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CD214C-T78CALF Equivalent & Substitute Parts
Part Overview
The CD214C-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, 126V maximum clamping voltage, and 11.4A 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
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CD214C-T78CALF |
| Manufacturer | Bourns Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Voltage - Reverse Standoff (Typ) | 78V |
| Voltage - Breakdown (Min) | 86.7V |
| Voltage - Clamping (Max) @ Ipp | 126V |
| Current - Peak Pulse (10/1000µs) | 11.4A |
| Power - Peak Pulse | 1500W |
| Package / Case | DO-214AB, SMC |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution for the CD214C-T78CALF is determined by the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff: 78V (±tolerance)
- Voltage - Clamping (Max) @ Ipp: 126V (±tolerance)
- Voltage - Breakdown (Min): 86.7V (±tolerance)
- Package / Case: DO-214AB, SMC (mechanical compatibility)
- Mounting Type: Surface Mount
- Type: Zener (bidirectional TVS diode)
Secondary Consideration:
- Current - Peak Pulse (10/1000µs): Minimum 11.4A required; higher ratings are acceptable for direct substitution
- Power - Peak Pulse: Minimum 1500W required; higher ratings are acceptable
- Operating Temperature Range: Must encompass or exceed -55°C to 150°C
Substitute parts are grouped into two categories:
Direct Substitutes maintain identical electrical specifications (78V standoff, 126V clamp, 11.4A–11.9A peak pulse, 1500W power rating) with active product status and full compliance certifications.
Similar Substitutes maintain identical voltage parameters (78V standoff, 126V clamp) but feature higher peak pulse current (23.9A–39.7A) and higher power dissipation (3000W–5000W), providing enhanced transient protection capability while remaining mechanically and electrically compatible.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| CD214C-T78CALF | Bourns Inc. | 78V | 126V | 11.4A | 1500W | -55°C ~ 150°C | DO-214AB, SMC | Obsolete | ROHS3 Compliant |
| SMCJ78CA | MDD | 78V | 126V | 11.9A | 1500W | -50°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ78CA-HR | Littelfuse Inc. | 78V | 126V | 11.9A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ78CA-HRA | Littelfuse Inc. | 78V | 126V | 11.9A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ78CA-HRAT7 | Littelfuse Inc. | 78V | 126V | 11.9A | 1500W | -65°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMCJ78CA-TP | Micro Commercial Co | 78V | 126V | 11.9A | 1500W | -55°C ~ 175°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| SMDJ78CA | Alpha & Omega Semiconductor Inc. | 78V | 126V | 23.9A | 3000W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| 5.0SMDJ78CA | MDE Semiconductor Inc | 78V | 126V | 39.7A | 5000W | -55°C ~ 150°C | DO-214AB, SMC | Active | ROHS3 Compliant |
| 5.0SMLJ78CA-TP | Micro Commercial Co | 78V | 126V | 39.7A | 5000W | -55°C ~ 175°C | DO-214AB, SMC | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Substitutes (Preferred for Pin-Compatible Replacement):
SMCJ78CA (MDD), SMCJ78CA-HR (Littelfuse), SMCJ78CA-HRA (Littelfuse), SMCJ78CA-HRAT7 (Littelfuse), and SMCJ78CA-TP (Micro Commercial Co) are direct electrical equivalents with active product status. All maintain the 78V standoff voltage, 126V clamping voltage, and 1500W power rating. These parts are ROHS3 compliant and suitable for direct substitution in existing designs. SMCJ78CA-TP offers the widest operating temperature range (-55°C to 175°C), providing additional thermal margin for demanding applications.
Enhanced Protection Alternatives (Higher Current/Power Rating):
SMDJ78CA (Alpha & Omega Semiconductor Inc.), 5.0SMDJ78CA (MDE Semiconductor Inc.), and 5.0SMLJ78CA-TP (Micro Commercial Co) maintain identical voltage specifications but provide higher peak pulse current (23.9A–39.7A) and power dissipation (3000W–5000W). These parts are mechanically compatible in the DO-214AB package and electrically compatible for applications requiring enhanced transient suppression. All are active products with ROHS3 compliance.
Compliance Verification:
All substitute parts listed are ROHS3 compliant and carry EAR99 ECCN classification, matching the regulatory status of the original part. Moisture sensitivity level (MSL) is 1 (Unlimited) across all alternatives, ensuring consistent handling and storage requirements.
Frequently Asked Questions (FAQ)
Q: Can SMCJ78CA-TP directly replace CD214C-T78CALF?
A: Yes. SMCJ78CA-TP maintains identical electrical specifications (78V standoff, 126V clamp, 11.9A peak pulse, 1500W power) and is housed in the same DO-214AB (SMC) package. The part is active and ROHS3 compliant. The extended operating temperature range (-55°C to 175°C) provides additional thermal capability compared to the original specification (-55°C to 150°C).
Q: What is the difference between direct substitutes and similar substitutes?
A: Direct substitutes (SMCJ78CA series) maintain the original 11.4A–11.9A peak pulse current and 1500W power rating. Similar substitutes (SMDJ78CA, 5.0SMDJ78CA, 5.0SMLJ78CA-TP) provide higher peak pulse current (23.9A–39.7A) and power dissipation (3000W–5000W) while maintaining identical voltage parameters. Both categories are mechanically and electrically compatible; selection depends on transient protection requirements.
Q: Are all substitute parts available in the same package?
A: Yes. All substitute parts listed are housed in the DO-214AB (SMC) package, ensuring mechanical compatibility with existing PCB layouts and assembly processes.
Q: Do substitute parts meet the same compliance requirements?
A: Yes. All substitute parts are ROHS3 compliant with EAR99 ECCN classification, matching the regulatory status of CD214C-T78CALF. Moisture sensitivity level (MSL 1) is consistent across all alternatives.
Q: Which substitute offers the widest operating temperature range?
A: SMCJ78CA-TP and 5.0SMLJ78CA-TP both operate from -55°C to 175°C, providing the widest temperature margin. This is 25°C above the original specification upper limit of 150°C.
Q: Can I use a higher-power substitute (SMDJ78CA or 5.0SMDJ78CA) in place of the original part?
A: Yes. Higher-power substitutes maintain identical voltage specifications and package compatibility. They provide enhanced transient suppression capability and are suitable for applications requiring greater current handling or power dissipation. No circuit modifications are required.
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