CD214C-T51ALF Equivalent & Substitute Parts

Part Overview

The CD214C-T51ALF 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 51V reverse standoff voltage, 82.4V maximum clamping voltage, and 18.2A peak pulse current capability in a DO-214AB (SMC) package. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	51	V
Voltage - Breakdown (Min)	56.7	V
Voltage - Clamping (Max) @ Ipp	82.4	V
Current - Peak Pulse (10/1000µs)	18.2	A
Power - Peak Pulse	1500	W
Package / Case	DO-214AB, SMC	—
Operating Temperature Range	-55 to 150	°C
Type	Zener	—
Unidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the CD214C-T51ALF are classified into two categories based on electrical and mechanical compatibility:

Direct Equivalents (Identical Electrical Performance) Parts meeting all critical electrical parameters: 51V reverse standoff voltage, 56.7V minimum breakdown voltage, 82.4V maximum clamping voltage, 18.2A peak pulse current, and 1500W peak pulse power. These parts maintain the same functional performance and are pin-compatible in DO-214AB (SMC) packages. Direct equivalents include SMCJ51A (MDD), SMCJ51A-HR (Littelfuse), SMCJ51A-HRA (Littelfuse), SMCJ51A-HRAT7 (Littelfuse), and SMCJ51A-TP (Micro Commercial Co).

Similar Parts (Higher Power Ratings) Parts sharing identical voltage parameters (51V standoff, 56.7V breakdown, 82.4V clamping) but with increased current and power handling: 5.0SMDJ51A (Taiwan Semiconductor Corporation) with 60.7A peak pulse current and 5000W power rating, 5.0SMDJ51A-T7 (Littelfuse) with 60.7A and 5000W, and SMDJ51A (Alpha & Omega Semiconductor) with 36.5A and 3000W. These parts are suitable for applications requiring higher transient energy dissipation while maintaining voltage regulation characteristics.

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown Min (V)	Voltage - Clamping Max (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Product Status	RoHS Status
CD214C-T51ALF	Bourns Inc.	51	56.7	82.4	18.2	1500	-55 to 150	Obsolete	ROHS3 Compliant
SMCJ51A	MDD	51	56.7	82.4	18.2	1500	-50 to 150	Active	ROHS3 Compliant
SMCJ51A-HR	Littelfuse Inc.	51	56.7	82.4	18.2	1500	-65 to 150	Active	ROHS3 Compliant
SMCJ51A-HRA	Littelfuse Inc.	51	56.7	82.4	18.2	1500	-65 to 150	Active	ROHS3 Compliant
SMCJ51A-HRAT7	Littelfuse Inc.	51	56.7	82.4	18.2	1500	-65 to 150	Active	ROHS3 Compliant
SMCJ51A-TP	Micro Commercial Co	51	56.7	82.4	18.2	1500	-55 to 175	Active	ROHS3 Compliant
5.0SMDJ51A	Taiwan Semiconductor Corporation	51	56.7	82.4	60.7	5000	-55 to 175	Active	ROHS3 Compliant
5.0SMDJ51A-T7	Littelfuse Inc.	51	56.7	82.4	60.7	5000	-65 to 150	Active	ROHS3 Compliant
SMDJ51A	Alpha & Omega Semiconductor Inc.	51	56.7	82.4	36.5	3000	-55 to 150	Active	ROHS3 Compliant

Engineering Selection Recommendations

For direct replacement of the obsolete CD214C-T51ALF, select from active-status direct equivalents: SMCJ51A (MDD), SMCJ51A-HR, SMCJ51A-HRA, SMCJ51A-HRAT7 (all Littelfuse), or SMCJ51A-TP (Micro Commercial Co). All maintain identical electrical specifications and DO-214AB package compatibility. All substitute options are ROHS3 compliant and carry REACH unaffected status, meeting current regulatory requirements.

For applications requiring enhanced transient energy handling beyond 1500W, higher-power alternatives are available: SMDJ51A (3000W, 36.5A) or 5.0SMDJ51A series (5000W, 60.7A). These maintain identical voltage regulation characteristics while providing increased current and power dissipation capacity. Selection depends on circuit transient energy requirements and thermal management capabilities.

Temperature range considerations: SMCJ51A-HR, SMCJ51A-HRA, and SMCJ51A-HRAT7 extend the lower operating limit to -65°C compared to the original -55°C specification. SMCJ51A-TP and higher-power variants extend the upper limit to 175°C. Verify application temperature requirements before selection.

Frequently Asked Questions (FAQ)

Q: Can SMCJ51A-TP directly replace CD214C-T51ALF? A: Yes. SMCJ51A-TP is a direct electrical equivalent with identical voltage parameters (51V standoff, 82.4V clamping), peak pulse current (18.2A), and power rating (1500W). Both use DO-214AB (SMC) packaging. The part is active-status and ROHS3 compliant.

Q: What is the difference between direct equivalents and higher-power alternatives? A: Direct equivalents (SMCJ51A series) maintain 18.2A peak pulse current and 1500W power rating, matching the original specification. Higher-power alternatives (SMDJ51A at 3000W, 5.0SMDJ51A at 5000W) increase current and power handling while preserving voltage regulation. Use higher-power parts only if circuit transient energy exceeds 1500W.

Q: Are all substitute parts ROHS3 compliant? A: Yes. All listed substitute parts carry ROHS3 compliance status, meeting current environmental and regulatory requirements.

Q: Does operating temperature range affect substitution? A: The original CD214C-T51ALF operates -55°C to 150°C. Most direct equivalents maintain this range or extend it. SMCJ51A-HR, SMCJ51A-HRA, and SMCJ51A-HRAT7 extend the lower limit to -65°C. SMCJ51A-TP and higher-power variants extend the upper limit to 175°C. Verify your application temperature requirements before selection.

Q: Can I use a higher-power TVS diode as a substitute? A: Yes, if your circuit design permits. SMDJ51A (3000W) and 5.0SMDJ51A (5000W) maintain identical voltage characteristics and DO-214AB packaging. Higher power ratings provide additional transient energy dissipation margin. Confirm PCB thermal design supports the higher power dissipation if used.

Q: What packaging considerations apply to these substitutes? A: All listed parts use DO-214AB (SMC) surface-mount packaging, maintaining footprint and land pattern compatibility with the original CD214C-T51ALF. No PCB layout modifications are required.

Q: Are there REACH compliance differences between substitutes? A: The original CD214C-T51ALF is REACH Affected. Most substitute parts are REACH Unaffected, providing regulatory advantage for new designs. Verify REACH status with your supplier for specific part lots.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message