BC856W/ZLX Equivalent & Substitute Parts

Part Overview

The BC856W/ZLX is a bipolar junction transistor (BJT) manufactured by NXP USA Inc. in the SOT-323 surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for ongoing design requirements and procurement needs. The BC856W/ZLX maintains ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), making it suitable for industrial and commercial applications.

Substiute Parts

BC856W/ZLX

NXP USA Inc.In Stock: 986BC856W/ZLX Datasheet

Current PartRFQ

BC856W,115

Nexperia USA Inc.In Stock: 20471BC856W,115 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the obsolete BC856W/ZLX is based on alignment of the following critical parameters:

Electrical Characteristics:

• Transistor Type: PNP configuration
• Collector-Emitter Breakdown Voltage (Max): 65 V
• Collector Current (Max): 100 mA
• Power Dissipation (Max): 200 mW
• Transition Frequency: 100 MHz
• DC Current Gain (hFE): 125 (minimum @ 2mA, 5V)

Physical & Environmental Compliance:

• Package Type: SOT-323 (SC-70)
• Mounting: Surface Mount
• RoHS3 Compliance
• MSL Rating: 1 (Unlimited)
• REACH Status: Unaffected
• Operating Temperature: 150°C (TJ)

Regulatory & Quality Standards:

• ECCN: EAR99
• HTSUS: 8541.21.0075
• Automotive Grade qualification (AEC-Q101)

The substitute part BC856W,115 maintains electrical equivalence across all specified parameters while offering active product status and verified availability.

Parameter Comparison

Engineering Selection Recommendations

The BC856W,115 manufactured by Nexperia USA Inc. is the direct equivalent for the obsolete BC856W/ZLX. Selection of this substitute is based on the following engineering criteria:

Product Status Alignment: The BC856W,115 holds active product status, ensuring continued availability and supply chain reliability. The obsolete status of the BC856W/ZLX creates procurement risk and necessitates transition to an active equivalent.

Electrical Parameter Equivalence: All critical electrical specifications align between the main part and substitute: PNP transistor type, 100 mA maximum collector current, 65 V collector-emitter breakdown voltage, 200 mW power dissipation, and 100 MHz transition frequency. These parameters ensure functional compatibility in existing circuit designs.

Compliance & Certification: Both parts maintain ROHS3 compliance, unlimited MSL rating (1), REACH unaffected status, and identical ECCN/HTSUS classifications. The substitute part carries automotive-grade qualification (AEC-Q101), providing enhanced reliability assurance for mission-critical applications.

Package & Mounting Compatibility: The SOT-323 (SC-70) surface mount package is identical between both parts, enabling direct PCB layout compatibility without redesign requirements.

Frequently Asked Questions (FAQ)

Q: Can BC856W,115 be used as a direct replacement for BC856W/ZLX in existing designs?

A: Yes. The BC856W,115 is electrically and mechanically equivalent to the BC856W/ZLX across all specified parameters. The identical SOT-323 package and matching electrical characteristics enable direct substitution without circuit modification.

Q: What is the primary reason for substituting the BC856W/ZLX?

A: The BC856W/ZLX is classified as obsolete, creating supply chain discontinuity. The BC856W,115 maintains active product status with verified inventory availability, ensuring long-term procurement viability.

Q: Are there compliance differences between the two parts?

A: No. Both parts maintain identical compliance profiles: ROHS3 compliant, MSL 1 (unlimited), REACH unaffected, and EAR99 ECCN classification. The substitute part includes automotive-grade qualification (AEC-Q101), which represents an enhancement rather than a deviation.

Q: Does the SOT-323 package remain the same for both parts?

A: Yes. Both the BC856W/ZLX and BC856W,115 utilize the SOT-323 (SC-70) surface mount package. No PCB layout modifications are required for substitution.

Q: What are the key electrical parameters that define substitution compatibility?

A: Substitution compatibility is determined by matching transistor type (PNP), collector current rating (100 mA maximum), collector-emitter breakdown voltage (65 V maximum), power dissipation (200 mW maximum), and transition frequency (100 MHz). The BC856W,115 meets all these specifications.

Q: Is the BC856W,115 suitable for automotive applications?

A: Yes. The BC856W,115 carries automotive-grade classification with AEC-Q101 qualification, making it suitable for automotive and mission-critical industrial applications requiring enhanced reliability standards.

Q: What is the moisture sensitivity level for the substitute part?

A: The BC856W,115 maintains MSL 1 (unlimited), indicating no moisture sensitivity restrictions. Standard handling procedures apply without special moisture control requirements.