CPDQR24V-HF Equivalent & Substitute Parts

Part Overview

The CPDQR24V-HF is a 24V Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This part features a 47V clamping voltage, 1A peak pulse current (8/20µs), and is packaged in the 0402 (1006 Metric) form factor with SOD-923F supplier packaging. The product is designated as Last Time Buy, indicating end-of-life status. Equivalent and substitute parts are necessary to ensure design continuity and maintain supply chain flexibility for applications requiring comparable transient voltage suppression characteristics.

Substiute Parts

CPDQR24V-HF

Comchip TechnologyIn Stock: 19004CPDQR24V-HF Datasheet

Current PartRFQ

CPDQC24VE-HF

Comchip TechnologyIn Stock: 14938CPDQC24VE-HF Datasheet

MFR RecommendedRFQ

DESDALC5LP-7B

Diodes IncorporatedIn Stock: 10374DESDALC5LP-7B Datasheet

MFR RecommendedRFQ

ESDALC5-1BM2

STMicroelectronicsIn Stock: 17112ESDALC5-1BM2 Datasheet

MFR RecommendedRFQ

ESDALCL5-1BM2

STMicroelectronicsIn Stock: 18005ESDALCL5-1BM2 Datasheet

MFR RecommendedRFQ

ESDAVLC8-1BM2

STMicroelectronicsIn Stock: 23256ESDAVLC8-1BM2 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CPDQR24V-HF is determined by the following critical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 24V nominal rating
• Voltage - Breakdown (Min): 25V or higher
• Voltage - Clamping (Max) @ Ipp: 47V or lower
• Current - Peak Pulse (10/1000µs): 1A or higher
• Power - Peak Pulse: 47W or higher
• Package / Case: 0402 (1006 Metric) or compatible surface-mount package
• Mounting Type: Surface Mount
• Type: Zener (bidirectional TVS diode)
• RoHS Status: ROHS3 Compliant

The CPDQC24VE-HF qualifies as a direct manufacturer-recommended substitute, maintaining the same 24V standoff voltage and 0402 package while offering enhanced performance (3A peak pulse current, 138W peak power). The DESDALC5LP-7B, ESDALC5-1BM2, ESDALCL5-1BM2, and ESDAVLC8-1BM2 represent alternative suppliers' offerings with different voltage ratings and package configurations, suitable only for applications where voltage specifications permit deviation from the 24V nominal rating.

Parameter Comparison

Engineering Selection Recommendations

CPDQC24VE-HF is the manufacturer-recommended primary substitute for CPDQR24V-HF. Both parts are manufactured by Comchip Technology, maintain identical 24V reverse standoff voltage specifications, share the same 0402 (1006 Metric) package footprint, and are ROHS3 compliant with unlimited moisture sensitivity rating. The CPDQC24VE-HF offers superior performance characteristics with 3A peak pulse current versus 1A, and 138W peak power versus 47W, while maintaining compatible clamping voltage at 46V. This part carries Active product status, ensuring continued availability and supply chain stability.

DESDALC5LP-7B (Diodes Incorporated) is suitable only for applications where the circuit design permits operation at 3V reverse standoff voltage. While this part maintains the 0402 package form factor and offers higher peak pulse current (9A) and power dissipation (150W), the significantly lower voltage rating makes it incompatible with 24V protection requirements.

ESDALC5-1BM2, ESDALCL5-1BM2, and ESDAVLC8-1BM2 (STMicroelectronics) are not suitable direct substitutes for the CPDQR24V-HF due to substantially different voltage ratings (3V to 5V standoff) and package configurations (SOD-882 instead of 0402). These parts are included in the substitute list but require circuit redesign to implement.

For applications requiring continued 24V protection with the 0402 package, CPDQC24VE-HF is the recommended selection based on product status, compliance certifications, and electrical parameter compatibility.

Frequently Asked Questions (FAQ)

Q: Can CPDQC24VE-HF be used as a direct replacement for CPDQR24V-HF without PCB modifications?

A: Yes. Both parts share identical 24V reverse standoff voltage, 0402 (1006 Metric) package footprint, and SOD-923F supplier packaging. The CPDQC24VE-HF can be substituted without PCB layout changes. The enhanced current and power ratings provide improved performance margins.

Q: Why are ESDALC5-1BM2 and similar STMicroelectronics parts listed as substitutes if they have different voltage ratings?

A: These parts are listed based on the provided substitute list but are not suitable for applications requiring 24V protection. They represent alternative suppliers' offerings for different voltage protection requirements. Selection of these parts requires circuit redesign and application re-evaluation.

Q: What is the significance of the Last Time Buy status for CPDQR24V-HF?

A: Last Time Buy indicates the part is at end-of-life and will no longer be manufactured after a specified date. Designers should transition to CPDQC24VE-HF or other active alternatives to ensure long-term supply availability and avoid future obsolescence issues.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All parts listed in this reference, including CPDQR24V-HF and all substitutes, are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1), meeting current environmental and regulatory requirements.

Q: How do package differences between 0402 and SOD-882 affect substitution?

A: Package differences require PCB layout modifications. The 0402 (1006 Metric) package is significantly smaller than SOD-882. Substitution with SOD-882 packaged parts (ESDALC5-1BM2, ESDALCL5-1BM2, ESDAVLC8-1BM2) necessitates redesign of the PCB footprint and routing. For applications with fixed PCB layouts, only 0402 packaged alternatives (CPDQC24VE-HF, DESDALC5LP-7B) are viable.

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

A: The critical parameters are reverse standoff voltage (24V nominal), breakdown voltage minimum (25V or higher), clamping voltage maximum (47V or lower), peak pulse current (1A or higher), and peak pulse power (47W or higher). All parameters must be met or exceeded for functional equivalence in the application circuit.