HSMP-4820-BLKG RF PIN Diode Equivalent & Substitute Parts

Part Overview

The HSMP-4820-BLKG is an RF PIN diode manufactured by Broadcom Limited, designed for RF switching and attenuation applications. This single PIN diode operates at peak reverse voltages up to 50V with a maximum current rating of 1A in a compact SOT-23-3 surface mount package. The part is currently classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Diode Type	PIN - Single
Voltage - Peak Reverse (Max)	50V
Current - Max	1 A
Capacitance @ Vr, F	0.75pF @ 20V, 1MHz
Resistance @ If, F	600mOhm @ 10mA, 1MHz
Operating Temperature	150°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitution for the HSMP-4820-BLKG is determined by the following electrical and mechanical criteria:

Primary Substitution Parameters:

Diode Type: PIN - Single (required match)
Peak Reverse Voltage: Minimum 50V (equal or higher acceptable)
Maximum Current: Minimum 1A (equal or higher acceptable)
Package Compatibility: SOT-23-3 or equivalent footprint
Capacitance and Resistance characteristics within functional tolerance

The three qualified substitute parts meet these criteria with varying performance enhancements. CLA4605-085LF and CLA4608-085LF offer higher voltage ratings and improved thermal performance in QFN packages. MA4P7436-287T maintains the original SOT-23-3 package form factor while providing higher voltage capability.

Parameter Comparison

Parameter	HSMP-4820-BLKG	CLA4605-085LF	CLA4608-085LF	MA4P7436-287T
Manufacturer	Broadcom Limited	Skyworks Solutions Inc.	Skyworks Solutions Inc.	MACOM Technology Solutions
Diode Type	PIN - Single	PIN - Single	PIN - Single	PIN - Single
Voltage - Peak Reverse (Max)	50V	60V	180V	75V
Current - Max	1 A	1.5 A	1.5 A	150 mA
Capacitance @ Vr, F	0.75pF @ 20V, 1MHz	0.45pF @ 6V, 1MHz	0.65pF @ 38V, 1MHz	1pF @ 20V, 1MHz
Resistance @ If, F	600mOhm @ 10mA, 1MHz	2Ohm @ 10mA, 500MHz	1.2Ohm @ 10mA, 500MHz	500mOhm @ 10mA, 100MHz
Power Dissipation (Max)	Not specified	1 W	2 W	250 mW
Operating Temperature	150°C (TJ)	175°C (TJ)	175°C (TJ)	175°C (TJ)
Package / Case	TO-236-3, SC-59, SOT-23-3	2-VDFN Exposed Pad, 3-QFN (2x2)	2-VDFN Exposed Pad, 3-QFN (2x2)	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	Not specified

Engineering Selection Recommendations

CLA4605-085LF (Skyworks Solutions Inc.) is suitable for applications requiring the original 50V minimum voltage specification with enhanced performance. This part provides 60V peak reverse voltage, 1.5A maximum current, and improved thermal characteristics (175°C operating temperature). The 3-QFN (2x2) package requires PCB layout modification from the original SOT-23-3. This part is active and ROHS3 compliant.

CLA4608-085LF (Skyworks Solutions Inc.) is appropriate for designs requiring higher voltage headroom or increased power dissipation capability. With 180V peak reverse voltage and 2W power dissipation rating, this part accommodates more demanding RF switching applications. Like CLA4605-085LF, it requires package footprint redesign and is active with ROHS3 compliance.

MA4P7436-287T (MACOM Technology Solutions) maintains the original SOT-23-3 package footprint, eliminating PCB redesign requirements. This part provides 75V peak reverse voltage and 250mW power dissipation. However, the 150mA maximum current rating is below the original 1A specification and may not be suitable for all applications. This part is active and lead-free.

Selection should prioritize package compatibility requirements and current rating demands of the target application.

Frequently Asked Questions (FAQ)

Q: Can CLA4605-085LF or CLA4608-085LF be used as direct pin-for-pin replacements?

A: No. While both Skyworks parts are functionally equivalent PIN diodes, they use 3-QFN (2x2) packages instead of the original SOT-23-3. PCB layout and footprint modifications are required.

Q: Is MA4P7436-287T a direct replacement for HSMP-4820-BLKG?

A: MA4P7436-287T maintains the SOT-23-3 package, allowing direct footprint compatibility. However, the 150mA maximum current rating is significantly lower than the original 1A specification. Verify that your application current requirements do not exceed 150mA before selecting this part.

Q: What are the key differences between the three substitute options?

A: CLA4605-085LF and CLA4608-085LF offer higher voltage ratings (60V and 180V respectively) and improved thermal performance but require package redesign. MA4P7436-287T preserves the original package but has reduced current capacity. CLA4608-085LF provides the highest power dissipation capability at 2W.

Q: Are all substitute parts RoHS compliant?

A: CLA4605-085LF and CLA4608-085LF are ROHS3 compliant. RoHS status for MA4P7436-287T is not specified in available documentation.

Q: What is the operating temperature range for each substitute?

A: CLA4605-085LF and CLA4608-085LF both operate to 175°C junction temperature, compared to 150°C for the original HSMP-4820-BLKG. MA4P7436-287T also operates to 175°C.

Q: Can I use a higher voltage-rated diode in place of the 50V HSMP-4820-BLKG?

A: Yes. Higher voltage ratings provide design margin and are functionally compatible. CLA4608-085LF at 180V and CLA4605-085LF at 60V both exceed the minimum 50V requirement. MA4P7436-287T at 75V also provides voltage headroom.

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