30KPA43C-B Equivalent & Substitute Parts

Part Overview

The 30KPA43C-B is a bidirectional Zener transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., rated for 43V reverse standoff voltage with a 76.65V maximum clamping voltage at peak pulse current of 415.1A. This component is designed for general-purpose transient voltage suppression in through-hole P600 axial package configuration. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing system support and new designs requiring similar electrical performance characteristics.

Substiute Parts

30KPA43C-B

Littelfuse Inc.In Stock: 84630KPA43C-B Datasheet

Current PartRFQ

30KPA43CA

MDE Semiconductor IncIn Stock: 216730KPA43CA Datasheet

DirectRFQ

30KPA43CA-B

Littelfuse Inc.In Stock: 86830KPA43CA-B Datasheet

DirectRFQ

15KP43CA-TP

Micro Commercial CoIn Stock: 129715KP43CA-TP Datasheet

MFR RecommendedRFQ

15KPA43CAE3/TR13

Microchip TechnologyIn Stock: 74115KPA43CAE3/TR13 Datasheet

MFR RecommendedRFQ

5KP43CA-TP

Micro Commercial CoIn Stock: 13495KP43CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 30KPA43C-B is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 43V
• Bidirectional Channels: 1
• Type: Zener
• Operating Temperature Range: -55°C ~ 175°C (TJ)
• Mounting Type: Through Hole
• Package / Case: P600 or R-6 Axial

Secondary Compatibility Factors:

• Voltage - Breakdown (Min): 45.36V to 48V range
• Voltage - Clamping (Max) @ Ipp: 69.4V to 76.65V range
• Current - Peak Pulse: 216.3A to 415.1A
• Power - Peak Pulse: 5000W to 30000W
• RoHS3 Compliance

Substitute parts maintain the 43V reverse standoff voltage specification and operate within the same temperature range. Clamping voltage and peak pulse current vary based on power rating and manufacturer design, with lower-power variants (5kW and 15kW) providing reduced peak pulse current compared to the original 30kW specification.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalents (30kW Power Rating, P600 Package):

The 30KPA43CA and 30KPA43CA-B are direct functional equivalents to the obsolete 30KPA43C-B. Both maintain the 30000W peak pulse power rating, 415.1A peak pulse current, and P600 axial package. The 30KPA43CA-B is manufactured by Littelfuse Inc., the original manufacturer, and is currently in active production status. The 30KPA43CA is manufactured by MDE Semiconductor Inc. and is also active. Both parts are ROHS3 compliant and operate across the full -55°C to 175°C temperature range. Selection between these two should prioritize the 30KPA43CA-B for supply chain continuity with the original manufacturer.

Alternative Substitutes (Reduced Power Rating):

The 15KPA43CAE3/TR13 (Microchip Technology) and 15KP43CA-TP (Micro Commercial Co) provide 15000W peak pulse power rating with the same 43V reverse standoff voltage. The 15KPA43CAE3/TR13 maintains the P600 package and 415.1A peak pulse current specification, while the 15KP43CA-TP uses an R-6 package with unspecified peak pulse current. The 5KP43CA-TP (Micro Commercial Co) provides 5000W peak pulse power rating in R-6 package and is suitable only for applications with reduced transient energy requirements.

All substitute parts are ROHS3 compliant and operate within the specified temperature range. Selection of lower-power alternatives requires confirmation that application transient energy levels do not exceed the reduced power rating.

Frequently Asked Questions (FAQ)

Q: Can the 30KPA43CA-B directly replace the obsolete 30KPA43C-B?

A: Yes. The 30KPA43CA-B is a direct equivalent with identical electrical specifications: 43V reverse standoff voltage, 30000W peak pulse power, 415.1A peak pulse current, and P600 axial through-hole package. Both are ROHS3 compliant and operate across -55°C to 175°C.

Q: What is the difference between the 30KPA43CA and 30KPA43CA-B?

A: Both parts share identical electrical specifications and P600 packaging. The primary difference is manufacturer: 30KPA43CA is manufactured by MDE Semiconductor Inc., while 30KPA43CA-B is manufactured by Littelfuse Inc. (the original manufacturer of the 30KPA43C-B).

Q: Can I use the 15KPA43CAE3/TR13 as a substitute?

A: The 15KPA43CAE3/TR13 maintains the 43V reverse standoff voltage, P600 package, and full temperature range. However, it is rated for 15000W peak pulse power compared to the original 30000W specification. Use this part only if application transient energy requirements do not exceed 15000W.

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

A: Both are axial through-hole packages for TVS diodes. The P600 package is used by the main part and higher-power variants. The R-6 package is used by the 15KP43CA-TP and 5KP43CA-TP lower-power alternatives. Package selection depends on PCB layout and mechanical constraints.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the original 30KPA43C-B.

Q: Which substitute should I select for new designs?

A: For new designs requiring 30kW peak pulse power and P600 package, select the 30KPA43CA-B (Littelfuse Inc.). For applications with reduced transient energy requirements, the 15KPA43CAE3/TR13 or lower-power alternatives may be suitable if PCB layout accommodates the package type.