CPC1977J Clare, CPC1977J Datasheet - Page 3

• Manufacturer Part Number: CPC1977J
• Description: RELAY OPTOMOS 1.25A SP-NO I4-PAC
• Manufacturer: Clare
• Series: CPC, OptoMOS®r

Specifications of CPC1977J

• Circuit: SPST-NO (1 Form A)
• Output Type: AC, DC
• On-state Resistance: 1 Ohm
• Load Current: 1.25A
• Voltage - Input: 1.2VDC
• Voltage - Load: 0 ~ 600 V
• Mounting Type: Through Hole
• Termination Style: PC Pin
• Package / Case: i4-PAC™
• Load Voltage Rating: 600 V
• Load Current Rating: 4 A
• Mounting Style: SMD/SMT
• Relay Type: Single Pole
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: CLA212; CPC1977J

2 Thermal Characteristics
2.1 Thermal Management
Device high current characterization was performed using Kunze heat sink KU 1-159, phase change thermal interface
material KU-ALC 5, and transistor clip KU 4-499/1. This combination provided an approximate junction-to-ambient
thermal resistance of 12.5°C/W.
2.2 Heat Sink Calculation
Higher load currents are possible by using lower thermal resistance heat sink combinations.
3
Thermal Resistance (Junction to Case)
Thermal Resistance (Junction to Ambient)
Junction Temperature (Operating)
T
T
I
I
R
R
P
* Elevated junction temperature reduces semiconductor lifetime.
L(99)
L
J
A
D(99)
θJC
θCA
= Desired Operating Load Current (A
= Junction Temperature (°C), T
= Ambient Temperature (°C)
= Load Current with Case Temperature @ 99°C (A
= Thermal Resistance, Junction to Case (°C/W) = 0.35°C/W
= Thermal Resistance of Heat Sink & Thermal Interface Material , Case to Ambient (°C/W)
= Maximum power dissipation with case temperature held at 99ºC = 2.86W
Parameter
R
θCA
=
Heat Sink Rating
(T
I
L
J
2
- T
•
A
P
) I
D(99)
L(99)
J
2
≤ 100°C *
- R
PRELIMINARY
Conditions
DC
www.clare.com
Free Air
), I
θJC
-
-
L
≤ I
L(MAX)
DC
Symbol
R
R
)
T
θJC
θJA
J
Minimum
-40
-
-
Typical
33
-
-
Maximum
0.35
100
-
CPC1977
Units
°C/W
°C/W
°C
R06