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Voltage regulator JA112A1
General information
Connection diagram
Dimensional drawing


General information:

The voltage regulator JA112A1 is purposed for voltage maintenance of onboard vehicle network in predetermined limits in all system operation modes of electrical equipment at change of the rotation frequency of the alternator rotor, electrical load and environment temperature.

Applicability: automobiles AZLK, ZIL, IG, LAZ, LiAZ, PAZ, PAF, "Tavriya" 91-96 years of manufacture and others with the alternators 17.3701, 29.3701, 58.3701, 66.3701, G287 and their modificatons.

The given item is developed specially for exploitation in various latitudes with a large range of environment temperature. The regulator is produced in a single climatic design О2.1 in accordance with GOST 15150 for internal market and for export. On extent of protection against penetration of foreign bodies and water, the item meets design IP68 in accordance with GOST 14254. Against moisture penetration the regulator is protected by special high-heat-conducting compound with an operating temperature up to 200 °С. The regulator JA112A1 is designed on a single-wire power circuit, the item housing is connected to the vehicle housing. An operating mode of the regulator is S1 in accordance with GOST 3940.

The regulator is mounted in the brush unit of the alternator where the setting of regulators JA112A or JA112A1 with the help of standard screws is stipulated.

The warranty period of exploitation is 3 years from the date of commissioning or from the date of sale in retail commercial network. The warranty obligations of the manufacturer are valid during four years from the date of the item production. The date of production is marked on the case of the item housing.



Range of operating temperatures, °С
-45 .. +100
  Nominal regulating voltage, V
  Regulating voltage with battery at t°=(25 ± 2) °С and load of alternator 3А, V
14,0 ± 0,1
  Regulating voltage with battery at t°=(25 ± 2) °С in range of alternator load from 3A to 0.9·Imax*, V
14,0 ± 0,2
  Maximum current of output circuit, А
  Thermal compensation of regulating voltage, mV/°С
-3,0 ± 1,5
  Residual voltage on output "Ш", typical, production date till 2015 / modification 2015, V
0,9 / 0,12
  Maximum allowable long-term influence of increased supply voltage, V
  Maximum allowable influence of increased supply voltage up to 5 min., V
  Maximum allowable pulse overvoltages in accordance with GOST 28751, V
* - According to the technical conditions on the item  


Connection diagram:

Connection diagram of the voltage regulator JA112A1


Dimensional drawing:

Dimensional drawing of the voltage regulator JA112A1
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