5KP12C-B Equivalent & Substitute Parts

Part Overview

The 5KP12C-B is a bidirectional Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient protection applications. This component features a 12V reverse standoff voltage, 20.9V maximum clamping voltage, and 5000W peak pulse power rating in a P600 axial through-hole package. The 5KP12C-B is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

5KP12C-B

Littelfuse Inc.In Stock: 11975KP12C-B Datasheet

Current PartRFQ

5KP12CA

Littelfuse Inc.In Stock: 64385KP12CA Datasheet

DirectRFQ

5KP12CA-B

Littelfuse Inc.In Stock: 9655KP12CA-B Datasheet

DirectRFQ

SLD12-018-B

Littelfuse Inc.In Stock: 1002SLD12-018-B Datasheet

MFR RecommendedRFQ

5KP12CE3/TR13

Microchip TechnologyIn Stock: 12215KP12CE3/TR13 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 5KP12C-B is determined by the following critical parameters:

• Voltage - Reverse Standoff (Typ): 12V
• Voltage - Clamping (Max) @ Ipp: Within acceptable tolerance range
• Power - Peak Pulse: 5000W (5kW)
• Bidirectional Channels: 1
• Mounting Type: Through Hole
• Package / Case: P600, Axial
• Operating Temperature Range: -55°C ~ 175°C (TJ)

Substitute parts must maintain identical reverse standoff voltage, equivalent peak pulse power rating, and compatible package specifications. Clamping voltage variations within the 19.9V to 22V range are acceptable for general-purpose transient protection applications, as these values remain within the protective envelope for 12V nominal systems.

Parameter Comparison

Engineering Selection Recommendations

All substitute parts listed maintain active product status, ensuring long-term availability and manufacturing support. The 5KP12CA and 5KP12CA-B are direct Littelfuse Inc. successors with identical electrical specifications and package compatibility. Both parts feature lower clamping voltage (19.9V) compared to the original 5KP12C-B (20.9V), providing improved transient suppression performance while maintaining the same reverse standoff voltage and peak pulse power rating.

The SLD12-018-B represents the manufacturer-recommended upgrade path, offering automotive-grade qualification (AEC-Q101) with identical electrical and package specifications. This part is suitable for applications requiring automotive-level reliability and traceability.

The 5KP12CE3/TR13 from Microchip Technology provides functional equivalence with a higher clamping voltage (22V) and is available in Tape & Reel packaging. This part maintains all critical electrical parameters and thermal specifications, with the primary distinction being the higher clamping voltage and alternative packaging format.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 5KP12C-B with 5KP12CA or 5KP12CA-B?

A: Yes. Both parts share identical reverse standoff voltage (12V), peak pulse power (5000W), operating temperature range (-55°C to 175°C), and P600 axial through-hole package specifications. The lower clamping voltage (19.9V vs. 20.9V) provides equivalent or improved transient protection for 12V nominal systems.

Q: What is the difference between 5KP12CA and 5KP12CA-B?

A: Both parts are electrically identical. The primary difference is packaging: 5KP12CA is supplied in Cut Tape (CT) format, while 5KP12CA-B is supplied in Bulk packaging. Selection depends on procurement and assembly requirements.

Q: When should I use SLD12-018-B instead of 5KP12CA?

A: SLD12-018-B is the appropriate choice for automotive applications or designs requiring AEC-Q101 qualification. Electrical specifications are identical to 5KP12CA, but SLD12-018-B includes automotive-grade manufacturing and traceability documentation.

Q: Is 5KP12CE3/TR13 from Microchip Technology a suitable replacement?

A: Yes, for applications where the higher clamping voltage (22V) is acceptable. This part maintains the same reverse standoff voltage, peak pulse power, and thermal specifications. The primary consideration is the 2.1V higher clamping voltage, which may affect transient suppression characteristics in voltage-sensitive circuits.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance of the original 5KP12C-B.

Q: What packaging options are available for these substitutes?

A: 5KP12CA is available in Cut Tape (CT), 5KP12CA-B in Bulk, and 5KP12CE3/TR13 in Tape & Reel (TR). Selection depends on production volume and assembly line requirements.