CD214L-T30ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T30ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 30V reverse standoff voltage with a 48.4V clamping voltage at peak pulse current of 62A. This component is designed for general-purpose overvoltage protection in surface mount applications using the DO-214AB (SMC) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD214L-T30ALF
Manufacturer	Bourns Inc.
Category	Transient Voltage Suppressors (TVS)
Type	Zener, Unidirectional
Voltage - Reverse Standoff (Typ)	30V
Voltage - Breakdown (Min)	33.3V
Voltage - Clamping (Max) @ Ipp	48.4V
Current - Peak Pulse (10/1000µs)	62A
Power - Peak Pulse	3000W (3kW)
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the CD214L-T30ALF is determined by the following critical electrical and mechanical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 30V (exact match required)
Voltage - Breakdown (Min): 33.3V (exact match required)
Voltage - Clamping (Max) @ Ipp: 48.4V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Type: Zener, Unidirectional (exact match required)

Secondary Compatibility Parameters:

Current - Peak Pulse (10/1000µs): 62A or higher acceptable
Power - Peak Pulse: 3000W or higher acceptable
Operating Temperature Range: -55°C minimum and 150°C maximum acceptable
RoHS3 Compliance: Required for regulatory alignment

Substitute parts are grouped into two categories:

Direct Equivalents (Identical Electrical & Mechanical Specifications): Parts matching all primary criteria with identical or superior current and power ratings at the same clamping voltage.

Compatible Alternatives (Higher Performance Ratings): Parts with identical voltage specifications and package but with higher peak pulse current or power dissipation ratings, suitable for applications requiring enhanced transient protection margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Breakdown (Min)	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temperature	Product Status
CD214L-T30ALF	Bourns Inc.	30V	33.3V	48.4V	62A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMLJ30A	Bourns Inc.	30V	33.3V	48.4V	62A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active
3.0SMCJ30A-13	Diodes Incorporated	30V	33.3V	48.4V	62A	3000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ30A	Taiwan Semiconductor Corporation	30V	33.3V	48.4V	103A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ30A-T7	Littelfuse Inc.	30V	33.3V	48.4V	103A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A	MDD	30V	33.3V	48.4V	31A	1500W	DO-214AB, SMC	-50°C ~ 150°C	Active
SMCJ30A-HRAT7	Littelfuse Inc.	30V	33.3V	48.4V	31A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ30A-TP	Micro Commercial Co	30V	33.3V	48.4V	31A	1500W	DO-214AB, SMC	-55°C ~ 175°C	Active
SMCJ30A-TR	STMicroelectronics	30V	33.3V	64.3V	156A (8/20µs)	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMDJ30A	Alpha & Omega Semiconductor Inc.	30V	33.3V	48.4V	62A	3000W	DO-214AB, SMC	-55°C ~ 150°C	Active

Engineering Selection Recommendations

Tier 1 - Direct Replacement (Identical Specifications):

SMLJ30A (Bourns Inc.) is the primary direct equivalent. It maintains identical electrical specifications (30V standoff, 33.3V breakdown, 48.4V clamping, 62A peak pulse, 3000W power) and package configuration. As an active product from the original manufacturer, it provides continuity in design and supply chain reliability. ROHS3 compliance is maintained.

SMDJ30A (Alpha & Omega Semiconductor Inc.) provides identical electrical and thermal specifications with active product status and ROHS3 compliance. This option is suitable for applications where multi-source qualification is required.

Tier 2 - Enhanced Performance Substitutes (Higher Current/Power Ratings):

5.0SMDJ30A (Taiwan Semiconductor Corporation) and 5.0SMDJ30A-T7 (Littelfuse Inc.) maintain the critical voltage specifications (30V standoff, 33.3V breakdown, 48.4V clamping) while providing significantly higher peak pulse current (103A) and power dissipation (5000W). These parts are suitable for applications requiring additional transient protection margin. Both are active products with ROHS3 compliance.

Tier 3 - Lower Performance Alternatives (Reduced Current/Power Ratings):

SMCJ30A variants (MDD, Littelfuse SMCJ30A-HRAT7, Micro Commercial SMCJ30A-TP) maintain voltage specifications but provide reduced peak pulse current (31A) and power dissipation (1500W). These are suitable only for applications with lower transient energy requirements and should be selected only when the original 62A/3000W specification can be reduced without compromising circuit protection.

Voltage Specification Exception:

SMCJ30A-TR (STMicroelectronics) exhibits a higher clamping voltage (64.3V) compared to the 48.4V specification of the CD214L-T30ALF. This part does not meet the primary substitution criteria and should not be used as a direct replacement.

Temperature Range Considerations:

3.0SMCJ30A-13 (Diodes Incorporated) and SMCJ30A-TP (Micro Commercial Co) offer extended upper operating temperature limits (-55°C ~ 175°C), providing additional thermal margin for high-temperature applications. 5.0SMDJ30A-T7 (Littelfuse Inc.) and SMCJ30A-HRAT7 (Littelfuse Inc.) extend the lower temperature limit to -65°C for cold-environment applications.

Frequently Asked Questions (FAQ)

Q: Can SMCJ30A-TR be used as a substitute for CD214L-T30ALF?

A: No. SMCJ30A-TR has a clamping voltage of 64.3V, which exceeds the 48.4V specification of the CD214L-T30ALF. This higher clamping voltage will not provide equivalent overvoltage protection and does not meet the primary substitution criteria.

Q: What is the difference between SMLJ30A and SMDJ30A?

A: Both parts meet the electrical specifications of the CD214L-T30ALF (30V standoff, 33.3V breakdown, 48.4V clamping, 62A peak pulse, 3000W power) and use the DO-214AB SMC package. The primary difference is manufacturer: SMLJ30A is from Bourns Inc. (original manufacturer) and SMDJ30A is from Alpha & Omega Semiconductor Inc. Selection depends on supply chain availability and qualification requirements.

Q: Can I use 5.0SMDJ30A instead of CD214L-T30ALF?

A: Yes, 5.0SMDJ30A is a compatible substitute. It maintains identical voltage specifications (30V standoff, 33.3V breakdown, 48.4V clamping) and package type (DO-214AB SMC) while providing higher peak pulse current (103A vs. 62A) and power dissipation (5000W vs. 3000W). The enhanced ratings provide additional transient protection margin without compromising circuit compatibility.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance, ensuring regulatory alignment with the original CD214L-T30ALF specification.

Q: What is the impact of selecting SMCJ30A variants with lower current ratings (31A)?

A: SMCJ30A variants provide reduced peak pulse current (31A) and power dissipation (1500W) compared to the original 62A/3000W specification. These parts are suitable only for applications where the transient energy requirement is confirmed to be within the lower rating. Use of these parts in circuits designed for 62A protection will result in inadequate overvoltage suppression.

Q: Does operating temperature range affect substitution compatibility?

A: Operating temperature range does not prevent substitution but should be verified against application requirements. The CD214L-T30ALF operates from -55°C to 150°C. Substitute parts with extended ranges (such as -55°C ~ 175°C or -65°C ~ 150°C) provide additional thermal margin but do not change electrical substitution criteria. Parts with narrower ranges (such as -50°C ~ 150°C) may not be suitable for applications requiring full -55°C minimum operation.

Q: What packaging options are available for substitutes?

A: All substitute parts use the DO-214AB (SMC) surface mount package, maintaining mechanical compatibility with the original CD214L-T30ALF. Packaging variants (Tape & Reel, Cut Tape, bulk) do not affect electrical substitution but should be selected based on procurement and assembly requirements.

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