QAM-RX3-433 RF Receiver AM 433MHz Equivalent & Substitute Parts

Part Overview

The QAM-RX3-433 is an RF receiver module operating at 433MHz with AM modulation, designed for remote control, RKE (Remote Keyless Entry), and security system applications. This through-hole PCB module delivers -108dBm sensitivity with a receiving current of 6mA and operates across a 3.3V to 8V supply range.

The QAM-RX3-433 is classified as obsolete. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production or maintenance requirements for systems utilizing this receiver module.

Substiute Parts

QAM-RX3-433

RF SolutionsIn Stock: 1190QAM-RX3-433 Datasheet

Current PartRFQ

AM-RX9-433P

RF SolutionsIn Stock: 867AM-RX9-433P Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the QAM-RX3-433 is evaluated based on the following critical parameters:

Mandatory Matching Criteria:

• Frequency: 433MHz (RF band compatibility)
• Modulation: AM (signal encoding compatibility)
• Mounting Type: Through Hole (PCB integration compatibility)

Compatible Variation Criteria:

• Sensitivity: Equal to or better than -108dBm (improved or equivalent reception)
• Voltage Supply: Overlapping or compatible range with 3.3V ~ 8V
• Current - Receiving: Lower or equal consumption preferred (power efficiency)
• Data Interface: Functional compatibility with system architecture

The AM-RX9-433P meets the mandatory matching criteria for frequency (433MHz) and modulation (AM). Both devices are through-hole mounted modules. The substitute exhibits improved sensitivity (-109dBm vs. -108dBm) and reduced receiving current (2.6mA vs. 6mA), representing enhanced performance characteristics. However, the voltage supply range differs (2.4V ~ 5.5V vs. 3.3V ~ 8V), and the data interface changes from PCB through-hole to SPI, requiring circuit design evaluation.

Parameter Comparison

Engineering Selection Recommendations

Substitution Feasibility:

The AM-RX9-433P is a viable substitute for the obsolete QAM-RX3-433 based on matching RF parameters (433MHz frequency, AM modulation) and identical through-hole mounting type. Both devices are manufactured by RF Solutions and maintain the same core functionality for remote control, RKE, and security system applications.

Key Considerations:

1. Data Interface Change: The primary design consideration is the transition from PCB through-hole direct interface to SPI (Serial Peripheral Interface). This requires circuit redesign to accommodate the serial communication protocol, including microcontroller interface modifications.

2. Voltage Supply Range: The substitute operates within 2.4V ~ 5.5V, which overlaps with the original part's 3.3V ~ 8V range at 3.3V ~ 5.5V. Systems designed for the full 3.3V ~ 8V range must be re-evaluated for the narrower substitute range.

3. Performance Improvements: The AM-RX9-433P provides superior sensitivity (-109dBm vs. -108dBm) and significantly reduced power consumption (2.6mA vs. 6mA), offering potential benefits for battery-powered applications.

4. Product Status: The substitute is in active production status, ensuring long-term availability and supply chain stability compared to the obsolete QAM-RX3-433.

5. Compliance: The AM-RX9-433P is ROHS3 compliant, meeting current environmental and regulatory requirements.

Recommendation: Substitution is technically feasible for applications where the SPI interface can be accommodated in the system design and the voltage supply range is compatible with 2.4V ~ 5.5V operation.

Frequently Asked Questions (FAQ)

Q: Can the AM-RX9-433P be used as a direct drop-in replacement for the QAM-RX3-433?

A: No. While both devices operate at 433MHz with AM modulation and through-hole mounting, the data interface differs fundamentally. The QAM-RX3-433 uses direct PCB through-hole connection, whereas the AM-RX9-433P uses SPI serial interface. Circuit redesign is required to accommodate the serial communication protocol.

Q: What is the compatible voltage supply range for substitution?

A: The overlapping voltage range between both devices is 3.3V ~ 5.5V. Systems designed for the full 3.3V ~ 8V range of the original part must be re-evaluated if using the substitute, which operates only to 5.5V maximum.

Q: Does the improved sensitivity of the AM-RX9-433P affect compatibility?

A: Improved sensitivity (-109dBm vs. -108dBm) is a performance enhancement and does not negatively affect compatibility. The substitute can detect weaker signals than the original part, which is beneficial for reception reliability.

Q: What is the significance of the reduced receiving current in the AM-RX9-433P?

A: The substitute consumes 2.6mA versus 6mA, representing 56.7% lower power consumption. This is advantageous for battery-powered applications, extending operational life without affecting RF performance.

Q: Are there any compliance differences between the two parts?

A: The AM-RX9-433P is ROHS3 compliant, meeting current environmental regulations. The original QAM-RX3-433 compliance status is not specified. The substitute's active production status and RoHS3 compliance ensure regulatory alignment with current standards.

Q: What is the maximum data rate for the AM-RX9-433P?

A: The substitute specifies a maximum data rate of 10kbps. The original part does not specify a data rate parameter. This specification should be verified against application requirements.

Q: Is the operating temperature range specified for the AM-RX9-433P?

A: The operating temperature range for the AM-RX9-433P is not provided in the available specifications. The original part operates from -40°C to 85°C. Temperature range compatibility should be confirmed with the manufacturer before final selection.