IMT4-7-F Equivalent & Substitute Parts

Part Overview

The IMT4-7-F is a Bipolar (BJT) Transistor Array featuring a dual PNP configuration in SOT-26 surface mount packaging, manufactured by Diodes Incorporated. This device is rated for 120V collector-emitter breakdown voltage with a maximum collector current of 50mA and 225mW power dissipation. The IMT4-7-F is classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain functional compatibility while meeting or exceeding the electrical specifications of the original device.

Substiute Parts

IMT4-7-F

Diodes IncorporatedIn Stock: 2307IMT4-7-F Datasheet

Current PartRFQ

DMMT5401-7-F

Diodes IncorporatedIn Stock: 20178DMMT5401-7-F Datasheet

MFR RecommendedRFQ

MMDT5401-7-F

Diodes IncorporatedIn Stock: 116454MMDT5401-7-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the IMT4-7-F is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor configuration must be 2 PNP (Dual)
• Collector-emitter breakdown voltage must equal or exceed 120V
• Maximum collector current must equal or exceed 50mA
• Operating temperature range must encompass -55°C ~ 150°C
• Surface mount technology with compatible pinout

Mechanical Compatibility Criteria:

• Package type must be SOT-26 or pin-compatible equivalent
• Mounting type must be surface mount

The substitute parts DMMT5401-7-F and MMDT5401-7-F both exceed the electrical specifications of the IMT4-7-F across all critical parameters. Both devices feature 150V breakdown voltage (exceeding the 120V requirement), 200mA maximum collector current (exceeding the 50mA requirement), and identical operating temperature ranges. Both are manufactured by Diodes Incorporated and maintain ROHS3 compliance and MSL-1 rating.

The primary distinction between the two substitutes is packaging: DMMT5401-7-F retains the SOT-26 package format, while MMDT5401-7-F uses SOT-363 (6-TSSOP) packaging, which requires PCB layout modification.

Parameter Comparison

Engineering Selection Recommendations

DMMT5401-7-F Selection: The DMMT5401-7-F is the direct substitute for the IMT4-7-F when package compatibility is required. This device maintains the SOT-26 surface mount package, eliminating the need for PCB layout modifications. The DMMT5401-7-F is classified as Active product status, ensuring long-term availability and supply chain continuity. All electrical specifications exceed the IMT4-7-F requirements, including 150V breakdown voltage, 200mA collector current capability, and 300MHz transition frequency. The device is ROHS3 compliant and carries MSL-1 rating, matching the compliance profile of the original part. Inventory availability of 20,113 pieces supports production requirements.

MMDT5401-7-F Selection: The MMDT5401-7-F provides an alternative substitute when package footprint optimization is acceptable. This device uses SOT-363 (6-TSSOP) packaging, which offers a smaller form factor than SOT-26. The MMDT5401-7-F is classified as Active product status with significantly higher inventory availability (116,400 pieces). Electrical specifications match the DMMT5401-7-F, with 150V breakdown voltage and 200mA collector current. The transition frequency of 300MHz exceeds the IMT4-7-F specification. ROHS3 compliance and MSL-1 rating are maintained. PCB layout redesign is required for this substitution due to package differences.

Both substitute parts are manufactured by Diodes Incorporated, ensuring consistent quality and reliability standards. Selection between DMMT5401-7-F and MMDT5401-7-F depends on whether existing PCB layouts can accommodate package changes or must remain fixed.

Frequently Asked Questions (FAQ)

Q: Can the DMMT5401-7-F directly replace the IMT4-7-F without PCB modifications?

A: Yes. The DMMT5401-7-F uses the same SOT-26 package as the IMT4-7-F, enabling direct substitution on existing PCBs without layout changes. Pin configuration and footprint are compatible.

Q: What are the key electrical advantages of the substitute parts?

A: Both DMMT5401-7-F and MMDT5401-7-F provide higher collector current capability (200mA versus 50mA), increased breakdown voltage (150V versus 120V), and higher transition frequency (300MHz versus 140MHz). These enhancements provide greater design margin and performance headroom.

Q: Why does the MMDT5401-7-F have lower maximum power rating (200mW) compared to DMMT5401-7-F (300mW)?

A: The power rating difference reflects the thermal characteristics of the SOT-363 package versus SOT-26. SOT-363 is a smaller package with different thermal dissipation properties. Both devices remain suitable for applications within their respective power specifications.

Q: Are there compliance or certification differences between the substitute parts?

A: No. Both DMMT5401-7-F and MMDT5401-7-F maintain ROHS3 compliance, MSL-1 rating, and REACH unaffected status, matching the IMT4-7-F compliance profile.

Q: What is the inventory status of the substitute parts?

A: DMMT5401-7-F has 20,113 pieces in stock. MMDT5401-7-F has 116,400 pieces in stock. Both are classified as Active products, ensuring ongoing availability.

Q: Can the MMDT5401-7-F be used if the PCB layout cannot be modified?

A: No. The MMDT5401-7-F uses SOT-363 packaging, which has a different footprint than the SOT-26 package of the IMT4-7-F. PCB layout modification is required for this substitution.

Q: Are the DC current gain specifications equivalent between the parts?

A: No. The IMT4-7-F specifies minimum hFE of 180 @ 2mA, 6V, while both substitutes specify minimum hFE of 60 @ 10mA, 5V. These are measured at different operating points and cannot be directly compared. Circuit design must account for the different gain characteristics.

Q: What is the significance of the "Matched Pair" designation on the DMMT5401-7-F?

A: The DMMT5401-7-F is specified as a Matched Pair, indicating tighter matching between the two PNP transistors within the dual package. This specification is provided for reference but does not affect basic substitution compatibility.