STC5NF20V Equivalent & Substitute Parts

Part Overview

The STC5NF20V is a dual N-channel MOSFET array manufactured by STMicroelectronics, designed for surface mount applications in the 8-TSSOP package. This device operates at 20V drain-to-source voltage with a continuous drain current rating of 5A and maximum power dissipation of 1.5W. The part is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and procurement needs.

Substiute Parts

STC5NF20V

STMicroelectronicsIn Stock: 41129STC5NF20V Datasheet

Current PartRFQ

AO8820

Alpha & Omega Semiconductor Inc.In Stock: 120333AO8820 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the STC5NF20V is determined by strict equivalence across the following critical parameters:

Mandatory Matching Parameters:

• Drain to Source Voltage (Vdss): 20V
• Package Type: 8-TSSOP surface mount
• Configuration: 2 N-Channel (Dual)
• FET Feature: Logic Level Gate
• Operating Temperature Range: -55°C to 150°C minimum

Performance Compatibility Parameters:

• Continuous Drain Current (Id): Equal to or greater than 5A
• Maximum Power Dissipation: Equal to or greater than 1.5W
• Rds On (Max): Equal to or lower than specified values
• Gate Charge (Qg): Equal to or lower than specified values
• Input Capacitance (Ciss): Equal to or lower than specified values

The AO8820 meets all mandatory matching parameters and exceeds performance specifications in drain current (7A versus 5A) and power dissipation capability. The device maintains identical voltage ratings, package configuration, and temperature operating range while providing improved on-resistance characteristics and reduced gate charge.

Parameter Comparison

Engineering Selection Recommendations

STC5NF20V Status Consideration: The STC5NF20V is classified as obsolete. New designs and procurement for existing applications should transition to active alternatives. The AO8820 is an active product with confirmed inventory availability (120,300 pieces in stock versus 41,094 for the STC5NF20V).

Compliance and Regulatory Alignment: Both the STC5NF20V and AO8820 maintain identical regulatory compliance profiles:

• ROHS3 Compliant
• REACH Unaffected
• Moisture Sensitivity Level 1 (Unlimited)
• ECCN: EAR99
• HTSUS: 8541.29.0095

Performance Characteristics: The AO8820 provides enhanced electrical performance relative to the STC5NF20V across multiple parameters. The substitute device delivers 40% higher continuous drain current (7A versus 5A), lower on-resistance (21 mOhm versus 40 mOhm at comparable conditions), and reduced gate charge (9 nC versus 11.5 nC). These improvements result in lower power dissipation during switching operations and reduced gate drive requirements.

Package and Thermal Compatibility: Both devices utilize identical 8-TSSOP surface mount packaging (0.173" width, 4.40mm) with matching thermal and mechanical characteristics. PCB layout modifications are not required for substitution.

Gate Threshold Voltage Consideration: The AO8820 exhibits a higher gate threshold voltage (1.1V versus 600mV). This parameter difference does not preclude substitution in logic-level gate applications where gate drive voltages are typically 3.3V to 5V, as both devices remain fully enhanced at standard logic levels.

Frequently Asked Questions (FAQ)

Q: Can the AO8820 directly replace the STC5NF20V in existing PCB designs?

A: Yes. Both devices share identical 8-TSSOP package dimensions and pinout configuration. No PCB layout modifications are required. The AO8820 provides equivalent or superior electrical performance across all critical parameters.

Q: What is the primary reason for substitution?

A: The STC5NF20V is classified as obsolete. The AO8820 is an active product with confirmed long-term availability, making it suitable for new designs and ongoing production requirements.

Q: Are there any gate drive circuit modifications needed when switching from STC5NF20V to AO8820?

A: No modifications are required for standard logic-level gate drive circuits. Both devices are specified as logic-level gate MOSFETs and operate with identical gate drive voltage ranges (3.3V to 5V typical). The higher gate threshold voltage of the AO8820 (1.1V versus 600mV) does not affect operation in these standard drive configurations.

Q: How do the on-resistance specifications compare?

A: The AO8820 specifies 21 mOhm at 7A and 10V gate voltage, while the STC5NF20V specifies 40 mOhm at 2.5A and 4.5V gate voltage. The AO8820 demonstrates lower on-resistance at higher current and gate voltage levels, resulting in reduced conduction losses.

Q: Is the AO8820 suitable for applications requiring the exact 5A current rating of the STC5NF20V?

A: Yes. The AO8820 is rated for 7A continuous drain current, which exceeds the 5A requirement of the STC5NF20V. Applications designed for 5A operation operate within the safe operating area of the substitute device with additional current margin.

Q: What is the impact of the different gate charge specifications?

A: The AO8820 exhibits lower gate charge (9 nC versus 11.5 nC), resulting in reduced gate drive power requirements and faster switching transitions. This improvement is beneficial for high-frequency switching applications and reduces thermal stress on gate drive circuits.

Q: Are both devices compliant with the same regulatory standards?

A: Yes. Both the STC5NF20V and AO8820 maintain identical compliance certifications: ROHS3 Compliant, REACH Unaffected, and Moisture Sensitivity Level 1 (Unlimited). No regulatory or environmental qualification changes are required for substitution.

Q: What is the inventory status difference between these devices?

A: The STC5NF20V has 41,094 pieces in stock (obsolete status), while the AO8820 has 120,300 pieces in stock (active status). The AO8820 provides superior long-term availability for production and procurement planning.