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SS451A

Public Made by Adom

by adom

Honeywell Hall Switches, TO-92S. Pinout cross-checked by two models against the datasheet, KiCad symbol/footprint/3D.

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SS451A

Honeywell · Hall Switches · TO-92S

SS451A from Honeywell, in a TO-92S. 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 VS power_in Supply voltage pin, operating range 3 V to 24 V DC (absolute maximum -28 V to 28 V), with 3.5 to 6 mA typical supply current.
2 GND power_in Ground (-) reference pin for the supply and the sinking output.
3 OUT output Current-sinking digital output that goes low (Vsat max 0.4 V at 20 mA) when a North or South pole is sensed, up to 20 mA max output current, applied voltage -0.5 V to 28 V, and 10 µA max leakage when off.

Key specifications

Parameter Value
Manufacturer Honeywell
Package TO-92S
Category Magnetic Sensors
Pins 3

Electrical characteristics

Limits as printed in the datasheet (page.json metadata.characteristics carries them as data).

Parameter Symbol Min Typ Max Unit Conditions Page
Supply voltage (SS451A/SS551AT) 3 24 V -40 °C to 150 °C [-40 °F to 302 °F] 2
Supply voltage absolute maximum -28 28 V 1
Applied output voltage absolute maximum -0.5 28 V 1
Output current absolute maximum 20 mA 1
Output current 20 mA 2
Vsat Vsat 0.4 V at 20 mA, Gauss > Bop positive or Gauss < Bop negative 2
Output leakage current 10 µA Gauss > Bop+ or < Bop- 2
Output switching time rise 1.5 µs Vsupply = 12 V at 25 °C [77 °F], RL =1.6 kOhm, CL = 20 pF 2
Output switching time fall 1.5 µs Vsupply = 12 V at 25 °C [77 °F], RL =1.6 kOhm, CL = 20 pF 2
Operate point positive 35 85 135 Gauss 2
Operate point negative -135 -85 -35 Gauss 2
Release point positive 10 40 120 Gauss 2
Release point negative -120 -40 -10 Gauss 2
Differential (hysteresis) 5 45 80 Gauss 2
Operating temperature -40 150 °C 2
Storage temperature -40 150 °C 2
Supply current (Vsupply = 5 V) 4.5 6 mA Vsupply = 5 V at 25 °C [77 °F] 2
Supply current (Vsupply = 3 V) 3.5 5 mA Vsupply = 3 V at 25 °C [77 °F] 2
Thermal resistance (SS451A) 233 °C/W 2

CAD (KiCad official)

  • Symbol: SS451A
  • Footprint: Package_TO_SOT_THT:TO-92_Inline
  • 3D model: TO-92S (KiCad packages3D, STEP)
  • 3D model files: ss451a-etched.step / ss451a-etched.glb carry the MPN laser-etched on the die in a toggleable Adom.LaserEtch group (Fusion-ready); ss451a.step / ss451a.glb are the bare package body.

Provenance

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

  • Datasheet: Honeywell datasheet (4 pp, sha256 2ca047ac2ac8950e, retrieved 2026-10-18, 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