MOV-07D331KTR Equivalent & Substitute Parts

Part Overview

The MOV-07D331KTR is a 330 V, 1.2 kA transient voltage suppressor varistor manufactured by Bourns Inc. in a through-hole disc 7mm package. This component is designed for transient voltage protection in electronic circuits and is currently in active production status. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to inventory constraints, supply chain considerations, or design flexibility needs.

Key Parameters

Parameter	Value
Varistor Voltage (Typical)	330 V
Current - Surge	1.2 kA
Maximum AC Volts	210 V
Maximum DC Volts	275 V
Operating Temperature Range	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Disc 7mm
Number of Circuits	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitute parts for the MOV-07D331KTR are qualified based on the following criteria:

Electrical Compatibility Parameters:

Varistor voltage range: 297 V (Min) to 363 V (Max)
Maximum AC voltage rating: 210 V
Maximum DC voltage rating: 270 V or higher
Number of circuits: 1
Operating temperature range: -40°C minimum to 85°C minimum

Mechanical Compatibility Parameters:

Mounting type: Through Hole
Package form factor: Disc configuration

Compliance Requirements:

RoHS3 Compliant status
REACH Unaffected status
Active product status

Substitutes are grouped by surge current capacity and physical package dimensions. Parts with identical surge current (1.2 kA) and 7mm disc package provide direct mechanical and electrical equivalence. Parts with higher surge current capacity (1.75 kA) or different disc dimensions (8.5mm) are listed as functional alternatives with noted parameter variations.

Parameter Comparison

Parameter	MOV-07D331KTR (Bourns)	ERZ-E05A331 (Panasonic)	ERZ-V07D331 (Panasonic)	B72207S2211K101 (EPCOS - TDK)
Varistor Voltage (Typ)	330 V	330 V	330 V	330 V
Varistor Voltage (Min)	297 V	297 V	297 V	297 V
Varistor Voltage (Max)	363 V	363 V	363 V	363 V
Current - Surge	1.2 kA	1.2 kA	1.75 kA	1.75 kA
Maximum AC Volts	210 V	210 V	210 V	210 V
Maximum DC Volts	275 V	270 V	270 V	270 V
Energy	23 J	21 J	28 J	20 J
Capacitance @ 1 kHz	180 pF	130 pF	130 pF	140 pF
Operating Temperature Range	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 105°C
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 8.5mm	Disc 7mm
Number of Circuits	1	1	1	1
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

Direct Equivalent (Identical Surge Current & Package):

ERZ-E05A331 (Panasonic ZNR® series) is a direct substitute for MOV-07D331KTR. Both components share identical varistor voltage specifications (330 V typical), surge current capacity (1.2 kA), and disc 7mm package dimensions. Both are ROHS3 compliant and REACH unaffected. Operating temperature range is identical (-40°C ~ 85°C). Maximum DC voltage is 270 V versus 275 V on the original part, representing a 5 V reduction within acceptable tolerance margins for transient suppression applications.

Higher Surge Current Alternatives:

ERZ-V07D331 (Panasonic ZNR® series) and B72207S2211K101 (EPCOS AdvanceD series) both provide 1.75 kA surge current capacity, representing a 45.8% increase over the original 1.2 kA specification. Both maintain identical varistor voltage (330 V typical) and maximum AC voltage (210 V) ratings. ERZ-V07D331 uses a disc 8.5mm package, requiring PCB layout verification for mechanical fit. B72207S2211K101 maintains the disc 7mm package form factor. B72207S2211K101 supports extended operating temperature to 105°C versus 85°C on the original part. All three alternatives are ROHS3 compliant and REACH unaffected with active product status.

Frequently Asked Questions (FAQ)

Q: Can ERZ-E05A331 be used as a direct replacement for MOV-07D331KTR?

A: Yes. ERZ-E05A331 meets all electrical and mechanical compatibility criteria. Varistor voltage, surge current, package dimensions, and operating temperature range are identical. Maximum DC voltage is 270 V versus 275 V, a difference that does not affect transient suppression performance in standard applications.

Q: What is the difference between the 1.2 kA and 1.75 kA surge current options?

A: Surge current rating indicates the maximum transient current the varistor can suppress. The 1.75 kA alternatives (ERZ-V07D331 and B72207S2211K101) provide higher transient energy absorption capacity. Selection depends on circuit transient severity requirements. Both maintain identical varistor voltage specifications.

Q: Does ERZ-V07D331 fit in the same PCB footprint as MOV-07D331KTR?

A: No. ERZ-V07D331 uses a disc 8.5mm package versus the 7mm package of MOV-07D331KTR. PCB layout and mechanical clearance must be verified before substitution. B72207S2211K101 maintains the 7mm disc package and requires no layout modification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. MOV-07D331KTR and all listed substitutes are ROHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements.

Q: What is the significance of the capacitance difference between parts?

A: Capacitance values (130 pF to 180 pF @ 1 kHz) reflect parasitic capacitance of the varistor element. Differences in this range do not affect transient suppression function but may influence high-frequency circuit behavior. Circuit-specific testing is warranted if operating frequency exceeds 1 MHz.

Q: Can B72207S2211K101 be used in applications requiring -40°C to 85°C operation?

A: Yes. B72207S2211K101 supports -40°C to 105°C operation, exceeding the -40°C to 85°C requirement of MOV-07D331KTR. Extended temperature capability does not restrict use in standard temperature range applications.

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