This specification specifies the main technical requirements for JCWG31 type air dielectric tubular (piston type) fine-tuning variable capacitors (hereinafter referred to as capacitors). This type of capacitor is a sealed type and is used for high-frequency tuning in military electronic equipment. The complete requirements for JCWG31 type capacitors are composed of this specification and SJ20032 "General Specification for Air Dielectric Tubular (Piston Type) Fine-tuning Variable Capacitors". Except for the provisions of this specification, SJ2OO32 shall be implemented. SJ 20033-1992 Detailed Specification for JCWG31 Type Air Dielectric Tubular (Piston Type) Fine-tuning Variable Capacitors SJ20033-1992 Standard download decompression password: www.bzxz.net
This specification specifies the main technical requirements for JCWG31 type air dielectric tubular (piston type) fine-tuning variable capacitors (hereinafter referred to as capacitors). This type of capacitor is a sealed type and is used for high-frequency tuning in military electronic equipment. The complete requirements for JCWG31 capacitors are composed of this specification and SJ20032 "General Specification for Air Dielectric Tubular (Piston Type) Fine-Tuning Variable Capacitors". Except as provided in this specification, all other requirements shall be in accordance with SJ20032.

1 Scope
People's Republic of China Electronic Industry Military Standard JCWG31 Type
Detailed specification for air dielectric tubular (piston type) trimmer variable capacitor.modelJCWG31SJ20033—92bzxZ.net
This specification specifies the main technical requirements for JCWG31 type air dielectric tubular (piston type) trimmer variable capacitor (hereinafter referred to as capacitor). This type of capacitor is sealed and used for high-frequency tuning in military electronic equipment. The complete requirements for JCWG31 type capacitors are composed of this specification and SJ20032 "General Specification for Air Dielectric Tubular (Piston Type) Trimmer Variable Capacitors". Except for the provisions of this specification, SJ20032 shall prevail. 2 Dimensions
The dimensions of the capacitors are shown in Figure 1 and Table 1. D
See Note ②
Note: ① The tolerance of the final dimension is ±0.40mm; ② The melting point of solder is 300±℃.
China Electronics Industry Corporation 1992-02-01 Issued 1992-05-01 Implementation
JCWG31J6
JCWG31J10
JCWG31J14
JCWG31J20
3 Requirements
3.1 Dimensions
Capacitance range (pF)
Shall comply with the provisions of Chapter 2 of this specification.
3.2 Rated working voltage
250V (D·C).
3.3 Capacitance range
See Table 1.
3.4 ​​Insulation resistance
SJ20033—92
Should not be less than 10°M2 at room temperature; should not be less than 10°Mα at 125°C. Test voltage 250±10%V(D·C).
3.5 Quality factor (Q)
See Table 1 (test frequency is 100±10MHz). 3.6 Torque
3.6~43.0mN.m (JCWG31J6 torque is 2.8~28.0mN.m). 3.7 Temperature shock
According to GJB360.7 test condition A, but the temperature of step 3 is 125±5C. 3.8 Marking
The product model (main name code can be omitted) and the manufacturer's trademark or code should be marked on the capacitor. Additional Notes:
This standard was proposed by the Military Industry Department of the Ministry of Machinery and Electronics Industry. This standard was jointly drafted by the China Electronics Technology Standardization Institute and the State-owned 897 Factory. The main drafters of this standard are Xing Jinrong, Deren, and Wei Qifu. Project code: B92012
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