Vishay Siliconix SST174-E3 Equivalent & Substitute Parts Reference

Part Overview

The Vishay Siliconix SST174-E3 is a P-Channel Junction Field Effect Transistor (JFET), categorized under Surface Mount Transistors, and supplied in a TO-236-3 (SOT-23-3, SC-59) package. It features a 30 V breakdown voltage, 20 mA drain current (@ Vgs=0, Vds=15 V), and a maximum power dissipation of 350 mW. The part is designated as Obsolete, necessitating identification of suitable alternatives to support ongoing manufacturing and maintenance requirements for applications originally designed around SST174-E3.

Substiute Parts

SST174-E3

Vishay SiliconixIn Stock: 810SST174-E3 Datasheet

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MMBFJ176

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MMBFJ270

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DirectRFQ

MMBFJ175LT1G

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MMBFJ175LT3G

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MMBFJ177LT1G

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Key Parameters

Substitute Part Grouping Explanation

Substitution of SST174-E3 is governed strictly by parameters relevant to electrical and mechanical equivalence within the JFET P-Channel Surface Mount Transistor category:

• FET Type: P-Channel
• Voltage - Breakdown (V(BR)GSS): 30 V
• Mounting Type: Surface Mount
• Package / Case: TO-236-3, SC-59, SOT-23-3
• Operating Temperature: -55°C ~ 150°C (TJ)
• Compliance: RoHS3, REACH, MSL 1

These constitute the minimum set of matching criteria for compatibility in form factor, voltage rating, and regulatory compliance for direct substitution.

Parameter Comparison

Engineering Selection Recommendations

All listed substitute transistors are ROHS3 Compliant, REACH Unaffected, and possess Moisture Sensitivity Level 1 (Unlimited), matching the environmental and certification standards of the SST174-E3. The product status of SST174-E3 is Obsolete; substitute selections should use only parts listed as “Active” to ensure ongoing supply chain support.

Frequently Asked Questions (FAQ)

Q1: What parameters must match to substitute the SST174-E3?
A1: Substitution requires matching FET Type, Voltage - Breakdown (V(BR)GSS), Mounting Type, Package / Case, Operating Temperature, RoHS/REACH compliance, and Moisture Sensitivity Level.

Q2: Are substitute parts compatible with the same footprint?
A2: All listed substitutes share the TO-236-3, SC-59, SOT-23-3 package/case suitable for Surface Mount assembly, supporting drop-in compatibility in PCB layouts designed for SST174-E3.

Q3: Is there any difference in compliance or environmental standards among substitutes?
A3: All substitutes meet ROHS3, REACH, and MSL 1 standards, identical to SST174-E3.

Q4: What is the main reason to use substitute parts for SST174-E3?
A4: The SST174-E3 is an Obsolete part; substitutes ensure continued product support and manufacturing using active and available P-Channel JFET transistors.

Q5: Are all electrical parameters identical?
A5: Electrical parameters such as Current - Drain (Idss), Voltage - Cutoff (VGS off), Resistance - RDS(On), and Power - Max may differ. Substitution is contingent upon system requirements tolerating parameter variance and matching key allowed criteria.