SHT40A-FD1B-R3 Equivalent & Substitute Parts

Part Overview

The SHT40A-FD1B-R3 is an automotive-grade humidity and temperature sensor manufactured by Sensirion AG. This surface-mount component operates across 0–100% RH with ±2% RH accuracy and 4-second response time, communicating via I2C protocol. The part is active in production with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Substitute parts are identified when equivalent electrical specifications, mechanical compatibility, and regulatory certifications align with the main part's operational requirements.

Substiute Parts

SHT40A-FD1B-R3

Sensirion AGIn Stock: 10852SHT40A-FD1B-R3 Datasheet

Current PartRFQ

SHT40A-AD1B-R3

Sensirion AGIn Stock: 11104SHT40A-AD1B-R3 Datasheet

Parametric EquivalentRFQ

SHT40I-BD1B-R3

Sensirion AGIn Stock: 10335SHT40I-BD1B-R3 Datasheet

Parametric EquivalentRFQ

SHT41A-AW1B-R2

Sensirion AGIn Stock: 3245SHT41A-AW1B-R2 Datasheet

Parametric EquivalentRFQ

SHT41A-AW1B-R3

Sensirion AGIn Stock: 9308SHT41A-AW1B-R3 Datasheet

Parametric EquivalentRFQ

SHT41A-BD1B-R2

Sensirion AGIn Stock: 3527SHT41A-BD1B-R2 Datasheet

Parametric EquivalentRFQ

SHT41A-BD1B-R3

Sensirion AGIn Stock: 8761SHT41A-BD1B-R3 Datasheet

Parametric EquivalentRFQ

SHT41A-FD1B-R2

Sensirion AGIn Stock: 3662SHT41A-FD1B-R2 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SHT40A-FD1B-R3 are qualified based on the following criteria:

Electrical Equivalence: All substitute parts maintain identical humidity range (0–100% RH), accuracy (±2% RH), response time (4 s), output type (I2C), output resolution (16-bit), and supply voltage range (2.3V–5.5V).

Thermal Compatibility: All substitutes operate across the same temperature range (-40°C to 125°C), ensuring functional equivalence in automotive and industrial environments.

Mechanical Compatibility: All substitutes use identical package type (4-UDFN Exposed Pad) and supplier device package (4-DFN 1.5x1.5), enabling direct PCB footprint compatibility.

Regulatory Compliance: All substitutes maintain ROHS3 compliance, REACH Unaffected status, and MSL 1 rating, meeting automotive and industrial certification requirements.

Series Consistency: All substitutes belong to the SHT4 series, confirming protocol and firmware compatibility.

The substitute parts differ only in application grade designation (automotive vs. industrial) and packaging revision codes, which do not affect electrical or mechanical performance.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute parts maintain active production status and full ROHS3 compliance, confirming ongoing manufacturer support and regulatory alignment. Selection among substitutes should prioritize inventory availability and application-specific requirements:

Automotive Applications: SHT40A-AD1B-R3, SHT41A-AW1B-R3, SHT41A-BD1B-R3, and SHT41A-FD1B-R2 are designated for automotive-grade environments and carry equivalent certifications to the main part.

Industrial Applications: SHT40I-BD1B-R3 is designated for industrial-grade environments while maintaining identical electrical and thermal specifications.

Packaging Revisions: Parts designated with R2 or R3 suffixes represent packaging revision levels. Both revisions are electrically and mechanically equivalent; selection depends on supply chain availability and manufacturing lot requirements.

Inventory Considerations: SHT40A-AD1B-R3 (11,019 pcs) and SHT41A-AW1B-R3 (9,277 pcs) offer highest stock availability for immediate procurement.

Frequently Asked Questions (FAQ)

Q: Can SHT40A-FD1B-R3 be directly replaced with SHT40I-BD1B-R3?

A: Yes. Both parts share identical electrical specifications (0–100% RH, ±2% RH accuracy, 4 s response time, I2C output, 2.3V–5.5V supply), thermal range (-40°C to 125°C), and mechanical package (4-UDFN Exposed Pad, 1.5x1.5 mm). The difference is application grade designation (automotive vs. industrial), which does not affect functional performance. Both maintain ROHS3 compliance and MSL 1 rating.

Q: What is the difference between SHT40A and SHT41A series parts?

A: Both series belong to the SHT4 family and maintain identical electrical and thermal specifications. The difference is series designation, which reflects manufacturing generation or firmware revision. All listed parts are electrically and mechanically interchangeable within the SHT4 series.

Q: Are packaging revisions (R2 vs. R3) functionally different?

A: No. R2 and R3 designations represent packaging revision levels only. Both revisions maintain identical electrical performance, thermal characteristics, and mechanical footprint (4-DFN 1.5x1.5 mm). Selection between revisions depends on supply chain availability and manufacturing lot requirements.

Q: Can I use SHT41A-AW1B-R2 in place of SHT40A-FD1B-R3?

A: Yes. Both parts maintain identical humidity range (0–100% RH), accuracy (±2% RH), response time (4 s), I2C output, 16-bit resolution, supply voltage (2.3V–5.5V), operating temperature (-40°C to 125°C), and package type (4-UDFN Exposed Pad). Both are ROHS3 compliant and active in production.

Q: What are the key parameters that determine substitutability?

A: Substitutability is determined by: humidity range, accuracy specification, response time, output protocol (I2C), output resolution (16-bit), supply voltage range, operating temperature range, package type (4-UDFN Exposed Pad), and regulatory compliance (ROHS3, REACH Unaffected, MSL 1). All listed substitutes match these parameters with the main part.

Q: Is the SHT40I-BD1B-R3 suitable for automotive applications?

A: The SHT40I-BD1B-R3 is designated for industrial-grade applications. For automotive-specific requirements, use automotive-grade parts: SHT40A-FD1B-R3, SHT40A-AD1B-R3, SHT41A-AW1B-R2, SHT41A-AW1B-R3, SHT41A-BD1B-R2, SHT41A-BD1B-R3, or SHT41A-FD1B-R2.