onsemi MPS6725RLRPG

Overview

MPS6725RLRPG from onsemi is an NPN silicon Darlington transistor in a Pb-free TO-92 package, rated for 50 V_CEO, 1 A continuous collector current, and 1.0 W dissipation at T_A = 25°C. It delivers high DC current gain (h_FE = 4,000–40,000 at I_C = 1 A), low V_CE(sat) ≤ 1.5 V, and operates across −55°C to +150°C - used in relay drivers, lamp dimmers, and low-frequency switching power supplies.

For engineers reviewing the MPS6725RLRPG datasheet, pinout, applications, or equivalent options, key selection criteria include safe operating area (SOA) limits, thermal resistance (R_JA = 125°C/W), V_BE(on) ≤ 2.0 V, f_T up to 1000 MHz, and Pb-free TO-92 tape-and-ammo packaging compatibility.

Technical Context

The MPS6725RLRPG integrates two cascaded NPN transistors in a monolithic Darlington configuration, enabling high current amplification with single-base control. Its design supports linear and saturated switching modes, with guaranteed V_(BR)CES = 50 V and V_(BR)CBO = 60 V under specified test conditions.

Thermal performance is defined by R_JC = 50°C/W and R_JA = 125°C/W, requiring heatsinking or PCB copper area for sustained 1 A operation. The device exhibits C_cb ≤ 10 pF at V_CB = 10 V and f = 1 MHz, limiting high-frequency switching use but supporting audio and power control applications.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-10, Style 1), Pb-free, straight-lead configuration. Dimensions comply with ON Semiconductor standard outline 98AON52857E.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar Darlington transistor applications.

Compared with MPS6725RLRPG, MPS6725RLRA offers identical performance in reel format for pick-and-place, while ULN2003A provides multi-channel integration at lower per-channel current - making MPS6725RLRPG optimal for discrete high-current single-load switching where layout simplicity and thermal headroom are critical.

Availability

MPS6725RLRPG is available at Aetrix Electronics and suitable for relay driver circuits, lamp dimming controls, and DC motor speed regulation requiring stable component supply, RoHS compliance, and TO-92 Pb-free packaging.

Supply support for MPS6725RLRPG 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

onsemi (formerly ON Semiconductor) is a global semiconductor supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.

The MPS6724/MPS6725 family was designed as general-purpose, high-gain Darlington transistors for cost-sensitive, medium-power linear and switching applications - emphasizing ruggedness, wide temperature range, and Pb-free manufacturability.

FAQ

What is the maximum continuous collector current rating for the MPS6725RLRPG?

The MPS6725RLRPG is rated for 1000 mA (1 A) continuous collector current at T_A = 25°C. Derating is required above this temperature at 8 mW/°C. At higher ambient temperatures or with limited PCB copper area, actual usable current drops - for example, to ~600 mA at 70°C ambient with typical board layout.

Does the MPS6725RLRPG have built-in base-emitter resistors or protection diodes?

No, the MPS6725RLRPG is a bare Darlington pair without internal base-emitter resistors or clamp diodes. External components - such as a base resistor for current limiting and a flyback diode across inductive loads - must be added per application requirements to ensure safe operation and prevent damage from back-EMF or overdrive.

What is the safe operating area (SOA) limitation for the MPS6725RLRPG at DC operation?

At DC operation, the MPS6725RLRPG's SOA is bounded by thermal limits (1.0 W at T_A = 25°C), second breakdown (visible in Figure 1), and voltage/current boundaries. For example, it supports 500 mA at 40 V only for pulse durations ≤100 ms - continuous operation above 10 V × 100 mA exceeds thermal limits without heatsinking.

How does the MPS6725RLRPG differ from the MPS6724RLRPG?

The MPS6725RLRPG has higher voltage ratings than the MPS6724RLRPG: V_CEO = 50 V vs. 40 V, and V_CBO = 60 V vs. 50 V. All other parameters - including h_FE, V_CE(sat), package, and pinout - are identical. The MPS6725RLRPG is selected when higher off-state blocking capability is required.

Is the MPS6725RLRPG suitable for high-frequency switching applications?

The MPS6725RLRPG is not optimized for high-frequency switching. While its f_T reaches up to 1000 MHz, its Darlington structure introduces significant storage time and slow turn-off characteristics. It is best suited for frequencies below 100 kHz - such as in lamp dimmers, relay drivers, and linear regulators - not RF or SMPS primary-side switching.