5KP70C-B Equivalent & Substitute Parts

Part Overview

The 5KP70C-B is a bidirectional transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This component features a 70V reverse standoff voltage rating and 5000W peak pulse power handling capability in a through-hole P600 axial package. The product is currently obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued system support and new designs.

Substiute Parts

5KP70C-B

Littelfuse Inc.In Stock: 8575KP70C-B Datasheet

Current PartRFQ

5KP70CA

Diotec SemiconductorIn Stock: 37915KP70CA Datasheet

DirectRFQ

5KP70CA-B

Littelfuse Inc.In Stock: 6965KP70CA-B Datasheet

DirectRFQ

5KP70CE3/TR13

Microchip TechnologyIn Stock: 7905KP70CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 5KP70C-B is determined by strict adherence to the following electrical and mechanical parameters:

Critical Matching Parameters:

• Voltage - Reverse Standoff (Typ): 70V
• Power - Peak Pulse: 5000W (5kW)
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Bidirectional Channels: 1
• Type: Zener

Allowable Variation Parameters:

• Voltage - Breakdown (Min): Range 73.71V to 77.8V
• Voltage - Clamping (Max) @ Ipp: Range 113V to 125V
• Current - Peak Pulse (10/1000µs): 40A to 45.1A
• Operating Temperature: -55°C to -50°C minimum; 175°C maximum

All identified substitute parts maintain the 70V reverse standoff voltage, 5000W power rating, and P600 axial through-hole package configuration. Variations in clamping voltage and peak pulse current remain within acceptable engineering tolerances for general-purpose transient suppression applications.

Parameter Comparison

Engineering Selection Recommendations

5KP70CA-B (Littelfuse Inc.) is the primary substitute for the obsolete 5KP70C-B. This part maintains identical manufacturer lineage, ROHS3 compliance, and operating temperature range (-55°C ~ 175°C). The clamping voltage of 113V represents a 4.8% reduction from the original 118.65V specification, remaining within acceptable tolerance for general-purpose transient suppression. Active product status ensures long-term availability and supply chain continuity.

5KP70CE3/TR13 (Microchip Technology) serves as an alternative substitute with ROHS3 compliance and identical operating temperature range. The clamping voltage of 125V represents a 5.4% increase from the original specification. This part is supplied in Tape & Reel packaging, suitable for automated assembly environments. Active product status supports ongoing procurement.

5KP70CA (Diotec Semiconductor) is functionally equivalent with matching electrical parameters. The operating temperature minimum of -50°C represents a 5°C reduction compared to the original -55°C specification. This part is suitable for applications where the lower temperature limit is not a design constraint. Active product status enables standard procurement channels.

All three substitute parts maintain the critical 70V reverse standoff voltage, 5000W power rating, and P600 axial through-hole package configuration required for direct functional replacement.

Frequently Asked Questions (FAQ)

Q: Can the 5KP70CA-B directly replace the obsolete 5KP70C-B without circuit modification?

A: Yes. The 5KP70CA-B maintains identical reverse standoff voltage (70V), peak pulse power (5000W), package type (P600 axial), and mounting configuration (through-hole). The clamping voltage difference of 5.4V falls within acceptable engineering tolerance for general-purpose transient suppression circuits.

Q: What is the significance of the clamping voltage variation between substitute parts?

A: Clamping voltage determines the maximum voltage presented to protected circuitry during a transient event. The 5KP70C-B specifies 118.65V maximum clamping. Substitutes range from 113V to 125V. Selection depends on the protected circuit's voltage tolerance. Lower clamping voltage (113V) provides tighter protection; higher clamping voltage (125V) reduces component stress during suppression events.

Q: Does the 5°C difference in minimum operating temperature for the Diotec 5KP70CA affect compatibility?

A: The Diotec part specifies -50°C minimum versus -55°C for the original. Compatibility depends on application requirements. If the circuit operates at or below -50°C, the Littelfuse 5KP70CA-B or Microchip 5KP70CE3/TR13 are required. For applications with minimum operating temperature above -50°C, the Diotec part is suitable.

Q: Why is the 5KP70CE3/TR13 supplied in Tape & Reel packaging?

A: Tape & Reel packaging is standard for high-volume automated assembly. The component specifications remain identical to bulk-packaged alternatives. Selection between bulk and Tape & Reel depends on assembly process requirements and order volume.

Q: Are all substitute parts ROHS3 compliant?

A: The 5KP70CA-B (Littelfuse) and 5KP70CE3/TR13 (Microchip) are ROHS3 compliant. The 5KP70CA (Diotec) lists RoHS status as "Not applicable." Compliance requirements should be verified against specific procurement or regulatory standards applicable to the end application.

Q: What is the peak pulse current rating, and why does it vary among substitutes?

A: Peak pulse current indicates the maximum current the device conducts during a 10/1000µs transient pulse at rated power. The 5KP70CA-B specifies 45.1A, the 5KP70CA specifies 44A, and the 5KP70CE3/TR13 specifies 40A. All values support the 5000W power rating at 70V standoff voltage. Variation reflects different semiconductor manufacturing processes. All are functionally equivalent for general-purpose applications.