Classification by Panasonic Corporation
Basic Structure and Operation Principles
Basic Structure
Operation Principle
1.Turn the switch on.
2.Electric current flows to the coil wire wound on the iron core through the coil terminal: The iron core is magnetized.
3.The magnetized iron core draws the armature.
4.The drawn armature, which touches the iron core, pushes the movable contact through the card.
5.When pushed, the movable contact touches the fixed contact, electric current passes through the contact terminal and turns on the bulb.
6.Turning off the switch causes the electric current to stop: The iron core loses the power necessary to draw the armature.
7.The power of the movable spring returns the armature to its original position: The iron core and the armature are separated, turning off the bulb.
Features
1.The coil part and the contact part are completely insulated, forming separate circuits.
- High insulation, high withstand pressure
- High resistance against surges and noise
- No leakage current when opening the circuit
- Applicable to analog and high frequency signals
2.One input to the coil part simultaneously opens or shuts several independent circuits.
- Variable contact structures
- Able to control high capacitive loads
Classification by Protective Structure
- Dust Cover Type
- To protect from dust, these types are covered, for example, with a plastic case. We recommend hand soldering, because these relays are not constructed to prevent flux and cleaning fluid from entering during automatic soldering.
- Flux-Resistant Type
- The relay is constructed so that flux will not enter inside the relay during automatic soldering. However, cleaning is not possible.
- Sealed Type
- Construction is designed to prevent seeping of flux when soldering and cleaning fluid when cleaning. Designed for minimal release of harmful gas at the contacts.
- Sealed capsule type
- This type is hermetically sealed with ceramic and metal plating. No harmful gas or humidity will ever reach the contacts. This type cannot be washed.
| Type | Construction | Characteristics | Automatic Soldering | Automatic Cleaning | Dust Resistance | Harmful Gas Resistance |
|---|---|---|---|---|---|---|
| Dust Cover Type |  |
Most basic construction where the case and base (or body) are fitted together. | Caution | No | Caution | No |
| Flux-Resistant Type |  |
Terminals are sealed or molded simultaneously. The joint between the case and base is higher than the surface of the PC board. | Yes | No | Caution | No |
 |
Terminals, case and base are filled with sealing resin. Construction is not hermetically sealed. |
Yes | No | Caution | No | |
| Sealed Type |  |
Sealed construction including terminals and case. The base is sealed with sealing resin. | Yes | Yes | Yes | Yes * |
| Sealed capsule type (EP and EV relays only) |
 |
Hermetically sealed construction by sealing the metal case and plate, and the terminal and ceramic part, with solder. | No | No | Yes | Yes |
*Since the plastic material is porous, please avoid atmospheric exposure to silicon.
Classification by Operating Functions
- Single Side Stable Type
- Relay which turns on when the coil is energized and turns off when de-energized.
(Schematic example: DS relay) - 1 Coil Latching Type
- Relay with latching construction that can maintain the on or off state with a pulse input. With one coil, the relay is set or reset by applying signals of opposite polarities.
(Schematic example: DS relay)
- 2 Coil Latching Type
- Relay with latching construction composed of 2 coils: set coil and reset coil. The relay is set or reset by alternately applying pulse signals of the same polarity.
(Schematic example: DS relay) - Operation Indication
- Indicates the set and reset states (electrically or mechanically) for easy maintenance. Also available are an LED version (HC relay with LED, etc.).
LED type HC relay
Terminal Configuration
| Type | PC board through hole terminal | PC board self-clinching terminal | Plug-in terminal | Quick connect terminal | Screw terminal |
|---|---|---|---|---|---|
| Typical relay |  |
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| Terminal configuration |  |
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| Typical relay type |
GQ Relays TX Relays DS Relays |
TQ Relays TX Relays |
HJ Relays HN Relays |
LE Relays LF Relays |
HE Relays EP Relays CN-L Relays |
Mounting Method
| Type | Insertion mount | Socket mount | Terminal socket mount | TM type | TMP type |
|---|---|---|---|---|---|
| Mounting configuration |  |
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| Typical relay options |
TQ Relays DS Relays S Relays |
NC Relays HC Relays |
HJ Relays HC Relays |
HC Relays HL Relays |
LE Relays LF Relays |
* Some relays for printed boards have sockets. (Such as the S and ST relays)
