Equivalent & Substitute Parts for ERZ-CF2MK680

Part Overview

The ERZ-CF2MK680 is a 68 V, 50 A surface mount varistor manufactured by Panasonic Electronic Components, part of the ZNR® series. This component is designed for transient voltage suppression in single-circuit applications with a 2-SMD J-Lead package configuration. The part is currently obsolete, making identification of suitable substitute components essential for ongoing system support and new design implementations.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	68 V
Varistor Voltage Range	61 V – 75 V
Current - Surge	50 A
Maximum AC Volts	40 V
Maximum DC Volts	56 V
Energy	1.2 J
Number of Circuits	1
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount, MLCV
Package / Case	2-SMD, J-Lead

Substitute Part Grouping Explanation

Substitute components for the ERZ-CF2MK680 are qualified based on the following electrical and mechanical parameters:

Varistor Voltage: Nominal value of 68 V with acceptable range of 61 V – 75 V
Number of Circuits: Single circuit configuration
Mounting Type: Surface mount MLCV technology
Package Configuration: 2-SMD J-Lead form factor
Operating Temperature: -40°C to 85°C compatibility
Maximum Voltage Ratings: AC 40 V / DC 56 V compliance

Substitutes may vary in surge current capacity and energy rating while maintaining the core voltage suppression characteristics and physical mounting requirements.

Parameter Comparison

Parameter	ERZ-CF2MK680 (Main)	ERZ-VF2M680 (Direct)	B72650M0400K072 (Similar)
Manufacturer	Panasonic Electronic Components	Panasonic Electronic Components	EPCOS - TDK Electronics
Varistor Voltage (Typ)	68 V	68 V	68 V
Varistor Voltage Range	61 V – 75 V	61 V – 75 V	61.2 V – 74.8 V
Current - Surge	50 A	125 A	100 A
Energy	1.2 J	2.5 J	1.3 J
Maximum AC Volts	40 V	40 V	40 V
Maximum DC Volts	56 V	56 V	56 V
Number of Circuits	1	1	1
Operating Temperature	-40°C to 85°C	-40°C to 85°C	-40°C to 85°C
Mounting Type	Surface Mount, MLCV	Surface Mount, MLCV	Surface Mount, MLCV
Package / Case	2-SMD, J-Lead	2-SMD, J-Lead	3225 (8063 Metric)
Product Status	Obsolete	Active	Active
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

ERZ-VF2M680 is the primary direct substitute for the ERZ-CF2MK680. Both components are manufactured by Panasonic Electronic Components within the ZNR® series, share identical voltage ratings and package configuration, and maintain full electrical compatibility. The ERZ-VF2M680 offers enhanced surge current capacity (125 A versus 50 A) and higher energy rating (2.5 J versus 1.2 J), providing superior transient suppression capability. The ERZ-VF2M680 is ROHS3 compliant and currently in active production with substantial inventory availability.

B72650M0400K072 is a cross-manufacturer alternative manufactured by EPCOS - TDK Electronics. This component maintains equivalent voltage ratings and operating temperature range. The surge current rating of 100 A and energy rating of 1.3 J position it between the original and primary substitute specifications. The package configuration differs (3225 metric versus 2-SMD J-Lead), requiring PCB layout verification for mechanical compatibility. This part is ROHS3 compliant and actively produced.

Both substitute parts satisfy the core electrical requirements and compliance standards necessary for replacement applications.

Frequently Asked Questions (FAQ)

Q: Can ERZ-VF2M680 be used as a direct replacement for ERZ-CF2MK680?

A: Yes. Both components share identical varistor voltage ratings (68 V nominal, 61–75 V range), maximum voltage limits (40 V AC / 56 V DC), single-circuit configuration, and 2-SMD J-Lead package. The ERZ-VF2M680 provides higher surge current and energy ratings, making it functionally superior for the same application space.

Q: What is the primary difference between ERZ-VF2M680 and B72650M0400K072?

A: Both maintain equivalent voltage suppression characteristics. The key differences are manufacturer (Panasonic versus EPCOS-TDK), surge current capacity (125 A versus 100 A), and package form factor (2-SMD J-Lead versus 3225 metric). Package differences require PCB layout verification before implementation.

Q: Are there compliance considerations when substituting the obsolete ERZ-CF2MK680?

A: Yes. The original ERZ-CF2MK680 is RoHS non-compliant. Both substitute parts (ERZ-VF2M680 and B72650M0400K072) are ROHS3 compliant, meeting current environmental and regulatory standards for new designs and production systems.

Q: Does higher surge current rating in substitute parts affect circuit operation?

A: No. Higher surge current and energy ratings in substitute components provide enhanced transient suppression capability without affecting normal circuit operation. The varistor voltage characteristics remain identical, ensuring equivalent voltage clamping behavior.

Q: Can B72650M0400K072 be used if PCB layout accommodates the 3225 metric package?

A: Yes, provided the PCB footprint is designed for the 3225 (8063 metric) package configuration. Electrical performance is equivalent to the original part across all specified operating parameters and voltage ranges.

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