VG-1000

The VG-1000 is a series of general-use disc varistors [1]. The Agenda radioelectronistului (2nd edition, 1989) gives no table for it, only a list of characteristics: a nominal voltage Un of 27 V (82 V), a nominal current In of 3 mA (2 mA), a rated power Pn of 0.8 W (0.6 W) at 25 °C, a voltage tolerance of ±20 %, a current asymmetry A of at most 10 %, a nonlinearity coefficient of at least 3, a temperature coefficient αT of at most 0.8 %/°C, a temperature range of −40…+100 °C and the marking in clear („VG 27; VG 82”) [1]. The two variants here follow the marking: the values in brackets go with the 82 V type [1].

The Agenda radioelectronistului names IPEE Electro-Argeș of Curtea de Argeș as the producer of the varistors in its section on varistors made in Romania, in both editions [3][4]. Un secol de electronică în România says that the works’ resistor catalogue (in English) covered 16 families of resistors, among them varistors and thermistors [5].

Coded as [3]:

Part	Meaning
V	component type: varistor
G, P, T	main field of use: G = low voltage, general use; P = low voltage, for protecting contacts; T = high voltage
1…9	construction type: 1 = disc without leads; 2 = the same, impregnated; 3 = lacquered disc; 4 = the same, impregnated; 5 = cylinder; 6 = the same, lacquered; 7 = bead („perlă”); 8 = the same, lacquered; 9 = washer („șaibă”)
0…6	maximum admissible current (field P): 0 = 0.5 mA, 1 = 2 mA, 2 = 1.7 mA, 3 = 3.0 mA, 4 = 5.0 mA, 5 = 9.0 mA, 6 = 15 mA
1…5	nominal current (fields G, T): 1 = 1 mA, 2 = 2 mA, 3 = 3 mA, 4 = 10 mA, 5 = 100 mA
01, 04, 08, 10, 20	rated dissipated power (Pdn): 0.1, 0.4, 0.8, 1.0 and 2.0 W
(optional)	other characteristics: Un = nominal voltage, Uk = classification voltage

The book’s example is „VP 1204 – 48 V”; „1 = 2 mA” is printed so in both editions, between 0.5 and 1.7 mA [3][4]. The book does not explain the codes in its tables digit by digit.

The drawing (fig. 19.4) gives a disc of 12 ± 2 mm, 2 ± 1 mm thick, with leads of Ø 0.8 ± 0.1 mm, at least 50 mm long [1]. The 1st edition (1983) calls the series VG-1308 and gives only the 27 V type (3 mA, 0.8 W), marked in clear with Un (fig. 3.4.4) [2].