V250PA40C Equivalent & Substitute Parts

Part Overview

The V250PA40C is a 390 V varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in chassis mount applications. This component features a 6.5 kA surge current rating and 130 J energy absorption capacity. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

V250PA40C

Littelfuse Inc.In Stock: 772V250PA40C Datasheet

Current PartRFQ

ERZ-C20EK391

Panasonic Electronic ComponentsIn Stock: 994ERZ-C20EK391 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the V250PA40C is determined by the following critical electrical and mechanical parameters:

• Varistor Voltage Rating: Nominal 390 V (acceptable range: 351 V to 429 V minimum/maximum)
• Maximum AC/DC Voltage: 250 V AC and 320 V DC minimum
• Surge Current Capacity: Minimum 6.5 kA
• Energy Absorption: 130 J minimum
• Number of Circuits: Single circuit (1)
• Mounting Configuration: Chassis mount base mount or module package
• Operating Temperature Range: Support for -40°C to 85°C minimum

The ERZ-C20EK391 from Panasonic Electronic Components meets all substitution criteria. This part maintains the same nominal varistor voltage (390 V), supports equivalent AC/DC voltage ratings, provides enhanced surge current capacity (8 kA), and delivers the required energy absorption (130 J). Both components are single-circuit, chassis-mount devices suitable for direct functional replacement.

Parameter Comparison

Engineering Selection Recommendations

The ERZ-C20EK391 is the qualified substitute for the V250PA40C based on the following factors:

Electrical Compatibility: Both components maintain the same nominal varistor voltage of 390 V with overlapping voltage tolerance ranges. The ERZ-C20EK391 provides superior surge current handling (8 kA versus 6.5 kA), offering enhanced protection margin in transient suppression applications.

Mechanical Compatibility: Both parts are single-circuit, chassis-mount devices. The ERZ-C20EK391 uses a module package configuration compared to the base mount of the V250PA40C; however, both are suitable for chassis-level mounting applications.

Product Status and Compliance: The V250PA40C is obsolete, whereas the ERZ-C20EK391 maintains active production status. The Panasonic part achieves ROHS3 compliance, addressing regulatory requirements for new designs and procurement cycles.

Operating Temperature: The V250PA40C supports -55°C to 85°C operation. The ERZ-C20EK391 operates across -40°C to 85°C. Applications requiring operation below -40°C require evaluation of alternative solutions.

Frequently Asked Questions (FAQ)

Q: Can the ERZ-C20EK391 directly replace the V250PA40C in existing assemblies?

A: The ERZ-C20EK391 provides electrical equivalence through matching nominal varistor voltage (390 V), surge current capacity (8 kA exceeds 6.5 kA requirement), and energy absorption (130 J). Physical mounting differences between base mount and module packages require mechanical integration assessment for specific applications.

Q: What are the key electrical parameters that define substitution eligibility?

A: Substitution is determined by varistor voltage rating (nominal 390 V), maximum AC/DC voltage support (250 V AC, 320 V DC minimum), surge current capacity (minimum 6.5 kA), energy absorption (130 J), and single-circuit configuration. The ERZ-C20EK391 satisfies all criteria.

Q: Does the ERZ-C20EK391 meet modern regulatory requirements?

A: Yes. The ERZ-C20EK391 is ROHS3 compliant and maintains active production status. The V250PA40C is non-compliant and obsolete, making the Panasonic part suitable for new designs and procurement requiring current regulatory alignment.

Q: Are there temperature range limitations when substituting?

A: The V250PA40C operates from -55°C to 85°C. The ERZ-C20EK391 operates from -40°C to 85°C. Applications requiring operation below -40°C cannot use the ERZ-C20EK391 as a substitute.

Q: How do the package configurations differ?

A: The V250PA40C uses a base mount package, while the ERZ-C20EK391 uses a module package. Both are chassis-mount configurations. Physical layout and mounting interface differences require evaluation for specific PCB or chassis designs.