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FRM252WJR500TK
Public Made by Adomby adom
FOJAN Current Sense Resistors / Shunt Resistors, 2512. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.
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FRM252WJR500TK
FOJAN · Current Sense Resistors / Shunt Resistors · 2512
FRM252WJR500TK from FOJAN, in a 2512. 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 | 1 | passive | First end electrode (Cu/Ni/Sn plated) of the 2512 alloy resistor, 6.4×3.2 mm body, recommended pad a=4.0 mm, b=2.1 mm for 1-680 mΩ; rated 2 W at 70°C and 63 A rated current. |
| 2 | 2 | passive | Second end electrode (Cu/Ni/Sn plated) of the 2512 alloy resistor, interchangeable with the first; resistance is measured Kelvin four-terminal at points on the product bottom (A=5.6 mm, B=2.0 mm). |
Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FOJAN |
| Package | 2512 |
| Category | Resistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance (part-number letter J) | -5 | 5 | % | Tolerance code J = ±5% per part-numbering table | 2 | ||
| Temperature coefficient of resistance | TCR | -50 | 50 | PPM/°C | Measured at 25°C and +125°C, reference point +25°C | 5 | |
| Power rating at P70 | P70 | 2 | W | Power rating at P70 (2512 type, 2 W) | 5 | ||
| Rated current | 63 | A | 5 | ||||
| Max overload current | 141 | A | 5 | ||||
| Operating temperature range | T | -55 | 170 | °C | 5 | ||
| Nominal resistance (part-number code R500) | R | 500 | mΩ | Code R500 = 500 mΩ; Kelvin four-terminal measurement | 2 | ||
| Resistance range (2512 standard type) | 1 | 680 | mΩ | 2512 standard type (2512-L is a separate sibling range 0.5~4 mΩ) | 5 | ||
| Dielectric withstanding voltage | 500 | V DC | 2 | ||||
| Resistance change, high temperature exposure (storage) | ΔR | -1 | 1 | % | 170°C, 1000 h; measured 24 h after test | 6 | |
| Resistance change, low temperature exposure (storage) | ΔR | -0.5 | 0.5 | % | -55°C, 1000 h; measured 24 h after test | 6 | |
| Resistance change, temperature cycling | ΔR | -0.5 | 0.5 | % | -55°C to 125°C, 1000 cycles; measured 24 h after test | 6 | |
| Resistance change, short time overload | ΔR | -0.5 | 0.5 | % | 5 × rated power for 5 s | 6 | |
| Resistance change, moisture resistance | ΔR | -1 | 1 | % | 24 h per cycle, 10 cycles; steps 7a and 7b not required | 6 | |
| Resistance change, biased humidity | ΔR | -0.5 | 0.5 | % | 10% rated power, 85°C, RH 85%, 1000 h; measured 24 h after test | 6 | |
| Resistance change, load life | ΔR | -1 | 1 | % | 1000 h at +70°C, 1.5 h ON / 0.5 h OFF; measured 24 h after test | 7 | |
| Resistance change, resistance to soldering heat | ΔR | -0.5 | 0.5 | % | 260±5°C solder, 10±1 s dwell | 7 | |
| Resistance change, mechanical shock | ΔR | -0.5 | 0.5 | % | 100 g's, 6 ms half sine, 3 times in each of 6 directions | 7 | |
| Resistance change, vibration | ΔR | -0.5 | 0.5 | % | 5 g's, 10-2000 Hz, 20 min per cycle, 12 cycles in X, Y, Z | 7 | |
| Resistance change, board flex | ΔR | -0.5 | 0.5 | % | Min 2 mm deflection, 60 s | 7 | |
| Resistance change, thermal shock | ΔR | -1 | 1 | % | -55°C/+155°C, 1000 cycles, max transfer 20 s, dwell 15 min | 7 | |
| Resistance change, ESD | ΔR | -1 | 1 | % | Direct contact ±6 kV; air discharge +12 kV, +16 kV, +25 kV | 7 |
CAD (KiCad official)
- Symbol:
FRM252WJR500TK - Footprint:
Resistor_SMD:R_2512_6332Metric - 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files:
frm252wjr500tk-etched.step/frm252wjr500tk-etched.glbcarry the MPN laser-etched on the die in a toggleableAdom.LaserEtchgroup (Fusion-ready);frm252wjr500tk.step/frm252wjr500tk.glbare the bare package body.
Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- Datasheet: FOJAN datasheet (12 pp, sha256
13a1c74e6b23cc10, retrieved 2026-10-19, tier: lcsc) - Datasheet language: Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- Extractor: parts-factory
2.0.0/extract_pins 0.3, primaryclaude-sonnet-5-5(text+vision), consensusclaude-opus-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).
