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V275LS40B Equivalent & Substitute Parts
Part Overview
The V275LS40B is a 421 V, 6.5 kA disc varistor manufactured by Littelfuse Inc., designed for transient voltage suppression in through-hole applications. This component operates across a temperature range of -55°C to 85°C and is compliant with RoHS3 standards. The V275LS40B carries an obsolete product status, making identification of functionally equivalent alternatives necessary for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Littelfuse Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Maximum AC Volts | 275 V |
| Maximum DC Volts | 369 V |
| Varistor Voltage (Typ) | 421 V |
| Current - Surge | 6.5 kA |
| Energy | 140 J |
| Number of Circuits | 1 |
| Capacitance @ 1 MHz | 900 pF |
| Operating Temperature | -55°C to 85°C |
| Mounting Type | Through Hole |
| Package / Case | Disc 20mm |
| RoHS Status | RoHS3 Compliant |
| MSL Rating | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the V275LS40B is determined by strict equivalence across the following critical parameters:
- Maximum AC Volts: 275 V
- Maximum DC Volts: 369 V
- Varistor Voltage (Typ): 421 V
- Current - Surge: 6.5 kA
- Energy: 140 J
- Number of Circuits: 1
- Operating Temperature: -55°C to 85°C
- Mounting Type: Through Hole
- Package / Case: Disc 20mm
- RoHS Status: RoHS3 Compliant
All substitute parts listed maintain identical electrical and mechanical specifications. Variations exist only in series designation (LS, LT, LU), packaging format (Tape & Reel or Cut Tape), and quantity per reel, which do not affect functional performance or circuit compatibility.
Parameter Comparison
| Part Number | Series | Packaging | Product Status | Max AC (V) | Max DC (V) | Varistor Voltage Typ (V) | Surge Current (kA) | Energy (J) | Operating Temp (°C) | Inventory (Pcs) |
|---|---|---|---|---|---|---|---|---|---|---|
| V275LS40B | LS | Tape & Reel | Obsolete | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 873 |
| V275LS40BP | LS | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 857 |
| V275LS40BPX10 | LS | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 781 |
| V275LS40BPX2855 | LS | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 887 |
| V275LT40BP | LT | Cut Tape | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 2578 |
| V275LT40BPX10 | LT | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 853 |
| V275LT40BPX2855 | LT | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 680 |
| V275LU40BP | LU | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 841 |
| V275LU40BPX10 | LU | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 909 |
| V275LU40BPX2855 | LU | Tape & Reel | Active | 275 | 369 | 421 | 6.5 | 140 | -55 to 85 | 748 |
Engineering Selection Recommendations
All listed substitute parts are functionally equivalent to the V275LS40B and carry Active product status, ensuring long-term availability and supply chain stability. Selection among these alternatives should be based on procurement requirements:
For Tape & Reel packaging with LS series continuity: V275LS40BP, V275LS40BPX10, or V275LS40BPX2855 provide direct series alignment with the obsolete V275LS40B.
For Cut Tape packaging: V275LT40BP offers the highest inventory level (2578 pcs) and is suitable for lower-volume or manual assembly operations.
For alternative series with Tape & Reel packaging: V275LT40BPX10, V275LT40BPX2855, V275LU40BP, V275LU40BPX10, and V275LU40BPX2855 maintain identical electrical performance across LT and LU series designations.
All substitute parts comply with RoHS3 standards and carry MSL Rating 1 (Unlimited), matching the compliance profile of the original component.
Frequently Asked Questions (FAQ)
Q: Can V275LT40BP be used as a direct replacement for V275LS40B?
A: Yes. V275LT40BP is electrically and mechanically equivalent. The primary difference is packaging format: V275LT40BP is supplied in Cut Tape (CT) format, while V275LS40B is Tape & Reel (TR). Both are through-hole disc 20mm packages with identical electrical specifications.
Q: What is the difference between V275LS40BPX10 and V275LS40BPX2855?
A: Both parts are electrically identical. The suffix designations indicate different reel quantities or manufacturing lot codes. Electrical performance, temperature range, and surge current ratings are unchanged.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry RoHS3 Compliant status and MSL Rating 1 (Unlimited), matching the compliance requirements of the V275LS40B.
Q: Can I mix different series (LS, LT, LU) in the same circuit?
A: Yes. All series variants maintain identical electrical parameters: 275 V maximum AC, 369 V maximum DC, 421 V typical varistor voltage, and 6.5 kA surge current. Series designation does not affect functional performance.
Q: Which substitute part has the best availability?
A: V275LT40BP carries the highest inventory level at 2578 pcs. For Tape & Reel packaging, V275LU40BPX10 offers 909 pcs.
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