P4KE36C-B Equivalent & Substitute Parts

Part Overview

The P4KE36C-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection applications. This bidirectional Zener diode operates in the DO-204AL (DO-41) axial package and provides 52.4V clamping voltage with 8.2A peak pulse current capability. The part is classified as obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

P4KE36C-B

Littelfuse Inc.In Stock: 1144P4KE36C-B Datasheet

Current PartRFQ

P4KE36CA

Taiwan Semiconductor CorporationIn Stock: 100216P4KE36CA Datasheet

DirectRFQ

P4KE36CA-B

Littelfuse Inc.In Stock: 889P4KE36CA-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the P4KE36C-B is determined by the following critical parameters that must remain consistent across equivalent parts:

• Reverse Standoff Voltage (Typ): 30.8V — defines the normal operating voltage threshold
• Bidirectional Channels: 1 — specifies single-channel protection topology
• Mounting Type: Through Hole — ensures mechanical compatibility
• Package / Case: DO-204AL (DO-41) Axial — maintains footprint and lead configuration
• Operating Temperature Range: -55°C ~ 175°C (TJ) — ensures thermal compatibility
• RoHS Compliance: ROHS3 Compliant — meets environmental standards

Acceptable variations within substitution criteria include:

• Voltage - Clamping (Max) @ Ipp: Minor variations (49.9V to 52.4V) are acceptable provided the clamping voltage does not exceed the original specification
• Current - Peak Pulse (10/1000µs): Variations (8.2A to 8.4A) are acceptable provided the current rating meets or exceeds the original specification
• Voltage - Breakdown (Min): Variations (32.4V to 34.2V) are acceptable within the P4KE series tolerance band
• Product Status: Active status is preferred for obsolete parts to ensure continued availability

Parameter Comparison

Engineering Selection Recommendations

P4KE36CA (Taiwan Semiconductor Corporation) — Active product status with full ROHS3 compliance and REACH unaffected designation. Clamping voltage of 49.9V is lower than the original 52.4V specification, providing enhanced protection margin. Peak pulse current of 8.4A exceeds the original 8.2A rating. Supplied in Tape & Reel packaging with 100,200 units in stock.

P4KE36CA-B (Littelfuse Inc.) — Active product status from the original manufacturer with full ROHS3 compliance and REACH unaffected designation. Clamping voltage of 49.9V is lower than the original 52.4V specification. Peak pulse current matches the original 8.2A rating. Supplied in Bulk packaging with 837 units in stock. Maintains manufacturer continuity with the obsolete P4KE36C-B.

Both substitutes maintain identical reverse standoff voltage (30.8V), bidirectional channel configuration (1), operating temperature range (-55°C ~ 175°C), and DO-204AL axial package specification. Selection between substitutes depends on packaging requirements and manufacturer preference.

Frequently Asked Questions (FAQ)

Q: Can P4KE36CA or P4KE36CA-B be used as direct replacements for P4KE36C-B?

A: Yes. Both parts maintain the critical electrical parameters: 30.8V reverse standoff voltage, 1 bidirectional channel, 400W peak pulse power, and identical operating temperature range. The DO-204AL axial package ensures mechanical compatibility without PCB redesign.

Q: What is the significance of the lower clamping voltage (49.9V) in the substitute parts?

A: The lower clamping voltage in P4KE36CA and P4KE36CA-B (49.9V versus 52.4V) represents a tighter voltage clamp, providing enhanced transient suppression performance. This is a favorable characteristic for overvoltage protection applications.

Q: Are there packaging differences between the substitutes?

A: P4KE36CA is supplied in Tape & Reel (TR) packaging, suitable for automated assembly. P4KE36CA-B is supplied in Bulk packaging. Both use the same DO-204AL (DO-41) axial component form factor for through-hole mounting.

Q: Do the substitute parts meet the same compliance standards as the original?

A: Yes. Both P4KE36CA and P4KE36CA-B are ROHS3 compliant with MSL rating of 1 (Unlimited). P4KE36CA additionally carries REACH unaffected designation, as does P4KE36CA-B.

Q: Why is the original P4KE36C-B classified as obsolete?

A: Obsolescence typically reflects manufacturer discontinuation decisions. The active substitute parts P4KE36CA and P4KE36CA-B provide equivalent or superior performance characteristics and ensure continued supply for new designs and production.

Q: What is the difference between P4KE36C-B and P4KE36CA-B from Littelfuse?

A: Both are Littelfuse products in the P4KE series with identical reverse standoff voltage (30.8V) and operating temperature range. The primary difference is clamping voltage: P4KE36C-B clamps at 52.4V (obsolete), while P4KE36CA-B clamps at 49.9V (active). The "CA" designation indicates the revised clamping specification.