CD0603-T05C Equivalent & Substitute Parts

Part Overview

The CD0603-T05C is a 5V Zener Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc. in a 0603 surface mount package. This bidirectional TVS diode is designed for general-purpose transient voltage protection with a 5.1A peak pulse current rating (8/20µs) and 15V maximum clamping voltage. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD0603-T05C

Bourns Inc.In Stock: 942CD0603-T05C Datasheet

Current PartRFQ

CPDUC5V0USP-HF

Comchip TechnologyIn Stock: 32591CPDUC5V0USP-HF Datasheet

SimilarRFQ

CPDUR5V0HE-HF

Comchip TechnologyIn Stock: 44175CPDUR5V0HE-HF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD0603-T05C is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 5V (Max)
• Voltage - Breakdown (Min): 5.1V minimum
• Voltage - Clamping (Max) @ Ipp: Must not exceed application limits
• Current - Peak Pulse (8/20µs): Must meet or exceed 5.1A requirement
• Package / Case: 0603 (1608 Metric) surface mount

Compliance & Environmental Criteria:

• RoHS3 Compliant
• Moisture Sensitivity Level (MSL): 1 (Unlimited)
• Operating Temperature Range: -40°C ~ 125°C minimum

The identified substitute parts maintain the 5V reverse standoff voltage and 0603 package form factor while offering active product status and enhanced availability. Both substitutes meet RoHS3 compliance and MSL requirements.

Parameter Comparison

Engineering Selection Recommendations

CPDUC5V0USP-HF (Comchip Technology): This substitute offers active product status with extended operating temperature range (-55°C ~ 150°C). However, the peak pulse current rating of 3A is below the original 5.1A specification. This part is suitable only for applications where the 5.1A requirement can be relaxed. The unidirectional configuration differs from the original bidirectional design. ROHS3 compliance and MSL 1 rating are maintained.

CPDUR5V0HE-HF (Comchip Technology): This substitute provides active product status with peak pulse current of 8A, exceeding the original 5.1A requirement. The 16V clamping voltage is within acceptable range for most applications. Operating temperature range matches the original specification (-40°C ~ 125°C). Bidirectional configuration aligns with the original part. ROHS3 compliance and MSL 1 rating are maintained. This part represents the closest functional equivalent.

Both substitutes maintain the critical 5V reverse standoff voltage and 0603 package footprint required for direct replacement. Selection between them depends on application-specific current handling requirements and directional protection needs.

Frequently Asked Questions (FAQ)

Q: Can CPDUC5V0USP-HF directly replace CD0603-T05C? A: Direct replacement is not recommended. While the part maintains 5V standoff voltage and 0603 package compatibility, the 3A peak pulse current rating is insufficient for applications requiring the original 5.1A specification. Additionally, the unidirectional configuration differs from the original bidirectional design.

Q: Is CPDUR5V0HE-HF a suitable substitute for CD0603-T05C? A: Yes, CPDUR5V0HE-HF is the preferred substitute. It maintains bidirectional operation, exceeds the 5.1A current requirement with 8A capability, and operates within the same temperature range. The 16V clamping voltage is compatible with the original application parameters. Both parts are ROHS3 compliant with MSL 1 rating.

Q: What are the key differences in package designation between substitutes? A: CD0603-T05C uses 0603 (1608 Metric) package. CPDUC5V0USP-HF uses 0603C/SOD-523F package. CPDUR5V0HE-HF uses 0603/SOD-523F package. All three are surface mount configurations compatible with standard 0603 footprints, though PCB layout verification is recommended.

Q: Why is the original CD0603-T05C obsolete? A: The CD0603-T05C is classified as obsolete by the manufacturer. Active substitute parts from Comchip Technology provide equivalent or superior electrical performance with ongoing manufacturing support and availability.

Q: Are both substitutes RoHS3 compliant? A: Yes, both CPDUC5V0USP-HF and CPDUR5V0HE-HF are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, matching the original part's environmental compliance.

Q: What is the primary consideration when selecting between the two substitutes? A: The primary consideration is peak pulse current requirement. CPDUR5V0HE-HF with 8A capability is recommended for applications requiring the full 5.1A specification. CPDUC5V0USP-HF with 3A capability is suitable only for lower-current applications where the reduced rating is acceptable.