onsemi MPS2907RLRM

Overview

MPS2907RLRM from ON Semiconductor (formerly Motorola) is a PNP silicon small-signal transistor in TO-92 package, rated for –40 V V_CEO, –600 mA I_C, and 625 mW P_D at T_A = 25°C. It delivers h_FE = 35–300 (depending on I_C), V_CE(sat) ≤ –0.4 V at I_C = –150 mA/I_B = –15 mA, and f_T = 200 MHz - enabling use in low-power linear amplification, active load switching, and discrete logic interface circuits.

For engineers reviewing the MPS2907RLRM datasheet, pinout, applications, or equivalent options, this page provides verified electrical specs, TO-92 terminal mapping, real-world use cases in analog signal conditioning and digital output buffering, and two validated alternative PNP transistors with documented parameter differences.

Technical Context

This device operates as a general-purpose PNP bipolar junction transistor with fixed-emitter biasing capability, supporting both linear amplification (V_CE ≥ –1 V) and saturated switching (V_CE(sat) ≤ –0.4 V). Its thermal resistance R_JA = 200 °C/W and R_JC = 83.3 °C/W define its power handling under ambient and case-cooled conditions.

The MPS2907RLRM exhibits low noise figure (NF ≈ 2–8 dB at 1 kHz, depending on I_C and source resistance), C_obo = 8.0 pF, and C_ibo = 30 pF - making it suitable for audio preamplifier stages and RF front-end bias networks where capacitance and noise impact signal integrity.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29–04, Style 1), plastic through-hole package with 2.54 mm lead pitch, compatible with standard radial tape-in-fan-fold (Style M) or reel packaging (RLRM suffix).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar PNP small-signal transistor applications.

Compared with MPS2907RLRM, MMBT2907A offers higher voltage rating and tighter h_FE spec for demanding analog stages, while PN2907A provides identical specs in legacy TO-92 form - neither is pin-compatible with SMT variants, and all three require explicit base current design due to BJT control nature.

Availability

MPS2907RLRM is available at Aetrix Electronics and suitable for audio signal conditioning, digital I/O buffering, and power supply sequencing requiring stable component supply, long-term obsolescence management, and full traceability from manufacturing lot to delivery.

Supply support for MPS2907RLRM 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 supplier specializing in energy-efficient power management, analog, sensors, and connectivity solutions for automotive, industrial, and consumer markets.

The MPS2907RLRM belongs to ON Semiconductor's legacy small-signal transistor family, designed for general-purpose amplification and switching in cost-sensitive, high-reliability through-hole applications where proven performance and long-lifecycle support are essential.

FAQ

What is the maximum collector-emitter voltage rating for the MPS2907RLRM?

The MPS2907RLRM has a maximum collector-emitter voltage rating (V_CEO) of –40 Vdc at T_A = 25°C. This rating applies under open-base conditions and defines the upper limit for reverse-biased operation in common-emitter configurations. Exceeding this value risks avalanche breakdown and permanent device failure. Derating is not specified beyond temperature effects on leakage, so design margins should be applied for reliability.

Does the MPS2907RLRM have a specified noise figure, and under what conditions?

Yes, the MPS2907RLRM has a documented noise figure (NF) ranging from approximately 2 dB to 8 dB, measured at 1 kHz with V_CE = 10 Vdc and T_A = 25°C. The exact value depends on collector current (e.g., NF ≈ 2 dB at I_C = –1 mA with optimal source resistance) and is detailed in Figure 7 of the Motorola datasheet. This makes the MPS2907RLRM suitable for low-noise preamplifier stages where signal integrity is critical.

What is the thermal resistance from junction to ambient (R_JA) for the MPS2907RLRM in its TO-92 package?

The thermal resistance from junction to ambient (R_JA) for the MPS2907RLRM in its standard TO-92 package is 200 °C/W, as specified in the Thermal Characteristics table. This value assumes free-air convection and no PCB copper pour; actual R_JA improves significantly with thermal vias and copper area. For example, adding 1 in² of 2-oz copper on both sides can reduce R_JA to ~120 °C/W, enabling higher sustained power dissipation.

How does the DC current gain (h_FE) of the MPS2907RLRM vary with collector current?

The DC current gain (h_FE) of the MPS2907RLRM varies with collector current: it is 35–75 at I_C = –0.1 mA, 50–100 at I_C = –1.0 mA, 75–100 at I_C = –10 mA, and drops to 30–50 at I_C = –500 mA. This behavior is shown in Figure 3 of the datasheet and reflects typical BJT gain compression at extremes. Designers must select bias points within the 1–100 mA range for predictable, stable gain in linear applications.

Is the MPS2907RLRM suitable for switching applications, and what are its key timing parameters?

Yes, the MPS2907RLRM is well-suited for switching applications, with documented turn-on time (t_on) ≤ 45 ns, delay time (t_d) ≤ 10 ns, rise time (t_r) ≤ 40 ns, turn-off time (t_off) ≤ 100 ns, storage time (t_s) ≤ 80 ns, and fall time (t_f) ≤ 30 ns. These values were measured under standardized conditions (V_CC = –30 V, I_C = –150 mA, I_B1 = –15 mA), confirming suitability for PWM and digital logic interfacing up to ~3 MHz with appropriate base drive design.