onsemi MPS8099RLRA

Overview

MPS8099RLRA from onsemi is an NPN general-purpose amplifier transistor in TO-92 package, rated for 80 V_CEO, 500 mA continuous collector current, and 625 mW power dissipation at T_A = 25°C. It delivers h_FE ≥ 100 at I_C = 1.0 mA and supports f_T = 150 MHz, making it suitable for low-to-medium frequency amplification and switching in consumer audio preamps and signal conditioning stages.

For engineers reviewing the MPS8099RLRA datasheet, pinout, applications, or equivalent options, key selection criteria include its V_CEO/I_C rating margin, DC current gain stability across 1–100 mA, saturation voltage under 0.4 V at I_C/I_B = 10, and thermal resistance (R_JA = 200°C/W) for ambient-limited PCB layouts.

Technical Context

The MPS8099RLRA operates as a silicon NPN bipolar junction transistor optimized for linear amplification and moderate-speed switching. Its design emphasizes stable h_FE over temperature (−55°C to +150°C), low C_ibo (≤30 pF) and C_obo (≤8.0 pF), and robust safe operating area (SOA) up to 40 V and 200 mA in active region with ≤10% duty cycle.

It features V_BE(on) = 0.6–0.8 V at I_C = 10 mA, V_CE(sat) ≤ 0.4 V at I_C = 100 mA/I_B = 5 mA, and breakdown voltages of 80 V for both V_(BR)CEO and V_(BR)CBO, enabling reliable operation in 24–48 V rail applications with margin.

Key Specifications

Pinout & Package

Package: TO-92 (Case 29-11), straight-lead, Pb-free, tape-and-reel (2000 units). Dimensions per onsemi spec: A = 4.45–5.20 mm, B = 4.32–5.33 mm, C = 3.18–4.19 mm, lead pitch = 2.54 mm.

Key Features

Applications

Equivalent & Alternatives

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

Compared with BC547B and MPSA18, the MPS8099RLRA offers superior voltage headroom (80 V vs. 45 V) while maintaining competitive gain-bandwidth and thermal performance in TO-92, making it the preferred choice for 48 V-compatible analog and switching functions where reliability under transient overvoltage is critical.

Availability

MPS8099RLRA is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics, and consumer audio equipment requiring stable component supply and Pb-free compliance.

Supply support for MPS8099RLRA 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 focused on energy-efficient innovation for automotive, industrial, cloud, and IoT applications.

The MPS8099RLRA belongs to onsemi's legacy general-purpose bipolar transistor product line, designed for cost-sensitive, high-reliability linear amplification and medium-speed switching in space-constrained through-hole applications.

FAQ

What is the maximum continuous collector current rating for MPS8099RLRA?

The MPS8099RLRA has a maximum continuous collector current (I_C) rating of 500 mA at T_A = 25°C. Derating is required above 25°C at 5.0 mW/°C. This rating allows the MPS8099RLRA to drive small relays, LED arrays, or pre-driver loads without forced cooling in typical ambient conditions.

Does MPS8099RLRA support Pb-free assembly processes?

Yes, the MPS8099RLRA is offered in a Pb-free TO-92 package compliant with RoHS Directive 2011/65/EU. The "G" suffix denotes Pb-free variants, and MPS8099RLRA itself is Pb-free per onsemi's packaging specification and soldering guidelines in SOLDERRM/D.

What is the typical current gain (h_FE) of MPS8099RLRA at 100 mA collector current?

At I_C = 100 mA, V_CE = 5.0 V, and T_A = 25°C, the MPS8099RLRA exhibits h_FE ≥ 75 (minimum) with typical values reaching 150–200. This ensures usable gain in medium-current amplifier and switch applications where linearity and saturation behavior must be maintained.

Can MPS8099RLRA be used in switching applications above 1 MHz?

The MPS8099RLRA has an f_T of 150 MHz, but its practical switching speed is limited by storage time and capacitance. Measured turn-off time (t_f) is ~70 ns at I_C/I_B = 10, supporting reliable operation up to ~5 MHz in optimized PCB layouts. For >10 MHz switching, consider RF-optimized transistors like MMBT2222A instead of MPS8099RLRA.

What is the thermal resistance junction-to-ambient (R_JA) for MPS8099RLRA in standard mounting?

The MPS8099RLRA has R_JA = 200°C/W when mounted on a standard FR-4 PCB with minimal copper (per JEDEC test board). With 1 in² of 2-oz copper pour, R_JA improves to ~120°C/W. This value directly determines allowable power dissipation: at 50°C ambient, max P_D = (150°C − 50°C)/200°C/W = 500 mW before exceeding T_J(max).