MADP-000235-10720T

RF Diode Overview

The MADP-000235-10720T is a surface-mountable PIN diode in a non-magnetic rectangular MELF SMQ ceramic package. It utilizes HIPAX technology for low inductance and hermetic sealing with extremely low permeability. The passivated chip features full-face bonding to minimize electrical and thermal resistance. Designed for RF coil protection and tuning in MRI applications, it operates from -55°C to +150°C. Key electrical parameters include a reverse voltage of 35V, capacitance of 1.2pF, series resistance of 0.5Ω, parallel resistance of 5kΩ, thermal resistance of 20°C/W, power dissipation of 7.5W, and carrier lifetime of 0.3µs.

RF Diode Feature Summary

• Non-magnetic package suitable for MRI environments
• Hermetically sealed rectangular MELF SMQ ceramic construction
• Full-face bonded passivated PIN chip for low resistance
• RoHS compliant and compatible with standard reflow soldering

RF Diode Applications

• Circuit protection for RF coils in MRI systems
• Tuning circuits for MRI RF coil designs
• Anti-parallel configuration for surge protection

RF Diode Procurement Notes

Verify the specific revision level (Rev. V1) against current MACOM documentation before procurement. Confirm RoHS compliance status and tin-plated terminal specifications for solderability requirements. Ensure storage conditions avoid high humidity to prevent oxidation of the solderable surfaces prior to assembly.

RF Diode Selection Notes

Select this component when non-magnetic properties are critical for MRI compatibility. Evaluate the 1.2pF capacitance and 0.5Ω series resistance against circuit impedance requirements. Consider the 7.5W power dissipation rating and 20°C/W thermal resistance for heat management in enclosed RF coil assemblies.

RF Diode Part Context

This device belongs to M/A-COM's HIPAX technology family, utilizing non-magnetic plating processes. It replaces magnetic variants like MA4PH235-1072T in sensitive magnetic field environments. The 1072 package style supports automated pick-and-place assembly with vacuum or key jaw techniques.

RF Diode Replacement Considerations

MA4PH235-1072T: Magnetic variant; unsuitable for MRI. MA4P7461F-1072T: Non-magnetic alternative; verify electrical parameter differences.

RF Diode FAQ

Is the MADP-000235-10720T magnetic?

No, it uses a unique non-magnetic plating process providing extremely low permeability.

What is the maximum operating temperature?

The device operates up to +150°C.

How is the PIN chip bonded?

It is full-face bonded on both cathode and anode to maximize contact area.