CPDT-5V0U Equivalent & Substitute Parts

Part Overview

The CPDT-5V0U is a Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional zener diode operates with a 5V reverse standoff voltage and provides 10V maximum clamping voltage at peak pulse current. The component is Active status and ROHS3 compliant, with unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when inventory constraints, lead time requirements, or design flexibility necessitate alternative sourcing while maintaining electrical and mechanical compatibility.

Substiute Parts

CPDT-5V0U

Comchip TechnologyIn Stock: 872CPDT-5V0U Datasheet

Current PartRFQ

CPDT-5V0SR

Comchip TechnologyIn Stock: 9195CPDT-5V0SR Datasheet

DirectRFQ

CPDT-5V0U-HF

Comchip TechnologyIn Stock: 3176CPDT-5V0U-HF Datasheet

DirectRFQ

SM12-7

Diodes IncorporatedIn Stock: 17336SM12-7 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution logic for the CPDT-5V0U is based on the following critical electrical and mechanical parameters:

Direct Substitutes (Identical Electrical Specifications):

• Voltage - Reverse Standoff: 5V
• Voltage - Breakdown (Min): 6.1V
• Voltage - Clamping (Max) @ Ipp: 10V
• Current - Peak Pulse (8/20µs): 8A
• Power - Peak Pulse: 80W
• Package / Case: SOT-23-3
• Unidirectional Channels: 2

Alternative Substitute (Different Voltage Rating):

• The SM12-7 operates at a higher voltage class (12V reverse standoff, 19V clamping) and is classified as a manufacturer-recommended alternative. This part maintains the same package form factor (SOT-23-3) and unidirectional channel configuration but is suitable only for applications requiring higher voltage protection thresholds.

Parameter Comparison

Engineering Selection Recommendations

CPDT-5V0SR and CPDT-5V0U-HF are direct electrical and mechanical equivalents to the CPDT-5V0U. Both parts maintain identical voltage ratings, current handling, power dissipation, and package specifications. Selection among these three Comchip Technology parts is determined by inventory availability and lead time requirements. All three parts are Active status, ROHS3 compliant, and suitable for identical circuit applications.

SM12-7 (Diodes Incorporated) is a manufacturer-recommended alternative with different electrical specifications. This part operates at a higher voltage class (12V reverse standoff versus 5V) and provides increased current handling (12A versus 8A) and power dissipation (300W versus 80W). The SM12-7 maintains the same SOT-23-3 package form factor and unidirectional channel configuration. This part is qualified to AEC-Q101 automotive standards and operates across an extended temperature range (-65°C to 150°C). Selection of SM12-7 is appropriate only for applications requiring higher voltage protection thresholds than the 5V class.

Frequently Asked Questions (FAQ)

Q: Can CPDT-5V0SR and CPDT-5V0U-HF be used interchangeably with CPDT-5V0U?

A: Yes. CPDT-5V0SR and CPDT-5V0U-HF are direct substitutes with identical electrical specifications (5V reverse standoff, 10V clamping voltage, 8A peak pulse current, 80W power dissipation) and the same SOT-23-3 package. No circuit modifications are required.

Q: When is SM12-7 an appropriate substitute?

A: SM12-7 is suitable only for applications where the circuit design requires higher voltage protection. The 12V reverse standoff and 19V clamping voltage of SM12-7 differ from the 5V and 10V specifications of CPDT-5V0U. Use SM12-7 only if your application requires this higher voltage rating.

Q: Are all substitute parts in the same package?

A: Yes. CPDT-5V0U, CPDT-5V0SR, CPDT-5V0U-HF, and SM12-7 all use the SOT-23-3 package (TO-236-3, SC-59). No PCB layout modifications are necessary for direct substitutes.

Q: What compliance certifications apply to these parts?

A: All four parts are ROHS3 compliant and REACH unaffected. SM12-7 carries additional AEC-Q101 automotive qualification. All parts have MSL 1 (unlimited) moisture sensitivity rating.

Q: Do these parts have different lead times or availability?

A: Inventory levels vary. CPDT-5V0SR has 9,100 pieces in stock, CPDT-5V0U-HF has 3,100 pieces, CPDT-5V0U has 808 pieces, and SM12-7 has 17,256 pieces available. Availability should be confirmed at time of procurement.