Equivalent & Substitute Parts for SCHURTER 0070.1421.B1

Part Overview

The SCHURTER 0070.1421.B1 is a 22 V, 500 A varistor with a disc 7mm package, designed for overvoltage protection in electronic circuits. It is configured for through-hole mounting and features a single circuit. The part is classified as obsolete, making the identification of substitute models essential for continued production support, maintenance, or design continuity where direct replacement is required.

Key Parameters

Parameter	Value
Manufacturer Part Number	0070.1421.B1
Maximum AC Volts	14 V
Maximum DC Volts	18 V
Varistor Voltage (Min)	20 V
Varistor Voltage (Typ)	22 V
Varistor Voltage (Max)	24 V
Current - Surge	500 A
Energy	1.3J
Number of Circuits	1
Capacitance @ Frequency	2800 pF @ 1 kHz
Operating Temperature	-40°C ~ 125°C (TA)
Mounting Type	Through Hole
Package / Case	Disc 7mm
RoHS Status	ROHS3 Compliant
REACH Status	REACH Unaffected

Substitute Part Grouping Explanation

Substitution for varistors is based strictly on matching the following key parameters: Maximum AC Volts, Maximum DC Volts, Varistor Voltage (Min/Typ/Max), Surge Current, Energy rating, Number of Circuits, Capacitance at specified frequency, Operating Temperature Range, Mounting Type, and Package/Case dimensions. Environmental compliance such as RoHS and REACH is also considered. Only parts meeting all specified requirements are identified as substitutes.

Parameter Comparison

Parameter	0070.1421.B1 (SCHURTER)	ERZ-V07D220 (Panasonic)
Maximum AC Volts	14 V	14 V
Maximum DC Volts	18 V	18 V
Varistor Voltage (Min)	20 V	20 V
Varistor Voltage (Typ)	22 V	22 V
Varistor Voltage (Max)	24 V	24 V
Current - Surge	500 A	500 A
Energy	1.3J	1.3J
Number of Circuits	1	1
Capacitance @ Frequency	2800 pF @ 1 kHz	3600 pF @ 1 kHz
Operating Temperature	-40°C ~ 125°C (TA)	-40°C ~ 85°C (TA)
Mounting Type	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 8.5mm
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
REACH Status	REACH Unaffected	REACH Unaffected

Engineering Selection Recommendations

Selection of substitute parts is determined by the product status and certificates of environmental compliance. The SCHURTER 0070.1421.B1 is obsolete, and the Panasonic Electronic Components ERZ-V07D220 is listed as active and ROHS3 compliant, with a REACH status of unaffected. Both parts share common industry certifications for environmental regulations.

Frequently Asked Questions (FAQ)

Q: What are the acceptable criteria for substituting a varistor in this product category?
A: Only devices with identical Maximum AC Volts, Maximum DC Volts, Varistor Voltage (Min/Typ/Max), Surge Current, Energy rating, Number of Circuits, and Through Hole mounting are considered substitutes. Package/case size and specified capacitance at frequency are also evaluated.

Q: Are there any differences in package size or temperature range between these models?
A: The SCHURTER 0070.1421.B1 uses a Disc 7mm package, while the Panasonic ERZ-V07D220 is Disc 8.5mm. The operating temperature range for the SCHURTER part is -40°C to 125°C; for the Panasonic part, it is -40°C to 85°C.

Q: What compliance certifications are required for these substitutes?
A: Only parts indicated as ROHS3 compliant and REACH unaffected are included as direct substitutes.

Q: How does capacitance influence varistor substitution eligibility?
A: Capacitance at the specified frequency is reviewed; the ERZ-V07D220 provides 3600 pF at 1 kHz compared with 2800 pF at 1 kHz for the original.

Q: What is the rationale for substituting obsolete parts?
A: Substitute parts with matching key parameters and active product status are identified to ensure supply continuity and maintenance capability.

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