ECH8502-TL-H Equivalent & Substitute Parts

Part Overview

The ECH8502-TL-H is a Bipolar (BJT) Transistor Array featuring integrated NPN and PNP transistor pairs rated for 100V/50V operation with 5A maximum collector current. Manufactured by onsemi in an 8-ECH surface mount package, this component is classified as obsolete product status. Due to its obsolete classification, locating equivalent or substitute components is necessary for ongoing design support, production continuity, and long-term availability assurance.

Substiute Parts

ECH8502-TL-H

onsemiIn Stock: 5873ECH8502-TL-H Datasheet

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CPH5524-TL-E

onsemiIn Stock: 21507CPH5524-TL-E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the ECH8502-TL-H is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Transistor configuration (NPN, PNP array structure)
• Maximum collector current rating (5A baseline)
• Collector-emitter breakdown voltage (100V/50V specification)
• DC current gain (hFE minimum 200 @ specified conditions)
• Operating temperature range (150°C maximum junction temperature)
• Surface mount technology compatibility

Mechanical Compatibility Criteria:

• Surface mount package format
• Pin configuration and lead type
• Moisture sensitivity level (MSL 1)

The CPH5524-TL-E qualifies as a substitute based on shared transistor array architecture (NPN/PNP configuration), surface mount technology, identical operating temperature maximum, and equivalent RoHS3 compliance. However, this substitute operates at reduced maximum ratings in collector current (3A versus 5A) and collector-emitter breakdown voltage (50V versus 100V/50V dual rating).

Parameter Comparison

Engineering Selection Recommendations

Primary Consideration: Product Status

The ECH8502-TL-H carries obsolete product status, making the CPH5524-TL-E the designated substitute from onsemi's active product portfolio. The CPH5524-TL-E maintains active production status, ensuring long-term availability and supply chain continuity.

Compliance Alignment

Both components maintain ROHS3 compliance and REACH unaffected status, satisfying regulatory requirements for equivalent substitution in compliant applications.

Electrical Derating Requirements

The CPH5524-TL-E operates at reduced maximum ratings compared to the ECH8502-TL-H:

• Collector current reduced from 5A to 3A
• Collector-emitter breakdown voltage reduced from 100V/50V to 50V
• Maximum power dissipation reduced from 1.6W to 1.2W
• Collector cutoff current increased from 100nA to 1µA

Applications requiring the full 5A current capability or 100V voltage rating cannot use the CPH5524-TL-E as a direct substitute.

Package Transition

The ECH8502-TL-H uses an 8-ECH flat lead package, while the CPH5524-TL-E uses SOT-23-5 thin package format. PCB layout and footprint modifications are required for physical substitution.

Frequently Asked Questions (FAQ)

Q: Can the CPH5524-TL-E directly replace the ECH8502-TL-H in all applications?

A: No. The CPH5524-TL-E operates at reduced maximum ratings. Applications requiring 5A collector current or 100V collector-emitter breakdown voltage cannot use this substitute. Verify your circuit's actual operating current and voltage requirements against the CPH5524-TL-E specifications before substitution.

Q: What is the primary reason for substitution?

A: The ECH8502-TL-H is classified as obsolete. The CPH5524-TL-E is the active equivalent from onsemi, ensuring continued availability and production support.

Q: Are there package compatibility issues?

A: Yes. The ECH8502-TL-H uses an 8-ECH flat lead surface mount package, while the CPH5524-TL-E uses SOT-23-5 thin package format. Different pin counts and lead configurations require PCB redesign and footprint modification.

Q: Do both parts meet the same regulatory standards?

A: Yes. Both components are ROHS3 compliant and REACH unaffected, maintaining equivalent regulatory compliance for substitution in compliant designs.

Q: What are the key electrical differences?

A: The CPH5524-TL-E has lower maximum ratings: 3A collector current (versus 5A), 50V breakdown voltage (versus 100V/50V), and 1.2W power dissipation (versus 1.6W). The CPH5524-TL-E features higher transition frequency (380MHz versus 290MHz) and higher collector cutoff current (1µA versus 100nA).

Q: Is the DC current gain equivalent?

A: Both parts specify minimum DC current gain of 200, but at different test conditions. The ECH8502-TL-H is rated at 500mA collector current, while the CPH5524-TL-E is rated at 100mA. Verify gain performance at your specific operating current.

Q: What is the saturation voltage difference?

A: The ECH8502-TL-H saturates at 120mV (@ 125mA, 2.5A), while the CPH5524-TL-E saturates at 240mV (@ 100mA, 2A). Higher saturation voltage in the substitute may affect switching speed and power efficiency in saturation-mode applications.