component
MMBTH10
Public Made by Adomby adom
UMW NPN VHF/UHF transistor, SOT-23. Datasheet-cited specs, KiCad, Fusion and Altium libraries and a 3D model.
3D Model
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Symbol & Footprint
Schematic Symbol
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PCB Footprint
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Datasheet
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README
markdownMMBTH10
UMW (Youtai Semiconductor) · NPN RF transistor · SOT-23
UMW MMBTH10 NPN transistor in SOT-23 for VHF and UHF amplifiers, mixers and oscillators: 650 MHz transition frequency, 25 V, 50 mA. Marking 3EM.
Verification
A person checks each page against its datasheet and signs it off here; the badge turns amber if a checked file changes.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | B | input | Base (datasheet p.1). |
| 2 | E | passive | Emitter. |
| 3 | C | passive | Collector. |
Key specifications
| Parameter | Value | Source |
|---|---|---|
| Collector-emitter voltage | 25 V | Datasheet p.1 |
| Collector-base voltage | 30 V | Datasheet p.1 |
| Emitter-base voltage | 3 V | Datasheet p.1 |
| Collector current | 50 mA | Datasheet p.1 |
| Power dissipation | 225 mW | Datasheet p.1 |
| DC current gain | 60 min at VCE = 10 V, IC = 4 mA | Datasheet p.1 |
| Transition frequency | 650 MHz | Datasheet p.1 |
| Collector output capacitance | 0.7 pF max | Datasheet p.1 |
| Marking | 3EM | Datasheet p.1 |
Ordering
| Distributor | Part number | Note |
|---|---|---|
| LCSC / JLCPCB | C545531 | JLC Extended part, 8,358 in stock on 2026-10-08 |
| Mouser | not listed | no listing for this manufacturer's part (searched 2026-10-08; the same number from onsemi was not counted) |
| DigiKey | not listed | no listing for this manufacturer's part (searched 2026-10-08; the same number from onsemi was not counted) |
CAD
| File | What it is |
|---|---|
mmbth10.kicad_sym |
KiCad symbol, with MPN, manufacturer and distributor numbers as properties |
mmbth10.kicad_mod |
KiCad footprint: Package_TO_SOT_SMD:SOT-23, KiCad official, CC-BY-SA 4.0 |
mmbth10.step / mmbth10.glb |
3D model, Z-up, seated on z = 0: KiCad packages3D (tag 10.0.6), SOT-23.step |
mmbth10-etched.step / mmbth10-etched.glb |
The same model with the part number laser-etched on top as a separate, toggleable Adom.LaserEtch group (a virtual identification aid, not the maker's real marking) |
mmbth10.lbr |
Fusion 360 / EAGLE library: one deviceset, each with its own MPN, manufacturer and LCSC / Mouser / DigiKey attributes |
altium/Adom_mmbth10.SchLib / .PcbLib |
Altium library pair (adom-lbr, no Altium needed): symbol and footprint with the 3D body, parameters carry the part numbers; altium/*.adom-lbr.json is the canonical hub each was built from |
Provenance
- Datasheet: docs/mmbth10-datasheet.pdf, sha256
2a9450e4a971155a, retrieved 2026-10-08 from LCSC - Specs: each row names its source: the manufacturer datasheet (with page) or the LCSC parametric listing (retrieved 2026-10-08).
- Distributor numbers: looked up 2026-10-08 with adom-parts-search (Mouser, DigiKey, JLCPCB), exact part number and manufacturer only.
- CAD: footprint
Package_TO_SOT_SMD:SOT-23; 3D: KiCad packages3D (tag 10.0.6), SOT-23.step.
Related
- Used on the AM/FM Receiver Molecule.