MMDT4124-7-F Equivalent & Substitute Parts

Part Overview

The MMDT4124-7-F is a dual NPN bipolar junction transistor array manufactured by Diodes Incorporated in a surface mount SOT-363 package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part delivers 200mA collector current, 25V collector-emitter breakdown voltage, and 300MHz transition frequency in a compact 6-pin surface mount configuration.

Substiute Parts

MMDT4124-7-F

Diodes IncorporatedIn Stock: 6409MMDT4124-7-F Datasheet

Current PartRFQ

MMDT3904-7-F

Diodes IncorporatedIn Stock: 85389MMDT3904-7-F Datasheet

MFR RecommendedRFQ

BC848CDW1T1G

onsemiIn Stock: 56991BC848CDW1T1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMDT4124-7-F is determined by compatibility across the following critical parameters:

Package Compatibility: All substitute parts must use the SOT-363 surface mount package (6-TSSOP, SC-88) to ensure mechanical and electrical fit on existing PCB layouts.

Transistor Configuration: All substitutes must be dual NPN transistor arrays to maintain functional equivalence.

Electrical Ratings: Substitute parts must meet or exceed the collector current (200mA), collector-emitter breakdown voltage (25V), and power dissipation (200mW) requirements of the original part.

Environmental Compliance: All substitutes must maintain ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status to satisfy regulatory and supply chain requirements.

Frequency Performance: Transition frequency of 300MHz or higher ensures compatibility with high-speed switching applications.

The MMDT3904-7-F and BC848CDW1T1G meet these substitution criteria with variations in specific electrical parameters that remain within acceptable operating ranges for dual NPN transistor array applications.

Parameter Comparison

Engineering Selection Recommendations

MMDT3904-7-F (Diodes Incorporated): This substitute is the primary equivalent for the MMDT4124-7-F. Both parts are manufactured by Diodes Incorporated and share identical package, power rating, and transition frequency specifications. The MMDT3904-7-F is in active production status with significantly higher inventory availability (85,300 units). The collector-emitter breakdown voltage is rated at 40V, exceeding the original 25V specification, providing additional design margin. The DC current gain minimum is 100 at 10mA, compared to 120 at 2mA in the original part. This substitute maintains full ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. The part is available in Cut Tape and Digi-Reel packaging options.

BC848CDW1T1G (onsemi): This substitute provides an alternative from a different manufacturer with active product status. The BC848CDW1T1G shares the SOT-363 package and dual NPN configuration. Key differences include a reduced maximum collector current of 100mA (versus 200mA), a lower transition frequency of 100MHz (versus 300MHz), and higher Vce saturation at 600mV. The power dissipation rating is higher at 380mW. This substitute is suitable for applications where the reduced current and frequency specifications are acceptable. The part maintains full ROHS3 compliance, MSL Level 1 rating, and REACH unaffected status. Inventory availability is 56,930 units in Tape & Reel packaging.

Selection Criteria: For direct replacement in existing designs, MMDT3904-7-F is the recommended substitute due to manufacturer continuity and superior electrical performance. BC848CDW1T1G is suitable for new designs where lower current and frequency requirements are acceptable and where onsemi component qualification is preferred.

Frequently Asked Questions (FAQ)

Q: Can the MMDT3904-7-F directly replace the MMDT4124-7-F on existing PCBs?

A: Yes. Both parts use the SOT-363 package with identical pinout and footprint. The MMDT3904-7-F is electrically compatible for applications operating within its specified parameters. The higher collector-emitter breakdown voltage (40V versus 25V) provides additional design margin.

Q: What are the key differences between MMDT3904-7-F and BC848CDW1T1G?

A: The MMDT3904-7-F maintains the 200mA collector current and 300MHz transition frequency of the original part. The BC848CDW1T1G has reduced maximum collector current (100mA) and transition frequency (100MHz), with higher Vce saturation (600mV). Both share the SOT-363 package and dual NPN configuration.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. Both MMDT3904-7-F and BC848CDW1T1G are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating and REACH unaffected status, matching the original part's regulatory compliance.

Q: Which substitute should be selected for high-frequency switching applications?

A: The MMDT3904-7-F is the appropriate choice for high-frequency applications, maintaining the 300MHz transition frequency of the original MMDT4124-7-F. The BC848CDW1T1G, with 100MHz transition frequency, is limited to lower-frequency applications.

Q: What is the inventory status of substitute parts?

A: MMDT3904-7-F has 85,300 units in stock. BC848CDW1T1G has 56,930 units in stock. Both substitutes are in active production with established supply chains.

Q: Can BC848CDW1T1G be used in applications requiring 200mA collector current?

A: No. The BC848CDW1T1G is rated for a maximum collector current of 100mA. Applications requiring 200mA operation must use MMDT3904-7-F or the original MMDT4124-7-F if available.

Q: Are there packaging format differences between substitutes?

A: MMDT3904-7-F is available in Cut Tape (CT) and Digi-Reel packaging. BC848CDW1T1G is available in Tape & Reel (TR) format. Both use the SOT-363 package. Packaging selection depends on production volume and assembly requirements.