General view

RB 420

IPEE Curtea de Argeș

Also known as
RB 420-1; RB 420-2a; RB 420-2b; RB 420-3a; RB 420-3b; RB 420-4; RB 420-5a; RB 420-5b
Year
Unknown
Category
Components
Type
Resistors
Documentation score
1/5
Last edited
16 OCT 2026

Specifications

Type
wire-wound, ceramic body, four elements
Resistance (Rn)
1 Ω…27 kΩ
Resistance, min
1 Ω
Resistance, max
27000 Ω
Tolerance
±5 %, ±10 %
Rated power (Pn)
20 W
Temperature coefficient
±200·10⁻⁶/°C
Insulation resistance (Riz)
≥ 100 MΩ
Climatic category
40/200/21
Package
square ceramic body, axial leads
Resistive elements
4
Max. length (Lmax)
44 mm
Lead diameter (d)
0.8 mm
Application
general use

Sources: [1][2]

Description

The RB 420 is a wire-wound resistor in a square ceramic body with four resistive elements of 1 Ω to 27 kΩ each (E12 and E24), rated 20 W in all, for general use [1]. The elements can be connected in eight ways, shown in fig. 16.15 as RB 420-1, RB 420-2a, RB 420-2b, RB 420-3a, RB 420-3b, RB 420-4, RB 420-5a and RB 420-5b [1].

The Agenda radioelectronistului names IPEE Electro-Argeș of Curtea de Argeș as the producer of all the resistors in its section on resistors made in Romania, in both editions [3][4]. Un secol de electronică în România says that the works, founded in 1972 as ICEP, took over the resistor lines that IPRS Băneasa made under a Thomson-CSF licence: the carbon resistors in 1973 and the wire-wound resistors in 1974 [5].

Coded as [3]:

Part Meaning
RB construction type: wire-wound resistor
420 by exception the number is 420 (four resistive elements) and not 020 (Pn = 20 W)

Romanian resistors are generally marked in clear, with the series code, the nominal value (100 = 100 Ω, 1 K = 1 kΩ, 1 M = 1 MΩ), the tolerance and the rated power [3].

The 1st edition (1983) calls the series RB and gives the same data [2].

Resistance: 4 × (1 Ω…27 kΩ). Dimensions in mm (fig. 16.14): body at most 44 long, section 18 ± 1 × 18 ± 1, leads Ø 0.8 ± 0.01, at least 30 long [1].

Gallery

IPEE Curtea de Argeș RB 420: Drawing (fig. 16.14)No image available
Drawing (fig. 16.14)
IPEE Curtea de Argeș RB 420: Connections (fig. 16.15)No image available
Connections (fig. 16.15)

Documents

No documents available yet.

References

  1. [1]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, section 16.3.13 „Rezistoare bobinate în corp ceramic, seria RB 420”, pp. 191–192
  2. [2]N. Drăgulănescu – „Agenda radioelectronistului”, 1st edition, Editura Tehnică, 1983, section 3.1.3.13 „Rezistoare bobinate în corp ceramic – seria RB”, pp. 160–161
  3. [3]N. Drăgulănescu – „Agenda radioelectronistului”, 2nd edition, Editura Tehnică, 1989, section 16.3 „Rezistoare produse în R.S.R.”, 16.3.1 „Codificare – marcare”, p. 184
  4. [4]N. Drăgulănescu – „Agenda radioelectronistului”, 1st edition, Editura Tehnică, 1983, section 3.1.3 „Rezistoare produse în R.S.R.”, 3.1.3.1 „Codificare – marcare”, p. 153
  5. [5]N. Millea, I. Constantinescu (coord.) – „Un secol de electronică în România”, Editura Academiei Române, 2020, sections VIII.1.2.6 and VIII.2, pp. 410 and 434–435