MMDT4401-TP Equivalent & Substitute Parts

Part Overview

The MMDT4401-TP is a dual NPN bipolar junction transistor array manufactured by Micro Commercial Co in SOT-363 surface mount packaging. This component is classified as an active product and is RoHS3 compliant with unlimited moisture sensitivity level (MSL 1). The device integrates two NPN transistors in a single package, designed for general-purpose switching and amplification applications requiring moderate current handling and frequency response. Substitute parts are identified based on matching electrical specifications and mechanical compatibility within the SOT-363 package family, ensuring functional equivalence in circuit applications.

Key Parameters

Parameter	MMDT4401-TP Value	Unit
Transistor Type	2 NPN (Dual)	—
Current - Collector (Ic) Max	600	mA
Voltage - Collector Emitter Breakdown (Max)	40	V
Vce Saturation (Max) @ Ib, Ic	750mV @ 50mA, 500mA	mV
DC Current Gain (hFE) Min @ Ic, Vce	100 @ 150mA, 1V	—
Power - Max	200	mW
Frequency - Transition	250	MHz
Operating Temperature Range	-55 to 150	°C
Package / Case	6-TSSOP, SC-88, SOT-363	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitute parts for the MMDT4401-TP are classified into two categories based on electrical parameter alignment:

Direct Substitutes maintain identical or equivalent electrical specifications across all critical parameters: collector current (600mA), collector-emitter breakdown voltage (40V), DC current gain (hFE ≥100), power dissipation (200mW), and transition frequency (250MHz or higher). These parts are interchangeable in applications where the MMDT4401-TP is specified.

Similar Substitutes share the same package type (SOT-363) and dual NPN configuration but differ in one or more electrical parameters. These parts are suitable for applications with relaxed current or frequency requirements, or where enhanced voltage ratings or power handling provide design margin. Selection of similar substitutes requires circuit-level analysis to confirm compatibility with application requirements.

The following electrical parameters determine substitution eligibility:

Collector current rating (Ic Max): Must equal or exceed 600mA for direct substitution
Collector-emitter breakdown voltage: Must equal or exceed 40V
DC current gain (hFE): Must meet or exceed 100 at specified test conditions
Transition frequency: Must equal or exceed 250MHz for direct substitution
Package compatibility: All candidates use SOT-363 surface mount packaging
RoHS and compliance status: All candidates maintain ROHS3 compliance and REACH unaffected status

Parameter Comparison

Part Number	Manufacturer	Ic Max (mA)	Vce Breakdown (V)	hFE Min	Power Max (mW)	Frequency (MHz)	Temp Range (°C)	Packaging	Substitution Class
MMDT4401-TP	Micro Commercial Co	600	40	100	200	250	-55 to 150	Tape & Reel	Reference
MMDT4401-7-F	Diodes Incorporated	600	40	100	200	250	-55 to 150	Tape & Reel	Direct
CMKT2222A TR PBFREE	Central Semiconductor Corp	600	40	100	350	300	-65 to 150	Tape & Reel	Direct
MBT2222ADW1T1G	onsemi	600	40	100	150	300	-55 to 150	Cut Tape & Digi-Reel	Direct
MMDT2222A-7-F	Diodes Incorporated	600	40	100	200	300	-55 to 150	Tape & Reel	Direct
NSVBT2222ADW1T1G	onsemi	600	40	100	150	300	-55 to 150	Tape & Reel	Direct
BC847BS-7-F	Diodes Incorporated	100	45	200	200	100	-65 to 150	Cut Tape & Digi-Reel	Similar
MMDT3904-7-F	Diodes Incorporated	200	40	100	200	300	-55 to 150	Cut Tape & Digi-Reel	Similar

Engineering Selection Recommendations

Direct Substitutes (MMDT4401-7-F, CMKT2222A TR PBFREE, MBT2222ADW1T1G, MMDT2222A-7-F, NSVBT2222ADW1T1G) are functionally equivalent to the MMDT4401-TP and may be selected based on availability, lead time, and packaging format preference. All direct substitutes maintain active product status and full RoHS3 compliance. The MMDT4401-7-F from Diodes Incorporated provides the closest electrical match with identical specifications. CMKT2222A TR PBFREE and MMDT2222A-7-F offer enhanced transition frequency (300MHz) and extended lower temperature rating (-65°C), providing additional design margin. MBT2222ADW1T1G and NSVBT2222ADW1T1G from onsemi deliver equivalent performance with reduced maximum power dissipation (150mW), suitable for thermally constrained applications.

