LVR008NK Equivalent & Substitute Parts

Part Overview

The LVR008NK is a polymeric PTC resettable fuse manufactured by Littelfuse Inc. in the PolySwitch® LVR series. This component provides overcurrent protection at 240V (265V internal rating) with an 80 mA hold current and 190 mA trip current. The part is actively produced and widely stocked, with 1076 units available in inventory. PTC resettable fuses are essential for circuit protection applications where automatic recovery after fault conditions is required, eliminating the need for manual fuse replacement.

Substiute Parts

LVR008NK

Littelfuse Inc.In Stock: 1176LVR008NK Datasheet

Current PartRFQ

LVR008NS

Littelfuse Inc.In Stock: 16646LVR008NS Datasheet

DirectRFQ

LVR008NS-1

Littelfuse Inc.In Stock: 2242LVR008NS-1 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the LVR008NK is determined by strict equivalence across all critical electrical and mechanical parameters. The allowed substitution criteria are:

• Voltage rating: 240V (265V internal) - exact match required
• Current hold (Ih): 80 mA - exact match required
• Current trip (It): 190 mA - exact match required
• Mounting type: Through Hole - exact match required
• Package type: Radial, Disc - exact match required
• Lead spacing: 0.200" (5.08mm) - exact match required
• Approval agencies: CQC, CSA, TUV, UL - all certifications maintained
• RoHS compliance: ROHS3 Compliant - maintained across all substitutes

The LVR008NK has two direct equivalents: LVR008NS and LVR008NS-1. Both parts share identical electrical specifications and certifications. The only variation is in the seated height dimension, which does not affect electrical performance or circuit board compatibility for standard through-hole applications.

Parameter Comparison

Engineering Selection Recommendations

All three parts—LVR008NK, LVR008NS, and LVR008NS-1—are functionally equivalent for overcurrent protection applications requiring 240V, 80 mA hold current specifications. Each part maintains active product status and carries identical regulatory certifications (CQC, CSA, TUV, UL) with ROHS3 compliance.

The primary distinction between these parts is seated height. The LVR008NK has a maximum seated height of 0.488" (12.40mm), while both LVR008NS and LVR008NS-1 have a maximum seated height of 0.402" (10.20mm). This difference may be relevant for applications with height constraints on the circuit board or enclosure. For standard through-hole applications without specific height limitations, all three parts are interchangeable.

Inventory availability varies: LVR008NS offers the highest stock level at 16600 units, followed by LVR008NS-1 at 2195 units, and LVR008NK at 1076 units. Selection may be influenced by supply chain requirements and lead time considerations.

Frequently Asked Questions (FAQ)

Q: Can LVR008NS or LVR008NS-1 be used as direct replacements for LVR008NK?

A: Yes. All three parts share identical electrical specifications, including voltage rating (240V/265V internal), hold current (80 mA), trip current (190 mA), and operating temperature range (-20°C to 85°C). They carry the same regulatory certifications and RoHS compliance status. The only difference is seated height, which does not affect electrical performance.

Q: What is the significance of the seated height difference?

A: The LVR008NK has a seated height of 0.488" (12.40mm), while LVR008NS and LVR008NS-1 are 0.402" (10.20mm). This difference is mechanical only and does not impact circuit function. Selection depends on available space in the application. For most standard through-hole designs, either height is acceptable.

Q: Are all three parts certified for the same applications?

A: Yes. All three parts hold identical approvals from CQC, CSA, TUV, and UL, and all are ROHS3 compliant. They are suitable for the same regulatory environments and application categories.

Q: What is the difference between LVR008NS and LVR008NS-1?

A: Electrically and mechanically, LVR008NS and LVR008NS-1 are identical. Both have the same voltage rating, current specifications, seated height (0.402"), and certifications. The difference is in part numbering convention only.

Q: Which part should I select based on availability?

A: LVR008NS has the highest inventory level (16600 units), making it the preferred choice for applications requiring immediate availability or large-volume orders. LVR008NS-1 (2195 units) and LVR008NK (1076 units) are suitable for smaller quantities or when specific part number requirements exist.

Q: Are the initial and post-trip resistance values identical across all three parts?

A: Yes. All three parts have an initial resistance (Ri) minimum of 7.4 Ohms and post-trip resistance (R1) maximum of 26 Ohms. These values are critical for circuit design and are held constant across all substitutes.