Motorola MPSA34 PNP Darlington Transistor TO-92 Vintage USA Semiconductor
$9.99
Genuine vintage Motorola MPSA34 PNP Darlington transistor in TO-92 package. The MPSA34 is a high-gain Darlington device designed for switching, driver, control, relay, sensor, alarm, industrial, and low-current power applications. Its Darlington configuration provides substantially higher current gain than standard bipolar transistors, making it ideal for circuits requiring very small drive currents.
Manufactured during Motorola's golden era of semiconductor production, the MPSA34 remains a popular component for restoration, repair, experimentation, and replacement applications involving legacy electronics. Add this to the description:
Features genuine gold-plated leads, a desirable characteristic found on many vintage Motorola semiconductors. Gold-plated lead construction helps resist oxidation and provides excellent long-term solderability for restoration and repair applications.
Origin Tracker
Obsolete Stock
Legacy or discontinued stock no longer in normal production flow. Future supply may be limited.
Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.
Compatible Radios / Boards
Industrial Control Boards
Alarm Systems
Consumer Electronics
Test Equipment
Sensor Circuits
Control Panels
Legacy Motorola Designs
OEM Electronics Assembli
RF Boneyard Bench Notes
Measured Parameters
hFE: 51
IC: 4.96 mA
VBE @ IB = 1.00 mA: 0.747 V
VBE @ IB = 5.00 mA: 1.210 V
VCE(sat): 0.600 V
Saturation Test Current (IC): 5.00 mA
Saturation Base Current (IB): 1.00 mA
ICE Leakage: 0.000 mA
Bench Assessment
Bench verified Darlington silicon power BJT. Measured hFE 51 at IC 4.96 mA, VBE 0.747 V at IB 1.00 mA, VBE 1.210 V at IB 5.00 mA, VCE(sat) 0.600 V at IC 5.00 mA / IB 1.00 mA, and ICE leakage 0.000 mA. Elevated VBE and higher saturation voltage are consistent with Darlington transistor construction. Device exhibited normal Darlington junction behavior with no measurable collector-emitter leakage during testing.
Ask the bench before you buy.
Post a question about this part
Login or create an account to ask a product question. This helps keep spam out of the RF Boneyard bench.
Login to AskAnswered Questions
No answered questions yet. Be the first to ask the bench.