ECH8501-TL-H Equivalent & Substitute Parts

Part Overview

The ECH8501-TL-H is a Bipolar (BJT) Transistor Array featuring integrated NPN and PNP transistors manufactured by onsemi. This surface mount component is rated for 30V collector-emitter breakdown voltage with a maximum collector current of 5A and operates at frequencies up to 280MHz. The device is classified as obsolete, necessitating identification of active alternative components that maintain functional compatibility within specified electrical parameters.

Substiute Parts

ECH8501-TL-H

onsemiIn Stock: 771ECH8501-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 obsolete ECH8501-TL-H requires identification of active components that satisfy the following critical electrical parameters:

Mandatory Compatibility Criteria:

• Transistor configuration: NPN and PNP array topology
• Collector current rating: minimum 5A capability
• Collector-emitter breakdown voltage: minimum 30V rating
• Surface mount technology
• RoHS3 compliance
• MSL Level 1 classification

The CPH5524-TL-E is identified as a substitute based on its active product status and compliance with RoHS3 and MSL requirements. However, this substitute exhibits reduced maximum collector current (3A versus 5A) and lower maximum power dissipation (1.2W versus 1.6W), indicating application-dependent suitability.

Parameter Comparison

Engineering Selection Recommendations

ECH8501-TL-H Status: This component is classified as obsolete. Continued procurement is limited to existing inventory. New designs and production transitions require alternative component selection.

CPH5524-TL-E Suitability: The CPH5524-TL-E is an active product from the same manufacturer with full RoHS3 compliance and MSL Level 1 rating, ensuring regulatory and environmental compatibility. Both components meet the 150°C operating temperature requirement and maintain equivalent DC current gain specifications at their respective test conditions.

Critical Differences: The CPH5524-TL-E exhibits reduced maximum collector current (3A) and maximum power dissipation (1.2W) compared to the ECH8501-TL-H. Applications requiring sustained operation at collector currents exceeding 3A or power dissipation above 1.2W cannot use this substitute without circuit redesign. The CPH5524-TL-E features higher collector-emitter breakdown voltage (50V) and transition frequency (380MHz), providing enhanced performance margins in these parameters.

Package Consideration: The ECH8501-TL-H uses an 8-SMD flat lead package, while the CPH5524-TL-E uses SOT-23-5 packaging. PCB layout modification is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can the CPH5524-TL-E directly replace the ECH8501-TL-H in all applications?

A: No. The CPH5524-TL-E has a maximum collector current of 3A compared to 5A for the ECH8501-TL-H. Applications operating at collector currents between 3A and 5A require circuit redesign or alternative component selection.

Q: What are the package differences between these components?

A: The ECH8501-TL-H uses an 8-SMD flat lead package, while the CPH5524-TL-E uses SOT-23-5 thin packaging. These are physically incompatible, requiring PCB redesign for substitution.

Q: Are both components RoHS3 compliant?

A: Yes. Both the ECH8501-TL-H and CPH5524-TL-E are RoHS3 compliant with MSL Level 1 rating, meeting current environmental and regulatory requirements.

Q: How do the saturation voltage characteristics compare?

A: The ECH8501-TL-H exhibits 110mV saturation voltage at 125mA base current and 2.5A collector current, while the CPH5524-TL-E exhibits 240mV saturation voltage at 100mA base current and 2A collector current. The higher saturation voltage of the CPH5524-TL-E may affect switching performance in saturation-mode applications.

Q: What is the significance of the emitter-coupled configuration in the CPH5524-TL-E?

A: The CPH5524-TL-E features an emitter-coupled NPN/PNP configuration, which differs from the standard configuration of the ECH8501-TL-H. This architectural difference affects internal biasing and may influence circuit behavior in specific applications.

Q: Can I use the CPH5524-TL-E in applications requiring 5A collector current?

A: No. The CPH5524-TL-E is rated for a maximum collector current of 3A. Exceeding this rating violates component specifications and may result in device failure.

Q: Are there inventory considerations for these components?

A: The ECH8501-TL-H is obsolete with limited remaining inventory (744 pieces). The CPH5524-TL-E is an active product with significantly higher inventory availability (21,400 pieces), ensuring long-term supply continuity.