20 Amp Micro K (Single & Dual)
PC Board Relay
for Automotive Applications
• 30A, 16VDC switching rating.
• 40A inrush at 16VDC.
• 20A continuous contact rating @ 85°C.
• Immersion cleanable plastic case with knock-off nib for ventilation.
• 60% less volume than other comparable power relays.
• 1 Form A and 1 Form C arrangements in single and dual relay packages.
• Choice of AgNi 0.15 or AgSnO contacts.
Must Operate and Must Release Voltage: See Coil Data table.
Initial Operate Time: 3 milliseconds, typical, with rated coil voltage
Initial Release Time: 1.5 milliseconds, typical, with zero volts applied (for
unsuppressed relays after having been energized at
rated coil voltage.)
All parametric, environmental and life tests are performed according to
EIA Standard RS-407-A at standard test conditions (23°C Ambient, 20-50%
RH, 29.5 ± 1.0" Hg.) unless otherwise noted.
Arrangements: 1 Form A (SPST-NO) and 1 Form C (SPDT) in single relay
and dual relay configurations.
Material: AgNi 0.15 - Recommended for inductive loads.
AgSnO - Recommended for high inrush, lamp and capacitive
loads and applications prone to contact material transfer.
Max. Switching Rate: 20 operations per second with no contact load.
6 operations per minute for rated life at rated load.
Max. Load Current (@ 14VDC Load Voltage):
Max. Continuous Current
Max. Break Current
Max. Make Current
Max. Switching Power: 35-320 watts DC (voltage dependent).
Min. Recommended Current: 0.5 amp @ 12VDC.
Initial Voltage Drop: 200 millivolts, maximum, for normally open contacts
@ 10 amp contact load.
250 millivolts, maximum, for normally closed contacts
@ 5 amp contact load.
Expected Life: 10 million operations, mechanical; 100,000 operations at 20
amps, 14VDC, resistive load on normally open contact.
Initial Dielectric Strength
Between Contacts and Coil: 500V rms.
Voltage: 12 VDC.
Resistance: See Coil Data table.
Nom. Power: 0.55 watts @ 23°C coil temp. and rated coil voltage.
Thermal Resistance: 50°C per actual coil watt in still air with no contact
Temperature Range: Storage: -40°C to +155°C.
Operating: -40°C to +105°C .
Shock: 20g, 11 milliseconds, half sine wave pulse.
Vibration: (For NC contacts, NO contacts are significantly higher.)
10-40 Hz., 1.27mm double amplitude.
40-70 Hz., 5g's constant.
70-100 Hz., 0.5mm double amplitude.
100-500 Hz., 10g's constant.
Termination: Printed circuit terminals.
Enclosure: Immersion cleanable, sealed plastic cover.
Weight: Sealed: 4 gm (0.14 oz.) approximately.
Overload Current: 50A, 5 sec.(2)
87.5A, 0.5 sec.
150A, 0.1 sec.
24V Jump Start: 24VDC for 5 minutes conducting rated contact current
Drop Test: Capable of meeting specifications after a 1.0 meter drop
onto concrete in final enclosure.
Flammability: UL94-HB or better (meets FMVSS 302).
(1) Allowable overdrive is rated at ambient temperature of 23°C and 105°C
as stated with no load current flowing through the relay contacts and
minimum coil resistance with power applied for 30 sec. max. (20%
max. duty cycle.)
(2) Current and times are compatible with circuit protection by a typical 25A
fuse. Relay will make, carry and break the specified current.
Coil Data (@ 23°C Coil Temperature)