CD214C-T30ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T30ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 30V reverse standoff voltage with 48.4V clamping capability at 31A peak pulse current. Housed in the DO-214AB (SMC) surface mount package, this component is designed for general-purpose transient voltage suppression applications across industrial and commercial electronics.

The CD214C-T30ALF is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or repair requirements for systems utilizing this component.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	31A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature Range	-55°C ~ 150°C (TJ)
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution of the CD214C-T30ALF is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 30V (exact match required)
Voltage - Clamping (Max) @ Ipp: 48.4V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)
Type: Zener, Unidirectional (exact match required)

Secondary Consideration:

Current - Peak Pulse (10/1000µs): Substitute parts may exceed 31A; higher ratings provide enhanced transient suppression capability without compromising circuit protection
Power - Peak Pulse: Substitute parts may exceed 1500W; higher ratings provide additional margin
Operating Temperature Range: Substitute parts may extend the upper or lower temperature limits; this does not restrict substitution

Direct Equivalents (SMCJ30A series by MDD) maintain identical electrical specifications and are pin-compatible replacements.

Similar Parts (higher current/power ratings from Diodes Incorporated, Taiwan Semiconductor Corporation, Littelfuse Inc., and Vishay) meet all primary criteria while offering enhanced performance characteristics. These are suitable for applications requiring greater transient energy absorption.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse	Power - Peak Pulse	Package	Operating Temp Range	Product Status
CD214C-T30ALF	Bourns Inc.	30V	48.4V	31A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMCJ30A	MDD	30V	48.4V	31A	1500W	DO-214AB, SMC	-50°C ~ 150°C	Active
3.0SMCJ30A-13	Diodes Incorporated	30V	48.4V	62A	3000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ30A	Taiwan Semiconductor Corporation	30V	48.4V	103A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ30A-T7	Littelfuse Inc.	30V	48.4V	103A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A-HR	Littelfuse Inc.	30V	48.4V	31A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A-HRA	Littelfuse Inc.	30V	48.4V	31A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A-HRAT7	Littelfuse Inc.	30V	48.4V	31A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A-M3/57T	Vishay General Semiconductor - Diodes Division	30V	48.4V	31A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Replacement (Preferred for Pin-Compatible Substitution): SMCJ30A by MDD is the primary direct equivalent. All electrical parameters match the CD214C-T30ALF exactly. Product status is active with substantial inventory availability (22,928 pcs). Both parts are ROHS3 compliant and carry identical HTSUS and ECCN classifications. The operating temperature range is -50°C to 150°C, which covers the lower bound of the original part's -55°C specification by 5°C. This part is suitable for applications where the original CD214C-T30ALF specifications are required without modification.

Enhanced Performance Alternatives (Higher Current/Power Ratings): For applications requiring greater transient energy absorption or margin, the following active parts meet all primary substitution criteria while providing enhanced ratings:

3.0SMCJ30A-13 (Diodes Incorporated): 62A peak pulse, 3000W power rating, extended temperature range to 175°C
5.0SMDJ30A (Taiwan Semiconductor Corporation): 103A peak pulse, 5000W power rating, extended temperature range to 175°C
5.0SMDJ30A-T7 (Littelfuse Inc.): 103A peak pulse, 5000W power rating, extended lower temperature limit to -65°C

Equivalent Performance Alternatives (Matched Ratings, Extended Temperature Range): The Littelfuse SMCJ30A-HR, SMCJ30A-HRA, and SMCJ30A-HRAT7 series maintain identical electrical specifications to the CD214C-T30ALF while extending the lower operating temperature limit to -65°C. These are suitable for applications requiring enhanced cold-temperature performance.

The Vishay SMCJ30A-M3/57T (TransZorb® series) provides equivalent specifications with active product status and established supply availability.

All substitute parts listed are ROHS3 compliant and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0080).

Frequently Asked Questions (FAQ)

Q: Can I use SMCJ30A by MDD as a direct replacement for CD214C-T30ALF? A: Yes. SMCJ30A matches all critical electrical parameters: 30V reverse standoff, 48.4V clamping voltage, 31A peak pulse current, and 1500W power rating. Both use the DO-214AB (SMC) package. The part is active and widely available.

Q: What is the difference between SMCJ30A and the higher-rated alternatives like 5.0SMDJ30A? A: SMCJ30A maintains the original 31A/1500W specification. The 5.0SMDJ30A series provides 103A peak pulse and 5000W power rating, offering greater transient suppression capability. Both maintain the same 30V/48.4V voltage specifications and DO-214AB package. Selection depends on whether your application requires the enhanced energy absorption of the higher-rated part.

Q: Are all substitute parts in the same package? A: Yes. All listed substitute parts use the DO-214AB (SMC) surface mount package, ensuring mechanical and electrical compatibility with the original CD214C-T30ALF footprint.

Q: Does the operating temperature range affect substitution? A: The CD214C-T30ALF operates from -55°C to 150°C. SMCJ30A operates from -50°C to 150°C, which is acceptable for most applications. If your design requires operation below -50°C, select alternatives with extended lower temperature limits, such as SMCJ30A-HR (-65°C to 150°C) or 5.0SMDJ30A-T7 (-65°C to 150°C).

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts are ROHS3 compliant, matching the compliance status of the original CD214C-T30ALF.

Q: Why is CD214C-T30ALF marked as obsolete? A: Obsolescence indicates the part is no longer manufactured by Bourns Inc. Active alternatives from established manufacturers (MDD, Diodes Incorporated, Taiwan Semiconductor Corporation, Littelfuse Inc., Vishay) provide equivalent or enhanced functionality with ongoing supply availability.

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