PACDN044Y5R Equivalent & Substitute Parts

Part Overview

The PACDN044Y5R is a 4-channel transient voltage suppressor (TVS) diode manufactured by onsemi, housed in a SOT-23-5 surface mount package. This component is designed for general-purpose transient voltage suppression with a reverse standoff voltage of 5.5V and maximum clamping voltage of 8V. The part is currently obsolete, making equivalent substitutes necessary for new designs and ongoing production requirements.

Substiute Parts

PACDN044Y5R

onsemiIn Stock: 4241PACDN044Y5R Datasheet

Current PartRFQ

SMS05CT1G

onsemiIn Stock: 12304SMS05CT1G Datasheet

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FTZU6.2ET148

Rohm SemiconductorIn Stock: 4673FTZU6.2ET148 Datasheet

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ESDA6V1SC5

STMicroelectronicsIn Stock: 20197ESDA6V1SC5 Datasheet

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SP0504BAHTG

Littelfuse Inc.In Stock: 52484SP0504BAHTG Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the PACDN044Y5R is determined by the following critical parameters:

• Unidirectional Channels: Must be 4 channels to maintain circuit compatibility
• Voltage - Reverse Standoff (Typ): Must be 5.5V or within acceptable tolerance (5.0V–5.5V range)
• Voltage - Breakdown (Min): Must be in the 5.9V–6.2V range
• Voltage - Clamping (Max) @ Ipp: Must be 8V or lower to ensure adequate transient suppression
• Package / Case: Must be SOT-23-5 or equivalent SC-74A/SOT-753 footprint for PCB compatibility
• Mounting Type: Must be Surface Mount

The substitute parts listed below meet these criteria and are available from active product lines, eliminating obsolescence risk.

Parameter Comparison

Engineering Selection Recommendations

Direct Substitutes (Highest Compatibility):

• FTZU6.2ET148 (Rohm Semiconductor): Maintains identical reverse standoff voltage (5.5V), 4-channel configuration, and SOT-23-5 package footprint. ROHS3 compliant and actively manufactured.

• SP0504BAHTG (Littelfuse Inc.): Matches reverse standoff voltage (5.5V), 4-channel configuration, and SOT-23-5 package. Clamping voltage of 8.5V is within acceptable tolerance. ROHS3 compliant with high inventory availability.

• ESDA6V1SC5 (STMicroelectronics): Provides 4-channel configuration in SOT-23-5 package with reverse standoff voltage of 5.25V (within tolerance). ROHS3 compliant and actively produced.

Alternative Substitute (Package Consideration):

• SMS05CT1G (onsemi): Offers 5 channels in a 6-TSOP package instead of SOT-23-5. This part requires PCB layout modification due to different pin configuration and package footprint. Use only if circuit design permits additional channels and package change.

All substitute parts are ROHS3 compliant and carry MSL rating of 1 (Unlimited), matching the original part's environmental specifications.

Frequently Asked Questions (FAQ)

Q: Can SMS05CT1G be used as a direct replacement for PACDN044Y5R?

A: SMS05CT1G is not a direct pin-for-pin replacement. It features 5 channels instead of 4 and uses a 6-TSOP package instead of SOT-23-5. PCB redesign is required. Consider FTZU6.2ET148, SP0504BAHTG, or ESDA6V1SC5 for direct footprint compatibility.

Q: What is the primary reason for substitution?

A: The PACDN044Y5R is obsolete. FTZU6.2ET148, SP0504BAHTG, and ESDA6V1SC5 are active products with guaranteed long-term availability.

Q: Are all substitute parts RoHS compliant?

A: Yes. FTZU6.2ET148, SP0504BAHTG, and ESDA6V1SC5 are all ROHS3 compliant. The original PACDN044Y5R RoHS status is not specified.

Q: Do substitute parts have the same operating temperature range?

A: FTZU6.2ET148 operating temperature is not specified. SP0504BAHTG matches the original at -40°C ~ 85°C. ESDA6V1SC5 extends to -40°C ~ 125°C, providing wider temperature coverage.

Q: Which substitute offers the best inventory availability?

A: SP0504BAHTG (Littelfuse Inc.) has the highest inventory at 52,410 pieces. ESDA6V1SC5 (STMicroelectronics) has 20,100 pieces. Both ensure supply continuity.

Q: Can I use these substitutes interchangeably in the same design?

A: FTZU6.2ET148, SP0504BAHTG, and ESDA6V1SC5 are interchangeable for applications requiring 4-channel TVS diodes with 5.5V reverse standoff voltage in SOT-23-5 packages. Verify clamping voltage specifications against your circuit requirements.