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CD214A-T11ALF Equivalent & Substitute Parts
Part Overview
The CD214A-T11ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., rated for 11V reverse standoff voltage with an 18.2V maximum clamping voltage. Designed for general-purpose overvoltage protection in surface-mount applications, this component operates across the -55°C to 150°C temperature range in a DO-214AC (SMA) package. The part is currently obsolete, making equivalent and substitute components necessary for ongoing design support and production requirements.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CD214A-T11ALF |
| Manufacturer | Bourns Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 11V |
| Voltage - Breakdown (Min) | 12.2V |
| Voltage - Clamping (Max) @ Ipp | 18.2V |
| Current - Peak Pulse (10/1000µs) | 22A |
| Power - Peak Pulse | 400W |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Package / Case | DO-214AC, SMA |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
| Product Status | Obsolete |
Substitute Part Grouping Explanation
Substitution eligibility for the CD214A-T11ALF is determined by the following critical parameters:
- Reverse Standoff Voltage (Typ): 11V ± tolerance
- Clamping Voltage (Max) @ Ipp: 18.2V ± tolerance
- Peak Pulse Current (10/1000µs): 22A minimum
- Power - Peak Pulse: 400W minimum
- Package / Case: DO-214AC (SMA) surface mount
- Operating Temperature Range: -55°C to 150°C minimum
- Unidirectional Configuration: Single channel Zener type
Substitute parts are classified into two categories:
Direct Equivalents: Parts with identical electrical specifications (11V standoff, 18.2V clamp, 22A peak pulse current, 400W power rating) and matching package configuration.
Similar Alternatives: Parts with comparable voltage ratings and clamping characteristics within acceptable engineering tolerances, maintaining the same package type and thermal operating range, but with variations in peak pulse current or clamping voltage that remain functionally compatible for general-purpose overvoltage protection applications.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Breakdown (Min) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Power - Peak Pulse | Operating Temperature | Package / Case | Product Status | RoHS Status |
|---|---|---|---|---|---|---|---|---|---|---|
| CD214A-T11ALF | Bourns Inc. | 11V | 12.2V | 18.2V | 22A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Obsolete | ROHS3 Compliant |
| SMAJ11A | Meritek | 11V | 12.2V | 18.2V | 21.98A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
| P4SMA13A | Eaton - Electronics Division | 11.1V | 12.4V | 18.2V | 22.5A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Active | RoHS Compliant |
| SMA6J10A-TP | Micro Commercial Co | 10V | 11.1V | 17V | 35.3A | 600W | -55°C ~ 175°C | DO-214AC (SMA) | Active | Not specified |
| SMA6J11A-E3/5A | Vishay General Semiconductor - Diodes Division | 11V | 12.2V | 21.5V | 172A (8/20µs) | 4000W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
| SMA6J11A-E3/61 | Vishay General Semiconductor - Diodes Division | 11V | 12.2V | 21.5V | 172A (8/20µs) | 4000W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
| SMA6J11A-TP | Micro Commercial Co | 11V | 12.2V | 18.2V | 33A | 600W | -55°C ~ 175°C | DO-214AC (SMA) | Active | Not specified |
| SMAJ10A-M3/5A | Vishay General Semiconductor - Diodes Division | 10V | 11.1V | 17V | 24.6A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
| SMAJ10A-M3/61 | Vishay General Semiconductor - Diodes Division | 10V | 11.1V | 17V | 24.6A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
| SMAJ11A-M3/5A | Vishay General Semiconductor - Diodes Division | 11V | 12.2V | 18.2V | 22A | 400W | -55°C ~ 150°C | DO-214AC (SMA) | Active | ROHS3 Compliant |
Engineering Selection Recommendations
Primary Substitute (Direct Equivalent):
SMAJ11A-M3/5A (Vishay General Semiconductor - Diodes Division) provides the closest electrical and mechanical match to the CD214A-T11ALF. This part maintains identical reverse standoff voltage (11V), breakdown voltage (12.2V), clamping voltage (18.2V), and peak pulse current (22A) specifications. The component is active in production status, ROHS3 compliant, and operates within the required -55°C to 150°C temperature range in the DO-214AC (SMA) package.
