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Contents

README

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RL1206A120K

RUILON Shenzhen Ruilongyuan Elec · Varistors · 1206

RL1206A120K from RUILON Shenzhen Ruilongyuan Elec, in a 1206. 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 One terminal of the bidirectional, symmetrical varistor (WB 0.50±0.20 mm end termination); RL1206A120K has varistor voltage 9.6~14.4 V at 1mA, max 5 Vac / 8 Vdc.
2 2 passive Other terminal of the bidirectional, symmetrical varistor (interchangeable with the first terminal); max clamping voltage 30 V at 5 A (8/20μs).

Key specifications

Parameter Value
Manufacturer RUILON Shenzhen Ruilongyuan Elec
Package 1206
Category Circuit Protection
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
Varistor voltage V1mA 9.6 14.4 V 2
Varistor voltage tolerance (K) -10 10 % Standard tolerance K: ±10% 1
Max. allowable voltage (AC) VAC 5 V 2
Max. allowable voltage (DC) VDC 8 V 2
Max. energy 0.4 J 10/1000μs 2
Max. clamping voltage VC 30 V 8/20μs, IP = 5 A 2
Max. peak pulse current IP 5 A 8/20μs 2
Withstanding surge current I 120 A 8/20μs 2
Varistor voltage change, bias humidity VV/VV -10 10 % 90%RH, 40ºC, working voltage, 1000 hrs 3
Varistor voltage change, thermal shock VV/VV -10 10 % -40ºC to 85ºC, 30 min cycle, 5 cycles 3
Varistor voltage change, full load VV/VV -10 10 % Working voltage, 85ºC, 1000 hrs 3
Operating temperature range -55 125 ℃ 1
Storage temperature range 5 40 ℃ Storage condition; relative humidity to 65%, storage time 12 months max 3
Response time 1 ns 1
Peak reflow temperature (Pb-free) TP 260 °C Pb-free reflow, +0/-5°C, 20-40 s within 5°C of peak 3

CAD (KiCad official)

  • Symbol: RL1206A120K
  • Footprint: Resistor_SMD:R_1206_3216Metric
  • 3D model: 1206 (KiCad packages3D, STEP)
  • 3D model files: rl1206a120k-etched.step / rl1206a120k-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); rl1206a120k.step / rl1206a120k.glb are the bare package body.

Provenance

Data extracted from the manufacturer datasheet, not a distributor listing:

  • Datasheet: RUILON Shenzhen Ruilongyuan Elec datasheet (4 pp, sha256 7cadef546238b404, retrieved 2026-10-17, tier: lcsc)
  • 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