MMDT5551-TP Equivalent & Substitute Parts

Part Overview

The MMDT5551-TP is a dual NPN bipolar junction transistor array manufactured by Micro Commercial Co, supplied in Tape & Reel packaging with SOT-363 surface mount configuration. This component is classified as an active product and is RoHS3 compliant. The device integrates two NPN transistors in a single package, designed for general-purpose switching and amplification applications requiring 160V collector-emitter breakdown voltage and 200mA maximum collector current.

Substitute parts are identified to address supply chain requirements, alternative packaging formats, or manufacturer availability while maintaining electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

MMDT5551-TP

Micro Commercial CoIn Stock: 934MMDT5551-TP Datasheet

Current PartRFQ

FFB5551

onsemiIn Stock: 19371FFB5551 Datasheet

DirectRFQ

MMDT5551-7-F

Diodes IncorporatedIn Stock: 48797MMDT5551-7-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the MMDT5551-TP are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor configuration: 2 NPN (Dual)
• Maximum collector current: 200mA
• Collector-emitter breakdown voltage: 160V
• Maximum power dissipation: 200mW
• Transition frequency: 300MHz
• DC current gain (hFE): 80 minimum at 10mA, 5V
• Operating temperature range: -55°C to 150°C
• Collector cutoff current (ICBO): 50nA maximum

Mechanical Compatibility Criteria:

• Mounting type: Surface Mount
• Package family: SOT-363 / SC-88 / 6-TSSOP (functionally equivalent packages)
• Moisture sensitivity level: 1 (Unlimited)

Compliance Criteria:

• RoHS3 compliance
• REACH unaffected status
• Active product status

The substitute parts FFB5551 and MMDT5551-7-F meet all specified electrical parameters and operate within the defined temperature range. Packaging variations (SOT-363 versus SC-88) represent equivalent mechanical footprints within the 6-pin surface mount family. Differences in Vce saturation test conditions do not affect functional substitution, as both parts maintain saturation performance within acceptable operating margins.

Parameter Comparison

Engineering Selection Recommendations

All three parts—MMDT5551-TP, FFB5551, and MMDT5551-7-F—are active products with identical electrical specifications and full RoHS3 compliance. Selection between these components is determined by packaging availability and supply chain requirements rather than electrical performance differences.

MMDT5551-TP (Micro Commercial Co): Supplied in Tape & Reel format with SOT-363 package designation. Current inventory: 905 units.

FFB5551 (onsemi): Supplied in Cut Tape & Digi-Reel format with SC-88 (SC-70-6) package designation. Current inventory: 19,300 units. The SC-88 package is mechanically equivalent to SOT-363 within the 6-pin surface mount family.

MMDT5551-7-F (Diodes Incorporated): Supplied in Cut Tape & Digi-Reel format with SOT-363 package designation. Current inventory: 48,718 units.

All parts maintain REACH unaffected status and EAR99 export classification. Selection should prioritize availability, packaging format compatibility with assembly processes, and supplier lead times.

Frequently Asked Questions (FAQ)

Q: Can FFB5551 replace MMDT5551-TP in a circuit designed for SOT-363 packaging?

A: FFB5551 uses SC-88 (SC-70-6) package designation, which is mechanically equivalent to SOT-363 within the 6-pin surface mount family. Both packages are functionally interchangeable for PCB layout and assembly purposes. Verify footprint compatibility with your specific PCB design documentation.

Q: What is the difference between the Vce saturation specifications listed for these parts?

A: MMDT5551-TP specifies Vce saturation at 150mV (1mA, 10mA), while FFB5551 and MMDT5551-7-F specify 200mV (5mA, 50mA). These represent different test conditions but do not affect functional substitution. Both specifications fall within acceptable saturation performance for general-purpose switching applications.

Q: Are all three parts RoHS3 compliant?

A: Yes. MMDT5551-TP, FFB5551, and MMDT5551-7-F are all RoHS3 compliant with Moisture Sensitivity Level 1 (Unlimited).

Q: Which part has the highest current inventory?

A: MMDT5551-7-F (Diodes Incorporated) has the highest inventory at 48,718 units, followed by FFB5551 (onsemi) at 19,300 units, and MMDT5551-TP (Micro Commercial Co) at 905 units.

Q: Do these parts have identical electrical performance?

A: Yes. All three parts share identical maximum ratings for collector current (200mA), collector-emitter breakdown voltage (160V), power dissipation (200mW), transition frequency (300MHz), and DC current gain (80 minimum at 10mA, 5V). Operating temperature range is identical at -55°C to 150°C.

Q: What is the significance of the packaging format differences (Tape & Reel versus Cut Tape & Digi-Reel)?

A: Packaging format affects supply chain logistics and assembly line compatibility. Tape & Reel format is standard for high-volume automated assembly. Cut Tape & Digi-Reel format provides flexibility for lower-volume or mixed-component orders. Electrical and mechanical performance is identical across all packaging formats.

Q: Can I use MMDT5551-7-F as a direct replacement for MMDT5551-TP?

A: Yes. MMDT5551-7-F is manufactured by Diodes Incorporated and uses the same base product number (MMDT5551) with SOT-363 package. It is a direct electrical and mechanical equivalent with identical specifications.