Diodes Incorporated FMMTL720TC

Overview

FMMTL720TC from ON Semiconductor is a PNP silicon planar medium-power transistor in SOT-23 package, rated for V_CEO = −40 V, I_C = −1 A, and P_tot = 500 mW at T_amb = 25°C; features h_FE ≥ 300 at I_C = −10 mA, V_CE = −5 V, and V_CE(sat) = −150 mV at I_C = −500 mA, I_B = −20 mA - used in low-voltage DC-DC converter bias circuits and load switching in industrial control modules.

For engineers reviewing the FMMTL720TC datasheet, FMMTL720TC pinout, FMMTL720TC application, or FMMTL720TC equivalent, key selection criteria include verified PNP saturation voltage under pulsed I_C = −1 A, guaranteed h_FE minimum across I_C = −10 mA to −1 A, thermal derating above 25°C, and SOT-23 terminal compatibility with automated placement systems.

Technical Context

This device operates as a medium-power PNP bipolar junction transistor with planar silicon construction, optimized for linear amplification and saturated switching in low-to-moderate current paths. Its breakdown ratings (V_CEO = −40 V, V_EBO = −5 V) and pulsed I_CM = −1.5 A support robust operation in transient-prone industrial power rails.

The transistor delivers h_FE = 490 (typ.) at I_C = −10 mA and maintains h_FE ≥ 75 at I_C = −1 A, V_CE = −2 V, enabling stable current gain across wide collector current range. f_T is specified at 100 MHz under I_C = −50 mA, V_CE = −10 V, confirming suitability for high-speed switching up to ~10–20 MHz practical duty-cycle applications.

Key Specifications

Pinout & Package

Package: SOT-23 (TO-236AB), surface-mount, 3-terminal plastic case with standardized footprint per JEDEC MO-178.

Key Features

Applications

Equivalent & Alternatives

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

Compared with MMBT720 (identical function, packaging variant) and DXT720 (higher voltage rating, reduced h_FE at full current), FMMTL720TC offers optimal balance of gain stability, saturation performance, and thermal margin for 12–15 V embedded switching where strict legacy compliance is required.

Availability

FMMTL720TC is available at Aetrix Electronics and suitable for industrial power sequencing, low-voltage DC-DC bias control, and automotive body control module load switching requiring stable component supply and long-term manufacturability.

Supply support for FMMTL720TC 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

ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, and discrete devices for automotive, industrial, and cloud power applications.

FMMTL720TC belongs to ON Semiconductor's general-purpose PNP transistor product line, designed specifically for cost-sensitive, medium-current switching and amplification in space-constrained industrial and automotive PCBs.

FAQ

What is the maximum allowable junction temperature for FMMTL720TC?

The absolute maximum junction temperature is +150°C, consistent with its storage temperature rating. Derating begins at T_amb > 25°C per the published thermal resistance curve (R_θJA ≈ 250°C/W), requiring PCB copper area or airflow management to sustain 500 mW dissipation above ambient.

Is FMMTL720TC suitable for linear amplifier operation?

Yes - its h_FE stability across I_C = −10 mA to −1 A and low V_CE(sat) support Class-A and AB amplifier topologies. However, f_T is not guaranteed; typical 100 MHz at −50 mA limits usable bandwidth to ≤20 MHz for low-distortion small-signal amplification.

Does FMMTL720TC have AEC-Q101 qualification?

No - FMMTL720TC is not AEC-Q101 qualified. It meets industrial-grade reliability standards but lacks automotive-specific stress testing (e.g., HTOL, temperature cycling). For automotive BCM use, system-level validation is required per OEM requirements.

Can FMMTL720TC replace BC807 in existing designs?

Only with verification: BC807 has V_CEO = −45 V and h_FE = 160–400, while FMMTL720TC offers tighter h_FE min (300) but lower V_CEO (−40 V). Layout compatibility is confirmed (SOT-23), but voltage margin and gain consistency at I_C > −500 mA must be re-evaluated.