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US3DB
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LangJie Fast Recovery / High Efficiency Diodes, DO-214AA. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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US3DB
LangJie · Fast Recovery / High Efficiency Diodes · DO-214AA
US3DB from LangJie, in a DO-214AA. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode, marked by the laser band on the DO-214AA body; the 200 V US3DB blocks reverse voltage up to VRRM/VDC 200 V at this terminal. |
| 2 | A | passive | Anode terminal, opposite the laser band; carries up to 3.0 A average forward current (IF(AV) at TA=100℃) for the US3DB. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LangJie |
| Package | DO-214AA |
| Category | Diodes |
| Pins | 2 |
Electrical characteristics
Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM | 200 | Volts | 1 | |||
| Maximum RMS Voltage | VRMS | 140 | Volts | 1 | |||
| Maximum DC Blocking Voltage | VDC | 200 | Volts | 1 | |||
| Maximum Average Forward Rectified Current | I(AV) | 3 | Amps | TA=100℃ | 1 | ||
| Peak Forward Surge Current | IFSM | 80 | Amps | 8.3ms single half sine wave superimposed on rated load (JEDEC Method) | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 1 | Volts | at 3.0A | 1 | ||
| Maximum DC Reverse Current | IR | 5 | µA | TA = 25℃, rated DC blocking voltage | 1 | ||
| Maximum DC Reverse Current | IR | 100 | µA | TA = 125℃, rated DC blocking voltage | 1 | ||
| Maximum Reverse Recovery Time | TRR | 50 | nS | If=0.5A, Ir=1.0A, Irr=0.25A | 1 | ||
| Operating Junction Temperature | TJ | -55 | 150 | ℃ | 1 | ||
| Storage Temperature Range | TSTG | -55 | 150 | ℃ | 1 | ||
| Typical Junction Capacitance | CJ | 50 | pF | Measured at 1.0MHz and applied reverse voltage of 4.0V | 1 | ||
| Typical Thermal Resistance, junction to ambient | RθJA | 70 | ℃/W | Unit mounted on P.C.B. with 0.3×0.3″(8.0 × 8.0mm) copper pads | 1 | ||
| Typical Thermal Resistance, junction to lead | RθJL | 28 | ℃/W | Unit mounted on P.C.B. with 0.3×0.3″(8.0 × 8.0mm) copper pads | 1 |
CAD (KiCad official)
- Symbol:
US3DB - Footprint:
Diode_SMD:D_SMB - 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files:
us3db-etched.step/us3db-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);us3db.step/us3db.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: LangJie datasheet (6 pp, sha256
791e2454b0f6cc4c, retrieved 2026-10-22, tier: lcsc) - Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text), consensusclaude-sonnet-5-5(agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish. - CAD: KiCad official libraries (CC-BY-SA 4.0).
# US3DB
**LangJie** · Fast Recovery / High Efficiency Diodes · DO-214AA
US3DB from LangJie, in a DO-214AA. Pinout and pin descriptions extracted from the manufacturer datasheet (extract_pins, cross-checked by a second model); symbol, footprint, and 3D from KiCad-official CAD.
## Pinout
| Pin | Name | Type | Function |
|---|---|---|---|
| 1 | K | passive | Cathode, marked by the laser band on the DO-214AA body; the 200 V US3DB blocks reverse voltage up to VRRM/VDC 200 V at this terminal. |
| 2 | A | passive | Anode terminal, opposite the laser band; carries up to 3.0 A average forward current (IF(AV) at TA=100℃) for the US3DB. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | LangJie |
| Package | DO-214AA |
| Category | Diodes |
| Pins | 2 |
## Electrical characteristics
Limits as printed in the datasheet (page.json `metadata.characteristics` carries them as data).
| Parameter | Symbol | Min | Typ | Max | Unit | Conditions | Page |
|---|---|---|---|---|---|---|---|
| Maximum Repetitive Peak Reverse Voltage | VRRM | | | 200 | Volts | | 1 |
| Maximum RMS Voltage | VRMS | | | 140 | Volts | | 1 |
| Maximum DC Blocking Voltage | VDC | | | 200 | Volts | | 1 |
| Maximum Average Forward Rectified Current | I(AV) | | | 3 | Amps | TA=100℃ | 1 |
| Peak Forward Surge Current | IFSM | | | 80 | Amps | 8.3ms single half sine wave superimposed on rated load (JEDEC Method) | 1 |
| Maximum Instantaneous Forward Voltage | VF | | | 1 | Volts | at 3.0A | 1 |
| Maximum DC Reverse Current | IR | | | 5 | µA | TA = 25℃, rated DC blocking voltage | 1 |
| Maximum DC Reverse Current | IR | | | 100 | µA | TA = 125℃, rated DC blocking voltage | 1 |
| Maximum Reverse Recovery Time | TRR | | | 50 | nS | If=0.5A, Ir=1.0A, Irr=0.25A | 1 |
| Operating Junction Temperature | TJ | -55 | | 150 | ℃ | | 1 |
| Storage Temperature Range | TSTG | -55 | | 150 | ℃ | | 1 |
| Typical Junction Capacitance | CJ | | 50 | | pF | Measured at 1.0MHz and applied reverse voltage of 4.0V | 1 |
| Typical Thermal Resistance, junction to ambient | RθJA | | 70 | | ℃/W | Unit mounted on P.C.B. with 0.3×0.3″(8.0 × 8.0mm) copper pads | 1 |
| Typical Thermal Resistance, junction to lead | RθJL | | 28 | | ℃/W | Unit mounted on P.C.B. with 0.3×0.3″(8.0 × 8.0mm) copper pads | 1 |
## CAD (KiCad official)
- Symbol: `US3DB`
- Footprint: `Diode_SMD:D_SMB`
- 3D model: DO-214AA (KiCad packages3D, STEP)
- 3D model files: `us3db-etched.step` / `us3db-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `us3db.step` / `us3db.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [LangJie datasheet](docs/us3db-datasheet.pdf) (6 pp, sha256 `791e2454b0f6cc4c`, retrieved 2026-10-22, tier: lcsc)
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text), consensus `claude-sonnet-5-5` (agreed), guards: pin_guards 0.1: passed. Pins are checked against the footprint pad set and their cited datasheet pages before publish.
- **CAD:** KiCad official libraries (CC-BY-SA 4.0).
[Datasheet PDF](docs/us3db-datasheet.pdf)