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Photocoupler
1. The model of domestic relay is generally composed of main code, shape symbol, dash, serial number and anti-feature symbol.
For example: JZ C3F voltage V DC / AC . . . . . . 
2. The specification number of the domestic relay consists of the model and specification serial number. The model number and specification serial number are separated by diagonal lines, and the specification serial number cannot be used alone.
3. The serial number of the domestic relay shall be compiled according to the main characteristics of the series (coil rated voltage, installation method, terminal form or number of contact groups).
4. The model and specification number of various domestic relays are shown in Table 5: Classification No. Name Model Slash Specification No. 1 Part 2 Part 3 Part 4 Part 5 Main Name Outline Symbol Dash Number Protection Feature 1 DC Electromagnetic Relay W (mini)
C (ultra-small)
X (small)
——
——
M (seal)
F (closed) /
/
Micropower JW Weak power JR Medium power JZ High power JQ 2 AC electromagnetic relay JL 3 Magnetic holding relay JM 4 Hybrid relay See note 5 Solid state relay JG 6 High frequency relay JP 7 Coaxial relay JPT 8 Vacuum relay JPK 9 Temperature relay JU 10 Electric relay JE 11 Photoelectric relay JF 12 Special relay JT 13 Polarized relay JH 14 Electronic time relay JSB Note: The model of the hybrid relay is marked with the letter H (mixed) after the appearance of the combined electromagnetic relay model. 5. The detailed signs of domestic relay products are as follows: 
The model name of the domestic relay consists of four parts: the first part + the second part + the third part + the fourth part of the relay model. The first part uses letters to indicate the main type of the relay.
JR----small power relay
JZ----Medium power relay
JQ----high power relay
JC----Magnetic relay
JU----thermal relay or temperature relay
JT----Special Relay
JM----pulse relay
JS----time relay
JAG----Reed Relay
The second part of the relay model uses letters to indicate the shape characteristics of the relay.
W----mini
X----small
C----Subminiature
The third part of the relay model number indicates the product serial number.
Use the number to indicate the product serial number
The fourth part of the relay model uses letters to indicate the protective features.
F----closed
M----Sealed type: JRX-13F (closed low power small relay)
JR - small power relay
X - small
13 - serial number
