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CD214B-T26ALF Equivalent & Substitute Parts
Part Overview
The CD214B-T26ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 26V reverse standoff voltage with a 42.1V maximum clamping voltage and 14.2A peak pulse current capability in the DO-214AA (SMB) package. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and production requirements.
Substiute Parts
Key Parameters
| Parameter | Value | Unit |
|---|---|---|
| Voltage - Reverse Standoff (Typ) | 26 | V |
| Voltage - Breakdown (Min) | 28.9 | V |
| Voltage - Clamping (Max) @ Ipp | 42.1 | V |
| Current - Peak Pulse (10/1000µs) | 14.2 | A |
| Power - Peak Pulse | 600 | W |
| Package / Case | DO-214AA, SMB | — |
| Operating Temperature Range | -55 to 150 | °C (TJ) |
| Type | Zener | — |
| Unidirectional Channels | 1 | — |
| RoHS Status | ROHS3 Compliant | — |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) | — |
Substitute Part Grouping Explanation
Substitution for the CD214B-T26ALF is determined by strict electrical and mechanical compatibility criteria:
Primary Substitution Criteria:
- Voltage - Reverse Standoff (Typ): 26V
- Voltage - Clamping (Max) @ Ipp: 42.1V
- Current - Peak Pulse (10/1000µs): ≥14.2A
- Package / Case: DO-214AA (SMB) or compatible surface-mount package
- Power - Peak Pulse: 600W
- Type: Zener, Unidirectional
Substitute Categories:
Direct Electrical Match (26V Standoff, 42.1V Clamp): Parts meeting all primary electrical parameters with identical or superior current handling and package compatibility.
Similar Electrical Match (Adjacent Voltage Ratings): Parts with standoff voltages within the 25.6V–30V range and clamping voltages between 41.4V–48.4V, suitable for applications with tolerance for minor voltage variations.
Parameter Comparison
| Part Number | Manufacturer | Standoff Voltage (V) | Breakdown Min (V) | Clamp Voltage (V) | Peak Pulse Current (A) | Package | Product Status | Temp Range (°C) |
|---|---|---|---|---|---|---|---|---|
| CD214B-T26ALF | Bourns Inc. | 26 | 28.9 | 42.1 | 14.2 | DO-214AA, SMB | Obsolete | -55 to 150 |
| SMBJ26A | EVVO Semi | 26 | 28.9 | 42.1 | 14.3 | DO-214AC, SMA | Active | -65 to 150 |
| SMBJ26A-TR | STMicroelectronics | 26 | 28.9 | 42.1 | 14.9 | DO-214AA, SMB | Active | -55 to 150 |
| SMBJ28A-HRA | Littelfuse Inc. | 28 | 31.1 | 45.4 | 13.3 | DO-214AA, SMB | Active | -65 to 150 |
| SMBJ30A-HRA | Littelfuse Inc. | 30 | 33.3 | 48.4 | 12.4 | DO-214AA, SMB | Active | -65 to 150 |
| SMBJ30A-M3/52 | Vishay General Semiconductor | 30 | 33.3 | 48.4 | 12.4 | DO-214AA, SMB | Active | -55 to 150 |
| TPSMB30A | Littelfuse Inc. | 25.6 | 28.5 | 41.4 | 14.7 | DO-214AA, SMB | Active | -65 to 175 |
| TV06B260J-G | Comchip Technology | 26 | 28.9 | 42.1 | 14.25 | DO-214AA, SMB | Active | — |
Engineering Selection Recommendations
Recommended Direct Substitutes (Identical Electrical Performance):
SMBJ26A-TR (STMicroelectronics) and TV06B260J-G (Comchip Technology) provide direct electrical equivalence with 26V standoff and 42.1V clamping voltages. Both are active products with ROHS3 compliance and MSL 1 rating. SMBJ26A-TR offers superior peak pulse current (14.9A) and maintains the DO-214AA (SMB) package footprint. TV06B260J-G provides equivalent performance with 14.25A peak pulse current.
SMBJ26A (EVVO Semi) matches electrical specifications with 14.3A peak pulse current and extended lower temperature range (-65°C). Package compatibility requires verification: SMBJ26A uses DO-214AC (SMA) versus the original DO-214AA (SMB) footprint.
Alternative Substitutes (Adjacent Voltage Ratings):
TPSMB30A (Littelfuse Inc.) operates at 25.6V standoff with 41.4V clamping and 14.7A peak pulse current, suitable for applications tolerating minor voltage variations. This part includes automotive-grade qualification (AEC-Q101) and extended temperature range to 175°C.
SMBJ28A-HRA and SMBJ30A variants (Littelfuse Inc., Vishay) represent higher voltage alternatives for circuits requiring additional margin. These parts maintain 600W peak pulse power and ROHS3 compliance but operate at 28V and 30V standoff voltages respectively, with correspondingly higher clamping voltages (45.4V and 48.4V).
Compliance & Certification:
All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating. STMicroelectronics SMBJ26A-TR and Littelfuse TPSMB30A are qualified for automotive applications. Selection should prioritize active product status and established manufacturer support for production continuity.
Frequently Asked Questions (FAQ)
Q: Can SMBJ26A (EVVO Semi) replace CD214B-T26ALF directly?
A: SMBJ26A provides identical electrical specifications (26V standoff, 42.1V clamp, 14.3A peak pulse). However, the package differs: SMBJ26A uses DO-214AC (SMA) while the original uses DO-214AA (SMB). PCB footprint compatibility must be verified before selection. If footprint compatibility is required, SMBJ26A-TR (STMicroelectronics) maintains the DO-214AA (SMB) package.
Q: What is the difference between DO-214AA (SMB) and DO-214AC (SMA) packages?
A: Both are surface-mount packages for TVS diodes with different physical dimensions. DO-214AA (SMB) and DO-214AC (SMA) have distinct footprints and cannot be used interchangeably without PCB redesign. Verify your PCB layout requirements before selecting a substitute.
Q: Can I use SMBJ28A-HRA or SMBJ30A-HRA as substitutes?
A: These parts are functionally compatible but operate at higher voltage ratings (28V and 30V standoff respectively). They are suitable only if your circuit design tolerates higher clamping voltages (45.4V and 48.4V). Use these alternatives only when the application permits voltage margin increase.
Q: Is TPSMB30A suitable for my application?
A: TPSMB30A operates at 25.6V standoff with 41.4V clamping, providing electrical performance close to the original. This part includes automotive-grade qualification and extended temperature range to 175°C. It is suitable if your circuit tolerates the slightly lower standoff voltage and higher peak pulse current (14.7A).
Q: Are all substitute parts ROHS3 compliant?
A: Yes. All recommended substitutes maintain ROHS3 compliance and MSL 1 (unlimited) moisture sensitivity rating, matching the original CD214B-T26ALF specifications.
Q: Which substitute offers the best availability?
A: SMBJ26A (EVVO Semi) shows the highest inventory (39,700 pcs). SMBJ30A-M3/52 (Vishay) provides 8,386 pcs in stock. Both are active products with established supply chains.
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