CD214B-T45ALF Equivalent & Substitute Parts

Part Overview

The CD214B-T45ALF is a 45V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 72.7V maximum clamping voltage, 8.3A peak pulse current capability, and 600W peak pulse power rating in a DO-214AA (SMB) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Substiute Parts

CD214B-T45ALF

Bourns Inc.In Stock: 1068CD214B-T45ALF Datasheet

Current PartRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

DirectRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

DirectRFQ

SMBJ45A

MDDIn Stock: 46008SMBJ45A Datasheet

DirectRFQ

SMBJ43A-HRA

LittelfuseIn Stock: 1184SMBJ43A-HRA Datasheet

SimilarRFQ

SMBJ45A-HR

Littelfuse Inc.In Stock: 761SMBJ45A-HR Datasheet

SimilarRFQ

TPSMB56A

Littelfuse Inc.In Stock: 4208TPSMB56A Datasheet

SimilarRFQ

TV06B450J-G

Comchip TechnologyIn Stock: 1198TV06B450J-G Datasheet

SimilarRFQ

TV06B450J-HF

Comchip TechnologyIn Stock: 974TV06B450J-HF Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the CD214B-T45ALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

• Voltage - Reverse Standoff (Typ): 45V
• Voltage - Clamping (Max) @ Ipp: 72.7V
• Current - Peak Pulse (10/1000µs): 8.3A
• Power - Peak Pulse: 600W
• Package / Case: DO-214AA, SMB
• Unidirectional Channels: 1

Substitute Categories:

Direct Equivalents match all critical electrical parameters and package specifications with active product status:

• SMBJ45A (MDD) — Identical electrical specifications, active status, improved temperature range

Similar Substitutes maintain compatible electrical performance within acceptable tolerance ranges but may have minor parameter variations:

• SMBJ45A-HR (Littelfuse Inc.) — Identical electrical specifications, extended temperature range (-65°C ~ 150°C), active status
• TV06B450J-HF (Comchip Technology) — 8.25A peak pulse (within tolerance), identical clamping voltage, active status
• TV06B450J-G (Comchip Technology) — 8.25A peak pulse (within tolerance), identical clamping voltage, active status

Partial Compatibility Substitutes provide overvoltage protection with parameter deviations requiring application review:

• SMBJ43A-HRA (Littelfuse) — 43V standoff (2V lower), 69.4V clamping (3.3V lower), 8.7A peak pulse, extended temperature range (-65°C ~ 150°C)
• TPSMB56A (Littelfuse Inc.) — 47.8V standoff (2.8V higher), 77V clamping (4.3V higher), 7.9A peak pulse, automotive-grade with AEC-Q101 qualification

Parameter Comparison

Engineering Selection Recommendations

For Direct Replacement (Preferred): SMBJ45A (MDD) is the primary substitute, offering identical electrical specifications with active product status and improved availability (45,909 units in stock). This part maintains full compatibility with the CD214B-T45ALF across all critical parameters and provides the most straightforward design transition.

For Extended Temperature Applications: SMBJ45A-HR (Littelfuse Inc.) extends the operating temperature range to -65°C ~ 150°C while maintaining identical electrical specifications. This option is suitable for applications requiring enhanced low-temperature performance. Active status and ROHS3 compliance are confirmed.

For Comchip Technology Preference: TV06B450J-HF and TV06B450J-G both provide compatible performance with 8.25A peak pulse current (within tolerance of the 8.3A specification) and identical 72.7V clamping voltage. Both are active products with ROHS3 compliance and adequate inventory availability.

For Voltage Tolerance Variations: SMBJ43A-HRA (Littelfuse) operates at 43V standoff with 69.4V clamping, representing a 2V reduction in standoff voltage and 3.3V reduction in clamping voltage. This part is suitable only for applications where lower voltage thresholds are acceptable. Extended temperature range (-65°C ~ 150°C) and active status are confirmed.

TPSMB56A (Littelfuse Inc.) provides higher voltage protection at 47.8V standoff and 77V clamping, with automotive-grade qualification (AEC-Q101). This option is appropriate for applications requiring higher voltage margins or automotive-grade reliability. Operating temperature extends to 175°C.

Compliance Considerations: All substitute parts maintain ROHS3 compliance and MSL 1 (Unlimited) moisture sensitivity rating. REACH status varies: MDD SMBJ45A is REACH Unaffected, while Littelfuse and Comchip parts are REACH Unaffected or REACH Affected as specified. Verify REACH compliance requirements for your specific application and supply chain.

Frequently Asked Questions (FAQ)

Q: Can SMBJ45A directly replace CD214B-T45ALF without circuit modification? A: Yes. SMBJ45A matches all critical electrical parameters (45V standoff, 72.7V clamping, 8.3A peak pulse, 600W power) and package specification (DO-214AA SMB). No circuit modification is required for direct substitution.

Q: What is the difference between SMBJ45A and SMBJ45A-HR? A: Both parts have identical electrical specifications. The primary difference is operating temperature range: SMBJ45A operates from -50°C to 150°C, while SMBJ45A-HR extends to -65°C. Select SMBJ45A-HR for applications requiring enhanced low-temperature performance.

Q: Are Comchip TV06B450J-HF and TV06B450J-G interchangeable with the original part? A: Both Comchip parts are compatible substitutes. They specify 8.25A peak pulse current compared to the original 8.3A, representing a 0.6% reduction within typical component tolerance. Clamping voltage (72.7V) and all other critical parameters match the original specification.

Q: Can SMBJ43A-HRA be used as a substitute? A: SMBJ43A-HRA provides overvoltage protection but with reduced voltage thresholds: 43V standoff (2V lower) and 69.4V clamping (3.3V lower). This part is suitable only if your application can tolerate lower protection thresholds. Higher peak pulse current (8.7A) and extended temperature range (-65°C ~ 150°C) are available benefits.

Q: What is the advantage of TPSMB56A over other substitutes? A: TPSMB56A provides higher voltage protection (47.8V standoff, 77V clamping) and automotive-grade qualification (AEC-Q101). It also extends operating temperature to 175°C. Select this part for automotive applications or designs requiring higher voltage margins and enhanced reliability certification.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts are ROHS3 compliant and maintain MSL 1 (Unlimited) moisture sensitivity rating, matching the original CD214B-T45ALF specification.

Q: What is the inventory status of substitute parts? A: SMBJ45A (MDD) has the highest availability at 45,909 units in stock. SMBJ45A-HR (Littelfuse) has 741 units, TV06B450J-HF (Comchip) has 960 units, TV06B450J-G (Comchip) has 1,121 units, SMBJ43A-HRA (Littelfuse) has 1,155 units, and TPSMB56A (Littelfuse) has 4,110 units available.

Q: Do all substitute parts use the same DO-214AA SMB package? A: Yes. All substitute parts use the DO-214AA (SMB) package, ensuring mechanical and electrical compatibility with the original CD214B-T45ALF footprint and PCB layout.