HHM1521 Equivalent & Substitute Parts

Part Overview

The HHM1521 is an RF Balun operating in the 2.4GHz to 2.5GHz frequency band with 50/200 Ohm impedance transformation, packaged in 0805 (2012 Metric) surface mount form factor. This component is classified as Obsolete, necessitating identification of active equivalent parts to maintain design continuity and ensure long-term supply availability for new production and field service applications.

Substiute Parts

HHM1521

TDK CorporationIn Stock: 73246HHM1521 Datasheet

Current PartRFQ

2450BL15B0200001E

Johanson Technology Inc.In Stock: 185172450BL15B0200001E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the HHM1521 is determined by strict equivalence across the following critical parameters:

• Frequency Range: 2.4GHz ~ 2.5GHz (exact match required)
• Impedance Transformation: 50 / 200Ohm (exact match required)
• Phase Difference: 180° ±10° (exact match required)
• Package / Case: 0805 (2012 Metric) (exact match required)
• Mounting Type: Surface Mount (exact match required)

The substitute part 2450BL15B0200001E from Johanson Technology Inc. meets all critical electrical and mechanical parameters, with Active product status enabling continued availability for production applications.

Parameter Comparison

Engineering Selection Recommendations

The 2450BL15B0200001E from Johanson Technology Inc. is the qualified equivalent for the obsolete HHM1521. Selection is based on:

• Identical electrical performance across frequency range, impedance transformation, and phase characteristics
• Identical mechanical compatibility with 0805 surface mount footprint
• Active product status ensuring supply continuity and manufacturing support
• ROHS3 compliance and MSL 1 rating matching environmental and handling requirements
• Return Loss specification of 9.5dB (versus 10dB minimum for HHM1521) remains within acceptable RF performance parameters for 2.4GHz ~ 2.5GHz balun applications

Frequently Asked Questions (FAQ)

Q: Can the 2450BL15B0200001E be used as a direct replacement for HHM1521 in existing designs?

A: Yes. The 2450BL15B0200001E meets all critical electrical and mechanical specifications. Both components operate identically across the 2.4GHz ~ 2.5GHz frequency band with 50/200 Ohm impedance transformation and 0805 surface mount packaging. No circuit modifications are required.

Q: What is the significance of the Return Loss difference (10dB vs 9.5dB)?

A: Both values are within acceptable RF performance ranges for 2.4GHz ~ 2.5GHz balun applications. The 0.5dB difference does not impact functional compatibility or signal integrity in standard wireless applications.

Q: Are there packaging considerations when transitioning from HHM1521 to 2450BL15B0200001E?

A: The HHM1521 packaging is unspecified in available data. The 2450BL15B0200001E is supplied in Tape & Reel (TR) format, standard for high-volume surface mount assembly. Verify packaging compatibility with your procurement and assembly processes.

Q: What compliance certifications apply to both parts?

A: Both HHM1521 and 2450BL15B0200001E are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating. The 2450BL15B0200001E carries REACH Unaffected status. Both are classified under ECCN EAR99 for export control purposes.

Q: Is the 2450BL15B0200001E the only available substitute?

A: Based on the provided substitute list, 2450BL15B0200001E is the qualified equivalent meeting all critical parameters for HHM1521 replacement.