PVT322A Solid State Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The PVT322A is a solid state relay (SSR) manufactured by Infineon Technologies, classified as SPST-NO (Single Pole Single Throw - Normally Open) with dual Form A circuits in an 8-DIP through-hole package. This component is rated for 170 mA load current at 0–250 V AC/DC operation with 1.2 VDC input control voltage. The product is currently obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations where legacy compatibility is required.

Substiute Parts

PVT322A

Infineon TechnologiesIn Stock: 1206PVT322A Datasheet

Current PartRFQ

PAA150

IXYS Integrated Circuits DivisionIn Stock: 1467PAA150 Datasheet

DirectRFQ

AQW215

Panasonic Electric WorksIn Stock: 1557AQW215 Datasheet

MFR RecommendedRFQ

AQW217

Panasonic Electric WorksIn Stock: 1208AQW217 Datasheet

MFR RecommendedRFQ

LAA120

IXYS Integrated Circuits DivisionIn Stock: 2320LAA120 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PVT322A is determined by the following critical parameters:

• Package compatibility: All substitutes must use 8-DIP (0.300", 7.62mm) through-hole packaging with PC pin termination
• Circuit configuration: SPST-NO (1 Form A) x 2 dual-channel architecture required
• Input voltage: 1.2 VDC control voltage (tolerance range: 1.14–1.2 VDC acceptable)
• Load voltage range: Minimum 0–250 V capability required
• Output type: AC and DC switching capability required
• Load current: Minimum 170 mA at rated load voltage
• On-state resistance: Lower values indicate improved performance; maximum 20 Ohms acceptable for functional equivalence

Substitutes are grouped into two categories: direct electrical equivalents (matching all primary parameters) and functional alternatives (meeting minimum performance thresholds with enhanced specifications).

Parameter Comparison

Engineering Selection Recommendations

PAA150 (IXYS): Direct functional equivalent with enhanced load current capacity (250 mA vs. 170 mA) and improved on-state resistance (7 Ohms vs. 8 Ohms). Maintains identical input voltage (1.2 VDC) and load voltage range (0–250 V). Active product status with ROHS3 compliance. Suitable for direct replacement in applications requiring full voltage and current headroom.

AQW215 (Panasonic): Enhanced performance substitute with superior on-state resistance (4 Ohms) and higher load current rating (300 mA). Load voltage range limited to 0–100 V, restricting use to applications operating below 100 V. Active product status with ROHS3 compliance. Input voltage compatible (1.14 VDC). Applicable only where load voltage does not exceed 100 V.

AQW217 (Panasonic): Functional substitute with load voltage range of 0–200 V and load current of 160 mA (marginally below PVT322A specification). On-state resistance of 15 Ohms represents degraded performance compared to the main part. Input voltage compatible (1.14 VDC). Active product status with RoHS compliance. Suitable for applications operating at or below 200 V where slightly reduced on-state resistance is acceptable.

LAA120 (IXYS): Exact electrical match for load current (170 mA) and load voltage range (0–250 V) with identical input voltage (1.2 VDC). On-state resistance of 20 Ohms represents performance degradation. Active product status with ROHS3 compliance. Provides functional equivalence with higher resistance characteristics; suitable where resistance tolerance permits.

Frequently Asked Questions (FAQ)

Q: Can PAA150 be used as a direct replacement for PVT322A?

A: Yes. PAA150 meets all critical substitution parameters: identical 8-DIP package, SPST-NO x 2 configuration, 1.2 VDC input, 0–250 V load voltage, and exceeds the 170 mA load current requirement. Enhanced specifications (250 mA, 7 Ohms) provide additional performance margin.

Q: Why is AQW215 limited to 100 V load voltage?

A: AQW215 is specified with a maximum load voltage of 0–100 V, compared to PVT322A's 0–250 V rating. This is a fundamental design parameter of the AQW215 device. Use AQW215 only in applications where load voltage remains at or below 100 V.

Q: What is the significance of on-state resistance differences?

A: On-state resistance affects power dissipation and voltage drop across the relay contacts during conduction. Lower resistance (PAA150 at 7 Ohms, AQW215 at 4 Ohms) reduces heat generation and voltage drop. Higher resistance (LAA120 at 20 Ohms, AQW217 at 15 Ohms) increases both. Select based on thermal and voltage drop requirements of the application.

Q: Are all substitutes RoHS compliant?

A: All substitute parts (PAA150, AQW215, AQW217, LAA120) are RoHS compliant. The original PVT322A is RoHS non-compliant. Compliance status should be verified against system-level regulatory requirements.

Q: Can substitutes be used interchangeably in existing PCB designs?

A: Yes, all substitutes use identical 8-DIP (0.300", 7.62mm) through-hole packaging with PC pin termination. Pin-for-pin compatibility is maintained across all parts. Electrical parameter differences must be evaluated against application requirements.

Q: Which substitute offers the best overall performance?

A: PAA150 provides the most comprehensive performance upgrade: enhanced load current (250 mA), improved on-state resistance (7 Ohms), full voltage range (0–250 V), and active product status with ROHS3 compliance. Selection should prioritize application-specific requirements over general performance metrics.