BF512,235 Equivalent & Substitute Parts Reference

Part Overview

The BF512,235 is an RF MOSFET JFET manufactured by NXP USA Inc., designed for RF applications operating at 100MHz with a 10V test voltage rating and 5mA test current. This component is packaged in SOT-23 (TO-236AB) surface mount configuration with a noise figure of 1.5dB.

The BF512,235 has reached obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this RF JFET technology.

Substiute Parts

BF512,235

NXP USA Inc.In Stock: 1039BF512,235 Datasheet

Current PartRFQ

2SK932-23-TB-E

onsemiIn Stock: 67002SK932-23-TB-E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BF512,235 is determined by the following critical parameters:

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

Package Compatibility: The substitute must use TO-236-3, SC-59, or SOT-23-3 surface mount packaging to ensure mechanical and electrical compatibility with existing PCB layouts.

Electrical Performance Envelope: The substitute must operate within compatible voltage and current ranges. The BF512,235 operates at 10V test voltage with 5mA test current and 30mA maximum current rating. Substitute parts must support these operational parameters or higher ratings to ensure circuit functionality.

Frequency Operation: RF JFET devices must support minimum 100MHz operation to maintain RF performance characteristics in the intended application.

Compliance & Availability: The substitute must maintain ROHS3 compliance and demonstrate active product status with confirmed inventory availability.

The 2SK932-23-TB-E meets these substitution criteria through matching N-Channel JFET technology, identical SOT-23-3 packaging, higher current rating (50mA), compatible voltage rating (15V Vdss), and active product status with substantial inventory.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: 2SK932-23-TB-E

The 2SK932-23-TB-E is the manufacturer-recommended substitute for the BF512,235. This selection is based on the following engineering criteria:

Technology Alignment: Both devices are N-Channel JFET transistors, ensuring functional equivalence in RF circuit topologies.

Package Compatibility: Identical SOT-23-3 surface mount packaging eliminates PCB redesign requirements and maintains pin-to-pin compatibility.

Electrical Performance: The 2SK932-23-TB-E provides higher current rating (50mA versus 30mA) and higher voltage rating (15V Vdss versus 10V test voltage), offering improved operational margins within the same circuit design.

Compliance Status: Both parts maintain ROHS3 compliance and MSL Level 1 (Unlimited) moisture sensitivity rating, ensuring compatibility with standard manufacturing and storage protocols.

Supply Availability: The 2SK932-23-TB-E maintains active product status with 6636 pieces in current inventory, compared to the obsolete BF512,235 status. This ensures long-term supply chain continuity and production support.

Regulatory Alignment: Both parts carry identical ECCN (EAR99) and HTSUS (8541.21.0095) classifications, maintaining regulatory consistency in procurement and export documentation.

Frequently Asked Questions (FAQ)

Q: Can the 2SK932-23-TB-E directly replace the BF512,235 without circuit modification?

A: Yes. Both devices share identical SOT-23-3 packaging and N-Channel JFET configuration. Pin-to-pin compatibility is maintained. The 2SK932-23-TB-E provides higher current and voltage ratings, which operate within the design envelope of circuits specified for the BF512,235.

Q: What are the key differences between these two parts?

A: The primary differences are product status (obsolete versus active), current rating (30mA versus 50mA), voltage rating (10V test versus 15V Vdss), and manufacturer (NXP versus onsemi). The 2SK932-23-TB-E offers superior electrical performance margins while maintaining functional equivalence.

Q: Are there packaging differences that affect PCB assembly?

A: No. Both parts use identical TO-236-3 / SOT-23-3 surface mount packaging. Existing PCB layouts, solder paste stencils, and pick-and-place machine programming require no modification.

Q: Does the substitute part maintain the same noise figure specification?

A: The noise figure specification (1.5dB) is provided only for the BF512,235. The 2SK932-23-TB-E datasheet does not specify noise figure in the provided parameters. Circuit performance validation is required if noise figure is a critical design parameter.

Q: Are both parts RoHS compliant?

A: Yes. Both the BF512,235 and 2SK932-23-TB-E are ROHS3 compliant with MSL Level 1 (Unlimited) moisture sensitivity rating.

Q: What is the operating temperature range for the substitute?

A: The 2SK932-23-TB-E operates to a maximum junction temperature (TJ) of 150°C. Operating temperature range specifications for the BF512,235 are not provided in the input parameters.