CD214C-T24ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T24ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 24V reverse standoff with 38.9V maximum clamping voltage and 38.6A peak pulse current. The device is packaged in DO-214AB (SMC) surface mount configuration and is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	24V
Voltage - Breakdown (Min)	26.7V
Voltage - Clamping (Max) @ Ipp	38.9V
Current - Peak Pulse (10/1000µs)	38.6A
Power - Peak Pulse	1500W
Type	Zener
Unidirectional Channels	1
Package / Case	DO-214AB, SMC
Operating Temperature	-55°C ~ 150°C (TJ)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitute parts are classified into two categories based on electrical parameter compatibility with the CD214C-T24ALF:

Direct Equivalents maintain identical electrical specifications: 24V reverse standoff, 26.7V minimum breakdown voltage, 38.9V maximum clamping voltage, and 38.6A peak pulse current. These parts are pin-compatible and functionally interchangeable in the same circuit application without design modification.

Similar Substitutes share the same voltage ratings (24V standoff, 26.7V breakdown, 38.9V clamping) but differ in peak pulse current handling and power dissipation capability. These parts are suitable for applications where higher current capacity or power rating provides additional design margin, though they require verification of PCB thermal management and package footprint compatibility.

The critical parameters determining substitution eligibility are:

Voltage - Reverse Standoff: 24V
Voltage - Breakdown (Min): 26.7V
Voltage - Clamping (Max) @ Ipp: 38.9V
Package / Case: DO-214AB, SMC (or compatible surface mount package)
Unidirectional Channels: 1

Parameter Comparison

Part Number	Manufacturer	Standoff Voltage	Breakdown Voltage (Min)	Clamping Voltage (Max)	Peak Pulse Current	Power - Peak Pulse	Package	Status
CD214C-T24ALF	Bourns Inc.	24V	26.7V	38.9V	38.6A	1500W	DO-214AB, SMC	Obsolete
SMCJ24A	EVVO Semi	24V	26.7V	38.9V	38.6A	600W	DO-214AC, SMA	Active
3.0SMCJ24A-13	Diodes Incorporated	24V	26.7V	38.9V	77.1A	3000W	DO-214AB, SMC	Active
5.0SMDJ24A	Taiwan Semiconductor Corporation	24V	26.7V	38.9V	129A	5000W	DO-214AB, SMC	Active
5.0SMDJ24A-T7	Littelfuse Inc.	24V	26.7V	38.9V	129A	5000W	DO-214AB, SMC	Active
SMCJ24A-HR	Littelfuse Inc.	24V	26.7V	38.9V	38.6A	1500W	DO-214AB, SMC	Active
SMCJ24A-M3/57T	Vishay General Semiconductor - Diodes Division	24V	26.7V	38.9V	38.6A	1500W	DO-214AB, SMC	Active
SMDJ24A	Alpha & Omega Semiconductor Inc.	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	Active
SMLJ24A-TP	Micro Commercial Co	24V	26.7V	38.9V	77.2A	3000W	DO-214AB, SMC	Active

Engineering Selection Recommendations

For Direct Replacement (Identical Electrical Performance): SMCJ24A-HR (Littelfuse Inc.) and SMCJ24A-M3/57T (Vishay General Semiconductor) are the preferred direct substitutes, maintaining 38.6A peak pulse current and 1500W power rating identical to the CD214C-T24ALF. Both are active products with ROHS3 compliance and unlimited moisture sensitivity rating. SMCJ24A-HR operates across -65°C to 150°C, while SMCJ24A-M3/57T operates -55°C to 150°C, matching the original part's temperature range.

For Enhanced Performance (Higher Current/Power Capacity): When circuit design permits higher current handling, SMDJ24A (Alpha & Omega Semiconductor Inc.) and SMLJ24A-TP (Micro Commercial Co) provide 77.2A peak pulse current and 3000W power rating in the same DO-214AB SMC package. These are suitable for applications requiring additional transient energy absorption margin.

For Maximum Power Dissipation: 5.0SMDJ24A (Taiwan Semiconductor Corporation) and 5.0SMDJ24A-T7 (Littelfuse Inc.) deliver 129A peak pulse current and 5000W power rating, appropriate for high-energy transient protection applications. Both maintain DO-214AB SMC packaging and active product status.

Package Consideration: SMCJ24A (EVVO Semi) uses DO-214AC SMA package instead of DO-214AB SMC. This represents a different footprint and requires PCB layout verification before selection.

All recommended substitutes are ROHS3 compliant and carry EAR99 ECCN classification matching the original part.

Frequently Asked Questions (FAQ)

Q: Can SMCJ24A from EVVO Semi be used as a direct replacement for CD214C-T24ALF? A: SMCJ24A maintains identical electrical specifications (24V standoff, 26.7V breakdown, 38.9V clamping, 38.6A peak pulse current). However, it uses DO-214AC SMA package instead of DO-214AB SMC package. Direct PCB substitution is not possible without footprint modification.

Q: What is the difference between SMCJ24A-HR and SMCJ24A-M3/57T? A: Both parts are electrically identical with 38.6A peak pulse current and 1500W power rating in DO-214AB SMC package. SMCJ24A-HR operates -65°C to 150°C, while SMCJ24A-M3/57T operates -55°C to 150°C. Selection depends on application temperature requirements.

Q: Why would I choose SMDJ24A over SMCJ24A-HR if both fit the same package? A: SMDJ24A provides 77.2A peak pulse current and 3000W power rating compared to SMCJ24A-HR's 38.6A and 1500W. Higher ratings provide additional design margin for transient protection in high-energy environments, though both maintain identical voltage specifications.

Q: Are all substitute parts ROHS3 compliant? A: All listed substitute parts are ROHS3 compliant, matching the compliance status of the original CD214C-T24ALF.

Q: What is the operating temperature range difference between substitutes? A: Most substitutes operate -55°C to 150°C or -65°C to 150°C. SMLJ24A-TP extends to -55°C to 175°C. Verify application temperature requirements before selection.

Q: Can higher-rated parts like 5.0SMDJ24A-T7 be used in place of the original CD214C-T24ALF? A: Yes. The 5.0SMDJ24A-T7 maintains identical voltage specifications (24V standoff, 26.7V breakdown, 38.9V clamping) with enhanced current (129A) and power (5000W) ratings. It is suitable for applications where additional transient energy absorption capacity is beneficial or required.

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