CD214L-T43CALF Equivalent & Substitute Parts

Part Overview

The CD214L-T43CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 43V reverse standoff voltage with 69.4V maximum clamping voltage and 43.2A peak pulse current capability in a DO-214AB (SMC) package. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production support.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	43V
Voltage - Breakdown (Min)	47.8V
Voltage - Clamping (Max) @ Ipp	69.4V
Current - Peak Pulse (10/1000µs)	43.2A
Power - Peak Pulse	3000W (3kW)
Operating Temperature Range	-55°C ~ 150°C (TJ)
Package / Case	DO-214AB, SMC
Type	Zener, Bidirectional
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CD214L-T43CALF is determined by the following critical parameters:

Voltage - Reverse Standoff: 43V (exact match required)
Voltage - Clamping (Max) @ Ipp: 69.4V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Type: Zener, Bidirectional, 1 Channel (exact match required)
Current - Peak Pulse: 43.2A minimum (equal or higher acceptable)
Power - Peak Pulse: 3000W minimum (equal or higher acceptable)
Operating Temperature: -55°C minimum lower bound, 150°C minimum upper bound
RoHS3 Compliance: Required

Substitute parts are grouped into two categories based on electrical performance alignment:

Direct Equivalents (Matched Performance): Parts with identical or near-identical peak pulse current (43.2A ±0.1A) and power dissipation (3000W).

Enhanced Performance Substitutes (Higher Current/Power Rating): Parts with higher peak pulse current (72.1A) and power dissipation (5000W) that maintain all voltage parameters and package specifications.

Lower Performance Alternatives: Parts with reduced peak pulse current (21.61A–21.7A) and power dissipation (1500W) that meet voltage and package requirements but provide reduced transient protection margin.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max)	Current - Peak Pulse	Power - Peak Pulse	Operating Temp Range	Package	Product Status
CD214L-T43CALF	Bourns Inc.	43V	69.4V	43.2A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Obsolete
SMLJ43CA	Bourns Inc.	43V	69.4V	43.2A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
5.0SMDJ43CA	MDE Semiconductor Inc	43V	69.4V	72.1A	5000W	-55°C ~ 150°C	DO-214AB, SMC	Active
5.0SMDJ43CA-T7	Littelfuse Inc.	43V	69.4V	72.1A	5000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMCJ43CA	Meritek	43V	69.4V	21.61A	1500W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMCJ43CA-TP	Micro Commercial Co	43V	69.4V	21.7A	1500W	-55°C ~ 175°C	DO-214AB, SMC	Active
SMDJ43CA	Alpha & Omega Semiconductor Inc.	43V	69.4V	43.3A	3000W	-55°C ~ 150°C	DO-214AB, SMC	Active
SMDJ43CA-HR	Littelfuse Inc.	43V	69.4V	43.2A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMDJ43CA-HRA	Littelfuse Inc.	43V	69.4V	43.2A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active
SMDJ43CA-HRAT7	Littelfuse Inc.	43V	69.4V	43.2A	3000W	-65°C ~ 150°C	DO-214AB, SMC	Active

Engineering Selection Recommendations

Primary Recommendation: SMLJ43CA (Bourns Inc.)

The SMLJ43CA is the direct equivalent replacement for the obsolete CD214L-T43CALF. Both are manufactured by Bourns Inc. and share identical electrical specifications: 43V reverse standoff, 69.4V clamping voltage, 43.2A peak pulse current, and 3000W power dissipation. The SMLJ43CA is in active production status with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). This part provides seamless form-fit-function compatibility with no design modifications required.

Secondary Recommendation: SMDJ43CA-HR or SMDJ43CA-HRA (Littelfuse Inc.)

These Littelfuse parts maintain identical electrical performance to the original (43.2A, 3000W) and offer extended lower operating temperature range (-65°C vs. -55°C). Both are active production parts with ROHS3 compliance. The -HR and -HRA variants are suitable for applications requiring enhanced low-temperature performance while maintaining all voltage and current specifications.

Alternative for Enhanced Transient Protection: 5.0SMDJ43CA-T7 (Littelfuse Inc.)

This part provides higher peak pulse current (72.1A) and power dissipation (5000W) while maintaining all voltage parameters and package specifications. It is suitable for applications requiring additional transient protection margin. Extended lower operating temperature range (-65°C) is included. ROHS3 compliant and active production status.

Not Recommended for Direct Substitution: SMCJ43CA and SMCJ43CA-TP

These parts have reduced peak pulse current (21.61A–21.7A) and power dissipation (1500W), representing 50% lower transient protection capability than the original. Use only if application requirements explicitly allow reduced transient energy absorption.

Frequently Asked Questions (FAQ)

Q: Can I use SMLJ43CA as a direct replacement for CD214L-T43CALF?

A: Yes. The SMLJ43CA is electrically and mechanically identical to the CD214L-T43CALF. Both feature 43V reverse standoff, 69.4V clamping voltage, 43.2A peak pulse current, 3000W power dissipation, and DO-214AB (SMC) packaging. The SMLJ43CA is in active production, making it the recommended substitute for the obsolete CD214L-T43CALF.

Q: What is the difference between the 3000W and 5000W rated parts?

A: The 5.0SMDJ43CA and 5.0SMDJ43CA-T7 provide higher peak pulse current (72.1A) and power dissipation (5000W) compared to the original 43.2A and 3000W. All voltage parameters remain identical. The higher power rating provides greater transient energy absorption capability. Select based on application transient stress requirements.

Q: Are the lower-rated parts (1500W) suitable substitutes?

A: The SMCJ43CA and SMCJ43CA-TP parts meet voltage and package requirements but provide only 50% of the original power dissipation (1500W vs. 3000W). These are suitable only if application transient stress levels are confirmed to be within the lower power rating. Verify application requirements before selection.

Q: Do all substitute parts have the same operating temperature range?

A: No. The original CD214L-T43CALF and most substitutes operate from -55°C to 150°C. The Littelfuse variants (5.0SMDJ43CA-T7, SMDJ43CA-HR, SMDJ43CA-HRA, SMDJ43CA-HRAT7) extend the lower temperature limit to -65°C. The SMCJ43CA-TP extends the upper limit to 175°C. Verify application temperature requirements when selecting.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant and suitable for applications requiring RoHS compliance.

Q: What is the difference between SMDJ43CA-HR, SMDJ43CA-HRA, and SMDJ43CA-HRAT7?

A: All three parts share identical electrical specifications (43V, 69.4V, 43.2A, 3000W) and extended low-temperature operation (-65°C). The designations (-HR, -HRA, -HRAT7) indicate different packaging or tape configurations. Verify packaging requirements with your supplier before selection.

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