HSMP-381Z-BLKG RF Diode PIN Equivalent & Substitute Parts

Part Overview

The HSMP-381Z-BLKG is an RF Diode PIN manufactured by Broadcom Limited, rated for 100V peak reverse voltage with 1 A maximum current in an SOT-323 package. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing design support and production continuity. Equivalent parts must maintain functional compatibility within the RF diode PIN category while accommodating the electrical and mechanical constraints of the application.

Key Parameters

Parameter	Value
Diode Type	PIN - Single
Voltage - Peak Reverse (Max)	100V
Current - Max	1 A
Capacitance @ Vr, F	0.35pF @ 50V, 1MHz
Resistance @ If, F	3Ohm @ 100mA, 100MHz
Operating Temperature	150°C (TJ)
Package / Case	SC-70, SOT-323
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the HSMP-381Z-BLKG is constrained by the following critical parameters:

Voltage Rating: The main part operates at 100V peak reverse voltage. Substitute parts must support equivalent or higher voltage ratings to maintain circuit protection and reliability margins.

Diode Type: The HSMP-381Z-BLKG is classified as a PIN - Single diode. Substitutes must remain within the PIN diode category to preserve RF switching and attenuation characteristics.

Package Compatibility: The SOT-323 package (SC-70) is the mechanical constraint. Substitute parts must use compatible package types to ensure PCB footprint alignment.

Current and Resistance Characteristics: Maximum current and forward resistance at specified bias conditions determine RF performance in switching and attenuator applications.

The identified substitute parts (BA592E6327HTSA1, BA592E6433HTMA1, and BAP51-03,115) represent available alternatives within the RF diode PIN category. However, these parts operate at reduced voltage ratings (35V and 50V respectively) compared to the original 100V specification. Selection must account for application voltage requirements.

Parameter Comparison

Parameter	HSMP-381Z-BLKG (Main)	BA592E6327HTSA1	BA592E6433HTMA1	BAP51-03,115
Manufacturer	Broadcom Limited	Infineon Technologies	Infineon Technologies	NXP USA Inc.
Diode Type	PIN - Single	Standard - Single	Standard - Single	PIN - Single
Voltage - Peak Reverse (Max)	100V	35V	35V	50V
Current - Max	1 A	100 mA	100 mA	50 mA
Capacitance @ Vr, F	0.35pF @ 50V, 1MHz	1.1pF @ 3V, 1MHz	1.1pF @ 3V, 1MHz	0.35pF @ 5V, 1MHz
Resistance @ If, F	3Ohm @ 100mA, 100MHz	500mOhm @ 10mA, 100MHz	500mOhm @ 10mA, 100MHz	2.5Ohm @ 10mA, 100MHz
Operating Temperature	150°C (TJ)	150°C (TJ)	150°C (TJ)	-65°C ~ 150°C (TJ)
Package / Case	SC-70, SOD-323	SC-76, SOD-323	SC-76, SOD-323	SC-76, SOD-323
Product Status	Obsolete	Not For New Designs	Not For New Designs	Active
RoHS Status	REACH Unaffected	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

BAP51-03,115 (NXP USA Inc.) is the preferred substitute option. This part maintains PIN diode classification, operates at 50V peak reverse voltage, and carries Active product status with ROHS3 compliance. The 50V rating provides operational margin for applications not requiring the full 100V specification of the original part. This part is currently in production and widely available.

BA592E6327HTSA1 and BA592E6433HTMA1 (Infineon Technologies) are classified as Standard diodes rather than PIN diodes and carry Not For New Designs status. These parts operate at 35V peak reverse voltage. Selection of these alternatives requires confirmation that the application voltage requirements do not exceed 35V and that Standard diode characteristics are functionally equivalent to PIN diode performance in the target circuit.

All substitute candidates maintain MSL 1 (Unlimited) moisture sensitivity and 150°C maximum junction temperature compatibility with the original part.

Frequently Asked Questions (FAQ)

Q: Can BA592E6327HTSA1 or BA592E6433HTMA1 directly replace HSMP-381Z-BLKG?

A: These Infineon parts differ in two critical aspects: they are classified as Standard diodes rather than PIN diodes, and they operate at 35V peak reverse voltage versus the original 100V rating. Direct substitution is only valid if the application circuit operates below 35V and Standard diode RF characteristics are functionally equivalent to PIN diode performance in the specific switching or attenuation function.

Q: Why is BAP51-03,115 recommended over the Infineon alternatives?

A: BAP51-03,115 maintains PIN diode classification, matching the original part category. It carries Active product status with current manufacturing support and ROHS3 compliance. The 50V rating provides higher voltage margin than the 35V Infineon parts while remaining suitable for most RF applications not requiring the full 100V specification.

Q: Are package differences between SC-70 and SC-76 significant?

A: Both SC-70 and SC-76 designations refer to SOD-323 package variants. Physical compatibility depends on PCB footprint design. Verification of footprint alignment with the selected substitute is required before implementation.

Q: What is the impact of reduced current ratings in substitute parts?

A: The HSMP-381Z-BLKG supports 1 A maximum current. Substitute parts are rated at 100 mA (Infineon) or 50 mA (NXP). Applications requiring forward current above these limits cannot use these substitutes. Circuit design must confirm that operating current remains within the selected substitute's maximum rating.

Q: Do all substitute parts meet the same compliance requirements?

A: All substitute parts carry MSL 1 (Unlimited) moisture sensitivity and REACH Unaffected or ROHS3 Compliant status. Operating temperature range is 150°C (TJ) for all parts, with BAP51-03,115 additionally specifying -65°C minimum temperature.

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