CD214A-T51ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T51ALF is a Transient Voltage Suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection in surface-mount applications. This unidirectional Zener diode operates with a 51V reverse standoff voltage and provides 82.4V maximum clamping voltage at peak pulse current. The part is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214A-T51ALF

Bourns Inc.In Stock: 937CD214A-T51ALF Datasheet

Current PartRFQ

SMAJ51A

MDDIn Stock: 1672SMAJ51A Datasheet

DirectRFQ

SMAJ51A

MDDIn Stock: 1672SMAJ51A Datasheet

DirectRFQ

SMAJ51A-TP

Micro Commercial CoIn Stock: 35506SMAJ51A-TP Datasheet

SimilarRFQ

SMAJ54A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1222SMAJ54A-M3/5A Datasheet

SimilarRFQ

SMAJP4KE62A-TP

Micro Commercial CoIn Stock: 1190SMAJP4KE62A-TP Datasheet

SimilarRFQ

SZ1SMA58AT3G

LittelfuseIn Stock: 15212SZ1SMA58AT3G Datasheet

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TV04A510J-G

Comchip TechnologyIn Stock: 956TV04A510J-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD214A-T51ALF are classified based on electrical parameter compatibility within the TVS diode category. The primary substitution criteria are:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 51V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 82.4V ± tolerance
• Current - Peak Pulse (10/1000µs): 4.9A ± tolerance
• Power - Peak Pulse: 400W
• Package / Case: DO-214AC, SMA (surface mount)
• Mounting Type: Surface Mount
• Type: Zener, Unidirectional

Direct Equivalents maintain all critical electrical parameters within acceptable engineering tolerances and are manufactured by different suppliers with active product status.

Similar Substitutes share the same package and mounting type but exhibit variations in voltage ratings or peak pulse current within the same power class. These parts are suitable for applications where the specific voltage or current parameters can accommodate minor deviations.

Parameter Comparison

Engineering Selection Recommendations

Direct Equivalent Selection:

SMAJ51A-TP (Micro Commercial Co) and TV04A510J-G (Comchip Technology) are the primary direct equivalents for the CD214A-T51ALF. Both parts maintain identical reverse standoff voltage (51V), clamping voltage (82.4V), and peak pulse current (4.9A) specifications. SMAJ51A-TP offers an extended operating temperature range (-55°C ~ 175°C) compared to the original part, providing additional thermal margin. TV04A510J-G maintains the original temperature range (-55°C ~ 150°C) with marginally higher peak pulse current (4.85A). Both parts are ROHS3 compliant and carry active product status with established supply chains.

SMAJ51A (MDD) provides electrical equivalence but operates within a narrower temperature range (-50°C ~ 150°C), suitable for applications not requiring the full -55°C lower limit.

Similar Substitute Selection:

SMAJ54A-M3/5A (Vishay General Semiconductor) and SMAJP4KE62A-TP (Micro Commercial Co) are similar substitutes with higher voltage ratings. SMAJ54A-M3/5A operates at 54V reverse standoff with 87.1V clamping voltage, representing a 5.9% increase in clamping voltage. SMAJP4KE62A-TP operates at 53V reverse standoff with 85V clamping voltage, representing a 3.2% increase. These parts are suitable for applications where slightly elevated voltage protection is acceptable or beneficial.

SZ1SMA58AT3G (Littelfuse) represents the highest voltage variant at 58V reverse standoff with 93.6V clamping voltage. This part includes automotive-grade qualification (AEC-Q101) and extended lower temperature rating (-65°C), making it suitable for automotive and harsh-environment applications requiring enhanced voltage suppression.

All substitute parts maintain the DO-214AC (SMA) surface-mount package, ensuring mechanical and thermal compatibility with existing PCB designs.

Frequently Asked Questions (FAQ)

Q: Can SMAJ51A-TP be used as a direct replacement for CD214A-T51ALF?

A: Yes. SMAJ51A-TP is a direct electrical equivalent with identical voltage and current ratings (51V standoff, 82.4V clamping, 4.9A peak pulse). The part is ROHS3 compliant, carries active product status, and is available in the same DO-214AC (SMA) package. The extended operating temperature range (-55°C ~ 175°C) provides additional thermal margin compared to the original specification.

Q: What is the difference between direct equivalents and similar substitutes?

A: Direct equivalents maintain all critical electrical parameters (voltage standoff, clamping voltage, peak pulse current) within the same specifications as the original part. Similar substitutes share the same package and power rating but operate at different voltage levels. Similar substitutes are suitable when the application can tolerate voltage deviations or when higher voltage protection is desired.

Q: Is the SZ1SMA58AT3G suitable for non-automotive applications?

A: Yes. While SZ1SMA58AT3G carries automotive-grade qualification (AEC-Q101), it is suitable for any application requiring its electrical specifications. The higher voltage rating (58V standoff, 93.6V clamping) and extended lower temperature range (-65°C) make it appropriate for general-purpose and harsh-environment applications beyond automotive use.

Q: What are the key parameters to verify when selecting a substitute?

A: Verify reverse standoff voltage, maximum clamping voltage, peak pulse current, operating temperature range, and package type. For the CD214A-T51ALF, the critical parameters are 51V standoff, 82.4V clamping, and 4.9A peak pulse current in DO-214AC (SMA) package. Deviations in these parameters determine whether a part functions as a direct equivalent or similar substitute.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant, matching the environmental compliance status of the original CD214A-T51ALF. Moisture sensitivity level (MSL 1) is consistent across all parts, indicating unlimited shelf life under standard storage conditions.

Q: What is the difference between SMAJ51A and SMAJ51A-TP?

A: Both parts are electrically identical (51V standoff, 82.4V clamping, 4.9A peak pulse). The primary difference is operating temperature range: SMAJ51A operates -50°C ~ 150°C, while SMAJ51A-TP operates -55°C ~ 175°C. SMAJ51A-TP provides extended thermal capability at both temperature extremes, making it suitable for applications requiring the full -55°C lower limit or elevated temperature environments.