FQB7N20TM Equivalent & Substitute Parts

Part Overview

The FQB7N20TM is an N-Channel MOSFET manufactured by onsemi, rated for 200V drain-to-source voltage with a continuous drain current of 6.6A at 25°C. This device is packaged in the TO-263 (D2PAK) surface mount configuration and is designed for general-purpose switching applications requiring moderate voltage and current ratings.

The FQB7N20TM 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 systems utilizing this component.

Substiute Parts

FQB7N20TM

onsemiIn Stock: 972FQB7N20TM Datasheet

Current PartRFQ

RCJ081N20TL

Rohm SemiconductorIn Stock: 952RCJ081N20TL Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FQB7N20TM is determined by electrical and mechanical compatibility across the following critical parameters:

Electrical Compatibility Criteria:

• Drain-to-Source Voltage (Vdss) must equal or exceed 200V
• Continuous Drain Current (Id) must meet or exceed 6.6A at 25°C
• On-State Resistance (Rds On) must not significantly exceed the original specification to maintain circuit performance
• Gate Threshold Voltage (Vgs(th)) must be compatible with existing gate drive circuitry
• Maximum Gate Voltage (Vgs Max) must support ±30V operation
• Operating Temperature Range must encompass -55°C to 150°C

Mechanical Compatibility Criteria:

• Package must be TO-263-3 (D2PAK) surface mount configuration
• Pinout must be identical (2 Leads + Tab)
• Moisture Sensitivity Level must be MSL 1 or equivalent

The RCJ081N20TL from Rohm Semiconductor meets these substitution criteria through matching voltage ratings, compatible current ratings, equivalent package configuration, and identical pinout topology.

Parameter Comparison

Engineering Selection Recommendations

RCJ081N20TL as Primary Substitute:

The RCJ081N20TL is the qualified substitute for the FQB7N20TM based on the following engineering factors:

1. Electrical Equivalence: Both devices share identical drain-to-source voltage ratings (200V) and maximum gate voltage specifications (±30V). The RCJ081N20TL provides higher continuous drain current (8A versus 6.6A), ensuring adequate current capacity for existing circuit designs. Gate threshold voltage and gate charge specifications are within compatible operating ranges for standard gate drive circuits.

2. Package Compatibility: Both parts utilize the TO-263-3 (D2PAK) surface mount package with identical pinout configuration (2 Leads + Tab), enabling direct PCB layout compatibility without redesign.

3. Product Status and Supply: The RCJ081N20TL maintains active product status with confirmed inventory availability (921 pieces in stock), addressing the obsolescence of the FQB7N20TM and ensuring long-term supply chain continuity.

4. Regulatory Compliance: Both devices carry identical REACH Unaffected status and EAR99 ECCN classification, maintaining compliance with existing regulatory frameworks. The RCJ081N20TL is RoHS3 compliant, meeting current environmental standards.

5. Moisture Sensitivity: Both parts are classified as MSL 1 (Unlimited), indicating equivalent handling and storage requirements.

Frequently Asked Questions (FAQ)

Q: Can the RCJ081N20TL directly replace the FQB7N20TM without PCB modifications?

A: Yes. Both devices are packaged in TO-263-3 (D2PAK) with identical pinout configuration. Direct PCB substitution is possible without layout changes.

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

A: The RCJ081N20TL provides higher continuous drain current (8A versus 6.6A) and lower gate charge (8.5 nC versus 10 nC). On-state resistance is slightly higher (770 mOhm versus 690 mOhm), but both devices operate at the same 200V drain-to-source voltage and ±30V gate voltage limits.

Q: Is the RCJ081N20TL suitable for applications originally designed for the FQB7N20TM?

A: Yes. The RCJ081N20TL meets or exceeds the electrical specifications of the FQB7N20TM across all critical parameters. The higher current rating and lower gate charge provide performance benefits in most switching applications.

Q: What is the significance of the FQB7N20TM being obsolete?

A: Obsolete status indicates that onsemi has discontinued production and support for this device. The RCJ081N20TL, with active product status, provides a viable path for continued design support and supply availability.

Q: Are there any temperature range considerations when substituting these parts?

A: The FQB7N20TM specifies an operating temperature range of -55°C to 150°C. The RCJ081N20TL datasheet indicates a maximum junction temperature of 150°C. Verify that your specific application thermal requirements align with the RCJ081N20TL's thermal characteristics.

Q: Do both devices have the same moisture sensitivity requirements?

A: Yes. Both the FQB7N20TM and RCJ081N20TL are classified as MSL 1 (Unlimited), indicating identical moisture sensitivity levels and equivalent handling, storage, and reflow requirements.

Q: What regulatory certifications apply to the RCJ081N20TL?

A: The RCJ081N20TL carries REACH Unaffected status, EAR99 ECCN classification, and RoHS3 compliance, meeting current environmental and export control requirements.