P6KE12-B Equivalent & Substitute Parts

Part Overview

The P6KE12-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This unidirectional Zener diode operates with a reverse standoff voltage of 10.2V and provides clamping at 17.54V maximum. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and new design implementations.

Substiute Parts

P6KE12-B

Littelfuse Inc.In Stock: 1203P6KE12-B Datasheet

Current PartRFQ

P6KE12A

Fairchild SemiconductorIn Stock: 3416P6KE12A Datasheet

DirectRFQ

P6KE12A-B

LittelfuseIn Stock: 1141P6KE12A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P6KE12-B is determined by the following critical electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - Reverse Standoff (Typ): 10.2V (must match)
• Voltage - Breakdown (Min): 10.8V minimum (must meet or exceed)
• Voltage - Clamping (Max) @ Ipp: must not exceed 17.54V
• Power - Peak Pulse: 600W (must match)
• Type: Zener, Unidirectional (must match)

Mechanical Compatibility Criteria:

• Mounting Type: Through Hole (must match)
• Package / Case: DO-204AC, DO-15, Axial (must match)

Compliance Criteria:

• RoHS Status: ROHS3 Compliant (preferred)
• Product Status: Active status preferred for long-term availability

The identified substitute parts meet all electrical parameters within the specified tolerances and maintain identical mechanical packaging, ensuring direct functional replacement in existing circuit designs.

Parameter Comparison

Engineering Selection Recommendations

P6KE12A-B (Littelfuse) - Primary Substitute: This part is the preferred replacement for the obsolete P6KE12-B. Both are manufactured by Littelfuse Inc. and share identical reverse standoff voltage (10.2V), operating temperature range (-55°C ~ 175°C), and RoHS3 compliance status. The clamping voltage is reduced to 16.7V, which provides improved transient suppression performance. The part maintains active product status, ensuring long-term availability and supply chain continuity.

P6KE12A (Fairchild Semiconductor) - Secondary Substitute: This part provides electrical equivalence with matching reverse standoff voltage (10.2V) and identical power rating (600W). The clamping voltage is also 16.7V. However, the operating temperature range is limited to -50°C ~ 175°C (versus -55°C ~ 175°C for the main part), and RoHS compliance status is not specified. This part is suitable for applications where the reduced low-temperature operating limit is acceptable.

Both substitute parts maintain identical mechanical packaging (DO-204AC/DO-15 axial through-hole) and are directly compatible with existing PCB layouts and circuit designs.

Frequently Asked Questions (FAQ)

Q: Can P6KE12A-B be used as a direct replacement for P6KE12-B? A: Yes. Both parts share the same reverse standoff voltage (10.2V), power rating (600W), mounting type (through-hole), and package (DO-204AC/DO-15). The P6KE12A-B is manufactured by the same company (Littelfuse) and maintains identical operating temperature range and RoHS3 compliance.

Q: What is the difference between the clamping voltages? A: The P6KE12-B clamps at 17.54V maximum, while both substitute parts (P6KE12A and P6KE12A-B) clamp at 16.7V maximum. The lower clamping voltage in the substitutes provides faster transient suppression and better protection characteristics.

Q: Are there any temperature range limitations with the substitutes? A: The P6KE12A-B maintains the full operating range of -55°C ~ 175°C, matching the original part. The P6KE12A has a minimum operating temperature of -50°C instead of -55°C, which may be a consideration for applications requiring extended low-temperature operation.

Q: Do the substitute parts have the same package dimensions? A: Yes. All parts use the DO-204AC (DO-15) axial through-hole package with identical mechanical specifications, ensuring compatibility with existing PCB layouts without modification.

Q: What is the product status significance? A: The P6KE12-B is obsolete, meaning Littelfuse no longer manufactures it. Both substitute parts have active status, ensuring continued availability from component distributors and manufacturers for future orders and system support.

Q: Are the substitute parts RoHS compliant? A: The P6KE12A-B is ROHS3 compliant, matching the original part. The P6KE12A compliance status is not specified in the available data.