CD214A-T170ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T170ALF 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 170V reverse standoff voltage with 275V maximum clamping voltage and 1.4A peak pulse current capability in a DO-214AC (SMA) package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

CD214A-T170ALF

Bourns Inc.In Stock: 1169CD214A-T170ALF Datasheet

Current PartRFQ

SMAJ170A

MDDIn Stock: 45444SMAJ170A Datasheet

DirectRFQ

SMAJ170A

MDDIn Stock: 45444SMAJ170A Datasheet

DirectRFQ

SMAJ170A-TR

STMicroelectronicsIn Stock: 25125SMAJ170A-TR Datasheet

SimilarRFQ

SMAJ188A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 1073SMAJ188A-M3/61 Datasheet

SimilarRFQ

SMAJP4KE220A-TP

Micro Commercial CoIn Stock: 784SMAJP4KE220A-TP Datasheet

SimilarRFQ

TV04A171J-G

Comchip TechnologyIn Stock: 1150TV04A171J-G Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD214A-T170ALF are classified based on electrical parameter compatibility within the following criteria:

Critical Parameters for Substitution:

• Voltage - Reverse Standoff (Typ): 170V ± tolerance
• Voltage - Clamping (Max) @ Ipp: 275V ± tolerance
• Package / Case: DO-214AC (SMA)
• Unidirectional Channels: 1
• Type: Zener

Direct Equivalents maintain identical or near-identical electrical specifications across all critical parameters and are sourced from active product lines.

Similar Substitutes share the same reverse standoff voltage and package but may vary in clamping voltage, peak pulse current, or power dissipation within acceptable operational ranges for general-purpose protection applications.

Parameter Comparison

Engineering Selection Recommendations

SMAJ170A (MDD) and TV04A171J-G (Comchip Technology) are the primary substitutes for CD214A-T170ALF. Both parts maintain the 170V reverse standoff voltage, 275V clamping voltage, and 400W peak pulse power rating. SMAJ170A provides slightly higher peak pulse current (1.50A vs. 1.4A) with active product status and ROHS3 compliance. TV04A171J-G matches the original operating temperature range (-55°C ~ 150°C) and clamping voltage specification with 1.45A peak pulse current, also ROHS3 compliant and active.

SMAJ170A-TR (STMicroelectronics) is suitable where higher transient current handling is required. This part maintains the 170V reverse standoff voltage but features elevated clamping voltage (353V) and significantly higher peak pulse current (6.5A at 8/20µs), making it appropriate for applications requiring enhanced surge protection margins.

SMAJP4KE220A-TP (Micro Commercial Co) and SMAJ188A-M3/61 (Vishay) represent alternatives for applications where reverse standoff voltage tolerance permits deviation. SMAJP4KE220A-TP offers extended operating temperature range (-55°C ~ 175°C) with 185V reverse standoff voltage. SMAJ188A-M3/61 provides 188V reverse standoff voltage with lower peak pulse current (910mA) and reduced power dissipation (300W).

All substitute parts are ROHS3 compliant, MSL 1 rated, and available in active production status, ensuring long-term supply chain viability.

Frequently Asked Questions (FAQ)

Q: Can SMAJ170A directly replace CD214A-T170ALF? A: Yes. SMAJ170A maintains identical reverse standoff voltage (170V), breakdown voltage (189V), clamping voltage (275V), and package (DO-214AC, SMA). The 1.50A peak pulse current exceeds the original 1.4A specification, providing equivalent or improved performance. Operating temperature range differs slightly (-50°C vs. -55°C minimum), which is acceptable for most general-purpose applications.

Q: What is the difference between direct equivalents and similar substitutes? A: Direct equivalents preserve all critical electrical parameters within the original specification envelope. Similar substitutes maintain the same reverse standoff voltage and package but may vary in clamping voltage, peak pulse current, or power dissipation. Selection depends on circuit requirements and transient protection margins.

Q: Why does SMAJ170A-TR have higher clamping voltage (353V vs. 275V)? A: SMAJ170A-TR is designed for applications requiring greater transient voltage suppression margin. The elevated clamping voltage and 6.5A peak pulse current capability provide enhanced protection for circuits sensitive to higher surge events. This part is suitable where the original 275V clamping specification is insufficient.

Q: Are all substitute parts available in the same packaging? A: Yes. All listed substitute parts use DO-214AC (SMA) surface-mount packaging, ensuring mechanical and thermal compatibility with the original CD214A-T170ALF footprint.

Q: Which substitute offers the best thermal performance? A: SMAJP4KE220A-TP supports the highest operating temperature range (-55°C ~ 175°C), making it suitable for high-temperature environments. However, this part features 185V reverse standoff voltage, requiring circuit verification for voltage tolerance compatibility.

Q: Is RoHS compliance maintained across all substitutes? A: All active substitute parts listed are ROHS3 compliant, meeting environmental and regulatory requirements equivalent to the original CD214A-T170ALF.