15KP33A-TP Transient Voltage Suppressor Diode - Equivalent & Substitute Parts

Part Overview

The 15KP33A-TP is an active Transient Voltage Suppressor (TVS) diode manufactured by Micro Commercial Co, designed for general-purpose overvoltage protection applications. This unidirectional zener diode operates with a 33V reverse standoff voltage and provides 54.8V maximum clamping voltage at peak pulse current, with 15kW peak pulse power handling capability. The device is packaged in R-6 axial configuration and is ROHS3 compliant with unlimited moisture sensitivity rating.

Equivalent and substitute parts are identified based on matching core electrical parameters: reverse standoff voltage (33V), voltage classification, zener diode type, unidirectional channel configuration, through-hole mounting, and general-purpose application suitability. Substitutes may vary in clamping voltage, peak pulse current, power dissipation, and package form factor while maintaining functional compatibility within specified operating ranges.

Substiute Parts

15KP33A-TP

Micro Commercial CoIn Stock: 116015KP33A-TP Datasheet

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15KPA33A

MDE Semiconductor IncIn Stock: 153615KPA33A Datasheet

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30KPA33A

MDE Semiconductor IncIn Stock: 203830KPA33A Datasheet

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5KP33A

Diotec SemiconductorIn Stock: 43285KP33A Datasheet

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5KP33A-E3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 28815KP33A-E3/54 Datasheet

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5KP33AHE3/54

Vishay General Semiconductor - Diodes DivisionIn Stock: 21005KP33AHE3/54 Datasheet

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BZW50-33

STMicroelectronicsIn Stock: 1510BZW50-33 Datasheet

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BZW50-33RL

STMicroelectronicsIn Stock: 2825BZW50-33RL Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 15KP33A-TP is determined by the following core parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff: 33V (exact match required)
• Type: Zener diode
• Unidirectional Channels: 1
• Mounting Type: Through Hole
• Applications: General Purpose

Secondary Compatibility Parameters:

• Voltage - Breakdown (Min): 36.6V to 36.9V range acceptable
• Voltage - Clamping (Max) @ Ipp: 53.3V to 58.5V range acceptable
• Power - Peak Pulse: 5000W to 30000W range acceptable
• Operating Temperature: -55°C to -50°C minimum, 175°C maximum
• Package / Case: R-6 or P600 axial configurations acceptable

Substitute parts are grouped into two categories based on power dissipation capability: lower-power 5kW devices (5KP33A series and BZW50-33 series) and higher-power 15kW to 30kW devices (15KPA33A and 30KPA33A). All identified substitutes maintain the 33V reverse standoff voltage specification and general-purpose application classification.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (Matched Power Rating):

15KPA33A and 30KPA33A are functionally equivalent to 15KP33A-TP for applications requiring 15kW or higher peak pulse power dissipation. Both are manufactured by MDE Semiconductor Inc, ROHS3 compliant, and maintain identical reverse standoff voltage and breakdown specifications. 15KPA33A provides equivalent 15kW power handling with 54.7V clamping voltage. 30KPA33A offers enhanced 30kW power capability with 58.5V clamping voltage for higher-stress transient protection scenarios. Both use P600 axial package configuration instead of R-6.

Lower-Power Alternatives (5kW Rating):

5KP33A, 5KP33A-E3/54, and 5KP33AHE3/54 are suitable substitutes for applications where 5kW peak pulse power is sufficient. All three maintain 33V reverse standoff voltage and 53.3V clamping voltage. 5KP33A-E3/54 and 5KP33AHE3/54 are Vishay TransZorb® series devices with ROHS3 compliance. 5KP33AHE3/54 includes AEC-Q101 automotive qualification. 5KP33A is manufactured by Diotec Semiconductor with RoHS status not applicable. All three use P600 axial package.

Package-Compatible Alternatives (R-6 Axial):

BZW50-33 and BZW50-33RL are STMicroelectronics TRANSIL™ series devices maintaining R-6 axial package compatibility with 15KP33A-TP. Both provide 5kW peak pulse power with 76V clamping voltage and 789A peak pulse current (8/20µs pulse definition). Both are ROHS3 compliant and active products. BZW50-33RL is supplied in Cut Tape packaging; BZW50-33 is supplied in Tube packaging.

Compliance Considerations:

All identified substitutes maintain ROHS3 compliance except 5KP33A (Diotec), which has RoHS status not applicable. All active products are suitable for new designs. Operating temperature range varies: 5KP33A operates -50°C to 175°C (narrower minimum range than 15KP33A-TP at -55°C).

Frequently Asked Questions (FAQ)

Q: Can 5KP33A series devices replace 15KP33A-TP in all applications?

A: 5KP33A series devices are suitable only for applications where peak pulse power does not exceed 5kW. The 15KP33A-TP is rated for 15kW peak pulse power. If your circuit requires 15kW or higher transient suppression capability, use 15KPA33A (15kW) or 30KPA33A (30kW) instead.

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

A: Both are axial through-hole packages for TVS diodes. R-6 is the smaller package form used by 15KP33A-TP, BZW50-33, and BZW50-33RL. P600 is a larger package used by 15KPA33A, 30KPA33A, 5KP33A, 5KP33A-E3/54, and 5KP33AHE3/54. Package selection depends on PCB layout constraints and thermal management requirements.

Q: Are BZW50-33 and BZW50-33RL interchangeable?

A: BZW50-33 and BZW50-33RL are electrically identical with matching electrical specifications. The difference is packaging: BZW50-33 is supplied in Tube; BZW50-33RL is supplied in Cut Tape. Selection depends on your procurement and assembly process requirements.

Q: What does the clamping voltage difference between 54.8V (15KP33A-TP) and 76V (BZW50-33) mean for circuit protection?

A: Clamping voltage is the maximum voltage the TVS diode allows across the protected circuit during transient suppression. Lower clamping voltage (54.8V) provides tighter voltage regulation but may require higher peak pulse current handling. Higher clamping voltage (76V) allows higher transient voltages but provides less restrictive protection. Select based on your circuit's maximum allowable voltage specification.

Q: Is 5KP33AHE3/54 suitable for automotive applications?

A: 5KP33AHE3/54 includes AEC-Q101 automotive qualification, making it suitable for automotive-grade applications. Other substitutes do not carry automotive qualification unless explicitly stated.

Q: What is the significance of the 10/1000µs and 8/20µs pulse definitions?

A: These define the test pulse waveform used to measure peak pulse current and power ratings. 10/1000µs is a standard industrial pulse definition. 8/20µs is a standard lightning/surge pulse definition. Both are valid for general-purpose TVS diode applications. Verify your application's transient pulse characteristics match the rated pulse definition.

Q: Can I use 30KPA33A as a direct replacement for 15KP33A-TP?

A: Yes, 30KPA33A is a direct functional replacement with higher power capability (30kW vs 15kW). It maintains identical 33V reverse standoff voltage and compatible clamping voltage (58.5V vs 54.8V). The primary consideration is package change from R-6 to P600, which requires PCB layout modification.