P4KE91CA-B Equivalent & Substitute Parts

Part Overview

The P4KE91CA-B is an active Transient Voltage Suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose transient voltage protection applications. This bidirectional Zener diode operates in the DO-204AL (DO-41) axial through-hole package and provides 125V clamping voltage with 3.3A peak pulse current capability. The part is ROHS3 compliant and maintains unlimited moisture sensitivity rating (MSL 1). Finding equivalent substitute parts is necessary when managing supply chain continuity, optimizing procurement costs, or addressing inventory constraints while maintaining identical electrical and mechanical performance.

Substiute Parts

P4KE91CA-B

Littelfuse Inc.In Stock: 903P4KE91CA-B Datasheet

Current PartRFQ

P4KE91CA

Taiwan Semiconductor CorporationIn Stock: 904P4KE91CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P4KE91CA-B are qualified based on strict electrical and mechanical parameter matching within the P4KE series. The substitution criteria are:

• Identical Voltage - Reverse Standoff (Typ): 77.8V
• Identical Voltage - Breakdown (Min): 86.5V
• Identical Voltage - Clamping (Max) @ Ipp: 125V
• Identical Current - Peak Pulse (10/1000µs): 3.3A
• Identical Power - Peak Pulse: 400W
• Identical Operating Temperature Range: -55°C ~ 175°C (TJ)
• Identical Package / Case: DO-204AL, DO-41, Axial
• Identical Mounting Type: Through Hole
• Identical RoHS Status: ROHS3 Compliant
• Identical Moisture Sensitivity Level: 1 (Unlimited)

The primary differentiator between the main part and substitute is packaging format: the main part is supplied in Bulk packaging, while the substitute is supplied in Tape & Reel (TR) format. Both maintain identical electrical performance and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both the P4KE91CA-B and P4KE91CA are active products with identical electrical specifications and mechanical compatibility. Selection between these parts should be based on packaging requirements and procurement workflow:

• P4KE91CA-B (Littelfuse Inc., Bulk): Select when manual component handling, small-quantity assembly, or direct component verification is required.
• P4KE91CA (Taiwan Semiconductor Corporation, Tape & Reel): Select when automated pick-and-place assembly, high-volume production, or tape-reel handling equipment is available.

Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating, ensuring regulatory and environmental compatibility across applications. The choice between manufacturers and packaging formats does not affect electrical performance or thermal characteristics in the specified operating range of -55°C to 175°C (TJ).

Frequently Asked Questions (FAQ)

Q: Can P4KE91CA (Tape & Reel) be used as a direct replacement for P4KE91CA-B (Bulk)?

A: Yes. Both parts are electrically and mechanically identical. The only difference is packaging format. Tape & Reel format is suitable for automated assembly lines, while Bulk format is suitable for manual assembly or component verification workflows.

Q: Are there any thermal performance differences between these parts?

A: No. Both parts operate across the identical temperature range of -55°C to 175°C (TJ) with identical power dissipation characteristics (400W peak pulse power).

Q: Do both parts meet the same compliance standards?

A: Yes. Both P4KE91CA-B and P4KE91CA are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. REACH status is unaffected for both parts.

Q: What is the significance of the voltage parameters for substitution?

A: The three voltage parameters—Reverse Standoff (77.8V), Breakdown (86.5V), and Clamping (125V)—define the protection threshold and response characteristics. Substitutes must match these values exactly to ensure identical transient suppression performance in the circuit.

Q: Can these parts be used interchangeably in automated assembly?

A: P4KE91CA in Tape & Reel format is optimized for automated pick-and-place assembly. P4KE91CA-B in Bulk format requires manual handling. Verify your assembly equipment compatibility before selecting the packaging format.

Q: Are there any package compatibility concerns?

A: No. Both parts use the DO-204AL (DO-41) axial through-hole package with identical mechanical dimensions and pin configuration, ensuring direct PCB compatibility.