MMPQ3904 BK

Overview

The Central Semiconductor Corp MMPQ3904 BK is a surface-mount NPN silicon quad transistor housed in a SO-16 (Case 751B-05) plastic package. It integrates four independent single-element bipolar junction transistors within a single component. The device supports a maximum collector current of 0.2 A per element and withstands a collector-emitter breakdown voltage of 40 V. Key electrical specifications include a minimum DC current gain (hFE) of 75, a collector-base voltage rating of 60 V, and an emitter-base voltage limit of 6 V. The unit features a power dissipation capacity of 1.2 W and operates across a temperature range from -65°C to +150°C.

Feature Summary

• Integrates four independent NPN switching elements into a compact multi-chip module for space-constrained designs.
• Utilizes a lead-free (BK suffix) plastic epoxy construction compliant with environmental standards.
• Provides high thermal stability with a maximum junction operating temperature of 150°C.

Applications

• General purpose signal amplification circuits requiring multiple identical NPN stages.
• Digital logic interface and switching applications for low-power control signals.
• Multi-channel driver circuits where component count reduction is prioritized.

Procurement Notes

Verify the specific manufacturer datasheet for the MMPQ3904 BK variant, as Central Semiconductor product lines may undergo revisions. Confirm that the SO-16 package dimensions and pinout align with the target PCB footprint. Ensure compliance with RoHS directives if required by the end application. Cross-reference the hFE binning requirements against circuit design margins to guarantee adequate gain performance.

Selection Notes

Select this component when a design requires four matched or similar NPN transistors in a single surface-mount package. The 0.2 A current rating suits low-to-medium power switching tasks. Consider the SO-16 form factor for assembly density. Verify that the 40 V VCEO rating exceeds the maximum circuit voltage peaks. Compare thermal resistance values against available board space for heat dissipation.

Part Context

This part belongs to the general-purpose small-signal transistor family, specifically designed as a quad configuration. It serves as a consolidated alternative to using four discrete SOT-23 or TO-92 transistors. The integration simplifies layout routing and reduces soldering points. Similar multi-transistor packages exist from other manufacturers, offering comparable electrical characteristics for system miniaturization.

Replacement Considerations

Direct replacements include the MMPQ3904 from Fairchild/ON Semiconductor or the MMBQ3904 series. Verify pin compatibility and package tolerance differences between the Case 751B-05 and competing SO-16 variants. Ensure substitute parts maintain the 0.2 A current and 40 V voltage ratings.