CPH5541-TL-E Equivalent & Substitute Parts

Part Overview

The CPH5541-TL-E is a Bipolar (BJT) Transistor Array featuring NPN and PNP emitter-coupled configuration manufactured by onsemi. This surface mount device operates at maximum ratings of 40V (NPN) and 30V (PNP) collector-emitter breakdown voltage with a maximum collector current of 700mA and 600mW power dissipation. The device is currently classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity.

Substiute Parts

CPH5541-TL-E

onsemiIn Stock: 32080CPH5541-TL-E Datasheet

Current PartRFQ

CPH5520-TL-E

onsemiIn Stock: 12458CPH5520-TL-E Datasheet

MFR RecommendedRFQ

QSZ2TR

Rohm SemiconductorIn Stock: 3044QSZ2TR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CPH5541-TL-E is determined by compatibility across the following critical parameters:

Mandatory Compatibility Criteria:

• Transistor configuration: NPN, PNP emitter-coupled array
• Package type: SOT-23-5 Thin (TSOT-23-5) surface mount
• Mounting type: Surface mount
• Operating temperature range: 150°C (TJ) maximum
• Compliance: ROHS3 compliant, REACH unaffected

Functional Compatibility Parameters:

• Collector current rating (Ic Max): Equal to or greater than 700mA
• Collector-emitter breakdown voltage: Equal to or greater than 40V (NPN) and 30V (PNP)
• Power dissipation: Equal to or greater than 600mW
• DC current gain (hFE): Minimum 300 @ 50mA, 2V or equivalent performance
• Transition frequency: 540MHz or higher preferred for signal integrity

Substitute parts must maintain electrical performance within the specified operating envelope while preserving the same physical form factor and compliance certifications.

Parameter Comparison

Engineering Selection Recommendations

CPH5520-TL-E (onsemi) - Primary Substitute

The CPH5520-TL-E is an active product from the same manufacturer (onsemi) in the identical SOT-23-5 package. This substitute provides enhanced electrical performance with 2A maximum collector current (versus 700mA), 80V/50V breakdown voltage ratings (versus 40V/30V), and 1.2W power dissipation (versus 600mW). The device maintains ROHS3 compliance and MSL 1 rating. The CPH5520-TL-E is suitable for applications requiring higher current capacity and voltage headroom while maintaining the same physical footprint and thermal characteristics. Transition frequency of 420MHz is lower than the original 540MHz specification.

QSZ2TR (Rohm Semiconductor) - Alternative Substitute

The QSZ2TR is an active product from Rohm Semiconductor in the identical SOT-23-5 package configuration. This substitute provides 1.5A maximum collector current and 1.25W power dissipation with 30V breakdown voltage rating. The device maintains ROHS3 compliance and MSL 1 rating. The QSZ2TR is suitable for applications with moderate current requirements. Transition frequency of 300MHz/280MHz is lower than the original specification. Vce saturation characteristics are higher than the original device.

Both substitute parts maintain surface mount compatibility, operating temperature range, and regulatory compliance with the original CPH5541-TL-E.

Frequently Asked Questions (FAQ)

Q: Can the CPH5520-TL-E directly replace the CPH5541-TL-E in all applications?

A: The CPH5520-TL-E is physically compatible (same SOT-23-5 package) and electrically superior in current and voltage ratings. However, the transition frequency is reduced from 540MHz to 420MHz. Applications operating at frequencies near or above 420MHz require evaluation of this parameter change.

Q: What are the key differences between CPH5520-TL-E and QSZ2TR?

A: Both devices are in the same SOT-23-5 package and support the same operating temperature. The CPH5520-TL-E (onsemi) offers higher current capacity (2A versus 1.5A), higher voltage ratings (80V/50V versus 30V), and higher transition frequency (420MHz versus 300MHz/280MHz). The QSZ2TR has higher Vce saturation values. Selection depends on specific application current, voltage, and frequency requirements.

Q: Is the CPH5541-TL-E still available for procurement?

A: The CPH5541-TL-E is classified as obsolete. Substitute parts CPH5520-TL-E and QSZ2TR are both active products with current inventory availability.

Q: Are there any compliance or regulatory differences between the original and substitute parts?

A: All three devices (CPH5541-TL-E, CPH5520-TL-E, and QSZ2TR) are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. No compliance differences exist.

Q: What is the impact of lower transition frequency in substitute parts?

A: The CPH5541-TL-E operates at 540MHz transition frequency. The CPH5520-TL-E operates at 420MHz and the QSZ2TR at 300MHz/280MHz. Applications requiring high-frequency switching or signal amplification above these frequencies require evaluation of performance impact. Lower transition frequency may affect switching speed and high-frequency gain characteristics.

Q: Can both NPN and PNP transistors in the array be used simultaneously in the substitute parts?

A: Yes. Both the CPH5541-TL-E and substitute parts (CPH5520-TL-E and QSZ2TR) are emitter-coupled NPN/PNP arrays in the same 5-CPH/TSMT5 configuration, allowing simultaneous use of both transistor types within the same package.

Q: What is the significance of the SOT-23-5 Thin (TSOT-23-5) package designation?

A: The TSOT-23-5 designation indicates a thin profile variant of the standard SOT-23-5 package. All three devices use this identical package, ensuring mechanical and thermal compatibility in PCB layouts and thermal management designs.