NP3500SCG Equivalent & Substitute Parts

Part Overview

The NP3500SCG is a 320V off-state thyristor-based transient voltage suppressor (TVS) in DO-214AA surface mount packaging, rated for 100A peak pulse current (10/1000µs). Manufactured by onsemi, this component is classified as obsolete. Due to its discontinued status, identifying functionally equivalent active alternatives is essential for design continuity and procurement reliability.

Substiute Parts

NP3500SCG

onsemiIn Stock: 774NP3500SCG Datasheet

Current PartRFQ

P3500SCLRP

Littelfuse Inc.In Stock: 55207P3500SCLRP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

The P3500SCLRP by Littelfuse Inc. qualifies as a direct substitute based on the following critical parameters:

• Voltage - Breakover: 400V (identical)
• Voltage - Off State: 320V (identical)
• Voltage - On State: 4V (identical)
• Current - Hold (Ih): 150mA (identical)
• Number of Elements: 1 (identical)
• Package / Case: DO-214AA, SMB (identical)
• Mounting Type: Surface Mount (identical)

The P3500SCLRP maintains electrical equivalence across all primary voltage and hold current specifications. The substitute part is currently active in production with significantly higher inventory availability (55,100 pcs vs. 677 pcs for the obsolete NP3500SCG).

Parameter Comparison

Engineering Selection Recommendations

The P3500SCLRP is the direct equivalent for NP3500SCG replacement. Selection is based on:

• Identical electrical specifications across all critical voltage and current parameters
• Identical mechanical packaging (DO-214AA, SMB) enabling direct PCB footprint compatibility
• Active product status ensuring long-term availability and supply chain reliability
• ROHS3 compliance of the substitute part supports modern manufacturing and environmental standards
• Both parts maintain REACH Unaffected status and unlimited moisture sensitivity rating

The obsolete status of the NP3500SCG necessitates transition to the P3500SCLRP for new designs and ongoing production support.

Frequently Asked Questions (FAQ)

Q: Can the P3500SCLRP be used as a direct replacement for NP3500SCG in existing designs?

A: Yes. The P3500SCLRP matches all critical electrical parameters (breakover voltage, off-state voltage, on-state voltage, and hold current) and uses identical DO-214AA, SMB packaging. No PCB layout modifications are required.

Q: What is the difference in capacitance between the two parts?

A: The NP3500SCG has 71pF capacitance while the P3500SCLRP has 65pF. Both values fall within the acceptable range for TVS thyristor applications in this voltage class and do not affect functional substitution.

Q: Why is the NP3500SCG classified as obsolete?

A: The NP3500SCG is no longer manufactured by onsemi. The P3500SCLRP by Littelfuse Inc. is the active equivalent in the market.

Q: Are there any compliance differences between the two parts?

A: The P3500SCLRP carries ROHS3 compliance certification. Both parts maintain REACH Unaffected status and identical moisture sensitivity levels (MSL 1, Unlimited).

Q: What is the inventory situation for each part?

A: The NP3500SCG has 677 pcs available (obsolete stock). The P3500SCLRP has 55,100 pcs in stock with active production status, providing superior long-term availability.