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Alternatives to Diodes Incorporated CTA2N1P-7-F

Diodes Incorporated CTA2N1P-7-F and its qualified second sources, compared on form, fit and function, stock, lifecycle and price — the same checks Parter runs inside a BOM.

Equivalent and substitute parts for Diodes Incorporated CTA2N1P-7-F

CTA2N1P-7-F compared against its qualified second sources
CTA2N1P-7-FDiodes IncorporatedMMDT3946-7-FDiodes IncorporatedMMBT4401-7-FDiodes Incorporated+1more
FFF CompatibilityPinout assignments differ entirely from the original CTA2N1P and require trace rerouting.Uses the identical SOT-363 footprint and package dimensions.Replaces the P-channel MOSFET with a PNP BJT, changing the drive mechanism from voltage-controlled to current-controlled.Different package (SOT-23 vs. SOT-363) and pinout configuration.Single-transistor SOT-23 package instead of a dual-transistor SOT-363 package.Identical NPN transistor electrical ratings and performance to the original CTA2N1P Q1 element.
AI Summary

CTA2N1P-7-F by Diodes Incorporated: Transistor General Purpose NPN, P-Channel 40V NPN, 50V P-Channel 600mA NPN, 130mA P-Channel Surface Mount SOT-363.

This complementary NPN and PNP transistor array occupies the identical SOT-363 footprint. However, it replaces the original P-channel MOSFET with a PNP BJT, which changes the circuit behavior from voltage-driven to current-driven and has a completely different pinout configuration.

  • Maintains the space-saving 6-pin SOT-363 package form factor
  • Active lifecycle status with excellent second-sourcing options
  • Provides a dual BJT solution (NPN + PNP) which matches the current-drive nature of the original NPN
  • PNP BJT replaces the P-channel MOSFET, necessitating base resistors and higher drive currents.
  • Lower collector current limit on the NPN element (200mA vs. 600mA for the original MMBT4401 element).

This is the exact discrete NPN transistor element used inside the CTA2N1P array. Recommending a split-component approach with MMBT4401 and BSS84 is the most robust and future-proof design strategy when transitioning away from this obsolete co-packaged device.

  • Exact electrical equivalent of the original NPN BJT element (Q1)
  • Industry standard, highly available, long-term active lifecycle
  • Excellent electrical performance (600mA current rating, identical to CTA2N1P's Q1)
  • Requires separate footprint and PCB layout redesign to host two discrete SOT-23 packages.
Lifecycle StatusObsoleteActiveActive
Market AvailabilityNon-stockIn stockIn stock
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