P6SMB22A-Q Equivalent & Substitute Parts

Part Overview

The P6SMB22A-Q is an active-status unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc. in the DO-214AA (SMB) surface mount package. This component is designed for telecom applications requiring transient voltage protection with a reverse standoff voltage of 18.8V and peak pulse current handling of 19.9A. The part is AEC-Q101 qualified and RoHS3 compliant, making it suitable for automotive-grade applications.

Equivalent and substitute parts are identified when components share compatible electrical parameters (reverse standoff voltage, breakdown voltage, clamping voltage, and peak pulse current) and identical mechanical specifications (package type, mounting method, and thermal operating range) while maintaining equivalent functional performance in circuit protection applications.

Substiute Parts

P6SMB22A-Q

Bourns Inc.In Stock: 746P6SMB22A-Q Datasheet

Current PartRFQ

SMBJE18AH

Eaton - Electronics DivisionIn Stock: 3385SMBJE18AH Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the P6SMB22A-Q is determined by strict alignment of the following critical parameters:

Electrical Compatibility Criteria:

• Reverse standoff voltage within the range of 18V to 18.8V
• Breakdown voltage minimum between 20V and 20.9V
• Clamping voltage maximum between 29.2V and 30.6V at peak pulse current
• Peak pulse current (10/1000µs) between 19.9A and 20.6A
• Peak pulse power rating of 600W

Mechanical Compatibility Criteria:

• Package type: DO-214AA (SMB) surface mount only
• Mounting method: Surface mount
• Operating temperature range: -55°C to 150°C (TJ)
• Unidirectional configuration (single channel)

Compliance & Qualification Criteria:

• Automotive grade classification
• AEC-Q101 qualification
• RoHS3 compliance
• REACH unaffected status

The SMBJE18AH from Eaton - Electronics Division meets all substitution criteria and is classified as a manufacturer-recommended equivalent.

Parameter Comparison

Engineering Selection Recommendations

Primary Selection: P6SMB22A-Q (Bourns Inc.)

The P6SMB22A-Q is the specified component with active product status and 702 units in current inventory. This part carries full AEC-Q101 automotive qualification and RoHS3 compliance, meeting all regulatory requirements for telecom protection applications.

Equivalent Alternative: SMBJE18AH (Eaton - Electronics Division)

The SMBJE18AH is a manufacturer-recommended equivalent with active product status and 3,369 units in inventory. This part maintains identical mechanical compatibility (DO-214AA SMB package, surface mount configuration) and equivalent electrical performance within specified tolerances. The SMBJE18AH exhibits a clamping voltage of 29.2V (0.8V lower than the primary part) and peak pulse current of 20.6A (0.7A higher than the primary part), both within acceptable substitution ranges for telecom transient protection circuits.

Both parts are automotive-grade, AEC-Q101 qualified, RoHS3 compliant, and operate across the identical temperature range (-55°C to 150°C TJ). Selection between these parts is based on inventory availability, lead time requirements, and established supply chain preferences.

Frequently Asked Questions (FAQ)

Q: Can the SMBJE18AH directly replace the P6SMB22A-Q in existing designs?

A: Yes. Both parts are unidirectional TVS diodes in the DO-214AA (SMB) surface mount package with identical mechanical footprints, mounting methods, and operating temperature ranges. Electrical parameters are within compatible substitution ranges for telecom protection applications.

Q: What is the significance of the clamping voltage difference (30.6V vs. 29.2V)?

A: The clamping voltage represents the maximum voltage across the diode during peak pulse current. The SMBJE18AH clamps at 29.2V compared to the P6SMB22A-Q at 30.6V. This 0.8V difference is within acceptable tolerance for transient suppression in telecom circuits and does not affect functional compatibility.

Q: Are both parts qualified for automotive applications?

A: Yes. Both the P6SMB22A-Q and SMBJE18AH carry automotive-grade classification and AEC-Q101 qualification, meeting automotive industry reliability and quality standards.

Q: Do both parts meet current environmental compliance requirements?

A: Yes. Both parts are RoHS3 compliant and REACH unaffected, meeting current environmental and regulatory requirements for electronic component manufacturing and distribution.

Q: What is the difference in peak pulse current handling?

A: The P6SMB22A-Q handles 19.9A peak pulse current, while the SMBJE18AH handles 20.6A. The SMBJE18AH provides 0.7A additional current capacity, making it suitable for applications requiring higher transient current suppression.

Q: Are there any package or pinout differences between these parts?

A: No. Both parts use the DO-214AA (SMB) surface mount package with identical pinout and mechanical dimensions, ensuring direct PCB footprint compatibility.

Q: What is the moisture sensitivity level for both parts?

A: Both parts have a Moisture Sensitivity Level (MSL) of 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.