|Single side stable type|
A single value (or narrow range) of source voltage intended by design to be applied to the coil or input.
The value of current flow in the coil when nominal voltage is impressed on the coil
The value of power used by the coil at nominal voltage. For DC coils expressed in watts; AC expressed as volt amperes. Nominal Power (W or VA) = Nominal Voltage × Nominal Current.
This is the DC resistance of the coil in DC type relays for the temperature conditions listed in the catalog. (Note that for certain types of relays, the DC resistance may be for temperatures other than the standard 20℃ 68℉.)
As the voltage on an unoperated relay is increased, the value at or below which all contacts must function (transfer).
As the voltage on an operated relay is decreased, the value at or above which all contacts must revert to their unoperated position.
The maximum voltage that can be applied continuously to the coil without causing damage. Short duration spikes of a higher voltage may be tolerable, but this should not be assumed without first checking with the manufacturer.
Denotes the contact mechanism and number of contacts in the contact circuit.
|Form A contacts
(normally open contacts)
|Form B contacts
(normally closed contacts)
|Form C contacts
The design value in watts (DC) or volt amperes (AC) which can safely be switched by the contacts. This value is the product of switching voltage x switching current, and will be lower than the maximum voltage and maximum current product.
The maximum open circuit voltage which can safely be switched by the contacts. AC and DC voltage maximums will differ in most cases.
The maximum current which can safely be switched by the contacts. AC and DC current maximums may differ.
The upper limit of power which can be switched by the contacts.Care should be taken not to exceed this value.
This value is the combined resistance of the resistance when the contacts are touching each other, the resistance of the terminals and contact spring. The contact resistance is measured using the voltage-drop method as shown below. The measuring currents are designated.
|Rated Contact Current or
Switching Current (A)
|Test Current (mA)|
|1 or more||1,000|
The resistance can be measured with reasonable accuracy on a YHP 4328A milliohmmeter. In general, for relays with a contact rating of 1A or more, measure using the voltage-drop method at 1A 6V DC.
The maximum current which after closing or prior to opening, the contacts can safely pass without being subject to temperature rise in excess of their design limit, or the design limit of other temperature sensitive components in the relay (coil, springs, insulation, etc.). This value is usually in excess of the maximum switching current.
The resistance value between all mutually isolated conducting sections of the relay, i.e. between coil and contacts, across open contacts and between coil or contacts to any core or frame at ground potential. This value is usually expressed as "initial insulation resistance" and may decrease with time, due to material degradation and the accumulation of contaminants.
The maximum voltage which can be tolerated by the relay without damage for a specified period of time, usually measured at the same points as insulation resistance. Usually the stated value is in VAC (RMS) for one minute duration.
The elapsed time from the initial application of power to the coil, until the closure of the Form A (normally open) contacts. (With multiple pole devices the time until the last contact closes.) This time does not include any bounce time.
The elapsed time from the initial removal of coil power until the reclosure of the Form B (normally closed) contacts (last contact with multi-pole). This time does not include any bounce time.
Generally expressed in time (ms), this refers to the intermittent switching phenomenon of the contacts which occurs due to the collision between the movable metal parts or contacts, when the relay is operated or released.
The acceleration which can be tolerated by the relay during service without causing the closed contacts to open for more than the specified time. (usually 10 µs)
The acceleration which can be withstood by the relay during shipping or installation without it suffering damage, and without causing a change in its operating characteristics. Usually expressed in "G"s. However, test was performed a total of 18 times, six times each in three-axis directions.
The vibration which can be tolerated by the relay during service, without causing the closed contacts to open for more than the specified time.
The vibration which can be withstood by the relay during shipping, installation or use without it suffering damage, and without causing a change in its operating characteristics. Expressed as an acceleration in G’s or displacement, and frequency range. However, test was performed a total of six hours, two hours each in three-axis directions.
The minimum number of times the relay can be operated under nominal conditions (coil voltage, temperature, humidity, etc.) with no load on the contacts.
The minimum number of times the relay can be operated under nominal conditions with a specific load being switched by the contacts.
This refers to the maximum switching frequency which satisfies the mechanical life or electrical life under repeated operations by applying a pulse train at the rated voltage to the operating coil.
1. Except where otherwise specified, the tests above are conducted under standard temperature and humidity (15℃ to 35℃ 59℉ to 95℉, 25 to 85%).
2. The coil impressed voltage in the switching tests is a rectangular wave at the rated voltage.
|Automotive Power Relays-Small Size, Light Weight|
|Mini-ISO Automotive Relay|
|Compact Slim Twin and Single Type Automotive Relay|
|Micro-ISO Automotive Relay|
|High load relay for smart J/B.|
|Max.150 A continuous carrying current latching relay|
|Middle load relay for smart J/B.|
|Compact Flat Size for Automotive|
|CP Relays Power type|
|High Carrying Current Type Miniature Low Profile Automotive Relay|
|1 Form C Automotive Silent Relay|
|Small and Slim Automotive Relay|
|CT Relay Power type|
|High Carrying Current Type Small And Slim Automotive Relay|
|Micro-ISO Automotive Low Profile Relay|
|Automotive Relay for Failsafe Circuits in High Output Motors (EPS)|
|Small, High Capacity, High Voltage DC Plug in Type Relay|
|High voltage DC, High Capacity Cut-off Relays using Capsule Contact Mechanism|
|Capsule Contact High Voltage Cut-off Switch|
|1 Form C Automotive Silent Relay|
|Miniature PC Board, Twin Type, 1 Form C Automotive Relay|
|TB Relays Power type|
|High Carrying Current 1 Form A Type Relay for Miniature PC board|
|High Load Relay for Smart J/B|
|Super Miniature PC Board, Twin Type, 1 Form C Automotive Relay|
|High Load Relay for Smart J/B|
|Miniature PC Board, Twin, 1 Form C, Surface-Mount Type Automotive Relay|
|Middle Load Relay for Smart J/B|
|High Load Relay for Smart Junction Box|
|High Capacity Relay for Smart Junction Box|