employs a planar silicon structure optimized for high-voltage breakdown and fast switching. Its V_(BR)CEO = −200 V and V_(BR)CBO = −220 V are validated under pulsed conditions (300 µs, 2% duty cycle), and its f_T = 150 MHz at I_C = −50 mA / V_CE = −10 V confirms RF-capable gain-bandwidth performance.

Switching behavior is characterized by t_d = 22 ns, t_r = 19 ns, t_s = 472 ns, and t_f = 70 ns at I_C = −200 mA / V_CC = −80 V, supporting high-speed on/off control in flyback and snubber circuits where safe operating area extends to 100 V and 1 A DC.

Key Specifications

Pinout & Package

Package: SOT-23 (3-lead plastic surface-mount). Dimensions per Zetex Issue 4 datasheet: D = 2.80–3.04 mm, E = 2.10–2.64 mm, E1 = 1.20–1.40 mm, L = 0.25–0.60 mm, b = 0.30–0.50 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with ZTX653 and MMBT5087, FMMT596TC provides the highest voltage blocking (−200 V), making it uniquely suitable for 100–200 V industrial and ignition applications where alternatives require redesign or derating.

Availability

FMMT596TC is available at Aetrix Electronics and suitable for industrial flyback power supplies, high-voltage gate driver stages, capacitive discharge ignition systems, and high-voltage pulse amplifiers requiring stable component supply and long-term lifecycle support.

Supply support for FMMT596TC 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

Zetex Semiconductors plc was a UK-based ISO 9001 and TS16949 certified manufacturer specializing in high-performance discrete semiconductors before its acquisition by Diodes Incorporated in 2008.

FMMT596TC belongs to Zetex's high-voltage bipolar transistor product line, engineered specifically for robust switching and amplification in industrial power conversion, ignition, and pulse generation where reliability at elevated DC voltages is critical.

FAQ

What is the maximum continuous collector current for FMMT596TC?

The maximum continuous collector current is −300 mA at T_amb = 25°C. Derating is required above 25°C ambient: linear reduction to zero at +150°C junction temperature, per the device's thermal resistance and power dissipation limit of 500 mW.

Does FMMT596TC support pulsed current operation beyond its DC rating?

Yes - peak pulse current I_CM is rated at −1 A under pulsed conditions (pulse width = 300 µs, duty cycle = 2%). This enables short-duration surge handling in ignition and snubber applications without thermal runaway.

How does the gain (h_FE) vary with collector current and temperature?

h_FE ranges from 100 at I_C = −1 mA to 85 at I_C = −250 mA (25°C), and remains ≥85 across −55°C to +100°C at I_C = −250 mA. At I_C = −400 mA, h_FE drops to 35, indicating reduced current gain near absolute maximum ratings.

Is FMMT596TC RoHS compliant and lead-free?

Yes - per Zetex's green compliance statement in the Issue 4 datasheet, all components including FMMT596TC are compliant with the EU RoHS directive, containing no restricted substances above threshold limits, and supporting customer compliance with WEEE and ELV directives.