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CD214B-T28CALF Equivalent & Substitute Parts
Part Overview
The CD214B-T28CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This bidirectional zener diode operates at a 28V reverse standoff voltage with a 45.4V maximum clamping voltage and 13.2A peak pulse current capability in the SMB (DO-214AA) package format. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and component procurement.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | CD214B-T28CALF |
| Manufacturer | Bourns Inc. |
| Category | Transient Voltage Suppressors (TVS) |
| Package / Case | DO-214AA, SMB |
| Voltage - Reverse Standoff (Typ) | 28V |
| Voltage - Breakdown (Min) | 31.1V |
| Voltage - Clamping (Max) @ Ipp | 45.4V |
| Current - Peak Pulse (10/1000µs) | 13.2A |
| Power - Peak Pulse | 600W |
| Operating Temperature | -55°C ~ 150°C (TJ) |
| Mounting Type | Surface Mount |
| Product Status | Obsolete |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level (MSL) | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution for the CD214B-T28CALF is determined by the following critical electrical and mechanical parameters:
Primary Substitution Criteria:
- Voltage - Reverse Standoff (Typ): 28V
- Voltage - Clamping (Max) @ Ipp: 45.4V
- Current - Peak Pulse (10/1000µs): 13.2A minimum
- Package / Case: DO-214AA, SMB
- Mounting Type: Surface Mount
- Bidirectional Channels: 1
Direct Equivalents maintain all primary electrical specifications within the same voltage class (28V standoff) and clamping voltage range (45.4V), with peak pulse current ratings of 13.2A or higher. These parts are functionally interchangeable without circuit redesign.
Similar Parts operate within adjacent voltage classes (24V, 26V, or 30V standoff) with proportionally adjusted clamping voltages and peak pulse currents. These parts are suitable for applications where the exact 28V specification is not critical, provided the circuit design accommodates the voltage variance.
Parameter Comparison
| Part Number | Manufacturer | Voltage - Reverse Standoff (Typ) | Voltage - Clamping (Max) @ Ipp | Current - Peak Pulse (10/1000µs) | Package / Case | Product Status | Operating Temperature | RoHS Status |
|---|---|---|---|---|---|---|---|---|
| CD214B-T28CALF | Bourns Inc. | 28V | 45.4V | 13.2A | DO-214AA, SMB | Obsolete | -55°C ~ 150°C | ROHS3 Compliant |
| SMBJ28CA | MDD | 28V | 45.4V | 13.3A | DO-214AA, SMB | Active | -50°C ~ 150°C | ROHS3 Compliant |
| SMBJ28CA-TP | Micro Commercial Co | 28V | 45.4V | 13.2A | DO-214AA, SMB | Active | -55°C ~ 175°C | ROHS3 Compliant |
| SMBJ28CA-TR | STMicroelectronics | 28V | 45.4V | 13.8A | DO-214AA, SMB | Active | -55°C ~ 150°C | ROHS3 Compliant |
| SMBJ26CA | EVVO Semi | 26V | 42.1V | 14.3A | DO-214AA, SMB | Active | -65°C ~ 150°C | ROHS3 Compliant |
| SMBJ24CA | MDD | 24V | 38.9V | 15.5A | DO-214AA, SMB | Active | -50°C ~ 150°C | ROHS3 Compliant |
| SMBJ30CA | MDD | 30V | 48.4V | 12.4A | DO-214AA, SMB | Active | -50°C ~ 150°C | ROHS3 Compliant |
| SMBJ30CA-HRA | Littelfuse | 30V | 48.4V | 12.4A | DO-214AA, SMB | Active | -65°C ~ 150°C | ROHS3 Compliant |
Engineering Selection Recommendations
Direct Substitutes (No Circuit Redesign Required):
SMBJ28CA (MDD), SMBJ28CA-TP (Micro Commercial Co), and SMBJ28CA-TR (STMicroelectronics) are direct functional equivalents to the CD214B-T28CALF. All three maintain the 28V reverse standoff voltage, 45.4V clamping voltage, and equivalent peak pulse current specifications. All are active products with ROHS3 compliance and MSL 1 rating. SMBJ28CA-TP offers extended upper operating temperature to 175°C compared to the standard 150°C maximum. SMBJ28CA-TR is supplied by STMicroelectronics with the TRANSIL™ series designation and offers 13.8A peak pulse current.
Similar Substitutes (Circuit Evaluation Required):
SMBJ26CA (EVVO Semi), SMBJ24CA (MDD), SMBJ30CA (MDD), and SMBJ30CA-HRA (Littelfuse) operate in adjacent voltage classes. SMBJ26CA provides a 26V standoff with 42.1V clamping, suitable for applications tolerating ±2V variance from the 28V specification. SMBJ24CA operates at 24V standoff with 38.9V clamping and higher peak pulse current (15.5A), appropriate for lower-voltage protection circuits. SMBJ30CA and SMBJ30CA-HRA both operate at 30V standoff with 48.4V clamping, suitable for applications requiring higher voltage protection margins. SMBJ30CA-HRA extends the lower operating temperature to -65°C.
All substitute parts are ROHS3 compliant, MSL 1 rated, and available in active production status.
Frequently Asked Questions (FAQ)
Q: Can SMBJ28CA directly replace CD214B-T28CALF without circuit modification?
A: Yes. SMBJ28CA maintains identical voltage specifications (28V standoff, 45.4V clamping) and equivalent peak pulse current (13.3A vs. 13.2A). Both are packaged in DO-214AA SMB format. The part is active and ROHS3 compliant.
Q: What is the difference between SMBJ28CA-TP and SMBJ28CA-TR?
A: Both are 28V standoff TVS diodes in SMB packaging with 45.4V clamping voltage. SMBJ28CA-TP (Micro Commercial Co) operates to 175°C maximum junction temperature, while SMBJ28CA-TR (STMicroelectronics) operates to 150°C. SMBJ28CA-TR offers slightly higher peak pulse current (13.8A vs. 13.2A).
Q: Can I use SMBJ30CA instead of CD214B-T28CALF?
A: SMBJ30CA operates at 30V standoff with 48.4V clamping voltage, compared to the 28V standoff and 45.4V clamping of the original part. This represents a 2V increase in both parameters. Substitution is possible only if the circuit design accommodates this higher voltage protection threshold. Peak pulse current is lower (12.4A vs. 13.2A).
Q: Are all substitute parts available in the same SMB package?
A: Yes. All listed substitute parts are packaged in DO-214AA SMB format, maintaining mechanical and thermal compatibility with the original CD214B-T28CALF footprint.
Q: What is the significance of the TRANSIL™ designation on SMBJ28CA-TR?
A: TRANSIL™ is the STMicroelectronics product series name for transient voltage suppressor diodes. It indicates the part meets STMicroelectronics specifications and quality standards. Electrical performance remains equivalent to other 28V standoff TVS diodes in the comparison.
Q: Do all substitute parts meet RoHS3 compliance?
A: Yes. All listed substitute parts carry ROHS3 Compliant status and MSL 1 (Unlimited) moisture sensitivity rating, matching the compliance profile of the original CD214B-T28CALF.
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