CD214L-T78CALF Equivalent & Substitute Parts

Part Overview

The CD214L-T78CALF 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 78V reverse standoff voltage with 126V maximum clamping voltage and 22.8A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214L-T78CALF

Bourns Inc.In Stock: 969CD214L-T78CALF Datasheet

Current PartRFQ

SMLJ78CA

Bourns Inc.In Stock: 13545SMLJ78CA Datasheet

DirectRFQ

5.0SMDJ78CA

MDE Semiconductor IncIn Stock: 24025.0SMDJ78CA Datasheet

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SMCJ78CA

MDDIn Stock: 2736SMCJ78CA Datasheet

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SMCJ78CA

MDDIn Stock: 2736SMCJ78CA Datasheet

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SMCJ78CA-TP

Micro Commercial CoIn Stock: 3942SMCJ78CA-TP Datasheet

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SMDJ78CA

Alpha & Omega Semiconductor Inc.In Stock: 799SMDJ78CA Datasheet

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TV15C780JB-HF

Comchip TechnologyIn Stock: 1159TV15C780JB-HF Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD214L-T78CALF is determined by the following critical electrical and mechanical parameters:

• Voltage Rating: Reverse standoff voltage of 78V, breakdown voltage minimum of 86.7V, and clamping voltage maximum of 126V
• Current Handling: Peak pulse current capability of 22.8A at 10/1000µs pulse width
• Power Dissipation: Peak pulse power rating of 3000W (3kW)
• Package Compatibility: DO-214AB (SMC) surface-mount package
• Bidirectional Channels: Single channel (1) configuration
• Type: Zener diode technology
• Temperature Range: Operating temperature from -55°C to 150°C minimum

Substitute parts are grouped into two categories:

Direct Equivalents maintain all critical electrical parameters (78V standoff, 126V clamp, 22.8A peak pulse, 3000W power) with identical or superior performance characteristics and active product status.

Compatible Alternatives share the same voltage ratings and package but may differ in peak pulse current (11.9A to 39.7A) and power dissipation (1500W to 5000W), requiring application-level verification that the substitute's current and power ratings meet or exceed circuit requirements.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: SMLJ78CA (Bourns Inc.)

The SMLJ78CA is the direct equivalent replacement for the obsolete CD214L-T78CALF. It maintains identical electrical specifications (78V standoff, 126V clamp, 22.8A peak pulse, 3000W power) and is manufactured by the same supplier (Bourns Inc.). The part is active in production with 13,454 units in stock, ensuring long-term availability. It carries ROHS3 compliance and MSL 1 rating, matching the original part's environmental certifications.

Secondary Recommendation: SMDJ78CA (Alpha & Omega Semiconductor Inc.)

The SMDJ78CA provides equivalent performance with marginally higher peak pulse current (23.9A versus 22.8A) and maintains the 3000W power rating. This part is active with 713 units available and meets ROHS3 compliance. The slight increase in current capability provides additional design margin without compromising compatibility.

Alternative for Higher Power Applications: 5.0SMDJ78CA (MDE Semiconductor Inc)

For applications requiring enhanced transient protection, the 5.0SMDJ78CA offers superior current handling (39.7A) and power dissipation (5000W). Voltage ratings remain identical. This part is suitable only when circuit design can accommodate the increased current and power specifications. 2,300 units are in stock.

Lower Power Alternative: SMCJ78CA-TP (Micro Commercial Co) or TV15C780JB-HF (Comchip Technology)

These parts reduce peak pulse current to 11.9A and power to 1500W. Selection is appropriate only for applications where the original 22.8A specification exceeds circuit requirements. SMCJ78CA-TP extends the operating temperature range to 175°C, providing additional thermal margin in high-temperature environments.

Frequently Asked Questions (FAQ)

Q: Can I use SMCJ78CA or TV15C780JB-HF as direct replacements for CD214L-T78CALF?

A: These parts share identical voltage ratings (78V standoff, 126V clamp) and package (DO-214AB, SMC) but have reduced peak pulse current (11.9A versus 22.8A) and power dissipation (1500W versus 3000W). They are compatible only if your circuit's transient current does not exceed 11.9A. If the original design requires 22.8A capability, these alternatives are unsuitable.

Q: What is the difference between SMLJ78CA and SMDJ78CA?

A: Both parts maintain the critical voltage specifications and 3000W power rating. SMLJ78CA (Bourns) provides exactly 22.8A peak pulse current, while SMDJ78CA (Alpha & Omega) provides 23.9A. Both are electrically compatible with the original CD214L-T78CALF. Selection between them depends on supplier availability and procurement preferences.

Q: Is 5.0SMDJ78CA a suitable replacement?

A: The 5.0SMDJ78CA maintains identical voltage ratings and package but increases peak pulse current to 39.7A and power to 5000W. It is electrically compatible and provides enhanced protection margin. However, verify that your PCB layout, thermal management, and circuit design can accommodate the higher current and power specifications. This part is recommended only when additional transient protection is beneficial.

Q: Do all substitute parts have the same operating temperature range?

A: No. Most parts operate from -55°C to 150°C, but SMCJ78CA operates from -50°C to 150°C, and SMCJ78CA-TP extends to -55°C to 175°C. For applications requiring -55°C operation, avoid SMCJ78CA. For high-temperature environments above 150°C, SMCJ78CA-TP is the only option among these substitutes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the original CD214L-T78CALF. Moisture sensitivity level (MSL) is 1 (Unlimited) for all parts, indicating no special storage or handling requirements.

Q: What packaging options are available?

A: All substitute parts use the DO-214AB (SMC) surface-mount package, identical to the original. Most are available in Tape & Reel (TR) packaging for automated assembly. Verify packaging format with your supplier to ensure compatibility with your assembly process.