30KP51A-TP Equivalent & Substitute Parts

Part Overview

The 30KP51A-TP is an active, ROHS3-compliant Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co. This unidirectional zener diode is designed for general-purpose transient voltage protection applications. The part operates across a junction temperature range of -55°C to 175°C and is supplied in tape and reel packaging with R-6 axial configuration. Substitute parts are identified when equivalent electrical performance and mechanical compatibility can be maintained within the specified parameter tolerances for this product category.

Substiute Parts

30KP51A-TP

Micro Commercial CoIn Stock: 114530KP51A-TP Datasheet

Current PartRFQ

15KPA51A

MDE Semiconductor IncIn Stock: 202815KPA51A Datasheet

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5KP51A

LittelfuseIn Stock: 42695KP51A Datasheet

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5KP51A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 82715KP51A-E3/54 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 30KP51A-TP is determined by the following criteria:

• Voltage - Reverse Standoff (Typ): 51V
• Voltage - Breakdown (Min): 57V minimum
• Voltage - Clamping (Max) @ Ipp: 82.4V to 86.4V range
• Type: Zener, unidirectional
• Mounting Type: Through Hole
• Operating Temperature: -55°C to 175°C (TJ)
• RoHS Status: ROHS3 Compliant

The three identified substitute parts maintain the critical voltage parameters and thermal operating range. Differences in power dissipation rating, package configuration, and peak pulse current do not preclude substitution when the application requirements fall within the lower power ratings of alternative parts.

Parameter Comparison

Engineering Selection Recommendations

All four parts maintain active product status and ROHS3 compliance. The 30KP51A-TP offers the highest peak pulse power rating at 30kW. The 15KPA51A provides an intermediate power rating of 15kW with identical voltage specifications. The 5KP51A and 5KP51A-E3/54 are rated for 5kW peak pulse power with clamping voltages within 0.4V of the main part.

Selection between these parts depends on application power dissipation requirements. Where peak pulse power does not exceed 15kW, the 15KPA51A is electrically equivalent. Where peak pulse power does not exceed 5kW, either the 5KP51A or 5KP51A-E3/54 may be used. Package differences (R-6 versus P600 axial) must be verified for mechanical fit in the target application.

Frequently Asked Questions (FAQ)

Q: Can the 5KP51A replace the 30KP51A-TP in all applications?

A: The 5KP51A maintains equivalent voltage parameters (51V standoff, 56.7V breakdown minimum, 82.4V clamping maximum) and identical operating temperature range. Substitution is valid only when the application's peak pulse power requirement does not exceed 5kW. If transient events exceed this power level, the 5KP51A will not provide adequate protection.

Q: What is the difference between the R-6 and P600 package configurations?

A: Both are axial through-hole packages for zener diodes. The R-6 package is used on the 30KP51A-TP. The P600 package is used on the 15KPA51A, 5KP51A, and 5KP51A-E3/54. Physical dimensions and lead spacing differ between these packages. Mechanical compatibility with the PCB layout must be confirmed before substitution.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The 30KP51A-TP, 15KPA51A, 5KP51A, and 5KP51A-E3/54 are all ROHS3 compliant and suitable for applications requiring restricted substance compliance.

Q: What is the significance of the clamping voltage difference between the main part and substitutes?

A: The 30KP51A-TP clamps at 86.4V maximum, while the 15KPA51A clamps at 82.8V and the 5KP51A and 5KP51A-E3/54 clamp at 82.4V. All values fall within the acceptable range for 51V standoff TVS diodes. The lower clamping voltage of substitute parts provides slightly more aggressive transient suppression. Circuit design must verify that this difference does not create unacceptable voltage stress on protected components.

Q: Can the 5KP51A-E3/54 be used interchangeably with the 5KP51A?

A: Yes. Both parts share identical voltage specifications (51V standoff, 56.7V breakdown minimum, 82.4V clamping maximum), power rating (5kW), operating temperature range (-55 to 175°C), and P600 axial package configuration. The primary difference is manufacturer (Vishay versus Littelfuse). Both are active, ROHS3-compliant products.