CD214L-T40CALF Equivalent & Substitute Parts

Part Overview

The CD214L-T40CALF 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 40V reverse standoff voltage with 64.5V maximum clamping voltage and 46.4A 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.

Substiute Parts

CD214L-T40CALF

Bourns Inc.In Stock: 1073CD214L-T40CALF Datasheet

Current PartRFQ

SMLJ40CA

Bourns Inc.In Stock: 20328SMLJ40CA Datasheet

DirectRFQ

5.0SMDJ40CA

MDE Semiconductor IncIn Stock: 53915.0SMDJ40CA Datasheet

SimilarRFQ

5.0SMDJ40CA-T7

Littelfuse Inc.In Stock: 21185.0SMDJ40CA-T7 Datasheet

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SMCJ40CA

MDDIn Stock: 80210SMCJ40CA Datasheet

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SMCJ40CA

MDDIn Stock: 80210SMCJ40CA Datasheet

SimilarRFQ

SMCJ40CA-TR

STMicroelectronicsIn Stock: 10315SMCJ40CA-TR Datasheet

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SMDJ40CA

Alpha & Omega Semiconductor Inc.In Stock: 8789SMDJ40CA Datasheet

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SMDJ40CA-HR

LittelfuseIn Stock: 1087SMDJ40CA-HR Datasheet

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SMLJ40CA-TP

Micro Commercial CoIn Stock: 9701SMLJ40CA-TP Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD214L-T40CALF is determined by the following critical parameters:

Primary Matching Criteria:

• Voltage - Reverse Standoff (Typ): 40V
• Voltage - Clamping (Max) @ Ipp: 64.5V
• Voltage - Breakdown (Min): 44.4V
• Package / Case: DO-214AB, SMC
• Mounting Type: Surface Mount
• Type: Zener, Bidirectional

Secondary Considerations:

• Current - Peak Pulse (10/1000µs): 46.4A (minimum acceptable)
• Power - Peak Pulse: 3000W (minimum acceptable)
• Operating Temperature Range: -55°C ~ 150°C (minimum acceptable)
• RoHS3 Compliance

Substitute parts are grouped into two categories:

Direct Equivalents: Parts matching all primary criteria with identical or superior electrical performance (current and power ratings ≥ original specifications).

Compatible Alternatives: Parts matching all primary criteria but with variations in secondary parameters (lower current/power ratings or different temperature ranges) that may be acceptable depending on application requirements.

Parameter Comparison

Engineering Selection Recommendations

Preferred Direct Equivalents (Identical or Superior Performance):

SMLJ40CA (Bourns Inc.) is the primary recommended substitute. This part is manufactured by the original supplier, maintains identical electrical specifications, and is in active production status. It provides direct functional equivalence with confirmed availability.

SMLJ40CA-TP (Micro Commercial Co) offers identical electrical performance with an extended operating temperature range (-55°C ~ 175°C), providing additional thermal margin for applications requiring higher temperature operation.

SMDJ40CA (Alpha & Omega Semiconductor Inc.) and SMDJ40CA-HR (Littelfuse) provide equivalent performance with marginal improvements in peak pulse current (46.5A–46.6A) and are suitable for direct substitution.

Enhanced Performance Alternatives:

5.0SMDJ40CA (MDE Semiconductor Inc.) and 5.0SMDJ40CA-T7 (Littelfuse Inc.) offer superior current handling (77.6A) and power dissipation (5000W), providing increased design margin for high-stress transient protection applications.

Lower Performance Alternatives:

SMCJ40CA (MDD) and SMCJ40CA-TR (STMicroelectronics) feature reduced peak pulse current (23.3A) and power ratings (1500W). These parts are suitable only for applications with lower transient energy requirements and should not be used as direct replacements in designs requiring the full 46.4A / 3000W specification.

All recommended substitutes maintain ROHS3 compliance and are in active production status, ensuring long-term supply availability.

Frequently Asked Questions (FAQ)

Q: Can SMCJ40CA be used as a direct replacement for CD214L-T40CALF?

A: SMCJ40CA matches the voltage specifications (40V standoff, 64.5V clamping) and package type (DO-214AB, SMC) but has reduced current and power ratings (23.3A / 1500W versus 46.4A / 3000W). It is suitable only for applications with lower transient energy requirements. For designs requiring the full original specification, use SMLJ40CA, SMDJ40CA, or 5.0SMDJ40CA instead.

Q: What is the difference between SMLJ40CA and 5.0SMDJ40CA?

A: Both parts maintain the same voltage specifications (40V standoff, 64.5V clamping) and package type. The primary difference is current and power handling: SMLJ40CA provides 46.4A / 3000W, while 5.0SMDJ40CA provides 77.6A / 5000W. The 5.0SMDJ40CA is suitable for applications requiring higher transient energy dissipation.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are ROHS3 compliant, matching the compliance status of the original CD214L-T40CALF.

Q: Does operating temperature range affect substitution suitability?

A: Operating temperature range is a secondary consideration. The original part operates from -55°C to 150°C. SMLJ40CA-TP extends this to -55°C to 175°C, providing additional thermal margin. SMCJ40CA has a reduced lower limit (-50°C), which may be unsuitable for applications requiring full -55°C operation. Verify application temperature requirements before selection.

Q: Can I use SMDJ40CA-HR instead of SMLJ40CA?

A: Yes. SMDJ40CA-HR provides equivalent electrical performance (40V standoff, 64.5V clamping, 46.5A peak pulse, 3000W power) with an extended lower operating temperature limit (-65°C versus -55°C). Both are suitable direct replacements.

Q: What packaging options are available for these substitutes?

A: All substitute parts use the DO-214AB (SMC) surface mount package, matching the original CD214L-T40CALF. Packaging formats vary (Tape & Reel, Cut Tape, or unspecified), but the component package remains consistent for PCB compatibility.