HRM-306S SMA Coaxial Connector Equivalent & Substitute Parts

Part Overview

The HRM-306S is an SMA connector receptacle manufactured by Hirose Electric Co Ltd, designed for RF coaxial applications requiring 50-ohm impedance. This female socket connector features panel mount configuration with solder termination for both center contact and shield. The part is currently in active production status with 1029 units available in inventory.

Equivalent and substitute parts are identified when applications require alternative sourcing due to inventory constraints, supply chain considerations, or specific operational requirements within the defined electrical and mechanical parameter ranges.

Substiute Parts

HRM-306S

Hirose Electric Co LtdIn Stock: 1124HRM-306S Datasheet

Current PartRFQ

HRM-300-110S

Hirose Electric Co LtdIn Stock: 1241HRM-300-110S Datasheet

Parametric EquivalentRFQ

HRM-303S

Hirose Electric Co LtdIn Stock: 1203HRM-303S Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the HRM-306S are qualified based on strict equivalence across the following critical parameters:

Electrical Parameters: Connector style (SMA), connector type (receptacle, female socket), impedance (50 ohms), contact and shield termination method (solder), maximum frequency (12.4 GHz), insertion loss (0.1dB), and number of ports (1).

Mechanical Parameters: Mounting type (panel mount), mounting feature (flange), fastening type (threaded), center contact material (beryllium copper), body material (stainless steel), center contact plating (gold), and dielectric material (PTFE).

Environmental & Compliance Parameters: Features (extended insulation), housing color (silver), mating cycles (1000), moisture sensitivity level (MSL 1 - unlimited), and regulatory compliance status.

The substitute parts HRM-300-110S and HRM-303S maintain all critical electrical and mechanical parameters identical to the HRM-306S. Variations in operating temperature range and RoHS certification status do not affect functional substitutability within the specified parameter envelope.

Parameter Comparison

Engineering Selection Recommendations

All three parts—HRM-306S, HRM-300-110S, and HRM-303S—are active production items from Hirose Electric Co Ltd with full RoHS compliance and EAR99 export classification. Selection between these parts is determined by application-specific operating temperature requirements and inventory availability.

The HRM-306S operates within the temperature range of -55°C to 85°C. Applications requiring operation at temperatures between 85°C and 125°C must use either HRM-300-110S or HRM-303S, both of which support the extended upper temperature limit of 125°C.

All parts maintain identical electrical performance characteristics, mechanical interfaces, and RF specifications. MSL rating of 1 (unlimited) applies uniformly across all three parts, indicating no moisture sensitivity constraints for storage or handling.

Frequently Asked Questions (FAQ)

Q: Can HRM-300-110S or HRM-303S be used as direct replacements for HRM-306S in all applications?

A: Yes, within the operating temperature range of -55°C to 85°C. Both substitute parts maintain identical electrical impedance, frequency response, insertion loss, connector geometry, and solder termination specifications. The extended temperature capability of the substitute parts does not introduce incompatibility at lower temperature ranges.

Q: What is the primary difference between HRM-306S and its substitutes?

A: The operating temperature upper limit differs. HRM-306S is rated to 85°C, while HRM-300-110S and HRM-303S are rated to 125°C. All other electrical, mechanical, and RF parameters are identical.

Q: Are there any compliance or certification differences?

A: All three parts are RoHS compliant and carry EAR99 export classification. The HRM-306S carries ROHS3 designation while HRM-300-110S and HRM-303S carry RoHS designation. Both certifications satisfy RoHS compliance requirements. All parts are REACH affected and carry identical HTSUS classification.

Q: Do these parts require different PCB footprints or mounting procedures?

A: No. All three parts feature identical panel mount configuration with flange mounting feature and threaded fastening. PCB layout, hole spacing, and assembly procedures are interchangeable.

Q: What is the moisture sensitivity level for these connectors?

A: All three parts carry MSL rating of 1 (unlimited), indicating no moisture sensitivity constraints. Standard storage and handling procedures apply without special desiccant or humidity control requirements.

Q: Are inventory levels a consideration for part selection?

A: Current inventory shows HRM-300-110S at 1147 units, HRM-303S at 1104 units, and HRM-306S at 1029 units. All parts maintain adequate stock levels for production requirements.