CD214A-T85ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T85ALF is a Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection applications. This unidirectional Zener diode operates with an 85V reverse standoff voltage and provides 137V maximum clamping voltage at peak pulse current. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214A-T85ALF

Bourns Inc.In Stock: 1022CD214A-T85ALF Datasheet

Current PartRFQ

SMAJ85A

MDDIn Stock: 36947SMAJ85A Datasheet

DirectRFQ

SMAJ85A

MDDIn Stock: 36947SMAJ85A Datasheet

DirectRFQ

SMA6J85A-TR

STMicroelectronicsIn Stock: 30157SMA6J85A-TR Datasheet

SimilarRFQ

SMAJ85A-TP

Micro Commercial CoIn Stock: 5742SMAJ85A-TP Datasheet

SimilarRFQ

SMAJP4KE91A-TP

Micro Commercial CoIn Stock: 1029SMAJP4KE91A-TP Datasheet

SimilarRFQ

TV04A850J-G

Comchip TechnologyIn Stock: 1083TV04A850J-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD214A-T85ALF are classified based on electrical parameter compatibility within the TVS diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Reverse Standoff Voltage: 85V (±tolerance)
• Voltage - Clamping (Max) @ Ipp: 137V (±tolerance)
• Current - Peak Pulse (10/1000µs): 2.9A (±tolerance)
• Package / Case: DO-214AC, SMA
• Mounting Type: Surface Mount
• Unidirectional Channels: 1

Direct Equivalents maintain all critical electrical parameters within specification limits and identical package configuration.

Similar Substitutes maintain the core voltage and current ratings but may have variations in peak pulse current specifications, clamping voltage, or operating temperature ranges. These parts are functionally compatible for the same application class but require verification of specific circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection:

SMAJ85A (MDD) and SMAJ85A-TP (Micro Commercial Co) are direct electrical equivalents to the CD214A-T85ALF. Both maintain identical reverse standoff voltage (85V), clamping voltage (137V), and peak pulse current (2.9A) specifications. Both are ROHS3 compliant and carry active product status with substantial inventory availability. SMAJ85A-TP offers extended operating temperature range (-55°C ~ 175°C) compared to the original part (-55°C ~ 150°C), providing additional thermal margin for demanding applications.

Alternative Selection:

TV04A850J-G (Comchip Technology) provides equivalent electrical performance with 137V clamping voltage and 2.92A peak pulse current, maintaining the same 85V reverse standoff specification. This part is ROHS3 compliant and active in production.

SMA6J85A-TR (STMicroelectronics) operates at the same 85V reverse standoff voltage but exhibits higher peak pulse current capability (22.5A at 8/20µs pulse) and elevated clamping voltage (146V). This part is suitable for applications requiring enhanced transient energy absorption. Operating temperature range extends to 175°C. REACH status differs from the main part (REACH Unaffected vs. REACH Affected).

Limited Compatibility:

SMAJP4KE91A-TP (Micro Commercial Co) exhibits reduced reverse standoff voltage (77.8V) and lower clamping voltage (125V) compared to the CD214A-T85ALF specification. This part is suitable only for applications with lower voltage thresholds and is not recommended as a direct substitute for the original design.

Frequently Asked Questions (FAQ)

Q: Can SMAJ85A directly replace CD214A-T85ALF in existing designs?

A: Yes. SMAJ85A maintains identical electrical specifications: 85V reverse standoff, 137V clamping voltage, and 2.9A peak pulse current. Both are unidirectional Zener TVS diodes in DO-214AC (SMA) surface mount packages. The part is ROHS3 compliant and carries active product status.

Q: What is the difference between SMAJ85A and SMAJ85A-TP?

A: Both parts are electrically identical with 85V reverse standoff and 137V clamping voltage. SMAJ85A-TP offers extended operating temperature range (-55°C ~ 175°C) versus SMAJ85A (-50°C ~ 150°C). SMAJ85A-TP is supplied in Tape & Reel packaging, while SMAJ85A packaging is specified as Tape & Reel (TR).

Q: Why is SMA6J85A-TR listed as a similar substitute rather than direct equivalent?

A: SMA6J85A-TR maintains the 85V reverse standoff voltage but differs in peak pulse current specification (22.5A at 8/20µs versus 2.9A at 10/1000µs) and clamping voltage (146V versus 137V). These differences reflect different pulse waveform testing standards. The part is suitable for applications requiring higher transient energy absorption but requires circuit-level verification.

Q: Is SMAJP4KE91A-TP compatible with CD214A-T85ALF?

A: SMAJP4KE91A-TP is not recommended as a direct substitute. The part operates at 77.8V reverse standoff voltage and 125V clamping voltage, both lower than the original specification (85V and 137V respectively). Use this part only in applications specifically designed for lower voltage thresholds.

Q: What packaging formats are available for substitute parts?

A: All substitute parts are supplied in DO-214AC (SMA) surface mount packages. Packaging options include Tape & Reel (TR) for SMAJ85A, SMAJ85A-TP, SMA6J85A-TR, and TV04A850J-G, and Bulk packaging for SMAJP4KE91A-TP. Tape & Reel packaging is standard for automated assembly processes.

Q: Are all substitute parts RoHS compliant?

A: SMAJ85A, SMAJ85A-TP, SMA6J85A-TR, and TV04A850J-G are ROHS3 compliant. SMAJP4KE91A-TP RoHS status is not specified in available documentation.

Q: Which substitute offers the best inventory availability?

A: SMAJ85A (MDD) provides the highest inventory level at 36,900 pieces. SMA6J85A-TR (STMicroelectronics) offers 30,100 pieces. SMAJ85A-TP (Micro Commercial Co) provides 5,713 pieces. All three are suitable for volume production requirements.