2N5486 Equivalent & Substitute Parts

Part Overview

The 2N5486 is an N-Channel JFET RF transistor manufactured by onsemi, housed in a TO-92 (TO-226-3) through-hole package. This device is rated for 25V operation with a maximum drain current of 30mA and is designed for RF applications. The 2N5486 is classified as obsolete, making identification of functionally equivalent substitute components necessary for ongoing design support, maintenance, and new production applications where through-hole or surface-mount alternatives are required.

Substiute Parts

2N5486

onsemiIn Stock: 212902N5486 Datasheet

Current PartRFQ

MMBF5486

onsemiIn Stock: 3600MMBF5486 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N5486 is determined by the following critical parameters:

Technology & Configuration: Both the main part and substitute must be N-Channel JFETs to maintain functional equivalence in RF circuit applications.

Voltage Rating: The substitute must support the rated voltage specification of 25V or higher to ensure safe operation within the original circuit design envelope.

Current Capability: The substitute must support the maximum drain current requirement of 30mA or higher to handle the intended load conditions.

Frequency Performance: RF application suitability is confirmed through frequency specification alignment.

The MMBF5486 meets these substitution criteria as an N-Channel JFET with 25V rated voltage and 20mA current capability, though it operates at a lower test voltage (15V) and includes specified frequency performance (400MHz). The primary difference is packaging: MMBF5486 is a surface-mount SOT-23-3 device versus the through-hole TO-92 package of the 2N5486.

Parameter Comparison

Engineering Selection Recommendations

For Direct Functional Replacement: The MMBF5486 provides electrical equivalence as an N-Channel JFET with matching 25V voltage rating and RF capability. Both devices are manufactured by onsemi and share the same base product lineage (MMBF54 series).

Product Status Consideration: The 2N5486 is obsolete, while the MMBF5486 is active production. For new designs or long-term production support, the MMBF5486 is the appropriate selection.

Compliance Status: The MMBF5486 is ROHS3 compliant, whereas the 2N5486 is RoHS non-compliant. Applications subject to RoHS requirements must use the MMBF5486.

Current Rating Differential: The MMBF5486 is rated for 20mA maximum drain current compared to 30mA for the 2N5486. Circuit designs operating at or near 30mA must be evaluated to confirm operation within the 20mA limit of the substitute.

Packaging Impact: Substitution requires PCB redesign if transitioning from through-hole (TO-92) to surface-mount (SOT-23-3) assembly. Pin configuration remains compatible (3-pin device), but board layout and assembly process differ significantly.

Frequently Asked Questions (FAQ)

Q: Can the MMBF5486 directly replace the 2N5486 in existing through-hole PCB designs?

A: Electrical substitution is valid, but physical replacement requires PCB modification. The MMBF5486 is a surface-mount SOT-23-3 package, while the 2N5486 uses a through-hole TO-92 package. Direct socket replacement is not possible without adapter hardware or PCB rework.

Q: What is the impact of the 20mA current rating on the MMBF5486 versus the 30mA rating of the 2N5486?

A: The MMBF5486 has a lower maximum drain current specification. Circuits designed to operate at drain currents exceeding 20mA will exceed the absolute maximum rating of the substitute. Circuit analysis is required to confirm operation within the 20mA limit.

Q: Are the pin configurations identical between these two devices?

A: Both devices are 3-pin JFETs with Gate, Drain, and Source terminals. Pin functional assignment is identical. Physical pin layout differs due to package type (TO-92 versus SOT-23-3).

Q: Why is the MMBF5486 specified with a 15V test voltage when the rated voltage is 25V?

A: The 15V specification is a test condition parameter, not a limiting specification. The 25V rated voltage is the absolute maximum voltage specification that applies to both devices.

Q: Is the MMBF5486 suitable for RF applications at the same frequency range as the 2N5486?

A: The MMBF5486 is specified for 400MHz RF operation. The 2N5486 does not include frequency specification in the provided data. Both are classified as RF JFETs. Application-specific frequency requirements must be evaluated against the 400MHz specification of the MMBF5486.

Q: What compliance advantages does the MMBF5486 offer?

A: The MMBF5486 is ROHS3 compliant, whereas the 2N5486 is RoHS non-compliant. For applications subject to RoHS directives or customer requirements, the MMBF5486 is the compliant option. Both devices are REACH unaffected and classified under ECCN EAR99.