CD214L-T64ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T64ALF is a unidirectional transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 64V reverse standoff voltage with 103V maximum clamping voltage and 29.2A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, necessitating identification of active equivalent and substitute components that maintain electrical and mechanical compatibility for new designs or production continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	64V	V
Voltage - Breakdown (Min)	71.1V	V
Voltage - Clamping (Max) @ Ipp	103V	V
Current - Peak Pulse (10/1000µs)	29.2A	A
Power - Peak Pulse	3000W	W
Package / Case	DO-214AB, SMC	—
Operating Temperature Range	-55°C to 150°C	°C (TJ)
Type	Zener	—
Unidirectional Channels	1	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the CD214L-T64ALF is determined by strict equivalence across the following critical parameters:

Primary Equivalence Criteria:

Voltage - Reverse Standoff: 64V (±tolerance)
Voltage - Clamping (Max) @ Ipp: 103V
Package / Case: DO-214AB (SMC)
Unidirectional Channels: 1
Mounting Type: Surface Mount
Type: Zener

Secondary Compatibility Factors:

Current - Peak Pulse (10/1000µs): 29.2A minimum for direct replacement
Power - Peak Pulse: 3000W minimum for direct replacement
Operating Temperature Range: -55°C to 150°C minimum
RoHS3 Compliance required

Substitute parts are grouped into two categories:

Direct Equivalents maintain all primary and secondary parameters within specification, enabling drop-in replacement without circuit redesign.

Similar Substitutes maintain primary voltage and package parameters but may differ in peak pulse current, power dissipation, or operating temperature range. These require application-level verification to confirm suitability for the intended circuit function.

Parameter Comparison

Part Number	Manufacturer	Product Status	VWM (Typ) [V]	VBR (Min) [V]	VC (Max) @ Ipp [V]	Ipp (10/1000µs) [A]	Power [W]	Temp Range [°C]	Package	RoHS
CD214L-T64ALF	Bourns Inc.	Obsolete	64	71.1	103	29.2	3000	-55 to 150	DO-214AB (SMC)	ROHS3
SMLJ64A	Bourns Inc.	Active	64	71.1	103	29.2	3000	-55 to 150	DO-214AB (SMC)	ROHS3
SMDJ64A	Alpha & Omega Semiconductor Inc.	Active	64	71.1	103	29.2	3000	-55 to 150	DO-214AB (SMC)	ROHS3
5.0SMDJ64A	Taiwan Semiconductor Corporation	Active	64	71.1	103	48.6	5000	-55 to 175	DO-214AB (SMC)	ROHS3
5.0SMDJ64A-T7	Littelfuse Inc.	Active	64	71.1	103	48.6	5000	-65 to 150	DO-214AB (SMC)	ROHS3
SMCJ64A	Meritek	Active	64	71.1	103	14.56	1500	-55 to 150	DO-214AB (SMC)	ROHS3
SMCJ64A-TP	Micro Commercial Co	Active	64	71.1	103	14.6	1500	-55 to 175	DO-214AB (SMC)	ROHS3
TPSMC75A	Littelfuse	Active	64.1	71.3	103	14.8	1500	-55 to 150	DO-214AB (SMC)	ROHS3
TPSMC82A	Littelfuse Inc.	Active	70.1	77.9	113	14.6	1500	-55 to 150	DO-214AB (SMC)	ROHS3

Engineering Selection Recommendations

Direct Replacement (No Circuit Redesign Required):

SMLJ64A (Bourns Inc., Active) and SMDJ64A (Alpha & Omega Semiconductor Inc., Active) are direct electrical and mechanical equivalents to the CD214L-T64ALF. Both maintain identical voltage parameters (64V standoff, 103V clamping), peak pulse current (29.2A), power dissipation (3000W), and operating temperature range (-55°C to 150°C). Both are ROHS3 compliant and packaged in DO-214AB (SMC). SMLJ64A is available in Tape & Reel packaging with 12,321 units in stock. SMDJ64A is available with 17,100 units in stock. These parts enable immediate production continuity for the obsolete CD214L-T64ALF.

Enhanced Performance Substitutes (Circuit Verification Required):

5.0SMDJ64A (Taiwan Semiconductor Corporation, Active) and 5.0SMDJ64A-T7 (Littelfuse Inc., Active) maintain identical voltage specifications but provide increased peak pulse current (48.6A) and power dissipation (5000W). These parts are suitable for applications requiring higher transient energy absorption. Operating temperature range extends to 175°C for 5.0SMDJ64A. Both are ROHS3 compliant in DO-214AB (SMC) packaging.

Lower Power Substitutes (Application-Dependent):

SMCJ64A (Meritek, Active), SMCJ64A-TP (Micro Commercial Co, Active), and TPSMC75A (Littelfuse, Active) maintain voltage equivalence but operate at reduced peak pulse current (14.56A to 14.8A) and power dissipation (1500W). These parts are suitable only for applications with lower transient energy requirements. SMCJ64A-TP and TPSMC75A offer extended operating temperature to 175°C and -55°C respectively. TPSMC75A carries AEC-Q101 automotive qualification.

Non-Equivalent Part:

TPSMC82A (Littelfuse Inc., Active) exhibits different voltage parameters (70.1V standoff, 113V clamping) and is not suitable as a substitute for the CD214L-T64ALF without circuit redesign.

Frequently Asked Questions (FAQ)

Q: Can SMLJ64A directly replace CD214L-T64ALF without any circuit modifications?

A: Yes. SMLJ64A is a direct equivalent with identical voltage ratings (64V standoff, 103V clamping), peak pulse current (29.2A), power dissipation (3000W), operating temperature range (-55°C to 150°C), and DO-214AB (SMC) packaging. No circuit redesign is required.

Q: What is the difference between SMDJ64A and 5.0SMDJ64A?

A: Both maintain identical voltage specifications (64V standoff, 103V clamping). The primary difference is peak pulse current and power dissipation: SMDJ64A handles 29.2A and 3000W, while 5.0SMDJ64A handles 48.6A and 5000W. The 5.0SMDJ64A is suitable for higher transient energy applications. Both use DO-214AB (SMC) packaging.

Q: Are lower-power alternatives like SMCJ64A suitable replacements?

A: SMCJ64A maintains voltage equivalence (64V standoff, 103V clamping) and DO-214AB (SMC) packaging but operates at reduced peak pulse current (14.56A) and power dissipation (1500W). Substitution is valid only if the application's transient energy requirements do not exceed these ratings. Circuit-level verification is required.

Q: Does TPSMC75A offer any advantages over direct equivalents?

A: TPSMC75A maintains voltage equivalence (64.1V standoff, 103V clamping) and offers AEC-Q101 automotive qualification. However, it operates at reduced peak pulse current (14.8A) and power dissipation (1500W). It is suitable for automotive applications with lower transient energy requirements.

Q: Why is TPSMC82A not recommended as a substitute?

A: TPSMC82A exhibits different voltage parameters (70.1V standoff, 113V clamping) compared to the CD214L-T64ALF (64V standoff, 103V clamping). These voltage differences require circuit redesign and are not compatible with the original design intent.

Q: What packaging options are available for substitute parts?

A: All substitute parts use DO-214AB (SMC) surface-mount packaging, matching the CD214L-T64ALF. Tape & Reel (TR) packaging is available for SMLJ64A, 5.0SMDJ64A-T7, SMCJ64A-TP, and TPSMC75A, suitable for automated assembly processes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original CD214L-T64ALF.

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