CD214B-T24ALF Equivalent & Substitute Parts

Part Overview

The CD214B-T24ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 24V reverse standoff voltage with a 38.9V maximum clamping voltage and 15.4A peak pulse current capability in the DO-214AA (SMB) package. The part is classified as obsolete, making identification of active equivalent and substitute components essential for ongoing design support and procurement.

Substiute Parts

CD214B-T24ALF

Bourns Inc.In Stock: 878CD214B-T24ALF Datasheet

Current PartRFQ

SMBJ24A

MDDIn Stock: 41210SMBJ24A Datasheet

DirectRFQ

SMBJ24A

MDDIn Stock: 41210SMBJ24A Datasheet

DirectRFQ

SMBJ24A

MDDIn Stock: 41210SMBJ24A Datasheet

DirectRFQ

SMBJ24A-TP

Micro Commercial CoIn Stock: 6405SMBJ24A-TP Datasheet

SimilarRFQ

SMBJ24A-TR

STMicroelectronicsIn Stock: 1704SMBJ24A-TR Datasheet

SimilarRFQ

SMBJ28A-HRA

Littelfuse Inc.In Stock: 1018SMBJ28A-HRA Datasheet

SimilarRFQ

SMBJ30A-HRA

Littelfuse Inc.In Stock: 1057SMBJ30A-HRA Datasheet

SimilarRFQ

SMBJ30A-M3/52

Vishay General Semiconductor - Diodes DivisionIn Stock: 8413SMBJ30A-M3/52 Datasheet

SimilarRFQ

TPSMB30A

Littelfuse Inc.In Stock: 1466TPSMB30A Datasheet

SimilarRFQ

TV06B240J-G

Comchip TechnologyIn Stock: 9310TV06B240J-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD214B-T24ALF is determined by strict alignment of the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 24V
• Voltage - Clamping (Max) @ Ipp: 38.9V
• Voltage - Breakdown (Min): 26.7V
• Current - Peak Pulse (10/1000µs): 15.4A minimum
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA (SMB)
• Unidirectional Channels: 1
• Mounting Type: Surface Mount

Parts are grouped into two categories:

Direct Equivalents: Parts with identical electrical specifications (24V standoff, 38.9V clamping, 15.4A+ peak pulse) and active product status. These provide one-to-one replacement capability.

Similar Alternatives: Parts with voltage ratings within the general 24-30V standoff range and comparable clamping characteristics. These may require circuit validation due to variations in peak pulse current or clamping voltage but maintain functional compatibility for general-purpose overvoltage protection applications.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Substitutes (Identical Electrical Specifications):

SMBJ24A (MDD), SMBJ24A-TP (Micro Commercial Co), SMBJ24A-TR (STMicroelectronics), and TV06B240J-G (Comchip Technology) are direct electrical equivalents with 24V standoff voltage, 38.9V clamping voltage, and peak pulse currents of 15.4A or greater. All are active products with ROHS3 compliance and MSL 1 rating. Selection among these should be based on availability, packaging format (tape & reel vs. cut tape), and supply chain requirements.

Alternative Voltage Ratings (Circuit Validation Required):

SMBJ28A-HRA, SMBJ30A-HRA, SMBJ30A-M3/52, and TPSMB30A operate at higher standoff voltages (28V to 30V) with correspondingly higher clamping voltages. These are suitable only where the protected circuit can tolerate the elevated voltage thresholds. TPSMB30A includes AEC-Q101 automotive qualification and extended temperature range (-65 to 175°C), making it applicable to automotive and high-reliability applications.

All substitute parts maintain the DO-214AA (SMB) package format, surface-mount configuration, and 600W peak pulse power rating, ensuring mechanical and thermal compatibility with the original design footprint.

Frequently Asked Questions (FAQ)

Q: Can SMBJ24A directly replace CD214B-T24ALF?

A: Yes. SMBJ24A from MDD provides identical electrical specifications: 24V standoff voltage, 38.9V clamping voltage, and 15.5A peak pulse current. Both use the DO-214AA (SMB) package. SMBJ24A is an active product with ROHS3 compliance, making it a direct substitute.

Q: What is the difference between SMBJ24A-TP and SMBJ24A-TR?

A: Both are 24V standoff TVS diodes in DO-214AA packages with 38.9V clamping voltage. SMBJ24A-TP (Micro Commercial Co) operates from -55 to 175°C and includes tape & reel packaging. SMBJ24A-TR (STMicroelectronics) operates from -55 to 150°C with 16A peak pulse current and uses cut tape & Digi-Reel packaging. Selection depends on temperature requirements and packaging format preference.

Q: Can I use SMBJ28A-HRA or SMBJ30A-HRA as substitutes?

A: These parts have higher standoff voltages (28V and 30V respectively) and higher clamping voltages (45.4V and 48.4V). They are not direct substitutes but may function in circuits designed to tolerate higher protection thresholds. Circuit validation is required to confirm compatibility with the protected circuit's voltage specifications.

Q: Why is TPSMB30A listed as a similar alternative?

A: TPSMB30A operates at 25.6V standoff with 41.4V clamping voltage, placing it between the 24V and 30V options. It includes AEC-Q101 automotive qualification and operates across -65 to 175°C, making it suitable for automotive and extended-temperature applications. The higher voltage rating requires circuit validation.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance and MSL 1 (unlimited moisture sensitivity) ratings, matching the environmental and regulatory status of the original CD214B-T24ALF.

Q: What packaging formats are available?

A: All parts use the DO-214AA (SMB) surface-mount package. Packaging options include tape & reel (TR), cut tape (CT), and bulk formats. Verify packaging format with your supplier to match assembly requirements.