ROV05-330K Equivalent & Substitute Parts

Part Overview

The ROV05-330K is a 33V 100A disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications with a 5mm package footprint. This component is classified as obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement planning. The varistor provides single-circuit protection with rated surge current capacity of 100A and energy absorption of 1.1J across an operating temperature range of -40°C to 85°C.

Key Parameters

Parameter	ROV05-330K
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Varistor Voltage (Typ)	33 V
Current - Surge	100 A
Energy	1.1 J
Maximum AC Volts	20 V
Maximum DC Volts	26 V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Through Hole
Package / Case	Disc 5mm
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the ROV05-330K is determined by the following critical parameters:

Varistor Voltage (Typ): Must be 33V to maintain circuit protection threshold
Varistor Voltage Range: Minimum 29.7V to 30V and Maximum 36V to 36.3V ensures functional compatibility
Maximum AC/DC Volts: Must not exceed 20V AC and 26V DC respectively
Operating Temperature Range: Must support -40°C to 85°C minimum
Mounting Type: Through hole configuration required
RoHS Compliance: ROHS3 compliance required for regulatory alignment
Number of Circuits: Single circuit configuration

The ERZ-V05D330 from Panasonic Electronic Components meets these substitution criteria with matching voltage specifications, temperature range, mounting type, and compliance certifications. While the substitute exhibits higher surge current capacity (250A versus 100A) and different package geometry (Disc 7mm versus Disc 5mm), these represent enhanced performance characteristics and do not preclude functional substitution in the specified application parameters.

Parameter Comparison

Parameter	ROV05-330K (Littelfuse)	ERZ-V05D330 (Panasonic)
Varistor Voltage (Min)	29.7 V	30 V
Varistor Voltage (Typ)	33 V	33 V
Varistor Voltage (Max)	36.3 V	36 V
Current - Surge	100 A	250 A
Energy	1.1 J	1.1 J
Maximum AC Volts	20 V	20 V
Maximum DC Volts	26 V	26 V
Number of Circuits	1	1
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Through Hole	Through Hole
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Product Status	Obsolete	Active

Engineering Selection Recommendations

The ERZ-V05D330 is the designated manufacturer-recommended substitute for the ROV05-330K. Both components maintain identical varistor voltage specifications (33V typical) and operating temperature ranges (-40°C to 85°C). Both achieve ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent applications.

The ERZ-V05D330 carries active product status, ensuring continued availability and supply chain support compared to the obsolete ROV05-330K. The substitute's higher surge current rating (250A) and increased capacitance (1400 pF @ 1 kHz versus 834 pF @ 1 kHz) provide enhanced transient suppression capability without compromising the specified electrical parameters.

Physical package differences exist: the ERZ-V05D330 uses a Disc 7mm package versus the Disc 5mm of the original part. PCB layout and mounting hole spacing must be verified for mechanical compatibility in the target application.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-V05D330 directly replace the ROV05-330K in existing designs?

A: The ERZ-V05D330 meets all critical electrical parameters (33V varistor voltage, 20V AC / 26V DC maximum ratings, -40°C to 85°C operating range). However, the package geometry differs (Disc 7mm versus Disc 5mm), requiring verification of PCB footprint and mounting hole compatibility before implementation.

Q: Why does the substitute have higher surge current capacity (250A versus 100A)?

A: The ERZ-V05D330 is rated for 250A surge current, exceeding the original 100A specification. This represents enhanced performance capability and does not prevent substitution. The component will function correctly in applications requiring 100A or less.

Q: Are both parts RoHS compliant?

A: Yes. Both the ROV05-330K and ERZ-V05D330 are ROHS3 compliant and REACH unaffected, meeting current regulatory requirements for electronic component procurement.

Q: What is the significance of the ERZ-V05D330 having active product status?

A: Active product status indicates the ERZ-V05D330 is in current production with ongoing manufacturer support and supply availability. The ROV05-330K is obsolete, meaning production has ceased and future availability cannot be guaranteed.

Q: Do the varistor voltage ranges overlap sufficiently for substitution?

A: Yes. The ROV05-330K range (29.7V to 36.3V) and ERZ-V05D330 range (30V to 36V) overlap substantially at the 33V typical specification, ensuring equivalent voltage clamping performance in the target circuit.

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