CD214C-T70ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T70ALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode features a 70V reverse standoff voltage with 113V maximum clamping voltage and 13.3A 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 requirements.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	70V
Voltage - Breakdown (Min)	77.8V
Voltage - Clamping (Max) @ Ipp	113V
Current - Peak Pulse (10/1000µs)	13.3A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Mounting Type	Surface Mount
Operating Temperature	-55°C ~ 150°C
Type	Zener
Unidirectional Channels	1
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CD214C-T70ALF is determined by strict alignment with the following critical parameters:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 70V (exact match required)
Voltage - Breakdown (Min): 77.8V (exact match required)
Voltage - Clamping (Max) @ Ipp: 113V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Mounting Type: Surface Mount (exact match required)
Unidirectional Channels: 1 (exact match required)
Type: Zener (exact match required)

Secondary Consideration:

Current - Peak Pulse (10/1000µs): Minimum 13.3A acceptable; higher ratings permissible for enhanced protection margin
Power - Peak Pulse: Minimum 1500W acceptable; higher ratings permissible
Operating Temperature Range: Must encompass or exceed -55°C ~ 150°C

Substitute parts are categorized as Direct Equivalents when all primary criteria match exactly with identical current and power ratings. Parts with higher current or power ratings are classified as Similar (higher performance variants) and remain functionally compatible within the same voltage protection class.

Parameter Comparison

Part Number	Manufacturer	VWM (70V)	VBR Min (77.8V)	VC Max (113V)	Ipp (A)	Power (W)	Package	Temp Range	Status
CD214C-T70ALF	Bourns Inc.	70V	77.8V	113V	13.3	1500	DO-214AB (SMC)	-55°C ~ 150°C	Obsolete
SMCJ70A	Meritek	70V	77.8V	113V	13.27	1500	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMCJ70A-HR	Littelfuse Inc.	70V	77.8V	113V	13.3	1500	DO-214AB (SMC)	-65°C ~ 150°C	Active
SMCJ70A-T7	Littelfuse Inc.	70V	77.8V	113V	13.3	1500	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMCJ70A-TP	Micro Commercial Co	70V	77.8V	113V	13.3	1500	DO-214AB (SMC)	-55°C ~ 175°C	Active
SMDJ70A	Alpha & Omega Semiconductor Inc.	70V	77.8V	113V	26.6	3000	DO-214AB (SMC)	-55°C ~ 150°C	Active
SMDJ70A-T7	Littelfuse	70V	77.8V	113V	26.5	3000	DO-214AB (SMC)	-65°C ~ 150°C	Active
5.0SMDJ70A	Taiwan Semiconductor Corporation	70V	77.8V	113V	44.3	5000	DO-214AB (SMC)	-55°C ~ 175°C	Active
5.0SMDJ70A-T7	Littelfuse Inc.	70V	77.8V	113V	44.3	5000	DO-214AB (SMC)	-65°C ~ 150°C	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for Drop-In Replacement):

SMCJ70A-T7 (Littelfuse Inc.) and SMCJ70A-TP (Micro Commercial Co) are the primary direct equivalents. Both maintain identical voltage specifications (70V VWM, 77.8V VBR, 113V VC), current rating (13.3A), and power dissipation (1500W) as the CD214C-T70ALF. Both are active products with ROHS3 compliance and MSL 1 rating. SMCJ70A-TP offers extended operating temperature to 175°C, providing additional thermal margin. SMCJ70A (Meritek) is functionally equivalent with marginally lower peak pulse current (13.27A), remaining within acceptable tolerance.

Higher Performance Alternatives (Enhanced Protection):

SMDJ70A series parts (26.5–26.6A peak pulse, 3000W) and 5.0SMDJ70A series parts (44.3A peak pulse, 5000W) maintain identical voltage protection characteristics while providing increased current handling and power dissipation capacity. These are suitable for applications requiring enhanced transient suppression margin or higher energy absorption. All listed alternatives are active products with ROHS3 compliance.

Compliance & Certification:

All substitute parts listed are ROHS3 compliant and carry EAR99 ECCN classification. Littelfuse variants (SMCJ70A-HR, SMCJ70A-T7, SMDJ70A-T7, 5.0SMDJ70A-T7) offer extended lower temperature rating (-65°C minimum) compared to the original specification (-55°C minimum), providing additional design margin for cold-environment applications.

Frequently Asked Questions (FAQ)

Q: Can SMDJ70A or 5.0SMDJ70A be used as direct replacements for CD214C-T70ALF?

A: Yes. All listed parts maintain identical voltage protection parameters (70V VWM, 77.8V VBR, 113V VC) and package format (DO-214AB SMC). SMDJ70A and 5.0SMDJ70A variants feature higher peak pulse current and power ratings, making them functionally compatible with enhanced protection capability. No circuit redesign is required.

Q: What is the difference between SMCJ70A and SMDJ70A designations?

A: The designations reflect different power rating classes. SMCJ70A is rated for 1500W peak pulse power with 13.3A peak current. SMDJ70A is rated for 3000W peak pulse power with 26.6A peak current. Both maintain identical voltage clamping characteristics and package format. Selection depends on application transient energy requirements.

Q: Are all substitute parts available in tape and reel packaging?

A: Yes. All listed substitute parts are supplied in Tape & Reel (TR) packaging suitable for automated assembly processes. Inventory availability varies by manufacturer and distributor.

Q: Does operating temperature range affect substitution eligibility?

A: Operating temperature range does not disqualify substitution. The CD214C-T70ALF specifies -55°C ~ 150°C. Littelfuse variants extend the lower limit to -65°C, providing additional margin. Micro Commercial Co SMCJ70A-TP extends the upper limit to 175°C. Both variations are acceptable for applications within the original temperature specification.

Q: What is the significance of the "-T7" or "-TP" suffix in part numbers?

A: These suffixes denote packaging and tape configuration variants. "-T7" indicates specific tape reel specifications per Littelfuse standards. "-TP" indicates tape packaging per Micro Commercial Co specifications. Both are functionally equivalent to the base part number and do not affect electrical performance or substitution eligibility.

Q: Can SMCJ70A (Meritek) be used if SMCJ70A-T7 (Littelfuse) is unavailable?

A: Yes. Meritek SMCJ70A maintains identical voltage specifications and current rating (13.27A vs. 13.3A, within tolerance). Both are active products with ROHS3 compliance. The primary difference is manufacturer and packaging configuration, not electrical performance.

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