2N5638RLRAG Equivalent & Substitute Parts

Part Overview

The 2N5638RLRAG is an N-Channel JFET transistor rated for 35 V breakdown voltage and 30 V drain-to-source voltage, designed for through-hole applications in the TO-92 package. With a maximum power dissipation of 310 mW and drain current of 50 mA at 20 V, this device is suitable for general-purpose switching and amplification circuits. The part is currently obsolete, making equivalent substitutes necessary for new designs and component sourcing.

Substiute Parts

2N5638RLRAG

onsemiIn Stock: 7512N5638RLRAG Datasheet

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BF256B

onsemiIn Stock: 39931BF256B Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the 2N5638RLRAG is determined by the following critical parameters:

• Device Type: N-Channel JFET configuration
• Voltage Rating: Drain-to-source voltage (Vdss) of 30 V or higher
• Current Capability: Drain current (Idss) of 50 mA or higher at specified conditions
• Package Compatibility: TO-92-3 through-hole package for direct pin-compatible replacement
• Thermal Performance: Power dissipation capability of 310 mW or greater
• Operating Temperature Range: -65°C to 150°C or equivalent

The BF256B qualifies as a substitute based on matching N-Channel JFET technology, 30 V voltage rating, compatible TO-92-3 package, and active product status with current availability.

Parameter Comparison

Engineering Selection Recommendations

The BF256B is an active substitute for the obsolete 2N5638RLRAG. Both devices share N-Channel JFET technology, 30 V voltage rating, and TO-92-3 package compatibility, enabling direct pin-for-pin replacement in through-hole applications.

Key considerations for selection:

• Product Availability: BF256B is in active production with 39,915 units in stock, compared to the obsolete 2N5638RLRAG with limited remaining inventory of 655 units.
• Compliance: Both parts maintain REACH Unaffected status and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring equivalent environmental and regulatory compliance.
• Current Rating Difference: The BF256B has a lower drain current rating of 13 mA compared to the 2N5638RLRAG at 50 mA. Circuit designs must verify that the lower current capability is acceptable for the intended application.
• RoHS Status: BF256B is RoHS3 compliant, supporting modern manufacturing and environmental standards.

Frequently Asked Questions (FAQ)

Q: Can the BF256B directly replace the 2N5638RLRAG in existing designs?

A: Pin-for-pin replacement is possible due to identical TO-92-3 package configuration. However, the BF256B's lower drain current rating (13 mA vs. 50 mA) must be verified against circuit requirements before implementation.

Q: What is the primary reason for substitution?

A: The 2N5638RLRAG is obsolete. The BF256B provides an active, readily available alternative with matching voltage ratings and package type.

Q: Are there compliance differences between the two parts?

A: Both parts maintain equivalent REACH and MSL ratings. The BF256B adds RoHS3 compliance, which may be required for new designs depending on application and regional regulations.

Q: How do the electrical characteristics compare?

A: Both devices are N-Channel JFETs with 30 V drain-to-source voltage ratings and TO-92-3 packages. The primary difference is drain current capability: 2N5638RLRAG at 50 mA versus BF256B at 13 mA. Applications requiring higher current must evaluate alternative substitutes or circuit modifications.

Q: Is the TO-92-3 package identical between both parts?

A: Both use TO-92-3 (TO-226) package variants. Verify lead spacing and body dimensions with the respective datasheets to confirm mechanical compatibility in your specific PCB layout.