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CD214L-T75ALF Equivalent & Substitute Parts
Part Overview
The CD214L-T75ALF is a unidirectional Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 75V reverse standoff voltage with a 121V maximum clamping voltage and 24.8A peak pulse current capability. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer | Bourns Inc. |
| Part Number | CD214L-T75ALF |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener, Unidirectional |
| Voltage - Reverse Standoff (Typ) | 75V |
| Voltage - Breakdown (Min) | 83.3V |
| Voltage - Clamping (Max) @ Ipp | 121V |
| Current - Peak Pulse (10/1000µs) | 24.8A |
| Power - Peak Pulse | 3000W (3kW) |
| Package / Case | DO-214AB, SMC |
| Mounting Type | Surface Mount |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
Substitute Part Grouping Explanation
Substitution of the CD214L-T75ALF is determined by strict equivalence across the following critical parameters:
- Voltage - Reverse Standoff (Typ): 75V
- Voltage - Clamping (Max) @ Ipp: 121V
- Package / Case: DO-214AB, SMC
- Mounting Type: Surface Mount
- Unidirectional Channels: 1
Substitute parts are grouped into two categories:
Direct Equivalents maintain identical electrical specifications and peak pulse current ratings (24.8A, 3000W). These parts are pin-compatible and functionally interchangeable without circuit modification.
Similar Equivalents maintain the same voltage specifications and package but differ in peak pulse current capability (12.4A to 41.4A) and power dissipation (1500W to 5000W). Selection depends on circuit current requirements and thermal design constraints.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Package / Case | Operating Temperature | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|
| CD214L-T75ALF | Bourns Inc. | 75V | 121V | 24.8A | 3000W | DO-214AB, SMC | -55°C ~ 150°C | Obsolete | ROHS3 Compliant |
| SMLJ75A | Bourns Inc. | 75V | 121V | 24.8A | 3000W | DO-214AB, SMC | -55°C ~ 150°C | Active | ROHS3 Compliant |
| 5.0SMDJ75A | Taiwan Semiconductor Corporation | 75V | 121V | 41.4A | 5000W | DO-214AB, SMC | -55°C ~ 175°C | Active | ROHS3 Compliant |
| 5.0SMDJ75A-T7 | Littelfuse Inc. | 75V | 121V | 41.4A | 5000W | DO-214AB, SMC | -65°C ~ 150°C | Active | ROHS3 Compliant |
| SMCJ75A | Meritek | 75V | 121V | 12.4A | 1500W | DO-214AB, SMC | -55°C ~ 150°C | Active | ROHS3 Compliant |
| SMDJ75A | Alpha & Omega Semiconductor Inc. | 75V | 121V | 24.8A | 3000W | DO-214AB, SMC | -55°C ~ 150°C | Active | ROHS3 Compliant |
| TPSMC75A | Littelfuse | 64.1V | 103V | 14.8A | 1500W | DO-214AB, SMC | -55°C ~ 150°C | Active | ROHS3 Compliant |
| TPSMC82A | Littelfuse Inc. | 70.1V | 113V | 14.6A | 1500W | DO-214AB, SMC | -55°C ~ 150°C | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Recommendation: SMLJ75A (Bourns Inc.)
The SMLJ75A is the direct functional equivalent of the CD214L-T75ALF, maintaining identical electrical specifications (75V standoff, 121V clamping, 24.8A peak pulse, 3000W power dissipation) and package configuration. This part is manufactured by the same supplier as the original component and carries active product status with ROHS3 compliance. Selection of SMLJ75A requires no circuit redesign and provides the highest compatibility assurance.
Secondary Recommendation: SMDJ75A (Alpha & Omega Semiconductor Inc.)
The SMDJ75A matches the CD214L-T75ALF across all critical electrical parameters and package specifications. This part is actively manufactured and ROHS3 compliant, providing a qualified alternative from a different manufacturer. Circuit performance remains equivalent to the original design.
Higher Power Alternative: 5.0SMDJ75A or 5.0SMDJ75A-T7
Both the Taiwan Semiconductor Corporation 5.0SMDJ75A and Littelfuse 5.0SMDJ75A-T7 maintain the same voltage specifications and package but provide enhanced current handling (41.4A peak pulse) and power dissipation (5000W). These parts are suitable for applications requiring higher transient energy absorption. The 5.0SMDJ75A-T7 offers extended low-temperature operation (-65°C minimum) compared to the original specification.
Lower Power Alternative: SMCJ75A (Meritek)
The SMCJ75A maintains voltage equivalence but operates at reduced peak pulse current (12.4A) and power dissipation (1500W). This part is appropriate only for applications with lower transient current requirements than the original design.
Not Recommended: TPSMC75A and TPSMC82A
The TPSMC75A and TPSMC82A exhibit voltage deviations from the original specification (64.1V and 70.1V standoff respectively, with 103V and 113V clamping voltages). These parts do not meet the electrical requirements of the CD214L-T75ALF and are unsuitable for direct substitution.
Frequently Asked Questions (FAQ)
Q: Can SMLJ75A be used as a direct replacement for CD214L-T75ALF?
A: Yes. The SMLJ75A is electrically and mechanically equivalent to the CD214L-T75ALF. Both parts share identical voltage ratings (75V standoff, 121V clamping), current specifications (24.8A peak pulse), power dissipation (3000W), and DO-214AB SMC package configuration. No circuit modifications are required.
Q: What is the difference between the direct equivalents and similar equivalents?
A: Direct equivalents (SMLJ75A, SMDJ75A) maintain identical peak pulse current (24.8A) and power dissipation (3000W) specifications. Similar equivalents differ in current handling capability: SMCJ75A provides 12.4A at 1500W, while 5.0SMDJ75A and 5.0SMDJ75A-T7 provide 41.4A at 5000W. Selection depends on the actual transient current levels in your circuit.
Q: Why are TPSMC75A and TPSMC82A listed but not recommended?
A: TPSMC75A and TPSMC82A have different voltage specifications than the CD214L-T75ALF. TPSMC75A operates at 64.1V standoff with 103V clamping, and TPSMC82A operates at 70.1V standoff with 113V clamping. These voltage deviations make them unsuitable for circuits designed around the 75V/121V specifications of the original part.
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification, matching the environmental compliance status of the CD214L-T75ALF.
Q: What is the operating temperature range for each substitute?
A: Most substitutes operate across -55°C to 150°C, matching the original specification. The 5.0SMDJ75A extends the upper limit to 175°C, while the 5.0SMDJ75A-T7 extends the lower limit to -65°C. Verify temperature requirements against your application specifications before selection.
Q: Can I use a higher power-rated part like 5.0SMDJ75A in place of the CD214L-T75ALF?
A: Yes, if your circuit board layout and thermal design accommodate the part. Higher power-rated parts provide additional transient energy absorption capability without affecting normal circuit operation. Verify PCB footprint compatibility and thermal management requirements.
Q: Is packaging identical across all substitute parts?
A: Yes. All substitute parts use the DO-214AB SMC surface-mount package, ensuring mechanical and electrical compatibility with existing PCB designs for the CD214L-T75ALF.
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