MMDT4124-7 Equivalent & Substitute Parts

Part Overview

The MMDT4124-7 is a dual NPN bipolar junction transistor array manufactured by Diodes Incorporated in a surface mount SOT-363 package. This component integrates two independent NPN transistors on a single die, designed for general-purpose switching and amplification applications requiring compact form factors.

The MMDT4124-7 is classified as obsolete. Locating equivalent substitute parts is necessary to support ongoing production requirements, maintenance operations, and design continuity for systems currently utilizing this component.

Substiute Parts

MMDT4124-7

Diodes IncorporatedIn Stock: 910MMDT4124-7 Datasheet

Current PartRFQ

MMDT3904-TP

Micro Commercial CoIn Stock: 6823MMDT3904-TP Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMDT4124-7 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Transistor configuration: Dual NPN array
• Maximum collector current: 200mA or greater
• Collector-Emitter breakdown voltage: Equal to or exceeding 25V
• Vce saturation characteristics: 300mV maximum at specified bias conditions
• Transition frequency: 300MHz or greater
• Power dissipation capability: 200mW or greater
• DC current gain: Minimum 100 at specified operating points

Mechanical Compatibility Requirements:

• Package type: SOT-363 (6-TSSOP, SC-88)
• Mounting type: Surface mount
• Moisture sensitivity level: 1 (Unlimited)

Environmental Compatibility Requirements:

• Operating temperature range: -55°C to 150°C or wider

The MMDT3904-TP meets all electrical and mechanical compatibility criteria for direct substitution. This part exceeds the minimum breakdown voltage specification (40V versus 25V required) while maintaining identical current ratings, power dissipation, transition frequency, and package configuration.

Parameter Comparison

Engineering Selection Recommendations

Product Status Consideration: The MMDT4124-7 is classified as obsolete, making the MMDT3904-TP the appropriate selection for new procurement and ongoing production support. The MMDT3904-TP maintains active product status with Micro Commercial Co, ensuring continued availability and supply chain reliability.

Compliance and Certification: The MMDT3904-TP is RoHS3 compliant, whereas the MMDT4124-7 is RoHS non-compliant. For applications subject to RoHS directives or customer requirements mandating RoHS compliance, the MMDT3904-TP is the required selection.

Both parts maintain REACH Unaffected status and EAR99 export classification, with identical HTSUS coding (8541.21.0075).

Electrical Performance: The MMDT3904-TP provides superior voltage rating (40V versus 25V), offering enhanced margin for transient voltage protection and circuit reliability. All other electrical parameters remain equivalent or superior, ensuring functional compatibility in existing circuit designs.

Packaging and Handling: The MMDT3904-TP is supplied in Tape & Reel (TR) packaging, suitable for automated assembly operations. Both parts share identical SOT-363 package geometry and moisture sensitivity classification, eliminating requalification requirements for PCB assembly processes.

Frequently Asked Questions (FAQ)

Q: Can the MMDT3904-TP be used as a direct replacement for the MMDT4124-7 in existing designs?

A: Yes. The MMDT3904-TP is electrically and mechanically compatible with the MMDT4124-7. Both components feature identical collector current ratings (200mA), power dissipation (200mW), transition frequency (300MHz), saturation voltage characteristics, and SOT-363 package configuration. The MMDT3904-TP exceeds the minimum breakdown voltage requirement (40V versus 25V), providing additional design margin.

Q: What is the primary difference between these two parts?

A: The primary differences are: (1) Collector-Emitter breakdown voltage: MMDT3904-TP rated at 40V versus MMDT4124-7 at 25V; (2) Product status: MMDT3904-TP is active while MMDT4124-7 is obsolete; (3) RoHS compliance: MMDT3904-TP is RoHS3 compliant while MMDT4124-7 is non-compliant; (4) DC current gain specification point: MMDT3904-TP specified at 100 @ 10mA, 1V versus MMDT4124-7 at 120 @ 2mA, 1V.

Q: Are there any circuit design considerations when substituting the MMDT3904-TP for the MMDT4124-7?

A: No design modifications are required. The higher breakdown voltage rating of the MMDT3904-TP (40V) is a conservative enhancement that improves circuit robustness without affecting normal operation. All switching and amplification characteristics remain equivalent.

Q: What is the packaging difference between these parts?

A: Both parts use the SOT-363 package (6-TSSOP, SC-88) for surface mount assembly. The MMDT3904-TP is supplied in Tape & Reel (TR) format for automated pick-and-place operations, while the MMDT4124-7 packaging format is not specified in available documentation. The physical package dimensions and PCB footprint are identical.

Q: Are there any supply chain advantages to using the MMDT3904-TP?

A: Yes. The MMDT3904-TP maintains active product status with 6810 pieces in current inventory, compared to the obsolete MMDT4124-7 with limited remaining stock (899 pieces). The MMDT3904-TP ensures long-term availability and supply continuity for production requirements.

Q: Does the MMDT3904-TP require different handling or storage procedures?

A: No. Both parts share identical moisture sensitivity level classification (MSL 1 - Unlimited), eliminating any differences in handling, storage, or reflow soldering procedures. Existing assembly process specifications remain valid.