CD214L-T33CALF Equivalent & Substitute Parts

Part Overview

The CD214L-T33CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This part operates with a 33V reverse standoff voltage and 53.3V maximum clamping voltage, delivering 56.2A peak pulse current with 3000W peak pulse power dissipation. The component is classified as obsolete, necessitating identification of active equivalent alternatives that maintain electrical and mechanical compatibility for continued circuit protection functionality.

Key Parameters

Parameter	CD214L-T33CALF
Voltage - Reverse Standoff (Typ)	33V
Voltage - Breakdown (Min)	36.7V
Voltage - Clamping (Max) @ Ipp	53.3V
Current - Peak Pulse (10/1000µs)	56.2A
Power - Peak Pulse	3000W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Type	Zener
Bidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD214L-T33CALF is determined by strict equivalence across the following electrical and mechanical parameters:

Voltage - Reverse Standoff: 33V (exact match required)
Voltage - Breakdown (Min): 36.7V (exact match required)
Voltage - Clamping (Max) @ Ipp: 53.3V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)
Bidirectional Channels: 1 (exact match required)

Substitute parts are categorized into two groups:

Direct Equivalents maintain all electrical parameters including peak pulse current (56.2A) and power dissipation (3000W).

Similar Alternatives maintain voltage parameters and package specifications but differ in peak pulse current and power dissipation ratings, suitable for applications with lower transient energy requirements or enhanced protection margins.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temperature	Product Status
CD214L-T33CALF	Bourns Inc.	33V	36.7V	53.3V	56.2A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMLJ33CA	Bourns Inc.	33V	36.7V	53.3V	56.2A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMDJ33CA	Alpha & Omega Semiconductor Inc.	33V	36.7V	53.3V	56.3A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMLJ33CA-TP	Micro Commercial Co	33V	36.7V	53.3V	56.2A	3000W	DO-214AB, SMC	-55°C ~ 175°C	Active
SMCJ33CA-TP	Micro Commercial Co	33V	36.7V	53.3V	28.2A	1500W	DO-214AB, SMC	-55°C ~ 175°C	Active
SMCJ33CA	MDD	33V	36.7V	53.3V	28.2A	1500W	DO-214AB, SMC	-50°C ~ 150°C	Active
5.0SMDJ33CA	HY Electronic (Cayman) Limited	33V	36.7V	53.3V	93.9A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
5.0SMDJ33CA-T7	Littelfuse Inc.	33V	36.7V	53.3V	93.9A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Primary Recommendation: SMLJ33CA (Bourns Inc.)

The SMLJ33CA is the direct functional equivalent of the CD214L-T33CALF, manufactured by the same supplier. It maintains identical electrical specifications (33V standoff, 53.3V clamping, 56.2A peak pulse, 3000W power) and package configuration (DO-214AB, SMC). The part is active in production with ROHS3 compliance and unlimited moisture sensitivity rating, ensuring long-term availability and regulatory compliance.

Secondary Recommendation: SMDJ33CA (Alpha & Omega Semiconductor Inc.)

The SMDJ33CA provides electrical equivalence with marginally higher peak pulse current (56.3A versus 56.2A) and identical power dissipation (3000W). This part is active with ROHS3 compliance and suitable for applications requiring sustained component availability from an alternative manufacturer.

Enhanced Protection Alternative: 5.0SMDJ33CA or 5.0SMDJ33CA-T7

These parts maintain all voltage parameters (33V standoff, 53.3V clamping) and package specifications while providing increased transient energy handling (93.9A peak pulse, 5000W power). The 5.0SMDJ33CA-T7 (Littelfuse Inc.) offers extended operating temperature range (-65°C to 150°C) and ROHS3 compliance. These alternatives are suitable for applications with higher transient stress or requiring enhanced protection margins.

Lower Power Alternative: SMCJ33CA-TP or SMCJ33CA

These parts maintain voltage and package equivalence but operate at reduced peak pulse current (28.2A) and power dissipation (1500W). Selection is appropriate only for applications with confirmed lower transient energy requirements. The SMCJ33CA-TP variant offers extended upper operating temperature (175°C) and tape & reel packaging.

Frequently Asked Questions (FAQ)

Q: Can SMLJ33CA directly replace CD214L-T33CALF without circuit modification?

A: Yes. The SMLJ33CA maintains identical electrical specifications (33V standoff, 36.7V breakdown minimum, 53.3V clamping maximum, 56.2A peak pulse, 3000W power) and DO-214AB SMC package configuration. No circuit modifications are required.

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

A: Direct equivalents (SMLJ33CA, SMDJ33CA, SMLJ33CA-TP) maintain the original peak pulse current (56.2A) and power dissipation (3000W). Similar alternatives differ in these parameters: enhanced versions (5.0SMDJ33CA series) provide higher ratings (93.9A, 5000W), while reduced versions (SMCJ33CA series) provide lower ratings (28.2A, 1500W). All maintain the required voltage specifications and package form factor.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, meeting regulatory requirements for hazardous substance restrictions.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution. The CD214L-T33CALF operates -55°C to 150°C. Substitute parts with extended ranges (such as SMLJ33CA-TP at -55°C to 175°C) provide additional thermal margin. Parts with narrower ranges (such as SMCJ33CA at -50°C to 150°C) remain compatible if the application operates within the specified limits.

Q: What packaging options are available for these substitutes?

A: All substitute parts use DO-214AB SMC surface mount package. Packaging format (bulk or tape & reel) varies by manufacturer and part number suffix. Tape & reel variants are identified by "-TP" or "-T7" suffixes and are suitable for automated assembly processes.

Q: Can I use the 5.0SMDJ33CA series as a direct replacement?

A: Yes, electrically and mechanically. The 5.0SMDJ33CA series maintains all voltage parameters and package specifications. The increased peak pulse current (93.9A) and power dissipation (5000W) provide enhanced transient protection without circuit modification, making these parts suitable for applications requiring higher protection margins or experiencing higher transient stress.

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