MMDT3946-TP Equivalent & Substitute Parts

Part Overview

The MMDT3946-TP is an active Bipolar (BJT) Transistor Array manufactured by Micro Commercial Co, designed for interface applications requiring dual transistor functionality in a compact surface mount package. This part integrates transistor switching and amplification capabilities in a 6-pin SOT-363 package with a maximum collector current of 200mA, collector-emitter breakdown voltage of 40V, and power dissipation of 200mW. The part is classified as Active product status with REACH Unaffected compliance. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity when the primary part becomes unavailable or when alternative packaging formats are required.

Substiute Parts

MMDT3946-TP

Micro Commercial CoIn Stock: 836MMDT3946-TP Datasheet

Current PartRFQ

MMDT3946-7-F

Diodes IncorporatedIn Stock: 29681MMDT3946-7-F Datasheet

UpgradeRFQ

MBT3946DW1T2G

onsemiIn Stock: 26204MBT3946DW1T2G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMDT3946-TP is determined by strict equivalence across the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Maximum collector current: 200mA
• Collector-emitter breakdown voltage: 40V
• DC current gain (hFE): minimum 100 @ 10mA, 1V
• Vce saturation: 300mV @ 5mA, 50mA (NPN element)
• Transition frequency: 300MHz and 250MHz
• Operating temperature range: -55°C to 150°C

Mechanical Equivalence Criteria:

• Surface mount technology
• Package designation: SOT-363 (6-pin configuration)
• Pin-to-pin compatibility with 6-TSSOP and SC-88 variants

Substitute Parts Identified:

1. MMDT3946-7-F (Diodes Incorporated): Upgrade substitute with identical electrical specifications, enhanced packaging format (Cut Tape & Digi-Reel), RoHS3 compliance, and MSL Level 1 rating.

2. MBT3946DW1T2G (onsemi): Similar substitute with equivalent electrical parameters, Tape & Reel packaging, RoHS3 compliance, and MSL Level 1 rating. Power dissipation specification is 150mW (lower than primary part).

Parameter Comparison

Engineering Selection Recommendations

MMDT3946-7-F (Diodes Incorporated) is the primary upgrade substitute. This part maintains full electrical equivalence with the MMDT3946-TP across all specified parameters, including maximum power dissipation of 200mW. The part carries Active product status, REACH Unaffected compliance, and RoHS3 certification. The Cut Tape & Digi-Reel packaging format provides enhanced supply chain flexibility compared to bulk packaging. Moisture Sensitivity Level 1 (Unlimited) indicates no moisture bake-out requirement prior to assembly.

MBT3946DW1T2G (onsemi) is a similar substitute suitable for applications where the 150mW power dissipation specification is acceptable. This part meets all other electrical requirements and carries identical compliance certifications (REACH Unaffected, RoHS3). The Tape & Reel packaging format supports automated assembly processes. The SC-88/SC70-6/SOT-363 package designation confirms pin-compatible footprint compatibility.

Selection between substitute parts should be based on packaging format requirements, supply availability, and thermal design margins specific to the application. Both substitutes maintain Active product status and full regulatory compliance.

Frequently Asked Questions (FAQ)

Q: Can MMDT3946-7-F directly replace MMDT3946-TP in existing designs?

A: Yes. MMDT3946-7-F maintains electrical equivalence across all specified parameters including collector current (200mA), breakdown voltage (40V), saturation voltage (300mV @ 5mA, 50mA), current gain (100 @ 10mA, 1V), and transition frequency (300MHz, 250MHz). The SOT-363 package provides identical pin configuration and footprint compatibility.

Q: What is the difference in power dissipation between MMDT3946-TP and MBT3946DW1T2G?

A: MMDT3946-TP specifies 200mW maximum power dissipation, while MBT3946DW1T2G specifies 150mW. This 50mW difference must be evaluated against the thermal design of the application. Applications operating at or near the 200mW limit require verification that the lower power rating of MBT3946DW1T2G is acceptable.

Q: Are the packaging formats interchangeable?

A: All three parts use Surface Mount technology with SOT-363 package designation. MMDT3946-TP is supplied in Bulk format, MMDT3946-7-F in Cut Tape & Digi-Reel format, and MBT3946DW1T2G in Tape & Reel format. The physical package and pin configuration are identical; packaging format differences relate to supply and handling only.

Q: Do the substitute parts require moisture bake-out before assembly?

A: No. Both MMDT3946-7-F and MBT3946DW1T2G carry Moisture Sensitivity Level 1 (Unlimited), indicating no moisture bake-out requirement prior to surface mount assembly.

Q: Are all three parts RoHS compliant?

A: MMDT3946-TP does not specify RoHS status. MMDT3946-7-F and MBT3946DW1T2G both carry RoHS3 Compliant certification. All three parts carry REACH Unaffected status.

Q: What is the transistor configuration of each part?

A: MMDT3946-TP is specified as a Bipolar (BJT) Transistor Array for interface applications. MMDT3946-7-F is specified as 1 NPN, 1 PNP configuration. MBT3946DW1T2G is specified as NPN, PNP configuration. All three parts integrate dual transistor functionality in a single 6-pin package.

Q: Can these parts be used interchangeably in high-frequency applications?

A: Yes. All three parts specify identical transition frequency ratings of 300MHz and 250MHz, supporting high-frequency switching and amplification applications within the specified frequency range.