CD214C-T90ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T90ALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This unidirectional Zener diode features a 90V reverse standoff voltage with 146V maximum clamping voltage and 10.3A peak pulse current capability. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued circuit protection functionality.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	90V
Voltage - Breakdown (Min)	100V
Voltage - Clamping (Max) @ Ipp	146V
Current - Peak Pulse (10/1000µs)	10.3A
Power - Peak Pulse	1500W
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Type	Zener
Unidirectional Channels	1

Substitute Part Grouping Explanation

Substitute parts for the CD214C-T90ALF are categorized into two groups based on electrical and mechanical compatibility:

Direct Equivalents (Identical Specifications): Parts maintaining all key electrical parameters—90V reverse standoff, 100V minimum breakdown, 146V maximum clamping, and 10.3A peak pulse current—with 1500W peak pulse power and DO-214AB/SMC package compatibility. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Alternatives (Enhanced Specifications): Parts sharing the same voltage ratings and package but with higher peak pulse current (34.3A) and power dissipation (5000W). These parts provide superior transient protection capability and are mechanically compatible but deliver enhanced performance characteristics.

Substitution eligibility is determined by:

Voltage - Reverse Standoff: 90V (required)
Voltage - Clamping (Max) @ Ipp: 146V (required)
Package / Case: DO-214AB, SMC (required)
Mounting Type: Surface Mount (required)
Operating Temperature Range: -55°C minimum to 150°C maximum (required)

Parameter Comparison

Part Number	Manufacturer	VWM (90V)	VBR (Min)	VC (Max)	Ipp (A)	Power (W)	Temp Range (°C)	Package	Status
CD214C-T90ALF	Bourns Inc.	90V	100V	146V	10.3	1500	-55 ~ 150	DO-214AB, SMC	Obsolete
SMCJ90A	Fairchild Semiconductor	90V	100V	146V	10.3	1500	-55 ~ 150	DO-214AB, SMC	Active
SMCJ90A-13-F	Diodes Incorporated	90V	100V	146V	10.3	1500	-55 ~ 150	DO-214AB, SMC	Active
SMCJ90A-HR	Littelfuse	90V	100V	146V	10.3	1500	-65 ~ 150	DO-214AB, SMC	Active
SMCJ90A-HRA	Littelfuse Inc.	90V	100V	146V	10.3	1500	-65 ~ 150	DO-214AB, SMC	Active
SMCJ90A-HRAT7	Littelfuse Inc.	90V	100V	146V	10.3	1500	-65 ~ 150	DO-214AB, SMC	Active
5.0SMDJ90A	Taiwan Semiconductor Corporation	90V	100V	146V	34.3	5000	-55 ~ 175	DO-214AB, SMC	Active
5.0SMDJ90A-T7	Littelfuse Inc.	90V	100V	146V	34.3	5000	-65 ~ 150	DO-214AB, SMC	Active

Engineering Selection Recommendations

Primary Selection: SMCJ90A (Fairchild Semiconductor) is the recommended direct equivalent. This part maintains identical electrical specifications to the CD214C-T90ALF with 10.3A peak pulse current and 1500W power dissipation. Active product status ensures long-term availability and supply chain continuity. ROHS3 compliance and EAR99 export classification match the original part requirements.

Secondary Selections: SMCJ90A-13-F (Diodes Incorporated), SMCJ90A-HR (Littelfuse), SMCJ90A-HRA (Littelfuse Inc.), and SMCJ90A-HRAT7 (Littelfuse Inc.) provide identical electrical performance with active status. Littelfuse variants extend the lower operating temperature limit to -65°C, offering enhanced cold-temperature performance. All variants maintain DO-214AB/SMC package compatibility and ROHS3 compliance.

Enhanced Performance Alternatives: 5.0SMDJ90A (Taiwan Semiconductor Corporation) and 5.0SMDJ90A-T7 (Littelfuse Inc.) deliver higher peak pulse current (34.3A) and power dissipation (5000W) while maintaining the same voltage ratings and package. These parts are suitable for applications requiring superior transient suppression capability. The 5.0SMDJ90A-T7 variant supports extended lower temperature operation to -65°C.

Frequently Asked Questions (FAQ)

Q: Can SMCJ90A directly replace CD214C-T90ALF without circuit modification?

A: Yes. SMCJ90A maintains identical voltage ratings (90V reverse standoff, 146V clamping), peak pulse current (10.3A), power dissipation (1500W), and DO-214AB/SMC package configuration. Pin-to-pin compatibility is assured.

Q: What is the difference between direct equivalents and similar alternatives?

A: Direct equivalents (SMCJ90A series) match all electrical specifications of the original part. Similar alternatives (5.0SMDJ90A series) provide higher peak pulse current (34.3A) and power dissipation (5000W) for enhanced transient protection, though voltage ratings remain identical.

Q: Are Littelfuse SMCJ90A-HR variants suitable for low-temperature applications?

A: Yes. Littelfuse variants (SMCJ90A-HR, SMCJ90A-HRA, SMCJ90A-HRAT7) extend the lower operating temperature limit to -65°C compared to the original -55°C specification, providing improved performance in cold environments.

Q: Do all substitute parts meet ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant and maintain EAR99 export classification, matching the regulatory requirements of the original CD214C-T90ALF.

Q: What packaging options are available for substitute parts?

A: All substitute parts are supplied in DO-214AB/SMC surface mount package. Packaging formats include Bulk (SMCJ90A from Fairchild) and Tape & Reel (TR) options from other manufacturers. Verify packaging availability with your supplier for production requirements.

Q: Can 5.0SMDJ90A series parts be used in existing designs without layout changes?

A: Yes. The 5.0SMDJ90A series maintains DO-214AB/SMC package compatibility and identical pinout. However, the enhanced current and power ratings may allow for reduced thermal management requirements in the circuit design.

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