BC817-40QB-QZ Equivalent & Substitute Parts

Part Overview

The BC817-40QB-QZ is an NPN small-signal bipolar junction transistor manufactured by Nexperia USA Inc. in a 3-XDFN exposed pad surface mount package with wettable flank design. This device is rated for 45 V collector-emitter breakdown voltage, 500 mA maximum collector current, and 350 mW power dissipation, with a transition frequency of 100 MHz. The part carries AEC-Q101 automotive qualification and is RoHS3 compliant with MSL 1 moisture sensitivity rating. Identification of equivalent and substitute parts is necessary to ensure design flexibility, manage supply chain continuity, and maintain performance specifications across manufacturing lots and procurement cycles.

Substiute Parts

BC817-40QB-QZ

Nexperia USA Inc.In Stock: 5491BC817-40QB-QZ Datasheet

Current PartRFQ

BC817-40QBZ

Nexperia USA Inc.In Stock: 29291BC817-40QBZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BC817-40QB-QZ is determined by electrical and mechanical parameter equivalence. The critical parameters that define substitutability are:

• Transistor Type: NPN configuration
• Voltage Rating: 45 V collector-emitter breakdown voltage
• Current Rating: 500 mA maximum collector current
• Power Dissipation: 350 mW maximum
• Frequency Response: 100 MHz transition frequency
• DC Current Gain: 250 minimum at specified bias conditions
• Saturation Characteristics: 700 mV maximum at rated conditions
• Package Specification: 3-XDFN exposed pad with wettable flank
• Mounting Technology: Surface mount configuration
• Compliance: AEC-Q101 automotive qualification, RoHS3 compliance, MSL 1 rating

The BC817-40QBZ is a parametric equivalent that maintains all electrical specifications and package requirements identical to the BC817-40QB-QZ. Both parts are manufactured by Nexperia USA Inc. and share the same base product number BC817, differing only in suffix designation and internal qualification tracking.

Parameter Comparison

Engineering Selection Recommendations

Both the BC817-40QB-QZ and BC817-40QBZ are active production parts from Nexperia USA Inc. with identical electrical and mechanical specifications. Selection between these parts is based on availability and procurement requirements rather than technical differentiation.

The BC817-40QB-QZ carries automotive-grade qualification under AEC-Q101 and maintains full RoHS3 compliance with MSL 1 moisture sensitivity rating, suitable for automotive and industrial applications requiring high reliability standards.

The BC817-40QBZ provides equivalent performance with identical parametric ratings and package specifications. Both parts are suitable for direct substitution in applications requiring NPN small-signal transistors with 45 V breakdown voltage, 500 mA collector current capability, and 100 MHz transition frequency in surface mount DFN packaging.

Selection should be based on supply chain availability, inventory levels, and procurement lead times. No performance degradation or functional compromise occurs when substituting between these parts.

Frequently Asked Questions (FAQ)

Q: Can BC817-40QBZ be used as a direct replacement for BC817-40QB-QZ?

A: Yes. The BC817-40QBZ is a parametric equivalent with identical electrical specifications, package configuration, and compliance certifications. Direct substitution is supported without circuit modification.

Q: Are there differences in the package or mounting requirements?

A: No. Both parts use the 3-XDFN exposed pad package with wettable flank design and identical DFN1110D-3 supplier device package designation. Mounting requirements, PCB footprints, and reflow profiles are identical.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both BC817-40QB-QZ and BC817-40QBZ carry AEC-Q101 automotive qualification and are suitable for automotive applications requiring high reliability standards.

Q: What is the significance of the suffix difference between QB-QZ and QBZ?

A: The suffix designations reflect internal Nexperia qualification and tracking codes. Both parts meet identical electrical and mechanical specifications and are functionally interchangeable.

Q: Are there any compliance or regulatory differences?

A: No. Both parts are RoHS3 compliant, REACH unaffected, and carry MSL 1 moisture sensitivity rating. Regulatory and environmental compliance is identical.

Q: What inventory levels are available for each part?

A: BC817-40QB-QZ has 5,469 pieces in stock. BC817-40QBZ has 29,184 pieces in stock. Availability should be confirmed with the supplier for current procurement requirements.

Q: Can these parts be used interchangeably in existing designs?

A: Yes. No design changes, circuit modifications, or validation testing are required when substituting between BC817-40QB-QZ and BC817-40QBZ. Both parts are pin-compatible and electrically equivalent.