11 Insulation Specifications

PARAMETER		TEST CONDITIONS	VALUE		UNIT
PARAMETER		TEST CONDITIONS	DW-16	D-8	UNIT
IEC 60664-1
CLR	External clearance⁽¹⁾	Shortest terminal-to-terminal distance through air	8	4	mm
CPG	External creepage⁽¹⁾	Shortest terminal-to-terminal distance across the package surface	8	4	mm
DTI	Distance through the insulation	Minimum internal gap (internal clearance)	17	17	μm
CTI	Comparative tracking index	DIN EN 60112 (VDE 0303-11); IEC 60112; UL 746A	>600	>600	V
	Material Group	According to IEC 60664-1	I	I
	Overvoltage category per IEC 60664-1	Rated mains voltage ≤ 150 V_RMS	I–IV	I-IV
		Rated mains voltage ≤ 300 V_RMS	I–IV	I-III
		Rated mains voltage ≤ 600 V_RMS	I–IV	n/a
		Rated mains voltage ≤ 1000 V_RMS	I-III	n/a
DIN EN IEC 60747-17 (VDE 0884-17)⁽²⁾
V_IORM	Maximum repetitive peak isolation voltage	AC voltage (bipolar)	2121	637	V_PK
V_IOWM	Maximum working isolation voltage	AC voltage; time-dependent dielectric breakdown (TDDB) test, see Section 25.2.3.1	1500	450	V_RMS
V_IOWM	Maximum working isolation voltage	DC voltage	2121	637	V_DC
V_IOTM	Maximum transient isolation voltage	V_TEST = V_IOTM , t = 60 s (qualification); V_TEST = 1.2 × V_IOTM, t = 1 s (100% production)	8000	4242	V_PK
V_IMP	Maximum impulse voltage⁽³⁾	Tested in air, 1.2/50-μs waveform per IEC 62368-1	8000	5000	V_PK
V_IOSM	Maximum surge isolation voltage⁽⁴⁾	V_IOSM ≥ 1.3 x V_IMP; Tested in oil (qualification test), 1.2/50-μs waveform per IEC 62368-1	12800	10000	V_PK
q_pd	Apparent charge⁽⁵⁾	Method a: After I/O safety test subgroup 2/3, V_ini = V_IOTM, t_ini = 60 s; V_pd(m) = 1.2 × V_IORM, t_m = 10 s	≤ 5	≤ 5	pC
		Method a: After environmental tests subgroup 1, V_ini = V_IOTM, t_ini = 60 s; V_pd(m) = 1.6 × V_IORM, t_m = 10 s	≤ 5	≤ 5
		Method b: At routine test (100% production) and preconditioning (type test); V_ini = 1.2 x V_IOTM, t_ini = 1 s; V_pd(m) = 1.875 x V_IORM (ISO7710), t_m = 1 s (method b1) or V_pd(m) = V_ini, t_m = t_ini(method b2)	≤ 5	≤ 5
C_IO	Barrier capacitance, input to output⁽⁶⁾	V_IO = 0.4 × sin (2 πft), f = 1 MHz	?0.4	?0.4	pF
R_IO	Insulation resistance⁽⁶⁾	V_IO = 500 V, T_A = 25°C	> 10¹²	> 10¹²	Ω
		V_IO = 500 V, 100°C ≤ T_A ≤ 125°C	> 10¹¹	> 10¹¹
		V_IO = 500 V at T_S = 150°C	> 10⁹	> 10⁹
	Pollution degree		2	2
	Climatic category		55/125/21	55/125/21
UL 1577
V_ISO	Withstand isolation voltage	V_TEST = V_ISO, t = 60 s (qualification); V_TEST = 1.2 × V_ISO, t = 1 s (100% production)	5000	3000	V_RMS

(1) Creepage and clearance requirements should be applied according to the specific equipment isolation standards of an application. Care must be taken to maintain the creepage and clearance distance of a board design to verify that the mounting pads of the isolator on the printed-circuit board do not reduce this distance. Creepage and clearance on a printed-circuit board become equal in certain cases. Techniques such as inserting grooves, ribs, or both on a printed circuit board are used to help increase these specifications.

(2) This coupler is designed for safe electrical insulation only within the safety ratings. Compliance with the safety ratings shall be ensured by means of suitable protective circuits.

(3) Testing is carried out in air to determine the surge immunity of the package

(4) Testing is carried out in oil to determine the intrinsic surge immunity of the isolation barrier.

(5) Apparent charge is electrical discharge caused by a partial discharge (pd).

(6) All pins on each side of the barrier tied together creating a two-terminal device.