ROV07-470K Equivalent & Substitute Parts

Part Overview

The ROV07-470K is a 47V 250A disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component is classified as obsolete, making equivalent substitutes necessary for ongoing production and maintenance requirements. The part operates across a temperature range of -40°C to 125°C and meets ROHS3 compliance standards. Identifying functionally equivalent alternatives ensures design continuity and supply chain reliability.

Key Parameters

Parameter	Value
Manufacturer Part Number	ROV07-470K
Manufacturer	Littelfuse Inc.
Category	Transient Voltage Suppressors (TVS)
Varistor Voltage (Typ)	47 V
Current - Surge	250 A
Maximum DC Volts	38 V
Maximum AC Volts	30 V
Energy	3 J
Mounting Type	Through Hole
Package / Case	Disc 7mm
Operating Temperature	-40°C ~ 125°C
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the ROV07-470K are selected based on the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

Varistor voltage (typical): 47 V ±5.4 V (range 42.3 V to 51.7 V)
Maximum DC voltage: 38 V
Maximum AC voltage: 30 V
Surge current capability: minimum 250 A
Number of circuits: 1

Mechanical Compatibility Criteria:

Mounting type: Through Hole
Package form: Disc configuration
Physical dimensions: 7mm or 8.5mm disc diameter

Compliance Requirements:

RoHS3 compliance mandatory
REACH unaffected status

All three substitute parts meet these core substitution criteria. Variations in energy rating, capacitance, and operating temperature ranges are secondary parameters that do not prevent functional substitution in standard applications.

Parameter Comparison

Parameter	ROV07-470K	V47ZA1P	B72207S0300K211	ERZ-V07D470
Manufacturer	Littelfuse Inc.	Littelfuse Inc.	EPCOS - TDK Electronics	Panasonic Electronic Components
Product Status	Obsolete	Active	Active	Active
Varistor Voltage (Min)	42.3 V	42.3 V	42.3 V	42 V
Varistor Voltage (Typ)	47 V	47 V	47 V	47 V
Varistor Voltage (Max)	51.7 V	51.7 V	51.7 V	52 V
Maximum DC Volts	38 V	38 V	38 V	38 V
Maximum AC Volts	30 V	30 V	30 V	30 V
Current - Surge	250 A	250 A	250 A	500 A
Energy	3 J	1.8 J	2 J	2.8 J
Number of Circuits	1	1	1	1
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Package / Case	Disc 7mm	Disc 7mm	Disc 7mm	Disc 8.5mm
Operating Temperature	-40°C ~ 125°C	-55°C ~ 85°C	-40°C ~ 105°C	-40°C ~ 85°C
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

V47ZA1P (Littelfuse Inc.) This substitute maintains identical electrical specifications to the ROV07-470K with matching varistor voltage range, maximum voltage ratings, and surge current capacity. The part is active in production with ROHS3 compliance. The operating temperature range is -55°C to 85°C, which is narrower than the original part. This substitute is suitable for applications where the upper temperature limit of 85°C is acceptable. Packaging is available in bulk form.

B72207S0300K211 (EPCOS - TDK Electronics) This substitute provides equivalent electrical performance with identical varistor voltage specifications and maximum voltage ratings. The surge current capacity matches at 250 A. Operating temperature range extends to 105°C, providing broader high-temperature coverage than V47ZA1P. The part is active in production with ROHS3 compliance and is supplied in cut tape packaging. This option is suitable for applications requiring extended temperature operation up to 105°C.

ERZ-V07D470 (Panasonic Electronic Components) This substitute offers enhanced surge current capability at 500 A, exceeding the original 250 A specification. Varistor voltage specifications remain within acceptable tolerance. The package diameter is 8.5mm compared to the original 7mm, requiring verification of physical space constraints in the application. Operating temperature range is -40°C to 85°C. The part is active in production with ROHS3 compliance. This option is suitable for applications requiring higher transient current handling capacity where physical space permits the larger disc diameter.

Frequently Asked Questions (FAQ)

Q: Can V47ZA1P be used as a direct replacement for ROV07-470K? A: V47ZA1P is electrically equivalent with matching varistor voltage (47 V typical), maximum voltage ratings (38 V DC, 30 V AC), and surge current (250 A). The primary consideration is the operating temperature range, which is -55°C to 85°C versus the original -40°C to 125°C. Substitution is valid for applications operating within the -55°C to 85°C window.

Q: What is the difference between B72207S0300K211 and V47ZA1P? A: Both parts share identical electrical specifications. The key difference is operating temperature range: B72207S0300K211 operates to 105°C while V47ZA1P operates to 85°C. B72207S0300K211 is supplied in cut tape packaging versus bulk for V47ZA1P. Select B72207S0300K211 for applications requiring higher temperature operation.

Q: Why does ERZ-V07D470 have a higher surge current rating of 500 A? A: ERZ-V07D470 is designed with enhanced transient suppression capability. The 500 A surge current rating exceeds the original 250 A specification, providing additional margin for high-energy transient events. This part is suitable for applications with more severe transient conditions.

Q: Is the 8.5mm disc diameter of ERZ-V07D470 compatible with ROV07-470K footprints? A: The original ROV07-470K uses a 7mm disc diameter. ERZ-V07D470 uses an 8.5mm disc diameter. Physical space verification is required before substitution. The larger diameter may not fit existing PCB layouts designed for 7mm components.

Q: Are all substitute parts RoHS3 compliant? A: Yes. V47ZA1P, B72207S0300K211, and ERZ-V07D470 are all ROHS3 compliant and REACH unaffected, matching the compliance status of the original ROV07-470K.

Q: Which substitute should I select for a new design? A: For new designs, select based on application temperature requirements and physical constraints. B72207S0300K211 offers the broadest operating temperature range (-40°C to 105°C) with standard 7mm disc diameter. V47ZA1P is suitable for -55°C to 85°C applications. ERZ-V07D470 is appropriate only if higher surge current capacity is required and the 8.5mm diameter fits the layout.

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