FMMT619-TP Equivalent & Substitute Parts

Part Overview

The FMMT619-TP is an NPN bipolar junction transistor manufactured by Micro Commercial Co, designed for interface applications requiring moderate current switching and frequency response. This surface mount device operates across an extended temperature range of -55°C to 150°C and is classified as Active product status. Substitute parts are identified to address inventory availability, extended voltage ratings, or enhanced power dissipation requirements while maintaining functional compatibility within specified electrical parameters.

Substiute Parts

FMMT619-TP

Micro Commercial CoIn Stock: 981FMMT619-TP Datasheet

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FSB560A

onsemiIn Stock: 666306FSB560A Datasheet

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NSS60201LT1G

onsemiIn Stock: 18256NSS60201LT1G Datasheet

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PBSS4350T,215

Nexperia USA Inc.In Stock: 17616PBSS4350T,215 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the FMMT619-TP is determined by the following critical parameters:

Mandatory Compatibility Criteria:

• Transistor Type: NPN
• Current - Collector (Ic) Max: 2 A (minimum requirement)
• Voltage - Collector Emitter Breakdown: ≥50 V
• Mounting Type: Surface Mount
• Package / Case: SOT-23-3 compatible footprint

Secondary Consideration Parameters:

• Frequency - Transition: ≥100 MHz preferred
• Power - Max: ≥350 mW preferred
• Operating Temperature Range: -55°C to 150°C minimum

The identified substitute parts meet or exceed the mandatory criteria. FSB560A and NSS60201LT1G provide elevated voltage ratings (60 V) with equivalent current handling. PBSS4350T,215 maintains the original 50 V specification with enhanced power dissipation capability. All substitutes maintain SOT-23-3 package compatibility and NPN configuration.

Parameter Comparison

Engineering Selection Recommendations

FSB560A (onsemi): This substitute provides a 60 V collector-emitter breakdown voltage, offering 20% higher voltage margin than the FMMT619-TP. Power dissipation increases to 500 mW. The transition frequency reduces to 75 MHz, which remains suitable for interface applications. RoHS3 compliance and MSL 1 rating provide environmental and handling advantages. Appropriate for applications requiring enhanced voltage headroom.

NSS60201LT1G (onsemi): This substitute maintains the 100 MHz transition frequency specification while providing 60 V breakdown voltage. Vce saturation improves to 140 mV at rated conditions, reducing power loss. Power dissipation reaches 460 mW. RoHS3 compliance and MSL 1 rating are provided. Suitable for applications prioritizing frequency response and saturation characteristics.

PBSS4350T,215 (Nexperia USA Inc.): This substitute maintains the original 50 V voltage specification while offering the highest power dissipation at 540 mW. Transition frequency matches the original at 100 MHz. RoHS3 compliance and MSL 1 rating are provided. Appropriate for applications requiring maximum thermal headroom within the original voltage class.

All substitute parts maintain Active product status and full temperature range operation. Selection depends on specific application requirements regarding voltage margin, frequency response, and thermal dissipation.

Frequently Asked Questions (FAQ)

Q: Can FSB560A replace FMMT619-TP in all applications?

A: FSB560A is electrically compatible for applications operating at or below 50 V. The 60 V rating provides additional voltage margin. However, the transition frequency is 75 MHz compared to 100 MHz in the FMMT619-TP. Applications requiring 100 MHz operation should use NSS60201LT1G or PBSS4350T,215 instead.

Q: What is the primary difference between NSS60201LT1G and FSB560A?

A: Both provide 60 V breakdown voltage and 2 A collector current. NSS60201LT1G maintains 100 MHz transition frequency and achieves lower Vce saturation (140 mV), resulting in reduced power dissipation. FSB560A operates at 75 MHz with higher saturation voltage (300 mV). Choose NSS60201LT1G for frequency-critical applications.

Q: Is PBSS4350T,215 suitable for high-temperature applications?

A: PBSS4350T,215 operates across the full -55°C to 150°C temperature range, matching the FMMT619-TP specification. The elevated power rating (540 mW) provides thermal margin in high-dissipation scenarios. Operating temperature capability is equivalent across all four parts.

Q: Are all substitute parts available in SOT-23-3 packaging?

A: Yes. FMMT619-TP, FSB560A, NSS60201LT1G, and PBSS4350T,215 all use SOT-23-3 package configuration, ensuring mechanical and electrical footprint compatibility on printed circuit boards.

Q: What compliance certifications apply to substitute parts?

A: FSB560A, NSS60201LT1G, and PBSS4350T,215 are all ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. All parts carry REACH Unaffected status and EAR99 ECCN classification.

Q: Which substitute offers the best saturation performance?

A: NSS60201LT1G provides the lowest Vce saturation at 140 mV (measured at 200 mA base current, 2 A collector current), reducing power loss during switching. This characteristic is advantageous in high-frequency switching applications.

Q: Can I use PBSS4350T,215 as a direct replacement for FMMT619-TP?

A: Yes. PBSS4350T,215 maintains the 50 V voltage specification and 100 MHz frequency response of the FMMT619-TP. The increased power rating (540 mW versus 350 mW) provides additional thermal margin without affecting electrical compatibility.