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CD214B-T12CALF Equivalent & Substitute Parts
Part Overview
The CD214B-T12CALF is a transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface mount applications. This component features a 12V reverse standoff voltage with 19.9V maximum clamping voltage and 30.2A peak pulse current capability in the SMB (DO-214AA) package. The part is classified as obsolete, necessitating identification of active equivalent alternatives that maintain identical electrical and mechanical specifications for continued circuit protection functionality.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Reverse Standoff Voltage (Typ) | 12V |
| Breakdown Voltage (Min) | 13.3V |
| Clamping Voltage (Max) @ Ipp | 19.9V |
| Peak Pulse Current (10/1000µs) | 30.2A |
| Peak Pulse Power | 600W |
| Package / Case | DO-214AA, SMB |
| Mounting Type | Surface Mount |
| Operating Temperature Range | -55°C ~ 150°C (TJ) |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
Substitute Part Grouping Explanation
Substitution eligibility for the CD214B-T12CALF is determined by strict equivalence across the following critical parameters:
- Reverse Standoff Voltage: 12V (Typ)
- Breakdown Voltage: 13.3V (Min)
- Clamping Voltage: 19.9V (Max) @ Ipp
- Peak Pulse Current: 30.2A nominal (±tolerance acceptable)
- Package: DO-214AA / SMB form factor
- Mounting: Surface Mount
- RoHS3 Compliance
- MSL Rating: 1 (Unlimited)
Parts are classified as direct equivalents when all electrical parameters match within specified tolerances and packaging is identical. Parts with voltage or current deviations are classified as similar alternatives and require circuit validation before substitution.
Parameter Comparison
| Part Number | Manufacturer | Status | Standoff (V) | Breakdown (V) | Clamp (V) | Ipp (A) | Temp Range (°C) | Package |
|---|---|---|---|---|---|---|---|---|
| CD214B-T12CALF | Bourns Inc. | Obsolete | 12 | 13.3 | 19.9 | 30.2 | -55 ~ 150 | DO-214AA, SMB |
| SMBJ12CA | EVVO Semi | Active | 12 | 13.3 | 19.9 | 30.2 | -65 ~ 150 | DO-214AA, SMB |
| SMBJ12CA-TP | Micro Commercial Co | Active | 12 | 13.3 | 19.9 | 30.2 | -55 ~ 175 | DO-214AA, SMB |
| SMBJ12CA-TR | STMicroelectronics | Active | 12 | 13.3 | 19.9 | 31 | -55 ~ 150 | DO-214AA, SMB |
| SMBJ14CA | MDD | Active | 14 | 15.6 | 23.2 | 25.9 | -50 ~ 150 | DO-214AA, SMB |
| TV06B120JB-HF | Comchip Technology | Active | 12 | 13.3 | 19.9 | 30.15 | Not specified | DO-214AA, SMB |
Engineering Selection Recommendations
Direct Equivalents (Recommended for 1:1 Replacement):
SMBJ12CA (EVVO Semi), SMBJ12CA-TP (Micro Commercial Co), SMBJ12CA-TR (STMicroelectronics), and TV06B120JB-HF (Comchip Technology) maintain electrical parameter equivalence to the CD214B-T12CALF. All substitute parts are ROHS3 compliant with MSL 1 rating. Selection among these direct equivalents should prioritize active product status and availability. SMBJ12CA from EVVO Semi offers the widest operating temperature range (-65°C to 150°C) and highest inventory availability (112,045 units). SMBJ12CA-TP from Micro Commercial Co extends the upper temperature limit to 175°C, suitable for elevated thermal environments.
Similar Alternative (Conditional Use):
SMBJ14CA (MDD) deviates from the original specification with 14V standoff voltage, 23.2V clamping voltage, and 25.9A peak pulse current. This part is not suitable as a direct replacement and requires circuit re-evaluation to confirm compatibility with the higher voltage thresholds.
Frequently Asked Questions (FAQ)
Q: Can SMBJ12CA directly replace CD214B-T12CALF?
A: Yes. SMBJ12CA from EVVO Semi matches all critical electrical parameters (12V standoff, 13.3V breakdown, 19.9V clamp, 30.2A Ipp) and package specification (DO-214AA, SMB). Both are ROHS3 compliant with MSL 1 rating. The substitute is active and widely available.
Q: What is the difference between SMBJ12CA-TP and SMBJ12CA-TR?
A: Both maintain identical electrical specifications. SMBJ12CA-TP (Micro Commercial Co) operates to 175°C maximum junction temperature and is supplied in Tape & Reel packaging. SMBJ12CA-TR (STMicroelectronics) operates to 150°C and is supplied in Cut Tape & Digi-Reel format. Selection depends on thermal requirements and packaging preference.
Q: Why is SMBJ14CA listed as a similar alternative rather than a direct equivalent?
A: SMBJ14CA has a 14V standoff voltage compared to the 12V specification of CD214B-T12CALF. The clamping voltage is 23.2V versus 19.9V, and peak pulse current is 25.9A versus 30.2A. These deviations require circuit validation to ensure the higher voltage thresholds do not compromise protection or introduce unintended behavior.
Q: Are all substitute parts RoHS3 compliant?
A: Yes. All listed substitute parts carry ROHS3 compliance certification and MSL 1 (Unlimited) moisture sensitivity rating, matching the original CD214B-T12CALF specification.
Q: What packaging options are available for direct equivalents?
A: Direct equivalents are supplied in Cut Tape (CT) & Digi-Reel or Tape & Reel (TR) formats. All maintain the DO-214AA / SMB physical form factor for direct PCB footprint compatibility.
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