CD214A-T48ALF Equivalent & Substitute Parts

Part Overview

The CD214A-T48ALF is a unidirectional Zener transient voltage suppressor (TVS) diode manufactured by Bourns Inc., designed for general-purpose overvoltage protection applications. This component features a 48V reverse standoff voltage with a 77.4V maximum clamping voltage and 5.2A peak pulse current capability in a surface-mount DO-214AC (SMA) package. The part is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements. Substitute parts must maintain electrical compatibility across voltage ratings, current handling, and thermal performance while meeting the same packaging and compliance standards.

Substiute Parts

CD214A-T48ALF

Bourns Inc.In Stock: 925CD214A-T48ALF Datasheet

Current PartRFQ

SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

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SMAJ48A

MDDIn Stock: 202171SMAJ48A Datasheet

DirectRFQ

P4SMA47A-M3/61

Vishay General Semiconductor - Diodes DivisionIn Stock: 731P4SMA47A-M3/61 Datasheet

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SM4T56AY

STMicroelectronicsIn Stock: 2814SM4T56AY Datasheet

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SMA6J48A-TR

STMicroelectronicsIn Stock: 30409SMA6J48A-TR Datasheet

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SMAJ45A-M3/5A

Vishay General Semiconductor - Diodes DivisionIn Stock: 1045SMAJ45A-M3/5A Datasheet

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SMAJ48A-TP

Micro Commercial CoIn Stock: 5986SMAJ48A-TP Datasheet

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SMAJ48A-TR

STMicroelectronicsIn Stock: 2557SMAJ48A-TR Datasheet

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SMAJP4KE51A-TP

Micro Commercial CoIn Stock: 1106SMAJP4KE51A-TP Datasheet

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SMAJP4KE56A-TP

Micro Commercial CoIn Stock: 1142SMAJP4KE56A-TP Datasheet

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TV04A480J-G

Comchip TechnologyIn Stock: 972TV04A480J-G Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD214A-T48ALF are classified into two categories based on electrical parameter alignment:

Direct Substitutes maintain identical electrical specifications across all critical parameters: 48V reverse standoff voltage, 53.3V minimum breakdown voltage, 77.4V maximum clamping voltage, and 5.2A peak pulse current. These parts are pin-compatible and functionally interchangeable without circuit modification.

Similar Substitutes share the same 48V reverse standoff voltage and comparable clamping voltage performance but may differ in peak pulse current ratings, clamping voltage magnitude, or temperature operating ranges. Selection of similar substitutes requires verification that the application tolerates these parameter variations.

The following parameters determine substitution eligibility:

• Voltage - Reverse Standoff (Typ): 48V (primary criterion)
• Voltage - Clamping (Max) @ Ipp: 77.4V ±tolerance
• Current - Peak Pulse (10/1000µs): 5.2A minimum
• Package / Case: DO-214AC, SMA (mandatory)
• Mounting Type: Surface Mount (mandatory)
• Type: Zener, Unidirectional (mandatory)

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Preferred)

SMAJ48A (MDD) and SMAJ48A-TP (Micro Commercial Co) are direct electrical equivalents with identical voltage and current ratings. Both are active products with ROHS3 compliance and MSL 1 rating. SMAJ48A-TP offers an extended upper operating temperature of 175°C compared to the original 150°C specification. Selection between these two depends on packaging format availability and supply chain requirements.

Higher Current Capacity Alternatives

SM4T56AY (STMicroelectronics) and SMAJ48A-TR (STMicroelectronics) maintain the 48V reverse standoff voltage but provide significantly higher peak pulse current (23A) and elevated clamping voltage (100V). These parts are suitable for applications requiring enhanced transient suppression margin. Both carry AEC-Q101 automotive qualification (SM4T56AY) and ROHS3 compliance.

