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Motorola M9583 NPN Silicon BJT Stud-Mount Power Transistor Matched Pair – Bench Tested

RF Transistors and Finals • SKU RF-M9583-STUD-NPN-PAIR-001

$49.99

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Vintage Motorola M9583 NPN silicon BJT stud-mount transistor matched pair, bench tested and verified by RF Boneyard™. These rugged Motorola devices use a threaded stud-style heatsink mount and appear suited for legacy RF, industrial, power supply, transmitter, and vintage communications equipment repairs.

Both devices tested extremely close, with matching hFE of 22 and very similar Vbe and Vce saturation readings. The attached metal stud/mounting hardware appears to be part of the original heatsink or mounting assembly and is included as shown. Buyer must verify pinout, mounting, and compatibility for their specific equipment.

Part numberM9583
ManufacturerMotorola
ConditionTested vintage pulls
Quantity1
Obsolete Stock Origin Tracker Obsolete Stock

Legacy or discontinued stock no longer in normal production flow. Future supply may be limited.

⚡ Boneyard Pipeline
In Stock1 available
StatusGone When Gone

Pipeline quantities are informational and may change after arrival, inspection, sorting, testing, or donor teardown.

Compatible Radios / Boards

12V RF amplifier stages
VHF / 175MHz-class RF circuits
Legacy Motorola RF equipment
Ham radio repair
CB / commercial radio repair
Vintage transmitter driver/final stages
RF power amplifier restoration

RF Boneyard Bench Notes

Transistor 1

Type: NPN Silicon BJT
Tester Leads: Red-B, Green-E, Blue-C
hFE: 22 at Ic=4.99mA
Vbe: 0.631V at Ib=1.00mA
Vbe: 0.678V at Ib=5.00mA
VceSat: 0.037V at Ic=5.0mA and Ib=1.00mA
IcLeak: 0.016mA
Bench Result: PASS

Transistor 2

Type: NPN Silicon BJT
Tester Leads: Red-B, Green-E, Blue-C
hFE: 22 at Ic=5.01mA
Vbe: 0.627V at Ib=1.00mA
Vbe: 0.676V at Ib=5.00mA
VceSat: 0.035V at Ic=5.0mA and Ib=1.00mA
IcLeak: 0.000mA
Bench Result: PASS

Pair Match Notes

hFE Match: Excellent
Vbe Match: Excellent
VceSat Match: Excellent
Leakage: Low / excellent
Overall Match: Bench-verified matched pai

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See Listing Tech Install OLD / Useful Repair Stock
RF Boneyard Passport
☠
#
Part Number:
M9583
🏭
Manufacturer:
Motorola
▦
Category:
RF Boneyard Part
🔧
Condition:
Donar Vinatge Pull
⌁
Bench Status:
Bench Tested Pass
📄
Docs:
See Listing
⚠
Install Level:
Technician Install
◆
Rarity:
OLD / Useful Repair Stock
Passport Key
Condition = source/physical state. Bench Status = what kind of bench check or note exists. Docs = datasheet or support file attached. Install Level = caution level for fitting the part. Rarity = how hard it may be to replace.
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