Request Quote
(Ships tomorrow)
CD214A-T20ALF Equivalent & Substitute Parts
Part Overview
The CD214A-T20ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc. in the DO-214AC (SMA) surface mount package. This component is designed for general-purpose transient voltage suppression applications with a 20V reverse standoff voltage and 32.4V maximum clamping voltage at peak pulse current. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CD214A-T20ALF |
| Manufacturer | Bourns Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Type | Zener |
| Unidirectional Channels | 1 |
| Voltage - Reverse Standoff (Typ) | 20V |
| Voltage - Breakdown (Min) | 22.2V |
| Voltage - Clamping (Max) @ Ipp | 32.4V |
| Current - Peak Pulse (10/1000µs) | 12.3A |
| Power - Peak Pulse | 400W |
| Operating Temperature Range | -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 of the CD214A-T20ALF is determined by the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Reverse standoff voltage: 20V (±0.5V tolerance acceptable)
- Breakdown voltage minimum: 22.2V (±0.6V tolerance acceptable)
- Maximum clamping voltage: 32.4V (±3.8V tolerance acceptable)
- Peak pulse current: 12.3A minimum (higher values acceptable)
- Peak pulse power: 400W minimum (higher values acceptable)
- Package: DO-214AC (SMA) surface mount
- Unidirectional configuration (single channel)
- Zener type diode
Substitute Classification:
Direct Equivalents meet all primary criteria with identical or superior electrical performance:
- SMAJ20A (MDD) - Identical electrical specifications, active product status
Similar Substitutes meet core voltage and package requirements with acceptable parameter variations:
- P4SMA24A-M3/5A and P4SMA24A-M3/61 (Vishay) - Voltage standoff 20.5V, clamping 33.2V, 12A peak pulse
- SM4T23AY (STMicroelectronics) - Voltage standoff 20V, clamping 42.8V, higher peak pulse current (54A)
- SMA6J19A-TP (Micro Commercial Co) - Voltage standoff 19V, clamping 30.8V, higher peak pulse current (19.5A)
- SMA6J20A-E3/5A and SMA6J20A-E3/61 (Vishay) - Voltage standoff 20V, clamping 36.8V, higher peak pulse current (93A)
- SMA6J20A-TP (Micro Commercial Co) - Voltage standoff 20V, clamping 32.4V, peak pulse current 18.5A
- SMA6J20A-TR (STMicroelectronics) - Voltage standoff 20V, clamping 36.8V, higher peak pulse current (93A)
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 | Product Status | Package |
|---|---|---|---|---|---|---|---|---|---|
| CD214A-T20ALF | Bourns Inc. | 20V | 22.2V | 32.4V | 12.3A | 400W | -55°C ~ 150°C | Obsolete | DO-214AC (SMA) |
| SMAJ20A | MDD | 20V | 22.2V | 32.4V | 12.3A | 400W | -50°C ~ 150°C | Active | DO-214AC (SMA) |
| P4SMA24A-M3/5A | Vishay | 20.5V | 22.8V | 33.2V | 12A | 400W | -65°C ~ 150°C | Active | DO-214AC (SMA) |
| P4SMA24A-M3/61 | Vishay | 20.5V | 22.8V | 33.2V | 12A | 400W | -65°C ~ 150°C | Active | DO-214AC (SMA) |
| SM4T23AY | STMicroelectronics | 20V | 22.2V | 42.8V | 54A (8/20µs) | 400W | -55°C ~ 150°C | Active | DO-214AC (SMA) |
| SMA6J19A-TP | Micro Commercial Co | 19V | 21.1V | 30.8V | 19.5A | 600W | -55°C ~ 175°C | Active | DO-214AC (SMA) |
| SMA6J20A-E3/5A | Vishay | 20V | 22.2V | 36.8V | 93A (8/20µs) | 4000W | -55°C ~ 150°C | Active | DO-214AC (SMA) |
| SMA6J20A-E3/61 | Vishay | 20V | 22.2V | 36.8V | 93A (8/20µs) | 4000W | -55°C ~ 150°C | Active | DO-214AC (SMA) |
| SMA6J20A-TP | Micro Commercial Co | 20V | 22.2V | 32.4V | 18.5A | 600W | -55°C ~ 175°C | Active | DO-214AC (SMA) |
| SMA6J20A-TR | STMicroelectronics | 20V | 22.2V | 36.8V | 93A (8/20µs) | 600W | -55°C ~ 175°C | Active | DO-214AC (SMA) |
Engineering Selection Recommendations
Primary Recommendation: SMAJ20A (MDD)
The SMAJ20A provides direct electrical equivalence to the CD214A-T20ALF with identical voltage standoff (20V), breakdown voltage (22.2V), clamping voltage (32.4V), and peak pulse current (12.3A) specifications. This part is in active production status, ensuring long-term availability and supply chain stability. The operating temperature range (-50°C ~ 150°C) is slightly narrower at the lower bound but remains suitable for most general-purpose applications. ROHS3 compliance and MSL 1 rating match the original part requirements.
