BA591 RF Diode Standard - Equivalent & Substitute Parts

Part Overview

The BA591 is an RF diode standard manufactured by NXP USA Inc., classified as a single diode in the SOD-323 package. It operates at a peak reverse voltage of 35V with a maximum current rating of 100 mA and power dissipation of 500 mW. The part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Substiute Parts

BA591,135

NXP USA Inc.In Stock: 920BA591,135 Datasheet

Current PartRFQ

1SV307(TPH3,F)

Toshiba Semiconductor and StorageIn Stock: 202681SV307(TPH3,F) Datasheet

MFR RecommendedRFQ

SMP1320-011LF

Skyworks Solutions Inc.In Stock: 2611SMP1320-011LF Datasheet

MFR RecommendedRFQ

SMP1321-011LF

Skyworks Solutions Inc.In Stock: 6218SMP1321-011LF Datasheet

MFR RecommendedRFQ

SMP1352-011LF

Skyworks Solutions Inc.In Stock: 1875SMP1352-011LF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the BA591 is determined by the following critical parameters:

• Package compatibility: SOD-323 form factor
• Voltage rating: Minimum 35V peak reverse voltage
• Current handling: Minimum 100 mA capability
• Power dissipation: Minimum 500 mW rating
• Diode classification: RF diode functionality
• Compliance: ROHS3 and MSL-1 requirements

The substitute parts listed below meet these electrical and mechanical criteria, though some represent functional upgrades with enhanced specifications. The SMP1320-011LF and SMP1321-011LF are active products from Skyworks Solutions Inc., while 1SV307(TPH3,F) is an active product from Toshiba Semiconductor and Storage.

Parameter Comparison

Engineering Selection Recommendations

For applications requiring direct replacement of the obsolete BA591,135, the SMP1320-011LF from Skyworks Solutions Inc. is the primary substitute. It maintains SOD-323 packaging, exceeds the voltage rating at 50V, and provides equivalent operating temperature range (-65°C ~ 150°C). Both parts are ROHS3 compliant with MSL-1 ratings.

The 1SV307(TPH3,F) from Toshiba Semiconductor and Storage is an active alternative in SOD-323 packaging. However, its peak reverse voltage rating of 30V is below the BA591 specification of 35V, and its maximum current rating of 50 mA is half that of the original part. This substitute is suitable only for applications with reduced voltage and current requirements.

The SMP1321-011LF from Skyworks Solutions Inc. is available in SOT23 packaging rather than SOD-323, requiring PCB layout modifications. Detailed electrical specifications are not provided for this part.

All substitute parts maintain ROHS3 compliance and MSL-1 moisture sensitivity ratings consistent with the original BA591.

Frequently Asked Questions (FAQ)

Q: Can the 1SV307(TPH3,F) directly replace the BA591,135?

A: The 1SV307(TPH3,F) has a lower peak reverse voltage rating (30V versus 35V) and reduced maximum current (50 mA versus 100 mA). It is suitable only for applications operating within these reduced specifications.

Q: What is the primary advantage of the SMP1320-011LF as a substitute?

A: The SMP1320-011LF maintains the SOD-323 package form factor, exceeds the voltage rating at 50V, and is an active product with full availability. It supports the same operating temperature range as the BA591.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. The BA591, 1SV307(TPH3,F), SMP1320-011LF, and SMP1321-011LF are all ROHS3 compliant with MSL-1 moisture sensitivity ratings.

Q: Does the SMP1321-011LF require design changes?

A: Yes. The SMP1321-011LF uses SOT23 packaging instead of SOD-323, requiring PCB layout and footprint modifications.

Q: What is the key difference between the BA591 and SMP1320-011LF?

A: The BA591 is classified as a Standard diode type, while the SMP1320-011LF is a PIN diode type. Both are RF diodes in SOD-323 packaging. The SMP1320-011LF has a higher voltage rating (50V) and lower power dissipation (250 mW).