3KP7.0C-B Equivalent & Substitute Parts

Part Overview

The 3KP7.0C-B is a Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage protection applications. This through-hole component features a 7V reverse standoff voltage and 12.6V maximum clamping voltage with 250A peak pulse current capability. The part is currently classified as obsolete, making identification of suitable substitute components essential for ongoing design support and procurement continuity.

Substiute Parts

3KP7.0C-B

Littelfuse Inc.In Stock: 10623KP7.0C-B Datasheet

Current PartRFQ

5KP7.0CA-B

Littelfuse Inc.In Stock: 7585KP7.0CA-B Datasheet

DirectRFQ

3KP7.0CA-TP

Micro Commercial CoIn Stock: 7473KP7.0CA-TP Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 3KP7.0C-B are qualified based on the following critical parameters:

• Voltage - Reverse Standoff: 7V (identical)
• Voltage - Clamping (Max) @ Ipp: 12V to 12.6V range (acceptable tolerance)
• Current - Peak Pulse (10/1000µs): 250A minimum
• Operating Temperature Range: -55°C to 175°C (identical)
• Mounting Type: Through Hole (identical)
• Package / Case: P600 or R-6 Axial (compatible form factors)
• RoHS Status: ROHS3 Compliant (regulatory requirement)

Two substitute parts meet these criteria: the 5KP7.0CA-B (Littelfuse Inc., active status) and the 3KP7.0CA-TP (Micro Commercial Co, active status). Both maintain the core electrical specifications while offering improved availability through active product status.

Parameter Comparison

Engineering Selection Recommendations

The 5KP7.0CA-B is the primary substitute for the 3KP7.0C-B. Both components are manufactured by Littelfuse Inc., share identical package geometry (P600 Axial), and maintain equivalent voltage specifications. The 5KP7.0CA-B offers enhanced current handling (425A versus 250A) and increased power dissipation (5000W versus 3000W), providing superior performance margins in the same form factor. Active product status ensures long-term availability and supply chain continuity.

The 3KP7.0CA-TP, manufactured by Micro Commercial Co, provides an alternative substitute with matched electrical performance to the original part (250A peak pulse current, 3000W power dissipation). This option uses the R-6 axial package instead of P600. Active product status and ROHS3 compliance support procurement viability.

Both substitutes maintain ROHS3 compliance and unlimited moisture sensitivity rating, meeting regulatory and environmental requirements equivalent to the original component.

Frequently Asked Questions (FAQ)

Q: Can the 5KP7.0CA-B directly replace the 3KP7.0C-B in existing designs?

A: Yes. Both components share identical reverse standoff voltage (7V), compatible clamping voltage specifications (12V versus 12.6V), and identical through-hole P600 axial package geometry. The 5KP7.0CA-B's higher current rating (425A) and power dissipation (5000W) provide enhanced protection without requiring circuit modifications.

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

A: Both are through-hole axial packages for TVS diodes. The P600 package is used by the 3KP7.0C-B and 5KP7.0CA-B. The R-6 package is used by the 3KP7.0CA-TP. Package selection depends on PCB layout and lead spacing requirements. Verify mechanical compatibility with your specific board design.

Q: Why is the 3KP7.0C-B classified as obsolete?

A: Obsolete status indicates the manufacturer has discontinued production. Active substitute parts (5KP7.0CA-B and 3KP7.0CA-TP) provide equivalent or superior functionality with assured long-term availability.

Q: Are there compliance differences between the substitutes?

A: No. All three components are ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Regulatory and environmental compliance requirements are equivalent.

Q: Which substitute should I select for new designs?

A: The 5KP7.0CA-B is recommended for new designs due to manufacturer continuity (Littelfuse Inc.), identical package geometry, and superior performance specifications. The 3KP7.0CA-TP serves as an alternative if package constraints or supply considerations favor the R-6 form factor.