BSP19AT1 Equivalent & Substitute Parts

Part Overview

The BSP19AT1 is an NPN bipolar junction transistor manufactured by onsemi, rated for 1A collector current at 350V collector-emitter breakdown voltage in a SOT223 surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The obsolete status of the BSP19AT1 requires sourcing from alternative manufacturers offering functionally compatible devices.

Substiute Parts

BSP19AT1

onsemiIn Stock: 1721BSP19AT1 Datasheet

Current PartRFQ

BSP19,115

Nexperia USA Inc.In Stock: 2249BSP19,115 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the BSP19AT1 is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor type: NPN configuration
• Voltage rating: Collector-emitter breakdown voltage of 350V
• Current capability: Minimum 100mA collector current (BSP19AT1 rated 1A; substitute rated 100mA represents reduced current capacity)
• Package type: SOT223 surface mount package

Compliance Considerations:

• Product status transition from obsolete to active
• RoHS compliance status
• Moisture sensitivity level maintained at MSL 1

The BSP19,115 from Nexperia USA Inc. meets the core electrical parameters (NPN type, 350V breakdown voltage, SOT223 package) and maintains MSL 1 rating. However, the substitute operates at 100mA maximum collector current compared to the original 1A specification, representing a significant current derating that must be evaluated for specific application requirements.

Parameter Comparison

Engineering Selection Recommendations

BSP19,115 Substitution Applicability:

The BSP19,115 is an active product from Nexperia USA Inc. with ROHS3 compliance, addressing the obsolescence of the BSP19AT1. Both devices share identical voltage ratings (350V) and package configuration (SOT223). The substitute maintains MSL 1 moisture sensitivity classification and REACH unaffected status.

Critical Limitation:

The BSP19,115 maximum collector current rating of 100mA represents a 90% reduction from the BSP19AT1 specification of 1A. This current derating is a fundamental electrical difference that restricts substitution to applications operating within the 100mA maximum collector current envelope. Applications requiring the full 1A current capacity of the original BSP19AT1 cannot use the BSP19,115 as a direct substitute.

Compliance Advantage:

The transition from RoHS non-compliant (BSP19AT1) to ROHS3 compliant (BSP19,115) provides regulatory alignment for new designs and manufacturing environments with RoHS requirements.

Frequently Asked Questions (FAQ)

Q: Can the BSP19,115 directly replace the BSP19AT1 in all applications?

A: No. While both devices share 350V voltage rating and SOT223 packaging, the BSP19,115 is rated for maximum 100mA collector current versus the BSP19AT1 at 1A. Substitution is valid only for applications operating at or below 100mA collector current.

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

A: Substitution compatibility is determined by: (1) NPN transistor type, (2) 350V collector-emitter breakdown voltage, (3) SOT223 surface mount package, and (4) collector current requirements. The substitute must meet or exceed the application's current demand within the 100mA maximum rating.

Q: Does the BSP19,115 require different PCB layout or thermal management compared to the BSP19AT1?

A: Both devices use identical SOT223 packaging and MSL 1 moisture sensitivity, requiring no changes to PCB layout or assembly processes. Thermal management differences are not specified in the provided parameters.

Q: What is the compliance status difference between these parts?

A: The BSP19AT1 is RoHS non-compliant and obsolete. The BSP19,115 is ROHS3 compliant and active. Both maintain REACH unaffected status and MSL 1 moisture sensitivity.

Q: Are there packaging format options for the BSP19,115?

A: The BSP19,115 is available in Cut Tape (CT) and Digi-Reel® packaging formats, both in SOT223 supplier device package configuration.

Q: What should be verified before implementing the BSP19,115 as a substitute?

A: Application collector current requirements must not exceed 100mA maximum. The reduced current capacity relative to the original 1A specification is the primary substitution constraint.