Enhanced Thermal Performance

SMA6J48A-TR (STMicroelectronics) combines the 48V standoff voltage with 88.4V clamping voltage, 40A peak pulse current, and 600W peak power dissipation. Operating temperature extends to 175°C. This part accommodates higher energy transient events and elevated ambient conditions.

Lower Voltage Alternatives

SMAJ45A-M3/5A (Vishay) and SMAJP4KE51A-TP (Micro Commercial Co) operate at reduced standoff voltages (45V and 43.6V respectively) with comparable clamping performance. These are suitable only if circuit design tolerates lower protection thresholds.

Marginal Compatibility

P4SMA47A-M3/61 (Vishay) and SMAJP4KE56A-TP (Micro Commercial Co) exhibit voltage parameters within 5% of the original specification. SMAJP4KE56A-TP provides near-identical electrical performance with extended temperature range. P4SMA47A-M3/61 operates at 40.2V standoff voltage, representing a 16% reduction from the original 48V specification.

All recommended substitutes maintain DO-214AC (SMA) package compatibility, surface-mount configuration, and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can SMAJ48A directly replace CD214A-T48ALF without circuit modification?

A: Yes. SMAJ48A (MDD) is a direct electrical equivalent with identical voltage ratings (48V standoff, 77.4V clamping), current capacity (5.2A), and power dissipation (400W). Pin configuration and package (DO-214AC, SMA) are identical. No circuit changes are required.

Q: What is the difference between SMAJ48A-TP and SMAJ48A-TR?

A: Both maintain identical electrical specifications (48V standoff, 53.3V breakdown, 77.4V clamping, 5.2A peak pulse). SMAJ48A-TP (Micro Commercial Co) operates to 175°C; SMAJ48A-TR (STMicroelectronics) provides 23A peak pulse current and 100V clamping voltage, representing enhanced transient suppression. SMAJ48A-TR is suitable for higher-energy transient environments.

Q: Can I use SM4T56AY or SMA6J48A-TR as substitutes?

A: These parts are compatible from a package and standoff voltage perspective but provide significantly higher current capacity and clamping voltage. SM4T56AY delivers 23A peak pulse current with 100V clamping; SMA6J48A-TR delivers 40A peak pulse current with 88.4V clamping and 600W power dissipation. Use these only if the application requires enhanced transient protection margin or operates in high-energy transient environments.

Q: Why is P4SMA47A-M3/61 listed as a similar substitute?

A: P4SMA47A-M3/61 operates at 40.2V reverse standoff voltage, approximately 16% lower than the original 48V specification. Clamping voltage is 64.8V versus 77.4V. This part is suitable only if circuit design tolerates reduced protection thresholds. The lower voltage rating makes it a marginal substitute for general-purpose applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitute parts carry ROHS3 compliance certification. Moisture sensitivity level (MSL) is uniformly rated at 1 (Unlimited) across all parts, indicating no moisture-related handling restrictions.

Q: What is the significance of the 8/20µs pulse specification on some parts?

A: Parts designated with 8/20µs pulse specification (SM4T56AY, SMAJ48A-TR, SMA6J48A-TR) are tested under a different transient waveform than the standard 10/1000µs specification. The 8/20µs waveform represents a faster, higher-amplitude transient event. These parts deliver higher peak current ratings under this more stringent test condition, indicating superior transient suppression capability.

Q: Can I substitute SMAJP4KE56A-TP for CD214A-T48ALF?

A: SMAJP4KE56A-TP is marginally compatible. It operates at 47.8V reverse standoff voltage (within 0.4% of the original 48V) with 77V clamping voltage (within 0.5% of the original 77.4V) and 5.3A peak pulse current (within 2% of the original 5.2A). Extended operating temperature to 175°C provides thermal margin. This part is suitable as a substitute with minimal circuit impact.

Q: What packaging formats are available for substitute parts?

A: All substitute parts are supplied in DO-214AC (SMA) surface-mount package. Packaging options vary by manufacturer: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel®, and Bulk formats are available. Verify packaging format availability with your supplier before design finalization.