MMDT2227-7 Equivalent & Substitute Parts

Part Overview

The MMDT2227-7 is a Bipolar (BJT) Transistor Array featuring 1 NPN and 1 PNP configuration rated for 40V and 60V operation respectively, with a maximum collector current of 600mA and 200mW power dissipation. The device is housed in a 6-TSSOP/SC-88/SOT-363 surface mount package and operates across a temperature range of -55°C to 150°C.

The MMDT2227-7 is currently discontinued at DiGi Electronics. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for production and repair applications. Substitute parts must maintain electrical compatibility within the specified parameter ranges while meeting current manufacturing and compliance standards.

Key Parameters

Parameter	Value
Transistor Type	1 NPN, 1 PNP
Maximum Collector Current (Ic)	600mA
Collector-Emitter Breakdown Voltage (Max)	40V, 60V
Maximum Power Dissipation	200mW
Transition Frequency	300MHz, 200MHz
Operating Temperature Range	-55°C to 150°C (TJ)
Package Type	6-TSSOP, SC-88, SOT-363
Mounting Type	Surface Mount
DC Current Gain (hFE Min)	100 @ 150mA, 10V

Substitute Part Grouping Explanation

Substitution eligibility for the MMDT2227-7 is determined by the following critical parameters:

Package Compatibility: All substitute parts must utilize the 6-TSSOP/SC-88/SOT-363 surface mount package to ensure mechanical and electrical compatibility with existing PCB layouts.

Electrical Configuration: Substitute parts must maintain a dual-transistor array configuration with 1 NPN and 1 PNP transistor pair.

Voltage Rating: Substitute parts must support minimum collector-emitter breakdown voltages of 40V (NPN) and 60V (PNP), or higher ratings that encompass these specifications.

Current Capability: Substitute parts must support a maximum collector current of 600mA or greater to maintain functional equivalence.

Power Dissipation: Substitute parts must support a maximum power dissipation of 200mW or greater.

Operating Temperature: Substitute parts must support the full operating temperature range of -55°C to 150°C.

The MMDT2227-7-F is a direct manufacturer equivalent from Diodes Incorporated with identical electrical specifications and improved product status (Active). The BC846BPDW1T1G and BC846PNH6327XTSA1 are functional substitutes with higher voltage ratings and different current/power characteristics that remain compatible within the specified parameter envelope.

Parameter Comparison

Parameter	MMDT2227-7	MMDT2227-7-F	BC846BPDW1T1G	BC846PNH6327XTSA1
Manufacturer	Diodes Incorporated	Diodes Incorporated	onsemi	Infineon Technologies
Transistor Type	1 NPN, 1 PNP	1 NPN, 1 PNP	NPN, PNP	1 NPN, 1 PNP
Maximum Collector Current (Ic)	600mA	600mA	100mA	100mA
Collector-Emitter Breakdown Voltage (Max)	40V, 60V	40V, 60V	65V	65V
Maximum Power Dissipation	200mW	200mW	380mW	250mW
Transition Frequency	300MHz, 200MHz	300MHz, 200MHz	100MHz	250MHz
Operating Temperature Range	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C	-55°C to 150°C
Package / Case	6-TSSOP, SC-88, SOT-363	6-TSSOP, SC-88, SOT-363	6-TSSOP, SC-88, SOT-363	6-VSSOP, SC-88, SOT-363
RoHS Status	RoHS Non-Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Discontinued	Active	Active	Last Time Buy

Engineering Selection Recommendations

MMDT2227-7-F (Direct Equivalent): This part is the preferred substitute for the MMDT2227-7. It is manufactured by Diodes Incorporated and maintains identical electrical specifications including 600mA maximum collector current, 40V/60V breakdown voltages, 200mW power dissipation, and 300MHz/200MHz transition frequencies. The MMDT2227-7-F is currently Active in production status and ROHS3 compliant, addressing both availability and regulatory compliance concerns. This part is suitable for direct replacement in all applications where the MMDT2227-7 was originally specified.

BC846BPDW1T1G (Functional Substitute): This onsemi part provides functional substitution with higher voltage ratings (65V) and increased power dissipation capability (380mW). However, the maximum collector current is reduced to 100mA, which represents a significant limitation compared to the MMDT2227-7's 600mA rating. The transition frequency is also reduced to 100MHz. This part is suitable only for applications where collector current requirements do not exceed 100mA. The part is currently Active and ROHS3 compliant.

BC846PNH6327XTSA1 (Functional Substitute): This Infineon Technologies part offers higher voltage ratings (65V) and maintains a transition frequency of 250MHz. Like the BC846BPDW1T1G, the maximum collector current is limited to 100mA. The power dissipation rating is 250mW. This part is designated as Last Time Buy, indicating limited future availability. Selection of this part should be avoided for new designs due to its end-of-life status.

For new designs and production applications, MMDT2227-7-F is the recommended selection. For legacy systems requiring the original MMDT2227-7, MMDT2227-7-F provides direct compatibility. The BC846 variants are suitable only for applications with collector current requirements of 100mA or less.

Frequently Asked Questions (FAQ)

Q: Can the MMDT2227-7-F be used as a direct replacement for the MMDT2227-7?

A: Yes. The MMDT2227-7-F is a direct equivalent manufactured by Diodes Incorporated with identical electrical specifications. Both parts feature 600mA maximum collector current, 40V/60V breakdown voltages, 200mW power dissipation, and operate across -55°C to 150°C. The primary difference is product status: MMDT2227-7-F is Active and ROHS3 compliant, while the original MMDT2227-7 is discontinued and RoHS non-compliant.

Q: What is the key limitation of the BC846BPDW1T1G and BC846PNH6327XTSA1 substitutes?

A: Both BC846 variants have a maximum collector current rating of 100mA, compared to the MMDT2227-7's 600mA capability. These parts are suitable only for applications where collector current does not exceed 100mA. Applications requiring higher current handling must use the MMDT2227-7-F.

Q: Are all substitute parts compatible with the same PCB layout?

A: Yes. All listed substitute parts utilize the 6-TSSOP/SC-88/SOT-363 surface mount package, ensuring mechanical and electrical compatibility with existing PCB designs. Pin configurations remain consistent across all parts.

Q: What is the significance of the "Last Time Buy" status for BC846PNH6327XTSA1?

A: Last Time Buy status indicates that Infineon Technologies has announced the end of production for this part. While current inventory may be available, future procurement will not be possible. This part should not be selected for new designs or long-term production applications.

Q: Does the higher voltage rating of the BC846 variants provide an advantage?

A: The BC846 variants are rated for 65V breakdown voltage compared to the MMDT2227-7's 40V/60V ratings. This higher voltage rating provides additional design margin in high-voltage applications. However, this advantage is offset by the reduced current capability (100mA vs. 600mA) and lower transition frequency (100MHz vs. 300MHz/200MHz).

Q: Are there compliance differences between the substitute parts?

A: Yes. The MMDT2227-7 is RoHS non-compliant, while MMDT2227-7-F, BC846BPDW1T1G, and BC846PNH6327XTSA1 are all ROHS3 compliant. All parts are REACH unaffected and classified as EAR99 for export control purposes.

Q: What is the moisture sensitivity level for these parts?

A: All listed parts, including the MMDT2227-7 and its substitutes, have a Moisture Sensitivity Level (MSL) of 1, indicating unlimited shelf life without moisture control requirements.

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