component
RL257 TB
Public Made by Adomby adom
YFW Diodes - General Purpose, DO-15. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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RL257 TB
YFW · Diodes - General Purpose · DO-15
RL257 TB from YFW, in a DO-15. 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 with a cathode band on the DO-15 body; positive terminal of the rectifier, with VRRM of 1000 V for RL257. |
| 2 | A | passive | Anode terminal of the rectifier at the end opposite the cathode mark, with 2.5 A maximum average forward current at Tc = 100 °C. |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | DO-15 |
| 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 | 1000 | V | RL257 | 1 | ||
| Maximum RMS voltage | VRMS | 700 | V | RL257 | 1 | ||
| Maximum DC Blocking Voltage | VDC | 1000 | V | RL257 | 1 | ||
| Maximum Average Forward Rectified Current | IF(AV) | 2.5 | A | Tc = 100 °C | 1 | ||
| Peak Forward Surge Current | IFSM | 100 | A | 8.3 ms Single Half Sine Wave Superimposed on Rated Load | 1 | ||
| Maximum Instantaneous Forward Voltage | VF | 1.1 | V | at 1.0A | 1 | ||
| Maximum DC Reverse Current | IR | 10 | μA | Ta = 25 °C, at Rated DC Blocking Voltage | 1 | ||
| Maximum DC Reverse Current | IR | 500 | μA | Ta = 125 °C, at Rated DC Blocking Voltage | 1 | ||
| Operating and Storage Temperature Range | Tj, Tstg | -55 | 150 | °C | 1 | ||
| Typical Junction Capacitance | Cj | 55 | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 | ||
| Typical Thermal Resistance | RθJA | 75 | °C/W | 1 |
CAD (KiCad official)
- Symbol:
RL257 TB - Footprint:
Diode_THT:D_DO-15_P12.70mm_Horizontal - 3D model: DO-15 (KiCad packages3D, STEP)
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: YFW datasheet (3 pp, sha256
b1cc50d74b8e9c45, 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).
# RL257 TB
**YFW** · Diodes - General Purpose · DO-15
RL257 TB from YFW, in a DO-15. 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 with a cathode band on the DO-15 body; positive terminal of the rectifier, with VRRM of 1000 V for RL257. |
| 2 | A | passive | Anode terminal of the rectifier at the end opposite the cathode mark, with 2.5 A maximum average forward current at Tc = 100 °C. |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | YFW |
| Package | DO-15 |
| 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 | | | 1000 | V | RL257 | 1 |
| Maximum RMS voltage | VRMS | | | 700 | V | RL257 | 1 |
| Maximum DC Blocking Voltage | VDC | | | 1000 | V | RL257 | 1 |
| Maximum Average Forward Rectified Current | IF(AV) | | | 2.5 | A | Tc = 100 °C | 1 |
| Peak Forward Surge Current | IFSM | | | 100 | A | 8.3 ms Single Half Sine Wave Superimposed on Rated Load | 1 |
| Maximum Instantaneous Forward Voltage | VF | | | 1.1 | V | at 1.0A | 1 |
| Maximum DC Reverse Current | IR | | | 10 | μA | Ta = 25 °C, at Rated DC Blocking Voltage | 1 |
| Maximum DC Reverse Current | IR | | | 500 | μA | Ta = 125 °C, at Rated DC Blocking Voltage | 1 |
| Operating and Storage Temperature Range | Tj, Tstg | -55 | | 150 | °C | | 1 |
| Typical Junction Capacitance | Cj | | 55 | | pF | Measured at 1 MHz and applied reverse voltage of 4 V D.C | 1 |
| Typical Thermal Resistance | RθJA | | 75 | | °C/W | | 1 |
## CAD (KiCad official)
- Symbol: `RL257 TB`
- Footprint: `Diode_THT:D_DO-15_P12.70mm_Horizontal`
- 3D model: DO-15 (KiCad packages3D, STEP)
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [YFW datasheet](docs/rl257-tb-datasheet.pdf) (3 pp, sha256 `b1cc50d74b8e9c45`, 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/rl257-tb-datasheet.pdf)