CD214C-T85ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T85ALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., classified as a unidirectional Zener-type device in the DO-214AB (SMC) surface mount package. This component is designed for general-purpose transient voltage suppression applications with an 85V reverse standoff voltage and 137V maximum clamping voltage. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Voltage - Reverse Standoff (Typ)	85V
Voltage - Breakdown (Min)	94.4V
Voltage - Clamping (Max) @ Ipp	137V
Current - Peak Pulse (10/1000µs)	10.4A
Power - Peak Pulse	1500W
Package / Case	DO-214AB, SMC
Operating Temperature Range	-55°C ~ 150°C (TJ)
Type	Zener, Unidirectional
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the CD214C-T85ALF is determined by strict electrical and mechanical parameter matching:

Primary Substitution Criteria:

Voltage - Reverse Standoff: 85V (exact match required)
Voltage - Clamping (Max) @ Ipp: 137V (exact match required)
Package / Case: DO-214AB, SMC (exact match required)
Type: Zener, Unidirectional (exact match required)
Current - Peak Pulse (10/1000µs): 10.4A minimum (equal or higher acceptable)
Power - Peak Pulse: 1500W minimum (equal or higher acceptable)

Substitute parts are grouped into two categories:

Direct Equivalents (Current - Peak Pulse: 10.4A - 11A, Power - Peak Pulse: 1500W):

SMCJ85A (MDD)
SMCJ85A-13-F (Diodes Incorporated)
SMCJ85A-HR (Littelfuse Inc.)
SMCJ85A-HRA (Littelfuse Inc.)
SMCJ85A-HRAT7 (Littelfuse Inc.)
SMCJ85A-TP (Micro Commercial Co)

Higher-Capacity Alternatives (Current - Peak Pulse: 36.5A, Power - Peak Pulse: 5000W):

5.0SMDJ85A (Taiwan Semiconductor Corporation)
5.0SMDJ85A-T7 (Littelfuse)

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff	Voltage - Clamping (Max) @ Ipp	Current - Peak Pulse (10/1000µs)	Power - Peak Pulse	Package	Operating Temperature	Product Status
CD214C-T85ALF	Bourns Inc.	85V	137V	10.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Obsolete
SMCJ85A	MDD	85V	137V	11A	1500W	DO-214AB, SMC	-50°C ~ 150°C	Active
SMCJ85A-13-F	Diodes Incorporated	85V	137V	10.4A	1500W	DO-214AB, SMC	-55°C ~ 150°C	Active
SMCJ85A-HR	Littelfuse Inc.	85V	137V	11A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ85A-HRA	Littelfuse Inc.	85V	137V	11A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ85A-HRAT7	Littelfuse Inc.	85V	137V	11A	1500W	DO-214AB, SMC	-65°C ~ 150°C	Active
SMCJ85A-TP	Micro Commercial Co	85V	137V	11A	1500W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ85A	Taiwan Semiconductor Corporation	85V	137V	36.5A	5000W	DO-214AB, SMC	-55°C ~ 175°C	Active
5.0SMDJ85A-T7	Littelfuse	85V	137V	36.5A	5000W	DO-214AB, SMC	-65°C ~ 150°C	Active

Engineering Selection Recommendations

For Direct Replacement (1:1 Electrical and Mechanical Compatibility):

Select from SMCJ85A-13-F (Diodes Incorporated), SMCJ85A-HR (Littelfuse Inc.), SMCJ85A-HRA (Littelfuse Inc.), SMCJ85A-HRAT7 (Littelfuse Inc.), or SMCJ85A-TP (Micro Commercial Co). These parts maintain identical voltage specifications, clamping characteristics, and power ratings as the original CD214C-T85ALF. All are ROHS3 compliant with MSL 1 rating. SMCJ85A-13-F matches the original operating temperature range (-55°C ~ 150°C). SMCJ85A-TP offers the widest operating temperature range (-55°C ~ 175°C).

For Higher-Capacity Applications:

The 5.0SMDJ85A (Taiwan Semiconductor Corporation) and 5.0SMDJ85A-T7 (Littelfuse) provide 36.5A peak pulse current and 5000W peak pulse power, suitable for applications requiring enhanced transient suppression capability while maintaining the same voltage specifications. These parts are physically compatible with the DO-214AB (SMC) footprint.

Compliance Considerations:

All substitute parts listed are ROHS3 compliant. MDD's SMCJ85A is REACH Unaffected; all Littelfuse and Diodes Incorporated variants are REACH Unaffected. Micro Commercial Co's SMCJ85A-TP is REACH Unaffected. Taiwan Semiconductor Corporation's 5.0SMDJ85A is REACH Unaffected.

Frequently Asked Questions (FAQ)

Q: Can SMCJ85A-TP be used as a direct replacement for CD214C-T85ALF?

A: Yes. SMCJ85A-TP maintains identical voltage specifications (85V reverse standoff, 137V clamping), current rating (11A peak pulse), power rating (1500W), and package format (DO-214AB, SMC). The extended operating temperature range (-55°C ~ 175°C) provides additional margin compared to the original specification.

Q: What is the difference between the direct equivalents and the 5.0SMDJ85A series?

A: Direct equivalents (SMCJ85A variants) maintain the original 10.4A-11A peak pulse current and 1500W power rating. The 5.0SMDJ85A series provides 36.5A peak pulse current and 5000W power rating, offering higher transient suppression capacity. Both maintain identical voltage specifications and package compatibility.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in DO-214AB (SMC) surface mount package format, compatible with the original CD214C-T85ALF footprint. Packaging options include Tape & Reel (TR) for automated assembly.

Q: Which substitute part has the widest operating temperature range?

A: SMCJ85A-TP (Micro Commercial Co) and 5.0SMDJ85A (Taiwan Semiconductor Corporation) both support -55°C ~ 175°C operating temperature range, providing the widest margin compared to the original -55°C ~ 150°C specification.

Q: Can I use a higher-capacity part (5.0SMDJ85A) in place of the original CD214C-T85ALF?

A: Yes. The 5.0SMDJ85A maintains identical voltage specifications and package compatibility. The increased current and power ratings provide enhanced transient suppression without affecting circuit operation. This substitution is suitable for applications where additional margin is beneficial.

Q: Are all substitute parts RoHS compliant?

A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity level, meeting current environmental and reliability standards.

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