P6KE9.1-B Equivalent & Substitute Parts

Part Overview

The P6KE9.1-B is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose voltage clamping applications. This unidirectional Zener diode operates with a reverse standoff voltage of 7.78V and provides peak pulse power handling of 600W in a through-hole DO-204AC (DO-15) axial package. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing system support and new designs requiring this voltage suppression specification.

Substiute Parts

P6KE9.1-B

Littelfuse Inc.In Stock: 1244P6KE9.1-B Datasheet

Current PartRFQ

P6KE9.1A

Taiwan Semiconductor CorporationIn Stock: 300384P6KE9.1A Datasheet

DirectRFQ

P6KE9.1A-B

Littelfuse Inc.In Stock: 1107P6KE9.1A-B Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the P6KE9.1-B must maintain electrical and mechanical compatibility based on the following critical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage: 7.78V (Typ)
• Breakdown voltage minimum: within acceptable range for 9.1V class devices
• Clamping voltage: maximum 14.07V or lower
• Peak pulse power: 600W minimum
• Unidirectional configuration: single channel Zener type

Mechanical Compatibility Criteria:

• Package type: DO-204AC (DO-15) axial through-hole
• Mounting: through-hole compatible
• Operating temperature range: -55°C ~ 175°C (TJ)

Compliance Requirements:

• RoHS3 compliance maintained
• Moisture sensitivity level: 1 (Unlimited)

The substitute parts P6KE9.1A-B and P6KE9.1A meet these criteria while offering active product status and improved availability compared to the obsolete P6KE9.1-B.

Parameter Comparison

Engineering Selection Recommendations

P6KE9.1A-B (Littelfuse Inc.): This substitute maintains Littelfuse manufacturing continuity with active product status. The clamping voltage of 13.4V is lower than the original 14.07V, providing enhanced protection margins. Peak pulse current specification of 45.5A is documented. RoHS3 compliance and identical operating temperature range ensure regulatory and thermal compatibility. Bulk packaging is available.

P6KE9.1A (Taiwan Semiconductor Corporation): This substitute offers the same electrical specifications as P6KE9.1A-B with peak pulse current of 47A. Active product status and RoHS3 compliance are maintained. REACH unaffected status is documented. Higher inventory availability (300,300 pcs) supports supply chain continuity.

Both substitutes are electrically and mechanically compatible with the obsolete P6KE9.1-B, with the primary advantage being improved clamping voltage performance (13.4V vs. 14.07V) and confirmed active product status.

Frequently Asked Questions (FAQ)

Q: Can P6KE9.1A-B or P6KE9.1A be used as direct replacements for P6KE9.1-B?

A: Yes. Both substitutes maintain the same reverse standoff voltage (7.78V), identical package type (DO-204AC/DO-15 axial), through-hole mounting compatibility, and 600W peak pulse power rating. The lower clamping voltage (13.4V vs. 14.07V) provides equivalent or improved circuit protection.

Q: What is the difference between P6KE9.1A-B and P6KE9.1A?

A: Both parts are electrically identical with the same clamping voltage (13.4V) and operating temperature range. P6KE9.1A-B is manufactured by Littelfuse Inc. in bulk packaging, while P6KE9.1A is manufactured by Taiwan Semiconductor Corporation. Peak pulse current specifications differ slightly (45.5A vs. 47A), both within acceptable operating parameters.

Q: Are there any package or mounting differences?

A: No. All three parts use the DO-204AC (DO-15) axial through-hole package with identical mechanical dimensions and mounting compatibility.

Q: What compliance certifications apply to the substitute parts?

A: Both P6KE9.1A-B and P6KE9.1A are RoHS3 compliant with moisture sensitivity level 1 (unlimited). P6KE9.1A additionally carries REACH unaffected status.

Q: Why is the clamping voltage lower on the substitute parts?

A: The P6KE9.1A variants specify a maximum clamping voltage of 13.4V compared to 14.07V on the original P6KE9.1-B. This represents a tighter voltage specification within the same 9.1V class device, providing enhanced transient suppression performance.