Similar Substitutes (BC847BS-7-F, MMDT3904-7-F) are not recommended for direct replacement in applications requiring the full 600mA collector current specification. BC847BS-7-F is limited to 100mA maximum collector current and 100MHz transition frequency, making it unsuitable for high-current or high-frequency switching applications. MMDT3904-7-F is limited to 200mA maximum collector current, restricting its use to lower-current circuit designs. These parts are suitable only for applications where circuit requirements can be met within their reduced current ratings.

All substitute candidates maintain ROHS3 compliance, REACH unaffected status, and unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard manufacturing and storage processes.

Frequently Asked Questions (FAQ)

Q: Can MMDT4401-7-F be used as a direct replacement for MMDT4401-TP?

A: Yes. MMDT4401-7-F from Diodes Incorporated is a direct substitute with identical electrical specifications: 600mA collector current, 40V breakdown voltage, 100 minimum hFE, 200mW power rating, and 250MHz transition frequency. Both parts use SOT-363 packaging and maintain equivalent operating temperature ranges (-55°C to 150°C). The primary difference is packaging format (Tape & Reel for both), making this a pin-for-pin and functionally equivalent replacement.

Q: What is the difference between direct and similar substitutes?

A: Direct substitutes meet or exceed all electrical specifications of the MMDT4401-TP, including the 600mA collector current rating and 250MHz transition frequency. Similar substitutes share the SOT-363 package and dual NPN configuration but have reduced current ratings (100mA or 200mA) or lower transition frequency (100MHz). Similar substitutes are suitable only for applications with lower current or frequency requirements than the original specification.

Q: Can BC847BS-7-F replace MMDT4401-TP in a high-current application?

A: No. BC847BS-7-F has a maximum collector current rating of 100mA, compared to 600mA for the MMDT4401-TP. This part is unsuitable for applications requiring the full 600mA current capacity. Additionally, BC847BS-7-F has a transition frequency of 100MHz, lower than the 250MHz specification of the MMDT4401-TP. Selection of BC847BS-7-F is limited to low-current switching applications.

Q: Are all substitute parts available in the same packaging format?

A: No. The MMDT4401-TP is supplied in Tape & Reel (TR) format. Direct substitutes MMDT4401-7-F, CMKT2222A TR PBFREE, MMDT2222A-7-F, and NSVBT2222ADW1T1G are available in Tape & Reel format. MBT2222ADW1T1G is supplied in Cut Tape & Digi-Reel format. BC847BS-7-F and MMDT3904-7-F are available in Cut Tape & Digi-Reel format. Packaging format selection depends on manufacturing process requirements and reel compatibility with assembly equipment.

Q: Do all substitute parts meet RoHS3 compliance?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, matching the compliance status of the MMDT4401-TP. All parts maintain unlimited moisture sensitivity level (MSL 1), ensuring compatibility with standard storage and handling procedures.

Q: Which substitute offers the best thermal performance?

A: MBT2222ADW1T1G and NSVBT2222ADW1T1G from onsemi have the lowest maximum power dissipation rating at 150mW, compared to 200mW for the MMDT4401-TP. These parts are suitable for thermally constrained applications where reduced power dissipation provides design margin. However, all direct substitutes maintain the same operating temperature range (-55°C to 150°C) and are suitable for standard industrial applications.

Q: Can MMDT3904-7-F be used in place of MMDT4401-TP?

A: MMDT3904-7-F is not a direct substitute. It has a maximum collector current rating of 200mA, one-third the 600mA rating of the MMDT4401-TP. This part is suitable only for applications with lower current requirements. If the circuit design requires 600mA collector current capacity, MMDT3904-7-F will not provide adequate current handling and should not be selected.

Q: What is the significance of transition frequency in transistor selection?

A: Transition frequency (fT) indicates the maximum frequency at which the transistor maintains useful gain. The MMDT4401-TP has a 250MHz transition frequency. Direct substitutes with 300MHz transition frequency (CMKT2222A TR PBFREE, MBT2222ADW1T1G, MMDT2222A-7-F, NSVBT2222ADW1T1G) provide enhanced high-frequency performance. BC847BS-7-F with 100MHz transition frequency is limited to lower-frequency applications. Selection should match or exceed the frequency requirements of the target circuit.

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