CD214L-T85ALF Equivalent & Substitute Parts

Part Overview

The CD214L-T85ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 85V reverse standoff voltage with 137V maximum clamping voltage and 20.8A peak pulse current. Housed in the DO-214AB (SMC) surface mount package, this component is designed for general-purpose transient voltage protection applications. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214L-T85ALF

Bourns Inc.In Stock: 917CD214L-T85ALF Datasheet

Current PartRFQ

SMLJ85A

Bourns Inc.In Stock: 9352SMLJ85A Datasheet

DirectRFQ

5.0SMDJ85A

Taiwan Semiconductor CorporationIn Stock: 184825.0SMDJ85A Datasheet

SimilarRFQ

5.0SMDJ85A-T7

LittelfuseIn Stock: 18965.0SMDJ85A-T7 Datasheet

SimilarRFQ

SMCJ85A

MDDIn Stock: 17966SMCJ85A Datasheet

SimilarRFQ

SMCJ85A

MDDIn Stock: 17966SMCJ85A Datasheet

SimilarRFQ

SMCJ85A-TP

Micro Commercial CoIn Stock: 3417SMCJ85A-TP Datasheet

SimilarRFQ

SMDJ85A

Alpha & Omega Semiconductor Inc.In Stock: 4587SMDJ85A Datasheet

SimilarRFQ

SMDJ85A-HR

Littelfuse Inc.In Stock: 1165SMDJ85A-HR Datasheet

SimilarRFQ

TPSMC91A

Littelfuse Inc.In Stock: 6419TPSMC91A Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD214L-T85ALF is determined by strict equivalence across the following critical parameters:

• Voltage - Reverse Standoff: 85V (nominal)
• Voltage - Breakdown (Min): 94.4V
• Voltage - Clamping (Max) @ Ipp: 137V
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Unidirectional Channels: 1
• Type: Zener

Substitute parts are categorized into two groups:

Direct Equivalents maintain all electrical parameters and differ only in product status (active vs. obsolete) or packaging format (bulk vs. tape & reel):

• SMLJ85A (Bourns Inc.)

Functional Equivalents maintain core voltage and package specifications but differ in peak pulse current and power dissipation ratings:

• 5.0SMDJ85A (Taiwan Semiconductor Corporation) — 36.5A peak pulse, 5000W power rating
• 5.0SMDJ85A-T7 (Littelfuse) — 36.5A peak pulse, 5000W power rating
• SMCJ85A (MDD) — 11A peak pulse, 1500W power rating
• SMCJ85A-TP (Micro Commercial Co) — 11A peak pulse, 1500W power rating
• SMDJ85A (Alpha & Omega Semiconductor Inc.) — 21.9A peak pulse, 3000W power rating
• SMDJ85A-HR (Littelfuse Inc.) — 21.9A peak pulse, 3000W power rating

Non-Equivalent Part (voltage mismatch):

• TPSMC91A (Littelfuse Inc.) — 77.8V reverse standoff, 125V clamping voltage; does not meet CD214L-T85ALF voltage specifications

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SMLJ85A

SMLJ85A is the direct functional equivalent of CD214L-T85ALF. Manufactured by Bourns Inc., it maintains identical electrical specifications (85V standoff, 137V clamping, 20.8A peak pulse, 3000W power) and package format. The part is currently in active production status, ensuring long-term availability. Both parts are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level). Selection of SMLJ85A provides the most direct replacement path with no design modification required.

Secondary Recommendations: SMDJ85A and SMDJ85A-HR

SMDJ85A (Alpha & Omega Semiconductor Inc.) and SMDJ85A-HR (Littelfuse Inc.) maintain identical voltage specifications and package format. Both deliver 21.9A peak pulse current and 3000W power dissipation, closely matching the original 20.8A / 3000W rating. SMDJ85A-HR extends the lower operating temperature limit to -65°C. Both parts are ROHS3 compliant and in active production. These options are suitable when SMLJ85A availability is constrained.