# FRM252WJR500TK
**FOJAN** · Current Sense Resistors / Shunt Resistors · 2512
FRM252WJR500TK from FOJAN, in a 2512. 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 | 1 | passive | First end electrode (Cu/Ni/Sn plated) of the 2512 alloy resistor, 6.4×3.2 mm body, recommended pad a=4.0 mm, b=2.1 mm for 1-680 mΩ; rated 2 W at 70°C and 63 A rated current. |
| 2 | 2 | passive | Second end electrode (Cu/Ni/Sn plated) of the 2512 alloy resistor, interchangeable with the first; resistance is measured Kelvin four-terminal at points on the product bottom (A=5.6 mm, B=2.0 mm). |
## Key specifications
| Parameter | Value |
|---|---|
| Manufacturer | FOJAN |
| Package | 2512 |
| Category | Resistors |
| 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 |
|---|---|---|---|---|---|---|---|
| Tolerance (part-number letter J) | | -5 | | 5 | % | Tolerance code J = ±5% per part-numbering table | 2 |
| Temperature coefficient of resistance | TCR | -50 | | 50 | PPM/°C | Measured at 25°C and +125°C, reference point +25°C | 5 |
| Power rating at P70 | P70 | | | 2 | W | Power rating at P70 (2512 type, 2 W) | 5 |
| Rated current | | | | 63 | A | | 5 |
| Max overload current | | | | 141 | A | | 5 |
| Operating temperature range | T | -55 | | 170 | °C | | 5 |
| Nominal resistance (part-number code R500) | R | | 500 | | mΩ | Code R500 = 500 mΩ; Kelvin four-terminal measurement | 2 |
| Resistance range (2512 standard type) | | 1 | | 680 | mΩ | 2512 standard type (2512-L is a separate sibling range 0.5~4 mΩ) | 5 |
| Dielectric withstanding voltage | | | | 500 | V DC | | 2 |
| Resistance change, high temperature exposure (storage) | ΔR | -1 | | 1 | % | 170°C, 1000 h; measured 24 h after test | 6 |
| Resistance change, low temperature exposure (storage) | ΔR | -0.5 | | 0.5 | % | -55°C, 1000 h; measured 24 h after test | 6 |
| Resistance change, temperature cycling | ΔR | -0.5 | | 0.5 | % | -55°C to 125°C, 1000 cycles; measured 24 h after test | 6 |
| Resistance change, short time overload | ΔR | -0.5 | | 0.5 | % | 5 × rated power for 5 s | 6 |
| Resistance change, moisture resistance | ΔR | -1 | | 1 | % | 24 h per cycle, 10 cycles; steps 7a and 7b not required | 6 |
| Resistance change, biased humidity | ΔR | -0.5 | | 0.5 | % | 10% rated power, 85°C, RH 85%, 1000 h; measured 24 h after test | 6 |
| Resistance change, load life | ΔR | -1 | | 1 | % | 1000 h at +70°C, 1.5 h ON / 0.5 h OFF; measured 24 h after test | 7 |
| Resistance change, resistance to soldering heat | ΔR | -0.5 | | 0.5 | % | 260±5°C solder, 10±1 s dwell | 7 |
| Resistance change, mechanical shock | ΔR | -0.5 | | 0.5 | % | 100 g's, 6 ms half sine, 3 times in each of 6 directions | 7 |
| Resistance change, vibration | ΔR | -0.5 | | 0.5 | % | 5 g's, 10-2000 Hz, 20 min per cycle, 12 cycles in X, Y, Z | 7 |
| Resistance change, board flex | ΔR | -0.5 | | 0.5 | % | Min 2 mm deflection, 60 s | 7 |
| Resistance change, thermal shock | ΔR | -1 | | 1 | % | -55°C/+155°C, 1000 cycles, max transfer 20 s, dwell 15 min | 7 |
| Resistance change, ESD | ΔR | -1 | | 1 | % | Direct contact ±6 kV; air discharge +12 kV, +16 kV, +25 kV | 7 |
## CAD (KiCad official)
- Symbol: `FRM252WJR500TK`
- Footprint: `Resistor_SMD:R_2512_6332Metric`
- 3D model: 2512 (KiCad packages3D, STEP)
- 3D model files: `frm252wjr500tk-etched.step` / `frm252wjr500tk-etched.glb` carry the MPN laser-etched on the die in a toggleable `Adom.LaserEtch` group (Fusion-ready); `frm252wjr500tk.step` / `frm252wjr500tk.glb` are the bare package body.
## Provenance
Data extracted from the manufacturer datasheet, not a distributor listing:
- **Datasheet:** [FOJAN datasheet](https://jlcpcb.com/api/file/downloadByFileSystemAccessId/8763505009256476672) (12 pp, sha256 `13a1c74e6b23cc10`, retrieved 2026-10-19, tier: lcsc)
- **Datasheet language:** Chinese. Pin names, descriptions, and specs on this page were extracted and translated to English by ds2sf; the linked PDF is the manufacturer original.
- **Extractor:** parts-factory `2.0.0` / `extract_pins 0.3`, primary `claude-sonnet-5-5` (text+vision), consensus `claude-opus-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/frm252wjr500tk-datasheet.pdf)