MMDT3946LP4-7 Equivalent & Substitute Parts

Part Overview

The MMDT3946LP4-7 is an active Bipolar (BJT) Transistor Array manufactured by Diodes Incorporated, configured as a complementary pair with 1 NPN and 1 PNP transistor in a 6-pin DFN surface mount package. This device is designed for applications requiring matched NPN/PNP transistor pairs with 40V breakdown voltage and 200mA maximum collector current ratings.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the specified parameters. The primary substitute listed operates under the same voltage and current specifications but differs in transistor configuration and package type.

Key Parameters

Parameter	Value	Unit
Transistor Type	1 NPN, 1 PNP	Configuration
Current - Collector (Ic) Max	200	mA
Voltage - Collector Emitter Breakdown (Max)	40	V
Vce Saturation (Max) @ Ib, Ic	300mV @ 5mA, 50mA / 400mV @ 5mA, 50mA	V
DC Current Gain (hFE) Min @ Ic, Vce	100	@ 10mA, 1V
Power - Max	200	mW
Frequency - Transition	300MHz, 250MHz	MHz
Package / Case	6-SMD, No Lead (DFN1310H4-6)	Surface Mount
RoHS Status	ROHS3 Compliant	Certification
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Classification

Substitute Part Grouping Explanation

Substitution eligibility for the MMDT3946LP4-7 is determined by the following critical parameters:

Electrical Equivalence Criteria:

Maximum Collector Current (Ic): 200mA
Collector Emitter Breakdown Voltage: 40V
DC Current Gain (hFE): Minimum 100 @ 10mA, 1V
Power Dissipation: 200mW maximum
Transition Frequency: 300MHz or higher

Mechanical Compatibility Criteria:

Surface Mount technology
RoHS3 compliance
MSL Level 1 (Unlimited moisture sensitivity)

The MMDT3904-TP substitute meets the electrical performance specifications for collector current, breakdown voltage, current gain, power rating, and transition frequency. However, the transistor configuration differs: MMDT3904-TP contains 2 NPN transistors (dual configuration) versus the complementary 1 NPN/1 PNP pair of the MMDT3946LP4-7. This configuration difference requires circuit-level evaluation for applications dependent on PNP functionality.

Parameter Comparison

Parameter	MMDT3946LP4-7	MMDT3904-TP	Match Status
Manufacturer	Diodes Incorporated	Micro Commercial Co	Different
Transistor Type	1 NPN, 1 PNP	2 NPN (Dual)	Different Configuration
Current - Collector (Ic) Max	200	200	Equivalent
Voltage - Collector Emitter Breakdown (Max)	40	40	Equivalent
Vce Saturation (Max) @ Ib, Ic	300mV @ 5mA, 50mA / 400mV @ 5mA, 50mA	300mV @ 5mA, 50mA	Partial Match
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 10mA, 1V	100 @ 10mA, 1V	Equivalent
Power - Max	200	200	Equivalent
Frequency - Transition	300MHz, 250MHz	300MHz	Equivalent
Package / Case	6-SMD, No Lead (DFN1310H4-6)	6-TSSOP, SC-88, SOT-363	Different Package
Mounting Type	Surface Mount	Surface Mount	Equivalent
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Equivalent
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	Equivalent
Operating Temperature	Not specified	-55°C ~ 150°C (TJ)	Partial Data

Engineering Selection Recommendations

MMDT3946LP4-7 Primary Selection: The MMDT3946LP4-7 remains the primary component for applications requiring a complementary NPN/PNP transistor pair. This device is Active status, ROHS3 compliant, and maintains unlimited moisture sensitivity classification. The DFN1310H4-6 package provides compact surface mount integration suitable for space-constrained designs.

MMDT3904-TP Substitution Conditions: The MMDT3904-TP substitute is electrically equivalent for collector current, breakdown voltage, current gain, power dissipation, and transition frequency specifications. Both devices maintain Active product status and identical RoHS3 and MSL certifications.

Substitution of MMDT3904-TP for MMDT3946LP4-7 is limited to applications where:

PNP transistor functionality is not required in the circuit design
Dual NPN configuration meets the application requirements
PCB layout accommodates the SOT-363 package footprint instead of DFN1310H4-6

Package footprint differences require PCB redesign. The SOT-363 package has different pin spacing and land pattern compared to the DFN1310H4-6 package.

Frequently Asked Questions (FAQ)

Q: Can MMDT3904-TP directly replace MMDT3946LP4-7 without circuit modification?

A: Direct replacement is not possible without circuit evaluation. The MMDT3946LP4-7 contains a complementary NPN/PNP pair, while MMDT3904-TP contains two NPN transistors. Applications utilizing the PNP transistor require alternative solutions or circuit redesign.

Q: Are the electrical specifications identical between these parts?

A: Electrical specifications for collector current (200mA), breakdown voltage (40V), current gain (100 @ 10mA, 1V), power rating (200mW), and transition frequency (300MHz) are equivalent. Vce saturation specifications differ slightly: MMDT3904-TP specifies only the 300mV condition, while MMDT3946LP4-7 specifies both 300mV and 400mV conditions for NPN and PNP respectively.

Q: What are the package differences between these parts?

A: MMDT3946LP4-7 uses a 6-pin DFN1310H4-6 package (no-lead, 1.3mm × 1.0mm). MMDT3904-TP uses a 6-pin SOT-363 package (SC-88). These packages have different footprints, pin configurations, and land patterns. PCB redesign is required for substitution.

Q: Do both parts meet the same compliance standards?

A: Yes. Both MMDT3946LP4-7 and MMDT3904-TP are ROHS3 compliant, REACH unaffected, and classified as MSL Level 1 (Unlimited). Both maintain Active product status.

Q: What is the operating temperature range for each part?

A: Operating temperature range is not specified for MMDT3946LP4-7 in the provided data. MMDT3904-TP specifies -55°C to 150°C (TJ). Verify temperature requirements with manufacturer datasheets for applications with specific thermal constraints.

Q: Are there inventory considerations for these parts?

A: MMDT3946LP4-7 has 65,100 pieces in stock. MMDT3904-TP has 6,810 pieces in stock. Availability differs significantly between the two parts.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message