Higher Power Alternatives: 5.0SMDJ85A and 5.0SMDJ85A-T7

5.0SMDJ85A (Taiwan Semiconductor Corporation) and 5.0SMDJ85A-T7 (Littelfuse) maintain identical voltage specifications and package format but provide enhanced current handling (36.5A peak pulse) and power dissipation (5000W). These parts are suitable for applications requiring higher transient energy absorption. 5.0SMDJ85A-T7 extends the lower operating temperature to -65°C. Both are ROHS3 compliant and in active production.

Lower Power Alternatives: SMCJ85A and SMCJ85A-TP

SMCJ85A (MDD) and SMCJ85A-TP (Micro Commercial Co) maintain identical voltage specifications and package format but provide reduced current handling (11A peak pulse) and power dissipation (1500W). These parts are suitable only for applications with lower transient energy requirements. SMCJ85A-TP extends the upper operating temperature to 175°C. Both are ROHS3 compliant and in active production.

Not Recommended: TPSMC91A

TPSMC91A does not meet CD214L-T85ALF specifications. The part features 77.8V reverse standoff voltage and 125V clamping voltage, which fall below the required 85V / 137V ratings. This part is not a valid substitute.

Frequently Asked Questions (FAQ)

Q: Can SMLJ85A be used as a direct replacement for CD214L-T85ALF?

A: Yes. SMLJ85A is electrically and mechanically identical to CD214L-T85ALF. It maintains the same 85V standoff voltage, 137V clamping voltage, 20.8A peak pulse current, 3000W power rating, and DO-214AB (SMC) package. The primary difference is product status: SMLJ85A is in active production while CD214L-T85ALF is obsolete.

Q: What is the difference between direct equivalents and functional equivalents?

A: Direct equivalents (SMLJ85A) match all electrical parameters of the original part. Functional equivalents maintain core voltage specifications and package format but differ in peak pulse current and power dissipation ratings. Selection depends on whether the application requires exact parameter matching or can tolerate higher or lower power handling capability.

Q: Can I use SMCJ85A or SMCJ85A-TP as substitutes?

A: SMCJ85A and SMCJ85A-TP maintain the required 85V standoff and 137V clamping voltages and use the same DO-214AB (SMC) package. However, they provide only 11A peak pulse current and 1500W power dissipation compared to the original 20.8A / 3000W. These parts are suitable only if your application requires lower transient energy absorption.

Q: Are the higher-power alternatives (5.0SMDJ85A, 5.0SMDJ85A-T7) compatible?

A: Yes, from a voltage and package perspective. Both parts maintain 85V standoff and 137V clamping voltages in the DO-214AB (SMC) package. They provide enhanced current handling (36.5A) and power dissipation (5000W). These parts are suitable for applications requiring higher transient energy absorption without design modification.

Q: What does the operating temperature range difference mean for part selection?

A: Operating temperature range indicates the junction temperature limits under which the part functions within specification. CD214L-T85ALF operates from -55°C to 150°C. Some substitutes extend this range (e.g., 5.0SMDJ85A-T7 to -65°C, SMCJ85A-TP to 175°C). Select based on your application's thermal environment. Narrower ranges (e.g., SMCJ85A at -50°C to 150°C) may limit use in extreme cold conditions.

Q: Why is TPSMC91A not recommended?

A: TPSMC91A features 77.8V reverse standoff voltage and 125V clamping voltage, both below the CD214L-T85ALF specifications of 85V and 137V respectively. Using this part would result in inadequate transient voltage protection and circuit failure under specified surge conditions.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance status of CD214L-T85ALF.

Q: Does packaging format (bulk vs. tape & reel) affect electrical performance?

A: No. Packaging format affects only procurement and assembly logistics. Bulk and tape & reel versions of the same part number maintain identical electrical specifications and performance characteristics.