CD214C-T75ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T75ALF is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., rated for 75V reverse standoff voltage with 121V maximum clamping voltage and 12.4A peak pulse current. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

The CD214C-T75ALF operates across a temperature range of -55°C to 150°C and is packaged in the DO-214AB (SMC) surface mount configuration. It is ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level) and carries EAR99 export classification.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	75V
Voltage - Breakdown (Min)	83.3V
Voltage - Clamping (Max) @ Ipp	121V
Current - Peak Pulse (10/1000µs)	12.4A
Power - Peak Pulse	1500W
Operating Temperature	-55°C ~ 150°C
Package / Case	DO-214AB, SMC
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant
MSL	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214C-T75ALF is determined by strict electrical and mechanical parameter matching:

Direct Electrical Equivalents maintain identical specifications across all critical parameters: 75V reverse standoff voltage, 83.3V minimum breakdown voltage, 121V maximum clamping voltage, 12.4A peak pulse current, and 1500W peak pulse power. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Parts with Higher Power Ratings share the same voltage specifications (75V standoff, 121V clamping) and package format but feature increased peak pulse current (24.8A to 41.4A) and proportionally higher power dissipation (3000W to 5000W). These parts are mechanically compatible but deliver enhanced transient suppression capability.

Key Parameters for Substitution Compatibility:

Voltage - Reverse Standoff: 75V (required)
Voltage - Clamping (Max) @ Ipp: 121V (required)
Package / Case: DO-214AB, SMC (required)
Unidirectional Channels: 1 (required)
Operating Temperature Range: -55°C minimum, 150°C maximum (required)

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage	Breakdown Voltage (Min)	Clamping Voltage (Max)	Peak Pulse Current	Peak Pulse Power	Operating Temperature	Product Status
CD214C-T75ALF	Bourns Inc.	75V	83.3V	121V	12.4A	1500W	-55°C ~ 150°C	Obsolete
SMCJ75A	Meritek	75V	83.3V	121V	12.4A	1500W	-55°C ~ 150°C	Active
SMCJ75A-HR	Littelfuse	75V	83.3V	121V	12.4A	1500W	-65°C ~ 150°C	Active
SMCJ75A-HRA	Littelfuse Inc.	75V	83.3V	121V	12.4A	1500W	-65°C ~ 150°C	Active
SMCJ75A-HRAT7	Littelfuse Inc.	75V	83.3V	121V	12.4A	1500W	-65°C ~ 150°C	Active
SMDJ75A	Alpha & Omega Semiconductor Inc.	75V	83.3V	121V	24.8A	3000W	-55°C ~ 150°C	Active
SMDJ75A-T7	Littelfuse Inc.	75V	83.3V	121V	24.8A	3000W	-65°C ~ 150°C	Active
5.0SMDJ75A	Taiwan Semiconductor Corporation	75V	83.3V	121V	41.4A	5000W	-55°C ~ 175°C	Active
5.0SMDJ75A-T7	Littelfuse Inc.	75V	83.3V	121V	41.4A	5000W	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for Pin-Compatible Substitution): SMCJ75A (Meritek) is the primary direct equivalent, maintaining identical electrical specifications and operating temperature range. This part is currently in active production status with 18,835 units in stock, ensuring long-term availability. Both SMCJ75A-HR and SMCJ75A-HRA from Littelfuse provide equivalent electrical performance with extended lower temperature rating (-65°C vs. -55°C), offering improved thermal margin for demanding applications.

Higher Power Capability Alternatives: SMDJ75A series parts (24.8A, 3000W) and 5.0SMDJ75A series parts (41.4A, 5000W) are mechanically and electrically compatible substitutes that provide enhanced transient suppression capacity. These parts maintain the same voltage specifications and DO-214AB package format while delivering 2x to 3.3x greater peak pulse power dissipation. Selection of higher-power variants is appropriate when circuit analysis indicates increased transient energy exposure or when design margin improvement is required.

Compliance Considerations: All substitute parts listed are ROHS3 compliant and carry EAR99 export classification, matching the regulatory status of the original CD214C-T75ALF. Littelfuse variants maintain MSL 1 (unlimited) moisture sensitivity level, consistent with the original specification.

Frequently Asked Questions (FAQ)

Q: Can SMCJ75A directly replace CD214C-T75ALF without circuit modification? A: Yes. SMCJ75A maintains identical voltage ratings (75V standoff, 121V clamping), peak pulse current (12.4A), power dissipation (1500W), and DO-214AB package format. No circuit changes are required for direct substitution.

Q: What is the difference between 12.4A and 24.8A peak pulse current variants? A: Peak pulse current rating indicates the maximum transient current the diode can suppress. Higher current ratings (SMDJ75A at 24.8A, 5.0SMDJ75A at 41.4A) provide greater transient suppression capacity and proportionally higher power dissipation. Selection depends on circuit transient energy requirements. Lower-rated parts are suitable for general-purpose applications; higher-rated parts are appropriate for high-energy transient environments.

Q: Are Littelfuse SMCJ75A-HR and SMCJ75A-HRA interchangeable? A: Yes. Both parts share identical electrical specifications (75V standoff, 121V clamping, 12.4A peak pulse current, 1500W power) and extended operating temperature range (-65°C to 150°C). The -HRA variant represents a product line variant with equivalent performance characteristics.

Q: Does operating temperature range affect substitution compatibility? A: Operating temperature range must meet or exceed the original specification. CD214C-T75ALF operates -55°C to 150°C. Littelfuse variants rated -65°C to 150°C exceed this requirement and are fully compatible. Parts with lower maximum temperature ratings (below 150°C) are not suitable substitutes.

Q: What packaging format is required for these substitutes? A: All listed substitutes use DO-214AB (SMC) surface mount package, matching the original CD214C-T75ALF. This package format is mandatory for mechanical and electrical compatibility on existing PCB layouts.

Q: Can I use a higher power-rated part (5.0SMDJ75A) in place of the original 1500W part? A: Yes. Higher power-rated parts are backward-compatible substitutes. The 5.0SMDJ75A (5000W, 41.4A) will function correctly in circuits designed for the 1500W CD214C-T75ALF, providing enhanced transient suppression margin. No circuit modification is required.

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