FDS8960C Equivalent & Substitute Parts

Part Overview

The FDS8960C is an N and P-Channel MOSFET array manufactured by onsemi, designed for surface mount applications in the 8-SOIC package. This dual-channel device operates at 35V with continuous drain currents of 7A (N-channel) and 5A (P-channel), delivering 900mW maximum power dissipation. The device features Logic Level Gate operation and is part of the PowerTrench® series.

The FDS8960C is classified as Obsolete, making identification of functionally equivalent alternatives necessary for ongoing design support, production continuity, and component sourcing. Substitute parts must maintain compatibility across electrical performance, thermal characteristics, and physical packaging to ensure direct replacement capability.

Substiute Parts

FDS8960C

onsemiIn Stock: 80417FDS8960C Datasheet

Current PartRFQ

FDS4897C

onsemiIn Stock: 23008FDS4897C Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the FDS8960C is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Drain to Source Voltage (Vdss) must equal or exceed 35V
• Continuous drain current ratings must support or exceed 7A (N-channel) and 5A (P-channel) specifications
• On-state resistance (Rds On) must not exceed the specified maximum to maintain thermal performance
• Gate threshold voltage must remain within Logic Level Gate specifications
• Gate charge and input capacitance must be compatible with existing gate drive circuitry

Physical Compatibility Requirements:

• Package type must be 8-SOIC with identical pin configuration
• Mounting type must be Surface Mount
• Device must maintain N and P-Channel dual configuration

Operational Compatibility Requirements:

• Operating temperature range must encompass -55°C to 150°C
• Maximum power dissipation must support 900mW thermal budget

The FDS4897C qualifies as a substitute based on these parameters. While it features a higher Vdss rating (40V) and comparable current ratings, it maintains the same package, configuration, and operating temperature range. The increased gate charge and input capacitance require verification against specific circuit design parameters but do not preclude substitution in applications with adequate gate drive capability.

Parameter Comparison

Engineering Selection Recommendations

FDS4897C as Primary Substitute:

The FDS4897C is the qualified substitute for the FDS8960C based on the following engineering criteria:

Electrical Performance: The FDS4897C maintains the same Logic Level Gate configuration and operating temperature range. The 40V Vdss rating provides additional voltage margin over the original 35V specification. Continuous drain current ratings of 6.2A (N-channel) and 4.4A (P-channel) are slightly lower than the FDS8960C but remain within acceptable operating parameters for most applications designed around the original device.

Thermal Characteristics: Both devices share identical 900mW maximum power dissipation ratings and the same 8-SOIC package geometry, ensuring equivalent thermal performance and PCB layout compatibility.

Regulatory and Compliance Status: The FDS4897C carries RoHS3 compliance certification, whereas the FDS8960C compliance status is not specified. Both devices maintain REACH Unaffected status and identical ECCN and HTSUS classifications, ensuring regulatory equivalence.

Product Lifecycle Considerations: The FDS8960C is classified as Obsolete, while the FDS4897C is designated Last Time Buy. This status differential indicates extended availability of the substitute part, supporting long-term production continuity and component sourcing stability.

Gate Drive Circuit Considerations: The FDS4897C exhibits increased gate charge (20nC @ 10V versus 7.7nC @ 5V) and input capacitance (760pF @ 20V versus 570pF @ 15V). Existing gate drive circuits must provide sufficient current and switching speed to accommodate these increased capacitive loads without degrading system performance.

Frequently Asked Questions (FAQ)

Q: Can the FDS4897C directly replace the FDS8960C in existing PCB designs?

A: Yes, the FDS4897C is pin-compatible and maintains the same 8-SOIC package footprint. No PCB layout modifications are required. However, gate drive circuit performance must be evaluated to ensure adequate drive capability for the increased gate charge specification.

Q: What is the significance of the higher Vdss rating (40V) on the FDS4897C?

A: The 40V Vdss rating on the FDS4897C provides additional voltage margin compared to the 35V specification of the FDS8960C. This higher rating does not negatively impact performance in applications operating at or below 35V and may provide enhanced reliability in circuits with transient voltage spikes.

Q: Are there differences in continuous drain current ratings between these devices?

A: Yes. The FDS8960C provides 7A (N-channel) and 5A (P-channel), while the FDS4897C provides 6.2A (N-channel) and 4.4A (P-channel). Applications requiring the full current capacity of the FDS8960C must evaluate whether the reduced ratings of the FDS4897C are acceptable for the specific circuit design.

Q: How do the gate charge differences affect circuit design?

A: The FDS4897C exhibits higher gate charge (20nC @ 10V) compared to the FDS8960C (7.7nC @ 5V). This increased charge requires gate drive circuits to supply higher current or longer switching times to achieve equivalent switching speeds. Existing gate drive designs must be analyzed to confirm adequate performance.

Q: What is the difference between Obsolete and Last Time Buy product status?

A: Obsolete status indicates the FDS8960C is no longer manufactured and existing inventory is depleted. Last Time Buy status for the FDS4897C indicates the manufacturer will accept orders for a limited time before discontinuing production. This status difference supports the use of FDS4897C for long-term design continuity.

Q: Are both devices RoHS compliant?

A: The FDS4897C is explicitly RoHS3 compliant. The FDS8960C compliance status is not specified in the provided data. Both devices maintain REACH Unaffected status, indicating no regulatory restrictions under REACH regulations.

Q: Can the FDS4897C be used in high-temperature applications?

A: Yes, the FDS4897C maintains the same operating temperature range as the FDS8960C (-55°C to 150°C junction temperature), ensuring equivalent thermal performance across the full operating envelope.

Q: What packaging options are available for the FDS4897C?

A: The FDS4897C is available in Cut Tape (CT) and Digi-Reel® packaging formats, providing flexibility for both prototype and production volume requirements.