CPDQR12V TVS Diode Equivalent & Substitute Parts

Part Overview

The CPDQR12V is a transient voltage suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose overvoltage protection in surface mount applications. This bidirectional zener diode features a 12V reverse standoff voltage with a 25V maximum clamping voltage and 1A peak pulse current rating in a compact 0402 (1005 Metric) package. The component is RoHS3 compliant and carries unlimited moisture sensitivity level (MSL 1), making it suitable for standard industrial and consumer electronics applications.

The CPDQR12V is currently in active production status with 966 pieces available in inventory. Equivalent and substitute parts are identified based on matching package type, mounting configuration, and electrical performance parameters within acceptable tolerance ranges for TVS diode applications.

Substiute Parts

CPDQR12V

Comchip TechnologyIn Stock: 1050CPDQR12V Datasheet

Current PartRFQ

B72590T0040M060

EPCOS - TDK ElectronicsIn Stock: 77100B72590T0040M060 Datasheet

MFR RecommendedRFQ

B72590T0140L060

EPCOS - TDK ElectronicsIn Stock: 40138B72590T0140L060 Datasheet

MFR RecommendedRFQ

B72590T0170S160

EPCOS - TDK ElectronicsIn Stock: 8503B72590T0170S160 Datasheet

MFR RecommendedRFQ

B72590T7050S160

EPCOS - TDK ElectronicsIn Stock: 1274B72590T7050S160 Datasheet

MFR RecommendedRFQ

B72590T7271V60

EPCOS - TDK ElectronicsIn Stock: 32136B72590T7271V60 Datasheet

MFR RecommendedRFQ

B72590T8140S160

EPCOS - TDK ElectronicsIn Stock: 665501B72590T8140S160 Datasheet

MFR RecommendedRFQ

D5V0L1B2LP-7B

Diodes IncorporatedIn Stock: 125130D5V0L1B2LP-7B Datasheet

MFR RecommendedRFQ

D5V0L1B2LP4-7B

Diodes IncorporatedIn Stock: 73787D5V0L1B2LP4-7B Datasheet

MFR RecommendedRFQ

DESDALC5LP-7B

Diodes IncorporatedIn Stock: 10374DESDALC5LP-7B Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CPDQR12V are identified based on the following substitution criteria:

Primary Matching Criteria:

• Package type: 0402 (1005 Metric) surface mount
• Component category: Transient voltage suppression devices
• Mounting configuration: Surface mount technology
• RoHS3 compliance and MSL 1 rating

Electrical Performance Ranges: Substitutes are grouped by voltage classification relative to the CPDQR12V's 12V reverse standoff specification. Acceptable substitutes maintain comparable clamping voltage performance and peak pulse current ratings within the constraints of their respective device architectures (TVS diodes versus varistors).

Device Type Considerations: The substitute list includes both TVS diodes (Diodes Incorporated) and varistors (EPCOS - TDK Electronics). While these represent different protection technologies, both are classified as transient voltage suppressors and share the same package footprint and mounting requirements.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active production status and RoHS3 compliance, meeting the regulatory and supply chain requirements of the CPDQR12V. Selection of an appropriate substitute depends on the specific voltage protection requirements of the application circuit.

For Low-Voltage Applications (3V–5V Protection): The Diodes Incorporated TVS diodes (D5V0L1B2LP-7B, D5V0L1B2LP4-7B, and DESDALC5LP-7B) are suitable for circuits requiring protection at lower voltage levels. These devices offer higher peak pulse current ratings (6A–9A) compared to the CPDQR12V, providing enhanced surge handling capability in compact packages.

For Mid-Voltage Applications (10V–28V Protection): The EPCOS - TDK Electronics varistors (B72590T0040M060, B72590T0140L060, B72590T0170S160, and B72590T8140S160) cover the voltage range spanning and exceeding the CPDQR12V's 12V specification. These components offer significantly higher surge current ratings (2A–20A) and are suitable for applications requiring robust transient suppression.

For High-Voltage Applications (255V–310V Protection): The EPCOS - TDK Electronics varistors (B72590T7050S160 and B72590T7271V60) address high-voltage transient suppression requirements beyond the CPDQR12V's operating range.

Package Compatibility: All substitute parts are available in 0402 (1005 Metric) surface mount packages, ensuring mechanical and thermal compatibility with existing PCB layouts designed for the CPDQR12V. Diodes Incorporated parts use a 1006 Metric variant of the 0402 package, which maintains footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can the EPCOS varistors directly replace the CPDQR12V TVS diode?

A: EPCOS varistors and Comchip TVS diodes are both classified as transient voltage suppressors and share identical 0402 package footprints. However, they operate on different physical principles. Varistors exhibit nonlinear resistance that decreases with applied voltage, while TVS diodes use zener breakdown. Both provide overvoltage protection, but circuit performance characteristics differ. Substitution is permissible only when the application circuit tolerates the electrical behavior differences between these device types.

Q: What is the difference between the Diodes Incorporated TVS diodes and the CPDQR12V?

A: The Diodes Incorporated TVS diodes (D5V0L1B2LP-7B, D5V0L1B2LP4-7B, DESDALC5LP-7B) are zener-based TVS diodes identical in technology to the CPDQR12V. Key differences are voltage ratings and current handling. The D5V0L1 series operates at 5V with 6A peak pulse current, while DESDALC5LP-7B operates at 3V with 9A peak pulse current. The CPDQR12V operates at 12V with 1A peak pulse current. Selection depends on the required protection voltage level for the application.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are surface mount devices in 0402 (1005 Metric) packages or compatible 1006 Metric variants. This ensures mechanical compatibility with PCB layouts designed for the CPDQR12V without requiring footprint modifications.

Q: What does RoHS3 compliance mean for component substitution?

A: RoHS3 compliance indicates that the component meets Restriction of Hazardous Substances Directive requirements, restricting the use of specific hazardous materials. All listed substitute parts carry RoHS3 compliance, ensuring regulatory equivalence with the CPDQR12V for applications subject to RoHS requirements.

Q: How do I select the correct voltage rating for a substitute part?

A: The substitute part's voltage rating must match the protection requirement of the application circuit. The CPDQR12V's 12V reverse standoff voltage is appropriate for circuits operating at or below 12V. For circuits operating at different voltage levels, select a substitute with a voltage rating corresponding to the circuit's nominal operating voltage. Refer to the voltage specifications in the Parameter Comparison table.

Q: What is the significance of MSL 1 (Unlimited) rating?

A: MSL 1 indicates unlimited shelf life without moisture baking requirements. All substitute parts carry MSL 1 rating, meaning they can be stored and handled under standard conditions without special moisture control procedures, matching the CPDQR12V's storage and handling requirements.