DELTA11C/X/SMAM/S/S/21 Equivalent & Substitute Parts

Part Overview

The DELTA11C/X/SMAM/S/S/21 is a 915MHz ISM band whip antenna with SMA male connector termination, designed for straight-mount applications requiring 2.15dB gain. This part is classified as obsolete, making identification of equivalent substitute components necessary for ongoing system support and new design implementations. The DELTA 11C series antenna operates within the UHF frequency group (300MHz to 1GHz) and is suitable for ISM applications requiring compact RF connectivity.

Substiute Parts

DELTA11C/X/SMAM/S/S/21

Siretta LtdIn Stock: 1123DELTA11C/X/SMAM/S/S/21 Datasheet

Current PartRFQ

DELTA12C/X/SMAM/S/S/17

Siretta LtdIn Stock: 958DELTA12C/X/SMAM/S/S/17 Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the DELTA11C/X/SMAM/S/S/21 is determined by the following critical parameters:

• Frequency Compatibility: Center frequency must be 915MHz to maintain ISM band operation
• Connector Type: SMA Male termination required for mechanical and electrical compatibility
• Antenna Configuration: Whip, straight antenna type for form factor consistency
• RF Family: General ISM standard compliance
• Frequency Group: UHF band operation (300MHz ~ 1GHz)

The DELTA12C/X/SMAM/S/S/17 meets all substitution criteria. Both antennas operate at 915MHz with identical SMA male connectors, whip straight configuration, and ISM band classification. The substitute part is from the same manufacturer (Siretta Ltd) and maintains electrical compatibility through matching VSWR specification (2) and connector interface.

Parameter Comparison

Engineering Selection Recommendations

The DELTA12C/X/SMAM/S/S/17 is the qualified substitute for the obsolete DELTA11C/X/SMAM/S/S/21. Selection should be based on the following factors:

Product Status: The DELTA12C series is active and currently manufactured, ensuring long-term availability and supply chain continuity compared to the obsolete DELTA11C.

Compliance & Certifications: Both parts carry identical ECCN classification (EAR99). The DELTA12C/X/SMAM/S/S/17 includes RoHS3 compliance and REACH unaffected status, providing additional regulatory alignment for modern applications.

Electrical Compatibility: Matching VSWR (2) and identical 915MHz center frequency ensure equivalent RF performance in ISM band circuits. Both parts maintain SMA male connector interface for direct mechanical substitution.

Physical Considerations: The DELTA12C is 40mm taller (130.00mm vs 90.20mm), which must be evaluated against available mounting space in the target application. The increased height correlates with the higher gain specification (3dBi vs 2.15dB).

Frequently Asked Questions (FAQ)

Q: Can the DELTA12C/X/SMAM/S/S/17 directly replace the DELTA11C/X/SMAM/S/S/21?

A: Yes, for 915MHz ISM applications. Both antennas share identical frequency, connector type (SMA Male), antenna configuration (whip straight), and VSWR specification. Physical mounting space must accommodate the 40mm height difference.

Q: What is the difference in gain between these two antennas?

A: The DELTA11C provides 2.15dB gain, while the DELTA12C provides 3dBi gain. This 0.85dB difference reflects the physical size increase and is typical for whip antenna designs in this frequency range.

Q: Are there packaging differences between these parts?

A: The DELTA11C/X/SMAM/S/S/21 is listed with "-" packaging notation, while the DELTA12C/X/SMAM/S/S/17 specifies Bulk packaging. Both are suitable for component-level integration.

Q: What compliance certifications apply to the substitute part?

A: The DELTA12C/X/SMAM/S/S/17 is RoHS3 compliant and REACH unaffected. Both parts carry EAR99 ECCN classification for export control purposes.

Q: Why is the original DELTA11C marked as obsolete?

A: Obsolescence typically results from manufacturer discontinuation decisions. The DELTA12C series represents the current active product line from Siretta Ltd for 915MHz ISM whip antenna applications.