CD214C-T28CALF Equivalent & Substitute Parts

Part Overview

The CD214C-T28CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This bidirectional Zener diode features a 28V reverse standoff voltage with a 45.4V maximum clamping voltage and 33A peak pulse current capability in a DO-214AB (SMC) package. The component is classified as obsolete, necessitating identification of active equivalent and substitute parts that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214C-T28CALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener
Voltage - Reverse Standoff (Typ)	28V
Voltage - Breakdown (Min)	31.1V
Voltage - Clamping (Max) @ Ipp	45.4V
Current - Peak Pulse (10/1000µs)	33A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C (TJ)
Product Status	Obsolete
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD214C-T28CALF is determined by strict equivalence in the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Voltage - Reverse Standoff: 28V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 45.4V
Package / Case: DO-214AB (SMC)
Mounting Type: Surface Mount
Bidirectional Channels: 1
Type: Zener

Substitution Categories:

Direct Equivalents maintain identical electrical specifications (33A peak pulse current, 1500W peak pulse power) and are pin-for-pin compatible with no circuit modifications required.

Similar Substitutes maintain the critical voltage parameters and package but differ in peak pulse current (66.1A to 110A) and peak pulse power (3000W to 5000W). These parts provide enhanced transient protection capability and are mechanically and electrically compatible for direct replacement, though they offer superior performance margins.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package / Case	Operating Temperature	Product Status
CD214C-T28CALF	Bourns Inc.	28V	45.4V	33A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMCJ28CA	Fairchild Semiconductor	28V	45.4V	33.1A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMCJ28CA-HR	Littelfuse Inc.	28V	45.4V	33.1A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ28CA-HRA	Littelfuse	28V	45.4V	33.1A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ28CA-HRAT7	Littelfuse Inc.	28V	45.4V	33.1A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ28CA-M3/57T	Vishay General Semiconductor - Diodes Division	28V	45.4V	33A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
5.0SMDJ28CA	MDE Semiconductor Inc	28V	45.4V	110A	5000W	DO-214AB, SMC	-55°C ~ 150°C	Active
5.0SMDJ28CA-T7	Littelfuse Inc.	28V	45.4V	110A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMC3K28CA-M3/57	Vishay General Semiconductor - Diodes Division	28V	45.4V	66.1A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance):

SMCJ28CA (Fairchild Semiconductor) and SMCJ28CA-M3/57T (Vishay) are the primary direct equivalents, maintaining 33A peak pulse current and 1500W peak pulse power specifications. Both are active products with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). SMCJ28CA offers the highest inventory availability (34,100 units) for production continuity.

For Enhanced Protection Margin:

SMCJ28CA-HR, SMCJ28CA-HRA, and SMCJ28CA-HRAT7 (Littelfuse) provide identical electrical performance with extended operating temperature range (-65°C lower limit versus -55°C), suitable for applications requiring enhanced thermal performance. These variants maintain 1500W peak pulse power and are ROHS3 compliant.

5.0SMDJ28CA (MDE Semiconductor) and 5.0SMDJ28CA-T7 (Littelfuse) offer significantly higher transient protection capability with 110A peak pulse current and 5000W peak pulse power. These are suitable for applications experiencing higher transient stress while maintaining the same voltage protection thresholds.

SMC3K28CA-M3/57 (Vishay TransZorb) provides intermediate performance with 66.1A peak pulse current and 3000W peak pulse power, offering a balance between the standard 1500W and enhanced 5000W options.

All recommended substitutes maintain DO-214AB (SMC) package compatibility, surface mount configuration, and the critical 28V reverse standoff and 45.4V clamping voltage specifications.

Frequently Asked Questions (FAQ)

Q: Can SMCJ28CA directly replace CD214C-T28CALF without circuit modifications?

A: Yes. SMCJ28CA maintains identical voltage specifications (28V reverse standoff, 45.4V clamping), current rating (33.1A peak pulse), power rating (1500W), and DO-214AB package. No circuit modifications are required.

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

A: Direct equivalents (SMCJ28CA series) maintain identical peak pulse current (33A) and power (1500W) ratings. Similar substitutes (5.0SMDJ28CA, SMC3K28CA) maintain voltage specifications but provide higher current and power ratings, offering enhanced transient protection capability. All are mechanically and electrically compatible.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All recommended substitute parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the compliance status of the original CD214C-T28CALF.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution. The original part operates -55°C to 150°C. Littelfuse variants (SMCJ28CA-HR, SMCJ28CA-HRA, 5.0SMDJ28CA-T7) extend the lower limit to -65°C, providing additional thermal margin without affecting electrical compatibility.

Q: Can I use a higher-rated part like 5.0SMDJ28CA-T7 in place of CD214C-T28CALF?

A: Yes. The 5.0SMDJ28CA-T7 maintains the same voltage protection thresholds (28V standoff, 45.4V clamping) and package (DO-214AB) while providing superior transient current handling (110A versus 33A) and power dissipation (5000W versus 1500W). This represents an upgrade in protection capability with full electrical and mechanical compatibility.

Q: What packaging options are available for these substitutes?

A: All substitute parts are supplied in DO-214AB (SMC) surface mount package, matching the original CD214C-T28CALF. Tape & Reel (TR) packaging is available for production quantities on most variants.

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