Secondary Substitute (Direct Equivalent):
SMAJ11A (Meritek) offers equivalent electrical performance with 11V standoff, 12.2V breakdown, 18.2V clamping, and 21.98A peak pulse current. This part is active in production, ROHS3 compliant, and maintains the same package configuration and thermal operating range.
Alternative Substitute (Similar Characteristics):
SMA6J11A-TP (Micro Commercial Co) provides matching 11V standoff and 18.2V clamping voltage with enhanced peak pulse current capability (33A) and power rating (600W). This part is active in production and operates across an extended temperature range (-55°C to 175°C), offering improved thermal performance while maintaining package compatibility.
Lower Voltage Alternative:
SMAJ10A-M3/5A and SMAJ10A-M3/61 (Vishay General Semiconductor - Diodes Division) are suitable for applications where a 10V standoff voltage is acceptable. These parts provide 17V clamping voltage, 24.6A peak pulse current, and 400W power rating, maintaining the same package and thermal specifications as the original component.
Frequently Asked Questions (FAQ)
Q: Can SMAJ11A-M3/5A be used as a direct replacement for CD214A-T11ALF?
A: Yes. SMAJ11A-M3/5A is a direct equivalent with identical reverse standoff voltage (11V), breakdown voltage (12.2V), clamping voltage (18.2V), and peak pulse current (22A). Both components are rated for 400W peak pulse power, operate across -55°C to 150°C, and use the DO-214AC (SMA) package. The part is active in production and ROHS3 compliant.
Q: What is the difference between SMAJ11A and SMAJ11A-M3/5A?
A: Both parts share identical electrical specifications (11V standoff, 18.2V clamp, 22A peak pulse current, 400W power). The designation suffix indicates different packaging or tape reel configurations from different manufacturers. Both are functionally equivalent for the CD214A-T11ALF application.
Q: Can SMA6J11A-E3/5A replace the CD214A-T11ALF?
A: SMA6J11A-E3/5A maintains the same 11V standoff and 12.2V breakdown voltage as the original part. However, it features a higher clamping voltage (21.5V versus 18.2V) and significantly higher peak pulse current (172A versus 22A) with 4000W power rating. This part is suitable for applications requiring enhanced transient protection but may not be necessary for designs optimized for the original 18.2V clamping specification.
Q: Are there packaging differences between substitute parts?
A: All listed substitute parts use the DO-214AC (SMA) surface-mount package, maintaining mechanical and thermal interface compatibility with the original CD214A-T11ALF. Packaging variations (Tape & Reel versus Bulk) affect supply and handling but do not impact electrical performance or board-level integration.
Q: What is the significance of the operating temperature range differences?
A: The CD214A-T11ALF operates from -55°C to 150°C. Substitute parts such as SMA6J10A-TP and SMA6J11A-TP extend this range to -55°C to 175°C, providing additional thermal margin. For applications operating within the original -55°C to 150°C specification, this extended range offers no functional advantage but may provide design flexibility for future thermal requirements.
Q: Can lower voltage alternatives like SMAJ10A-M3/5A be used?
A: SMAJ10A-M3/5A operates at 10V standoff voltage versus the original 11V specification. This part is suitable only for applications where the lower standoff voltage is acceptable. The 17V clamping voltage and 24.6A peak pulse current remain compatible with general-purpose overvoltage protection requirements. Circuit-level validation is required to confirm compatibility with the specific application voltage thresholds.
Q: What compliance certifications should be verified for substitute parts?
A: The original CD214A-T11ALF is ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity. Recommended substitutes (SMAJ11A-M3/5A, SMAJ11A) maintain ROHS3 compliance. Alternative substitutes such as SMA6J10A-TP and SMA6J11A-TP may have different compliance designations; verify ROHS and REACH status against your procurement and regulatory requirements before final selection.
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