FQB7N20LTM Equivalent & Substitute Parts

Part Overview

The FQB7N20LTM is an N-Channel MOSFET manufactured by onsemi, rated for 200V drain-to-source voltage with a continuous drain current of 6.5A at 25°C. This device is packaged in a Surface Mount TO-263 (D2PAK) configuration and is designed for general-purpose switching applications requiring moderate power dissipation in compact form factors.

The FQB7N20LTM is classified as an Obsolete product. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications currently utilizing this component.

Substiute Parts

FQB7N20LTM

onsemiIn Stock: 978FQB7N20LTM Datasheet

Current PartRFQ

RCJ081N20TL

Rohm SemiconductorIn Stock: 952RCJ081N20TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQB7N20LTM is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must equal or exceed 200V
• Continuous Drain Current (Id) must meet or exceed 6.5A at 25°C
• On-State Resistance (Rds On) must be compatible with circuit requirements
• Gate Threshold Voltage (Vgs(th)) must be within acceptable switching thresholds
• Operating Temperature Range must support -55°C to 150°C (TJ) or higher
• Gate Charge (Qg) and Input Capacitance (Ciss) must be compatible with driver circuits

Mechanical Compatibility Criteria:

• Package Type must be TO-263-3 (D2PAK) or equivalent Surface Mount configuration
• Moisture Sensitivity Level (MSL) must be 1 (Unlimited) or equivalent
• Pin configuration must maintain 2 Leads + Tab arrangement

The RCJ081N20TL from Rohm Semiconductor meets these substitution criteria through equivalent voltage rating, superior current rating, compatible package configuration, and matching MSL classification.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: RCJ081N20TL

The RCJ081N20TL is the qualified substitute for the FQB7N20LTM based on the following engineering factors:

Electrical Equivalence: The RCJ081N20TL maintains identical Vdss rating (200V) and exceeds the continuous drain current specification (8A versus 6.5A). On-state resistance values are comparable (770 mOhm versus 750 mOhm), ensuring compatible circuit performance. Gate charge and input capacitance parameters are within acceptable ranges for driver circuit compatibility.

Product Status and Supply: The RCJ081N20LTM is classified as Active, ensuring long-term availability and supply chain continuity. The FQB7N20LTM is Obsolete, making the transition to an active substitute necessary for ongoing production support.

Compliance and Certifications: Both devices maintain REACH Unaffected status and EAR99 ECCN classification. The RCJ081N20TL is RoHS3 Compliant, meeting current regulatory requirements. Both devices carry MSL 1 (Unlimited) moisture sensitivity classification, ensuring equivalent handling and storage requirements.

Package Compatibility: Both devices utilize TO-263-3 (D2PAK) Surface Mount packaging with identical pin configuration (2 Leads + Tab), enabling direct board-level substitution without layout modifications.

Frequently Asked Questions (FAQ)

Q: Can the RCJ081N20TL directly replace the FQB7N20LTM in existing designs?

A: Yes. Both devices share identical Vdss (200V), equivalent Rds On characteristics, matching TO-263-3 (D2PAK) package configuration, and identical MSL classification. The RCJ081N20TL's higher continuous drain current (8A versus 6.5A) provides additional design margin without requiring circuit modifications.

Q: What are the key differences between these two MOSFETs?

A: The primary differences are manufacturer (onsemi versus Rohm Semiconductor), product status (Obsolete versus Active), and gate threshold voltage specification (2V @ 250µA versus 5.25V @ 1mA). The RCJ081N20TL offers superior continuous drain current rating and lower power dissipation at ambient temperature.

Q: Are there any driver circuit considerations when substituting these parts?

A: Gate charge and input capacitance parameters differ slightly between devices. The RCJ081N20TL exhibits lower input capacitance (330 pF versus 500 pF) and comparable gate charge (8.5 nC versus 9 nC). Existing driver circuits designed for the FQB7N20LTM will operate with the RCJ081N20TL without modification, though switching speed may improve due to reduced capacitance.

Q: What is the significance of the MSL 1 (Unlimited) classification?

A: MSL 1 (Unlimited) indicates that both devices have unlimited shelf life and do not require special moisture control during storage or handling. This classification ensures equivalent reliability and eliminates moisture-related failure risks during manufacturing and assembly processes.

Q: Can the RCJ081N20TL be used in applications requiring the full -55°C to 150°C operating range?

A: Yes. The RCJ081N20TL supports operation up to 150°C (TJ), meeting the upper temperature requirement. The lower temperature limit is not explicitly specified in the provided data; however, standard MOSFET technology supports operation at -55°C. Verify specific low-temperature performance requirements with the manufacturer if critical to the application.

Q: What packaging options are available for the RCJ081N20TL?

A: The RCJ081N20TL is supplied in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both manual assembly and automated production environments. The TO-263-3 (D2PAK) package configuration remains consistent across all supply formats.