F5KA881M5D4DB-Z Equivalent & Substitute Parts

Part Overview

The F5KA881M5D4DB-Z is an 881.5MHz Surface Acoustic Wave (SAW) RF filter manufactured by Taiyo Yuden, designed for cellular and CDMA applications. This component operates at a center frequency of 881.5MHz with a 25MHz bandwidth and 1.7dB insertion loss in a 5-SMD, no-lead surface mount package.

The F5KA881M5D4DB-Z carries a product status of "Not For New Designs," indicating that Taiyo Yuden has discontinued this model for new applications. Organizations currently using this part in active production or maintenance applications require equivalent substitute components that maintain electrical and mechanical compatibility while offering continued supply availability.

Substiute Parts

F5KA881M5D4DB-Z

Taiyo YudenIn Stock: 2797F5KA881M5D4DB-Z Datasheet

Current PartRFQ

F5QA881M5M2AU-J

Taiyo YudenIn Stock: 89352F5QA881M5M2AU-J Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the F5KA881M5D4DB-Z is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Center frequency: 881.5MHz (exact match required)
• Bandwidth: 25MHz (exact match required)
• Insertion loss: Must not exceed 1.7dB
• RF filter technology: Surface Acoustic Wave (SAW)

Mechanical Compatibility Requirements:

• Package type: 5-SMD, No Lead (exact match required)
• Mounting type: Surface Mount (exact match required)
• Maximum height: 0.020" (0.50mm) or less
• Physical dimensions: Must fit within PCB footprint constraints

Compliance & Supply Requirements:

• RoHS3 compliance (mandatory for regulated applications)
• Moisture Sensitivity Level 1 (unlimited shelf life)
• Active inventory availability

The F5QA881M5M2AU-J meets all electrical and mechanical compatibility criteria while offering superior insertion loss performance (1.3dB versus 1.7dB) and expanded application support.

Parameter Comparison

Engineering Selection Recommendations

The F5QA881M5M2AU-J is a direct electrical and mechanical substitute for the F5KA881M5D4DB-Z. Both components are manufactured by Taiyo Yuden within the F5 series and share identical center frequency, bandwidth, package configuration, and compliance certifications.

Electrical Performance: The F5QA881M5M2AU-J delivers 0.4dB lower insertion loss (1.3dB versus 1.7dB), resulting in improved signal transmission efficiency. This performance advantage is compatible with all applications originally specified for the F5KA881M5D4DB-Z.

Physical Compatibility: The substitute part features a smaller footprint (1.10mm x 0.90mm versus 1.40mm x 1.00mm) while maintaining identical maximum height (0.50mm). This dimensional reduction provides layout flexibility for PCB designs without requiring footprint modifications.

Compliance & Availability: Both parts maintain ROHS3 compliance and MSL Level 1 rating. The F5QA881M5M2AU-J offers significantly higher inventory availability (89,300 pieces versus 2,741 pieces), supporting sustained production requirements.

Application Scope: The F5QA881M5M2AU-J supports expanded application coverage (CDMA, WCDMA, LTE) compared to the original part (Cellular, CDMA), enabling use in broader cellular technology implementations.

Packaging Consideration: The substitute part is supplied in Cut Tape (CT) and Digi-Reel® format, differing from the original Tape & Reel (TR) packaging. Procurement and assembly processes must accommodate this packaging format difference.

Frequently Asked Questions (FAQ)

Q: Can the F5QA881M5M2AU-J replace the F5KA881M5D4DB-Z in existing PCB designs without layout modifications?

A: The F5QA881M5M2AU-J has a smaller footprint (1.10mm x 0.90mm versus 1.40mm x 1.00mm) and identical maximum height. Existing PCB footprints designed for the F5KA881M5D4DB-Z will accommodate the substitute part. However, verify that your PCB layout does not rely on the larger dimensions of the original component.

Q: What is the electrical performance difference between these two parts?

A: The F5QA881M5M2AU-J provides 0.4dB lower insertion loss (1.3dB versus 1.7dB) while maintaining identical center frequency (881.5MHz) and bandwidth (25MHz). This improvement results in better signal transmission efficiency without requiring circuit redesign.

Q: Are both parts RoHS compliant?

A: Yes. Both the F5KA881M5D4DB-Z and F5QA881M5M2AU-J are ROHS3 compliant and carry Moisture Sensitivity Level 1 (unlimited shelf life), meeting regulatory requirements for controlled and uncontrolled environments.

Q: Why does the substitute part support more applications (CDMA, WCDMA, LTE) than the original?

A: The F5QA881M5M2AU-J is a newer design within the F5 series that maintains the same electrical specifications (881.5MHz center frequency, 25MHz bandwidth) while supporting additional cellular standards. The expanded application list reflects the part's capability to function across multiple technology platforms without performance degradation.

Q: What is the difference between Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® packaging?

A: Tape & Reel (TR) supplies components on continuous carrier tape wound on reels, suitable for high-volume automated assembly. Cut Tape (CT) provides components on shorter tape segments, and Digi-Reel® is a proprietary packaging format. Verify that your assembly equipment and procurement processes support the Cut Tape (CT) and Digi-Reel® format before transitioning to the F5QA881M5M2AU-J.

Q: Is the F5QA881M5M2AU-J also marked as "Not For New Designs"?

A: Yes. Both the F5KA881M5D4DB-Z and F5QA881M5M2AU-J carry "Not For New Designs" status from Taiyo Yuden. This designation indicates that both parts are in end-of-life phases. For new product development, consult Taiyo Yuden for current-generation SAW filter alternatives.

Q: Can I use the F5QA881M5M2AU-J in applications originally specified for Cellular and CDMA only?

A: Yes. The F5QA881M5M2AU-J maintains identical electrical specifications and is fully compatible with all Cellular and CDMA applications. The expanded application list (WCDMA, LTE) indicates additional capability, not a requirement for use in those standards.