P1100SB Equivalent & Substitute Parts

Part Overview

The P1100SB is a Transient Voltage Suppressor (TVS) thyristor manufactured by Littelfuse Inc., designed for overvoltage protection in surface-mount applications. This component features a 90V off-state voltage rating with 250A peak pulse current capability in a DO-214AA (SMB) package. The P1100SB is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and procurement.

Substiute Parts

P1100SB

Littelfuse Inc.In Stock: 30202P1100SB Datasheet

Current PartRFQ

P1100SBLRP

Littelfuse Inc.In Stock: 52858P1100SBLRP Datasheet

DirectRFQ

SMP100LC-140

STMicroelectronicsIn Stock: 4249SMP100LC-140 Datasheet

MFR RecommendedRFQ

SMP100LC-90

STMicroelectronicsIn Stock: 1946SMP100LC-90 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P1100SB is determined by the following critical parameters:

• Voltage - Off State: 90V (primary voltage rating)
• Voltage - Breakover: 130V nominal
• Current - Peak Pulse (8/20µs): 250A minimum
• Package / Case: DO-214AA, SMB (mechanical compatibility)
• Mounting Type: Surface Mount
• Number of Elements: 1

Substitute parts must maintain the same off-state voltage (90V) and support equivalent or higher peak pulse current ratings to ensure functional compatibility. Package and mounting type must remain identical for PCB integration without redesign.

Parameter Comparison

Engineering Selection Recommendations

P1100SBLRP (Littelfuse Inc.) is the direct equivalent substitute for the P1100SB. This part maintains identical electrical specifications (90V off-state, 130V breakover, 250A peak pulse current) and mechanical compatibility. The primary advantage is active product status with ROHS3 compliance, addressing the obsolescence of the original P1100SB. Packaging is available in Tape & Reel (TR) format with 52,800 units in stock.

SMP100LC-90 (STMicroelectronics) provides a cross-manufacturer alternative with the same 90V off-state voltage rating. This part delivers higher peak pulse current (400A vs. 250A), providing enhanced transient protection margin. ROHS3 compliance and active status support long-term availability. Packaging is Tape & Reel (TR) format.

SMP100LC-140 (STMicroelectronics) is suitable only for applications where a higher voltage rating (140V off-state) is acceptable. This part is not a direct substitute due to elevated voltage specifications and should be selected only when circuit design permits higher voltage operation.

Frequently Asked Questions (FAQ)

Q: Can P1100SBLRP directly replace P1100SB without circuit modification?

A: Yes. P1100SBLRP maintains identical electrical parameters (90V off-state, 130V breakover, 250A peak pulse current, 150mA hold current) and the same DO-214AA SMB package. No circuit redesign is required.

Q: Is SMP100LC-90 compatible with P1100SB applications?

A: SMP100LC-90 is mechanically and functionally compatible. It provides the same 90V off-state voltage and 150mA hold current. The higher peak pulse current rating (400A vs. 250A) offers additional transient protection margin. Verify that the increased capacitance (80pF vs. 50pF) does not affect circuit timing or signal integrity in your specific application.

Q: Why is SMP100LC-140 listed if it has a different voltage rating?

A: SMP100LC-140 is included as a reference point for higher-voltage applications. The 140V off-state rating makes it unsuitable as a direct substitute for 90V-rated circuits. Use this part only if your circuit design permits operation at elevated voltage levels.

Q: What is the impact of capacitance differences between substitute parts?

A: Capacitance values range from 50pF (P1100SB) to 80pF (SMP100LC-90). In high-frequency or signal-sensitive circuits, verify that the increased capacitance does not introduce unacceptable signal attenuation or timing shifts. For standard overvoltage protection applications, these differences are typically negligible.

Q: Are all substitute parts RoHS compliant?

A: P1100SBLRP, SMP100LC-90, and SMP100LC-140 are all ROHS3 compliant. The original P1100SB is RoHS non-compliant. If RoHS compliance is a procurement requirement, select from the active substitute parts.

Q: What packaging options are available for these substitutes?

A: P1100SBLRP is available in Tape & Reel (TR) format. SMP100LC-90 is available in Tape & Reel (TR) format. SMP100LC-140 is available in Cut Tape (CT) and Digi-Reel® formats. Verify packaging compatibility with your assembly process requirements.