BSP51-QX Equivalent & Substitute Parts

Part Overview

The BSP51-QX is an NPN Darlington bipolar junction transistor manufactured by Nexperia USA Inc., designed for surface mount applications in the SOT-223 package. This component operates at a maximum collector current of 1 A, collector-emitter breakdown voltage of 60 V, and maximum power dissipation of 1.25 W. The BSP51-QX is classified as an active product with automotive-grade qualification under AEC-Q101 standards. Substitute parts are identified when equivalent electrical characteristics, mechanical compatibility, and compliance certifications align with the original specification, enabling direct replacement in circuit designs without functional degradation.

Substiute Parts

BSP51-QX

Nexperia USA Inc.In Stock: 1116BSP51-QX Datasheet

Current PartRFQ

BSP51,115

Nexperia USA Inc.In Stock: 2181BSP51,115 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the BSP51-QX is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part BSP51,115 qualifies as a parametric equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Identical transistor type classification (NPN - Darlington)
• Matching maximum collector current (1 A)
• Identical collector-emitter breakdown voltage (60 V)
• Identical saturation voltage specification (1.3V @ 500µA, 500mA)
• Matching collector cutoff current (50nA)
• Identical DC current gain minimum (2000 @ 500mA, 10V)
• Identical maximum power dissipation (1.25 W)
• Identical transition frequency (200MHz)
• Identical maximum operating junction temperature (150°C)

Mechanical & Packaging Equivalence:

• Identical mounting type (Surface Mount)
• Identical package designation (TO-261-4, TO-261AA)
• Identical supplier device package (SOT-223)

Compliance & Certification Equivalence:

• Identical automotive grade classification
• Identical AEC-Q101 qualification
• Identical RoHS3 compliance status
• Identical REACH status (REACH Unaffected)

Parameter Comparison

Engineering Selection Recommendations

The BSP51,115 is a direct parametric equivalent to the BSP51-QX and qualifies for substitution in all applications where the original part is specified. Both components are manufactured by Nexperia USA Inc. and maintain identical electrical performance characteristics across all rated parameters.

Substitution Basis:

Both parts carry active product status, ensuring continued availability and manufacturing support. Both components meet automotive-grade requirements with AEC-Q101 qualification, making them suitable for automotive and industrial applications requiring reliability certification. Both parts comply with ROHS3 environmental standards and maintain REACH unaffected status, satisfying regulatory requirements for restricted substance compliance.

The identical SOT-223 surface mount package ensures mechanical and thermal compatibility on existing printed circuit board layouts without requiring design modifications. Pin configuration, thermal characteristics, and mounting footprint remain unchanged between the two parts.

No derating or performance adjustment is required when substituting BSP51,115 for BSP51-QX. The parts are functionally interchangeable at the circuit level.

Frequently Asked Questions (FAQ)

Q: Can BSP51,115 be used as a direct replacement for BSP51-QX in production?

A: Yes. The BSP51,115 is a parametric equivalent with identical electrical specifications, package configuration, and compliance certifications. Direct substitution is supported without circuit redesign or performance degradation.

Q: Are there any differences in the SOT-223 package between these parts?

A: No. Both parts use the identical SOT-223 surface mount package with TO-261-4 and TO-261AA case designations. Pin assignments, lead spacing, and thermal characteristics are identical.

Q: Do both parts meet automotive qualification requirements?

A: Yes. Both BSP51-QX and BSP51,115 carry automotive-grade classification with AEC-Q101 qualification. They are suitable for automotive applications requiring certified component reliability.

Q: What is the difference between BSP51-QX and BSP51,115 part numbering?

A: The BSP51,115 is a variant designation of the base product number BSP51. Both designations refer to the same electrical and mechanical specifications. The BSP51-QX uses a different suffix convention but maintains identical parametric characteristics.

Q: Are environmental compliance certifications identical?

A: Yes. Both parts are ROHS3 compliant and REACH unaffected. They meet identical environmental and regulatory requirements for restricted substance usage.

Q: Can these parts be mixed in the same production batch?

A: Yes. Since the parts are parametric equivalents with identical specifications and compliance certifications, they can be used interchangeably within the same design and production environment.

Q: What is the maximum collector current for both parts?

A: Both parts support a maximum collector current of 1 A with a maximum collector-emitter breakdown voltage of 60 V.

Q: Are there inventory considerations when selecting between these parts?

A: Both parts are active products with current inventory availability. Selection between BSP51-QX and BSP51,115 can be based on supply chain availability and lead time requirements without affecting circuit performance.