Automotive varistors for LIN and CAN

New Products | February 20, 2024

By Nick Flaherty

Interconnect & cables Automotive

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TDK has developed two varistors for CAN and LIN networking in automotive applications.

Both varistors have a high electrostatic discharge (ESD) withstanding voltage for safe operation of safety-critical automotive functions for CAN and LIN networking in advanced driver assistance systems (ADAS).

Both of the two new varistors in the AVRH series are compliant with the AEC-Q200 automotive standard and fulfill 25 kV voltage resistance requirement under IEC 61000-4-2 standard in the electrostatic discharge test. They operate within the temperature range of -55 °C to +150 °C. They not only meet anti-ESD requirements, they also have minimal footprints, useful as automotive OEMs attempt to miniaturize.

Varistors are fundamental circuit elements for handling severe voltage irregularities. In automotive applications, they protect delicate ECUs, and are instrumental in conforming to automotive safety standards such as AEC-Q200 and IEC 61000-4-2.

The AVRH10C220YT201MA8 is designed to support electronics on a LIN bus. It has a maximum continuous voltage of 16 V and a capacitance of 200 pF. The 1005 size (1.0 mm (L) x 0.5 mm (W) x 0.5 mm (H)) is 75% smaller than the existing model. The smaller size allows customer devices to be smaller therefore reducing the consumption of materials. This product also uses TDK’s proprietary coating technology to enhance durability. Small as it is, it achieves the high reliability needed to meet the automotive quality standard.

The AVRH16A2C270KT200NA8 is designed to support electronics on a CAN bus. It has a 2-in-1 array structure, in which the functions of two varistors are integrated into a single element. Another characteristic is that TDK’s proprietary design technology minimizes the capacitance difference between the channels. It is designed at the 1608 size (1.6 mm (L) x 0.8 mm (W) x 0.6 mm (H)).

Type	Outer dimensions [㎜]	Maximum allowable circuit voltage [V]	Capacitance [㎊]	Capacitance Difference [㏈]
AVRH10C220YT201MA8	1.0 x 0.5 x 0.5	16	200	–
AVRH16A2C270KT200NA8	1.6 x 0.8 x 0.6	19	20	1.0 Max

AVRH Series product line

size EIA	Item	VBr [V]	VDC [V]	Capacitance [pF]		LIN	CAN ,CAN−FD	Ethernet 10Base−T1S	Ethernet 100Base−T1	Ethernet 1000Base−T1
size EIA	Item	VBr [V]	VDC [V]	typ.	max.	LIN	CAN ,CAN−FD	Ethernet 10Base−T1S	Ethernet 100Base−T1	Ethernet 1000Base−T1
0402	AVRH10C270KT350NA8	27	19	35	45.5		x
0402	AVRH10C270KT150NA8	27	19	15	19.5		x
0402	AVRH10C221KT1R5YA8	220	70	1.5	1.63			x		x
0402	AVRH10C101KT1R2YE8	110	70	1.23	1.36			x		x
0402	AVRH10C101KT4R7YA8	115	70	4.7	5.27				x
0402	AVRH10C101KT1R1NE8	110	70	1.1	1.4					x
0402	AVRH10C220YT201MA8	22	16	200	240	x
0603	AVRH16A2C270KT200NA8	27	19	20	26		x