NP3500SCMCT3G Equivalent & Substitute Parts

Part Overview

The NP3500SCMCT3G is a 320V off-state, 400A peak pulse TVS thyristor manufactured by onsemi in DO-214AA (SMB) surface mount packaging. This component is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements. The part functions as a transient voltage suppressor for overvoltage protection in electronic circuits.

Substiute Parts

NP3500SCMCT3G

onsemiIn Stock: 769NP3500SCMCT3G Datasheet

Current PartRFQ

P3500SCLRP

Littelfuse Inc.In Stock: 55207P3500SCLRP Datasheet

DirectRFQ

TB3500M-13-F

Diodes IncorporatedIn Stock: 9204TB3500M-13-F Datasheet

DirectRFQ

P3500SCMCLRP

Littelfuse Inc.In Stock: 2242P3500SCMCLRP Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for TVS thyristors is determined by matching critical electrical parameters: breakover voltage, off-state voltage, peak pulse current ratings, and hold current. All identified substitutes maintain the 400V breakover and 320V off-state voltage specifications. The 150 mA hold current is consistent across all parts. Package compatibility (DO-214AA, SMB) is maintained for direct board-level replacement.

Two substitution categories are identified:

Direct Equivalents maintain all primary electrical specifications including the 400A peak pulse current (8/20µs) rating. These parts are functionally interchangeable at the circuit level.

Compatible Alternative provides reduced peak pulse current capability (250A vs 400A at 8/20µs) while maintaining voltage specifications and hold current. This part is suitable for applications with lower transient current requirements.

Parameter Comparison

Engineering Selection Recommendations

P3500SCLRP (Littelfuse Inc.) is the primary direct equivalent. This part maintains identical electrical specifications to the NP3500SCMCT3G, including 400A peak pulse current (8/20µs) and 100A peak pulse current (10/1000µs). The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating. Capacitance is specified at 65pF versus 33pF in the original part; this variance is within acceptable tolerance for TVS thyristor applications.

P3500SCMCLRP (Littelfuse Inc.) provides direct electrical equivalence with identical peak pulse current ratings (400A at 8/20µs, 100A at 10/1000µs). This part is active in production with ROHS3 compliance. On-state voltage is specified at 5V versus 4V in the original part. Capacitance is 40pF. This part is suitable where the slightly higher on-state voltage is acceptable.

TB3500M-13-F (Diodes Incorporated) is a compatible alternative for applications with reduced transient current requirements. Peak pulse current is rated at 250A (8/20µs) and 50A (10/1000µs), representing a 37.5% reduction from the original specification. This part maintains voltage specifications and hold current. On-state voltage is 4.6V. This part is active in production with ROHS3 compliance and is suitable only where circuit design permits the lower current rating.

All substitute parts maintain DO-214AA (SMB) packaging for direct board-level replacement without layout modification.

Frequently Asked Questions (FAQ)

Q: Can P3500SCLRP replace NP3500SCMCT3G in all applications?

A: Yes, for applications where the original NP3500SCMCT3G specifications are required. P3500SCLRP maintains identical breakover voltage (400V), off-state voltage (320V), peak pulse current ratings (400A at 8/20µs, 100A at 10/1000µs), and hold current (150mA). The capacitance difference (65pF vs 33pF) does not affect substitution eligibility for standard TVS thyristor applications.

Q: What is the difference between P3500SCLRP and P3500SCMCLRP?

A: Both parts are manufactured by Littelfuse and maintain identical electrical specifications for voltage and current ratings. The primary differences are packaging format (P3500SCLRP is supplied in Cut Tape & Digi-Reel; P3500SCMCLRP is supplied in Tape & Reel) and on-state voltage (4V vs 5V). Both are suitable direct equivalents.

Q: Can TB3500M-13-F be used as a direct replacement?

A: TB3500M-13-F is a compatible alternative only for applications where peak pulse current requirements do not exceed 250A (8/20µs). The original NP3500SCMCT3G is rated for 400A peak pulse current. TB3500M-13-F is not suitable for applications requiring the full 400A specification.

Q: Are all substitute parts RoHS compliant?

A: Yes. P3500SCLRP, TB3500M-13-F, and P3500SCMCLRP are all ROHS3 compliant. The original NP3500SCMCT3G RoHS status is not specified in available documentation.

Q: Do the substitute parts require PCB layout changes?

A: No. All substitute parts use DO-214AA (SMB) packaging, identical to the original NP3500SCMCT3G. Direct board-level replacement is possible without layout modification.

Q: What is the moisture sensitivity level for substitute parts?

A: All substitute parts (P3500SCLRP, TB3500M-13-F, P3500SCMCLRP) have Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements.