P0900SC Equivalent & Substitute Parts

Part Overview

The P0900SC is a 75V off-state, 400A peak pulse TVS thyristor manufactured by Littelfuse Inc. in the DO-214AA (SMB) surface mount package. This component is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. The part operates within the SIDACtor® series and provides transient voltage suppression for circuit protection applications.

Substiute Parts

P0900SC

Littelfuse Inc.In Stock: 30412P0900SC Datasheet

Current PartRFQ

P0900SCLRP

LittelfuseIn Stock: 3925P0900SCLRP Datasheet

DirectRFQ

SMP100LC-90

STMicroelectronicsIn Stock: 1946SMP100LC-90 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the P0900SC TVS thyristor is determined by the following critical parameters:

Primary Substitution Criteria:

• Off-state voltage rating (75V nominal)
• Peak pulse current capability (400A at 8/20µs)
• Package compatibility (DO-214AA, SMB surface mount)
• Hold current (150mA)
• Single element configuration

Substitute Categories:

Direct Equivalent: P0900SCLRP maintains identical electrical specifications to the P0900SC. The only difference is packaging format (Tape & Reel versus bulk), making this a direct functional replacement with no circuit redesign required.

Manufacturer-Recommended Alternative: SMP100LC-90 (STMicroelectronics) operates at a higher off-state voltage (90V) and breakover voltage (125V) while maintaining the same 400A peak pulse current and 150mA hold current. This part is suitable for applications where the higher voltage rating provides additional margin or where circuit protection thresholds can accommodate the increased voltage specification.

Parameter Comparison

Engineering Selection Recommendations

P0900SCLRP is the preferred direct substitute for P0900SC applications. This part is electrically identical and maintains all original specifications while offering active product status and ROHS3 compliance. The only distinction is packaging format (Tape & Reel), which does not affect circuit performance.

SMP100LC-90 serves as an alternative for applications where higher voltage ratings are acceptable. The 90V off-state and 125V breakover voltages provide increased transient suppression margin compared to the original 75V specification. The reduced capacitance (80pF versus 140pF) may affect high-frequency circuit behavior and should be evaluated for specific application requirements. Both substitute parts maintain ROHS3 compliance and active product status.

Frequently Asked Questions (FAQ)

Q: Can P0900SCLRP be used as a direct replacement for P0900SC?

A: Yes. P0900SCLRP is electrically and functionally identical to P0900SC. The difference is packaging format only (Tape & Reel versus bulk). No circuit modifications are required.

Q: What is the primary difference between P0900SC and SMP100LC-90?

A: The SMP100LC-90 operates at higher voltage ratings (90V off-state, 125V breakover) compared to P0900SC (75V off-state, 98V breakover). Both maintain 400A peak pulse current and 150mA hold current. The SMP100LC-90 also has lower capacitance (80pF versus 140pF).

Q: Is SMP100LC-90 a direct replacement for P0900SC?

A: SMP100LC-90 is a functional alternative, not a direct replacement. The higher voltage rating makes it suitable for applications where increased transient suppression margin is beneficial or where circuit thresholds permit higher voltage operation. Circuit validation is necessary to confirm compatibility.

Q: Are all substitute parts RoHS compliant?

A: P0900SCLRP and SMP100LC-90 are both ROHS3 compliant. The original P0900SC is RoHS non-compliant.

Q: Do all parts use the same package?

A: Yes. P0900SC, P0900SCLRP, and SMP100LC-90 all use DO-214AA (SMB) surface mount packaging, ensuring mechanical and footprint compatibility.

Q: What is the significance of the capacitance difference between P0900SC and SMP100LC-90?

A: P0900SC has 140pF capacitance while SMP100LC-90 has 80pF. In high-frequency applications, lower capacitance may reduce parasitic effects. Applications sensitive to capacitive loading should evaluate this parameter.