P6KE91CA-B Equivalent & Substitute Parts

Part Overview

The P6KE91CA-B is a transient voltage suppressor (TVS) diode manufactured by Diodes Incorporated, designed for general-purpose voltage clamping applications. This through-hole component operates with a reverse standoff voltage of 77.8V and provides 125V clamping at peak pulse current. The part is currently active in production with 1087 units in stock and carries ROHS3 compliance certification.

Equivalent and substitute parts are identified when they maintain identical or functionally compatible electrical and mechanical parameters within the allowed specifications for TVS diode applications. Substitutes enable procurement flexibility, support supply chain continuity, and provide alternative sourcing options while maintaining circuit performance.

Substiute Parts

P6KE91CA-B

Diodes IncorporatedIn Stock: 1141P6KE91CA-B Datasheet

Current PartRFQ

P6KE91CA

Fairchild SemiconductorIn Stock: 1735P6KE91CA Datasheet

MFR RecommendedRFQ

TP6KE91CA

Littelfuse Inc.In Stock: 9603TP6KE91CA Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6KE91CA-B are qualified based on the following critical parameters:

• Voltage - Reverse Standoff (Typ): 77.8V
• Voltage - Breakdown (Min): 86.5V
• Voltage - Clamping (Max) @ Ipp: 125V
• Current - Peak Pulse (10/1000µs): within 4.8A to 5A range
• Power - Peak Pulse: 600W
• Package / Case: DO-204AC or DO-15 (axial through-hole)
• Type: Zener diode, single bidirectional channel
• Applications: General Purpose

Substitutes must maintain identical voltage specifications and support equivalent or higher peak pulse current ratings. Package compatibility requires DO-15 or DO-204AC form factors for direct board-level replacement. All identified substitutes meet these criteria and are classified as active products with current manufacturing status.

Parameter Comparison

Engineering Selection Recommendations

All three parts maintain identical voltage specifications (77.8V standoff, 86.5V breakdown, 125V clamping) and are suitable for direct substitution in general-purpose TVS applications. Peak pulse current ratings vary minimally (4.8A to 5A), with all parts rated at 600W peak pulse power.

The P6KE91CA (Fairchild Semiconductor) operates across a slightly narrower temperature range (-50 to 175°C) compared to the primary part and substitute TP6KE91CA. Both the P6KE91CA-B and TP6KE91CA maintain the full -55 to 175°C operating range.

The TP6KE91CA (Littelfuse Inc.) carries AEC-Q101 automotive qualification and ROHS3 compliance, making it suitable for applications requiring automotive-grade components. All parts are active products with current manufacturing status and adequate inventory availability.

Frequently Asked Questions (FAQ)

Q: Can P6KE91CA (Fairchild) be used as a direct replacement for P6KE91CA-B (Diodes Inc.)?

A: Yes. Both parts share identical voltage specifications (77.8V standoff, 86.5V breakdown, 125V clamping), equivalent peak pulse current (4.8A vs. 5A), and identical package form factors (DO-15/DO-204AC). The Fairchild part operates across a narrower temperature range (-50 to 175°C vs. -55 to 175°C), which is acceptable for most general-purpose applications.

Q: What is the difference between TP6KE91CA and P6KE91CA-B?

A: Both parts are electrically equivalent with identical voltage ratings and 600W peak pulse power. The TP6KE91CA (Littelfuse) includes AEC-Q101 automotive qualification and operates across the full -55 to 175°C temperature range. Peak pulse current is 4.9A (TP6KE91CA) versus 4.8A (P6KE91CA-B), a negligible difference for circuit performance.

Q: Are all substitute parts available in DO-15 packaging?

A: Yes. All three parts are specified for DO-15 (DO-204AC) axial through-hole packaging, enabling direct board-level replacement without layout modifications.

Q: Which substitute part should be selected for automotive applications?

A: The TP6KE91CA (Littelfuse Inc.) is qualified to AEC-Q101 automotive standards and is the appropriate choice for automotive-grade circuit protection requirements.

Q: Do all parts meet ROHS3 compliance?

A: The P6KE91CA-B (Diodes Inc.) and TP6KE91CA (Littelfuse Inc.) are both ROHS3 compliant. Compliance status for the P6KE91CA (Fairchild Semiconductor) is not specified in available documentation.