Secondary Recommendations for Enhanced Performance:
SMA6J20A variants (Vishay E3/5A, E3/61, or STMicroelectronics TR) are suitable when higher peak pulse current capacity (93A) or increased power dissipation (4000W) is required. These parts maintain the 20V standoff voltage and 22.2V breakdown voltage while providing superior transient suppression capability. Operating temperature range extends to -55°C ~ 150°C or -55°C ~ 175°C depending on manufacturer.
SMA6J20A-TP (Micro Commercial Co) offers a balanced alternative with 20V standoff voltage, 32.4V clamping voltage, and extended operating temperature range (-55°C ~ 175°C). Peak pulse current is 18.5A, providing margin above the original 12.3A specification.
Compliance Considerations:
All recommended substitutes maintain ROHS3 compliance and MSL 1 rating. Vishay parts carry REACH Unaffected status, while Micro Commercial Co and STMicroelectronics parts carry REACH Unaffected or are REACH Affected. Verify REACH compliance requirements for your specific application and supply chain.
Frequently Asked Questions (FAQ)
Q: Can SMAJ20A directly replace CD214A-T20ALF without circuit modification?
A: Yes. SMAJ20A provides identical electrical specifications across all critical parameters: 20V reverse standoff voltage, 22.2V breakdown voltage, 32.4V clamping voltage, and 12.3A peak pulse current. Both are unidirectional Zener TVS diodes in DO-214AC (SMA) packages. No circuit redesign is required.
Q: What is the difference between "Direct Equivalent" and "Similar Substitute" parts?
A: Direct equivalents (SMAJ20A) match all primary electrical specifications of the original part. Similar substitutes meet core voltage and package requirements but may have variations in peak pulse current, clamping voltage, or power dissipation. Similar substitutes are acceptable when the application can tolerate these parameter variations.
Q: Why do some substitute parts have higher peak pulse current ratings (54A, 93A)?
A: Higher peak pulse current ratings indicate greater transient suppression capability. These parts will clamp transient voltages more effectively in high-energy surge environments. They are backward-compatible with applications designed for lower current ratings (12.3A) and provide additional design margin.
Q: Are there temperature range differences between the original and substitute parts?
A: Yes. The original CD214A-T20ALF operates from -55°C ~ 150°C. SMAJ20A operates from -50°C ~ 150°C (slightly narrower at low temperature). SMA6J variants extend to -55°C ~ 175°C. Verify your application's temperature requirements before selection.
Q: What does "Product Status: Obsolete" mean for the original part?
A: Obsolete status indicates the CD214A-T20ALF is no longer manufactured by Bourns Inc. Existing inventory may be available from distributors, but long-term supply cannot be guaranteed. Substitution to active-status parts (SMAJ20A, SMA6J variants) ensures continued availability for future production and redesigns.
Q: Can I use SMA6J20A-E3/5A if my circuit only requires 12.3A peak pulse current?
A: Yes. The SMA6J20A-E3/5A is rated for 93A peak pulse current, which exceeds the 12.3A requirement. Higher current ratings provide additional design margin and do not negatively impact circuits designed for lower current levels. The 20V standoff and 22.2V breakdown voltages remain identical to the original part.
Q: What is the significance of different packaging codes (E3/5A, E3/61, TR, TP)?
A: Packaging codes indicate tape and reel configuration, quantity per reel, or bulk packaging. E3/5A and E3/61 refer to Vishay's tape and reel formats. TR indicates Cut Tape & Digi-Reel packaging. TP indicates bulk packaging. All variants use the same DO-214AC (SMA) component package and are electrically identical within their respective part families.
Q: Are all substitute parts ROHS3 compliant?
A: Most recommended substitutes are ROHS3 compliant. Verify specific part datasheets for ROHS certification status, particularly for Micro Commercial Co parts where compliance information may vary by production lot.
Alternative Parts
SJ6012L2TP
Littelfuse Inc.
6 Alternative Parts
JMK107BBJ476MA-RE
Taiyo Yuden
10 Alternative Parts
GMK107BBJ475MA-T
Taiyo Yuden
5 Alternative Parts
SJ6020N2ARP
Littelfuse Inc.
3 Alternative Parts
SJ6025R2ATP
Littelfuse Inc.
4 Alternative Parts
2474-05L
API Delevan Inc.
1 Alternative Parts
4590R-684K
API Delevan Inc.
1 Alternative Parts
CM6560R-334
API Delevan Inc.
1 Alternative Parts
CM6460-104
API Delevan Inc.
1 Alternative Parts
5526-12
API Delevan Inc.
1 Alternative Parts