5KP51CA-G Transient Voltage Suppressor - Equivalent & Substitute Parts

Part Overview

The 5KP51CA-G is an active Zener-type Transient Voltage Suppressor (TVS) diode manufactured by Comchip Technology, designed for general-purpose voltage transient protection in through-hole applications. This bidirectional TVS diode operates with a 51V reverse standoff voltage and provides 82.4V maximum clamping voltage at peak pulse current. The part is currently in active production status with 966 units in stock inventory.

Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained across the critical parameters that define TVS diode functionality: reverse standoff voltage, breakdown voltage, clamping voltage, peak pulse current capacity, and power dissipation rating.

Substiute Parts

5KP51CA-G

Comchip TechnologyIn Stock: 10625KP51CA-G Datasheet

Current PartRFQ

30KPA51CA

MDE Semiconductor IncIn Stock: 207930KPA51CA Datasheet

MFR RecommendedRFQ

5KP51CA-TP

Micro Commercial CoIn Stock: 16205KP51CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP51CA-G is determined by the following critical parameters:

• Voltage Class Match: Reverse standoff voltage of 51V ± tolerance and breakdown voltage minimum of 56.7V or higher
• Clamping Performance: Maximum clamping voltage at Ipp must not exceed 82.4V to maintain circuit protection integrity
• Current Handling: Peak pulse current capacity must meet or exceed 60.68A at the 10/1000µs pulse profile
• Power Dissipation: Peak pulse power rating must be sufficient for the application (5000W minimum for direct substitution)
• Thermal Range: Operating temperature range must encompass the application requirements
• Mounting Compatibility: Through-hole axial package format required for mechanical fit
• Compliance: RoHS3 compliance and REACH status must be maintained

Two substitute parts meet these criteria with varying performance enhancements.

Parameter Comparison

Engineering Selection Recommendations

5KP51CA-TP (Micro Commercial Co)

This substitute maintains identical electrical specifications to the main part: 51V reverse standoff, 56.7V minimum breakdown, and 82.4V clamping voltage. The R-6 axial package provides direct mechanical compatibility. The extended operating temperature range (-55 to 175°C) offers improved thermal margin compared to the main part. Both parts are ROHS3 compliant and REACH unaffected. This substitute is suitable for direct replacement in applications where the original part is unavailable.

30KPA51CA (MDE Semiconductor Inc)

This substitute maintains the 51V voltage class but operates at higher performance levels: 350.7A peak pulse current and 30000W peak pulse power rating compared to 60.68A and 5000W respectively. The clamping voltage is 86.4V, which is 4V higher than the main part. The P600 axial package differs mechanically from the R-6 package. This substitute is applicable only in applications where the higher current and power ratings do not create circuit protection conflicts and where the P600 package can be accommodated. The extended operating temperature range (-55 to 175°C) and ROHS3 compliance are maintained.

Frequently Asked Questions (FAQ)

Q: Can 5KP51CA-TP be used as a direct drop-in replacement for 5KP51CA-G?

A: Yes. Both parts share identical voltage specifications (51V standoff, 56.7V breakdown, 82.4V clamping), power rating (5000W), and R-6 axial package format. The 5KP51CA-TP offers an extended operating temperature range to 175°C, which is a performance enhancement. Both are ROHS3 compliant.

Q: What is the key difference between 5KP51CA-TP and 30KPA51CA?

A: The 5KP51CA-TP maintains the original 5000W power rating and 60.68A peak pulse current specification. The 30KPA51CA provides significantly higher performance: 30000W power rating and 350.7A peak pulse current. The 30KPA51CA also uses a P600 package instead of R-6, requiring mechanical board layout verification. The clamping voltage of 30KPA51CA is 86.4V versus 82.4V for the main part.

Q: Is the 30KPA51CA suitable for all applications using 5KP51CA-G?

A: The 30KPA51CA is electrically compatible in the 51V voltage class but introduces two considerations: the higher clamping voltage (86.4V) may affect circuit protection thresholds in sensitive applications, and the P600 package requires different board layout accommodation than the R-6 package. Verify mechanical fit and circuit protection requirements before substitution.

Q: Are all three parts RoHS3 compliant?

A: Yes. The 5KP51CA-G, 5KP51CA-TP, and 30KPA51CA are all ROHS3 compliant. The 5KP51CA-G and 5KP51CA-TP are REACH unaffected; the 30KPA51CA has REACH information available upon request.

Q: What is the significance of the 10/1000µs pulse profile specification?

A: This specification defines the peak pulse current rating under a specific transient waveform: 10µs rise time and 1000µs pulse width. This standardized pulse profile allows comparison of TVS diode performance across different manufacturers and part numbers. All three parts are rated under this same pulse profile.