CD214C-T33CALF Equivalent & Substitute Parts

Part Overview

The CD214C-T33CALF is a 33V Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., rated for 53.3V clamping voltage and 28.1A peak pulse current in a surface mount SMC (DO-214AB) package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

TVS diodes in this voltage class are used for transient overvoltage protection in general-purpose applications. The 33V reverse standoff voltage with 53.3V maximum clamping voltage defines the protection window for this device category.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	33V
Voltage - Breakdown (Min)	36.7V
Voltage - Clamping (Max) @ Ipp	53.3V
Current - Peak Pulse (10/1000µs)	28.1A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature Range	-55°C ~ 150°C
Type	Zener
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution for the CD214C-T33CALF is determined by the following critical parameters:

Voltage - Reverse Standoff: 33V (exact match required)
Voltage - Clamping (Max) @ Ipp: 53.3V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Current - Peak Pulse: 28.1A minimum (equal or higher acceptable)
Power - Peak Pulse: 1500W minimum (equal or higher acceptable)
Operating Temperature: -55°C minimum lower bound (equal or wider range acceptable)

Substitute parts are grouped into two categories:

Direct Equivalents: Parts with identical voltage ratings, clamping specifications, and current ratings within 1% tolerance. These provide pin-for-pin and functional replacement without circuit redesign.

Similar Alternatives: Parts with identical voltage and clamping specifications but higher current ratings and power dissipation. These provide enhanced protection capability and are suitable where circuit design permits higher transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temperature	Product Status
CD214C-T33CALF	Bourns Inc.	33V	53.3V	28.1A	1500W	-55°C ~ 150°C	Obsolete
SMCJ33CA	MDD	33V	53.3V	28.2A	1500W	-50°C ~ 150°C	Active
SMCJ33CA-13-F	Diodes Incorporated	33V	53.3V	28.1A	1500W	-55°C ~ 150°C	Active
SMCJ33CA-HR	Littelfuse Inc.	33V	53.3V	28.2A	1500W	-65°C ~ 150°C	Active
SMCJ33CA-HRA	Littelfuse Inc.	33V	53.3V	28.2A	1500W	-65°C ~ 150°C	Active
SMCJ33CA-HRAT7	Littelfuse Inc.	33V	53.3V	28.2A	1500W	-65°C ~ 150°C	Active
SMC3K33CA-M3/57	Vishay General Semiconductor - Diodes Division	33V	53.3V	56.3A	3000W	-55°C ~ 150°C	Active
5.0SMDJ33CA	HY Electronic (Cayman) Limited	33V	53.3V	93.9A	5000W	-65°C ~ 150°C	Active
5.0SMDJ33CA-T7	Littelfuse Inc.	33V	53.3V	93.9A	5000W	-65°C ~ 150°C	Active

Engineering Selection Recommendations

For Direct Replacement (No Circuit Modification Required):

SMCJ33CA-13-F (Diodes Incorporated) provides the closest functional match to the CD214C-T33CALF. Both devices share identical voltage ratings, current specifications, and operating temperature range (-55°C ~ 150°C). This part is active in production and ROHS3 compliant.

SMCJ33CA (MDD) is an active alternative with equivalent voltage and power ratings. The operating temperature lower bound is -50°C, which is acceptable for most general-purpose applications where the original -55°C specification is not critical.

For Enhanced Protection Capability:

SMC3K33CA-M3/57 (Vishay) maintains identical voltage specifications while providing 2× the peak pulse current (56.3A) and 2× the power dissipation (3000W). This part is suitable for applications requiring higher transient energy absorption within the same voltage protection window.

5.0SMDJ33CA-T7 (Littelfuse Inc.) and 5.0SMDJ33CA (HY Electronic) provide 3.3× the peak pulse current and 3.3× the power dissipation. These parts are appropriate for high-energy transient environments while maintaining the 33V/53.3V voltage specification.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant and carry EAR99 ECCN classification, matching the regulatory status of the original component. Littelfuse SMCJ-HR and SMCJ-HRA series parts offer extended lower operating temperature (-65°C) for applications requiring enhanced cold-temperature performance.

Frequently Asked Questions (FAQ)

Q: Can SMCJ33CA replace CD214C-T33CALF directly?

A: Yes. Both parts share the same 33V reverse standoff voltage, 53.3V clamping voltage, and 1500W power rating in DO-214AB SMC packaging. The SMCJ33CA operates at -50°C minimum instead of -55°C; verify this meets your application requirements.

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

A: Direct equivalents (SMCJ33CA, SMCJ33CA-13-F, SMCJ33CA-HR series) maintain the same current and power ratings as the original part. Similar alternatives (SMC3K33CA-M3/57, 5.0SMDJ series) provide higher current and power handling while preserving the voltage protection window. Higher-rated parts do not require circuit changes but provide enhanced transient suppression capability.

Q: Does using a higher-rated TVS diode affect circuit performance?

A: No. A TVS diode with higher current and power ratings operates identically at the specified voltage levels. The higher ratings simply indicate the device can absorb greater transient energy without degradation. The clamping voltage remains 53.3V regardless of current rating.

Q: Are all substitute parts available in the same package?

A: Yes. All listed substitutes use DO-214AB (SMC) surface mount packaging, ensuring mechanical and electrical compatibility with the original CD214C-T33CALF footprint.

Q: What is the significance of the Littelfuse SMCJ-HR and SMCJ-HRA designations?

A: The HR and HRA suffixes indicate enhanced reliability grades with extended operating temperature ranges (-65°C lower bound versus -50°C or -55°C). These parts are suitable for applications requiring wider temperature performance margins.

Q: Can I use 5.0SMDJ33CA-T7 as a direct replacement?

A: Yes, mechanically and electrically. The 5.0SMDJ series provides 3.3× higher current and power ratings while maintaining identical voltage specifications. No circuit modification is required. This substitution is appropriate for applications where enhanced transient protection is beneficial.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message