PVT322 Solid State Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The PVT322 is a solid state relay (SSR) manufactured by Infineon Technologies, configured as a SPST-NO (Single Pole Single Throw - Normally Open) relay with dual channels in an 8-DIP through-hole package. The device is rated for 170 mA load current at 0–250 V AC/DC output with 1.2 VDC input control voltage. The PVT322 is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	PVT322
Manufacturer	Infineon Technologies
Circuit Configuration	SPST-NO (1 Form A) x 2
Package / Case	8-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Voltage - Input	1.2 VDC
Voltage - Load	0 V ~ 250 V
Load Current	170 mA
On-State Resistance (Max)	10 Ohms
Output Type	AC, DC
Termination Style	PC Pin
Product Status	Obsolete
RoHS Status	RoHS non-compliant

Substitute Part Grouping Explanation

Substitution of the PVT322 is determined by the following critical parameters:

Primary Matching Criteria:

Circuit configuration: SPST-NO (1 Form A) x 2
Package type: 8-DIP (0.300", 7.62mm)
Mounting type: Through Hole
Termination style: PC Pin
Input voltage: 1.2 VDC nominal
Output voltage range: 0 V ~ 250 V
Load current capability: minimum 170 mA
On-state resistance: maximum 10 Ohms

Substitution Categories:

Direct Equivalents – Parts meeting all primary criteria with identical or superior electrical performance:

LAA120 (IXYS) – Exact match on all parameters
LAA127L (Littelfuse) – Exact match on all parameters

Compatible Alternatives – Parts with same package and circuit configuration but with trade-offs in load current or on-state resistance:

LAA120L (IXYS) – Reduced load current (150 mA) but same voltage rating
LAA127 (IXYS) – Enhanced load current (200 mA) and same voltage rating
LH1505AB (Vishay) – Reduced load current (120 mA) but same voltage rating
LH1522AB (Vishay) – Reduced load current (120 mA) and reduced voltage rating (0–200 V)

Limited Compatibility – Parts with same package but different circuit configurations or significantly reduced voltage ratings:

AQW217 (Panasonic) – Reduced load current (160 mA) and voltage rating (0–200 V)
AQW215 (Panasonic) – Higher load current (300 mA) but significantly reduced voltage rating (0–100 V)
AQW612EH (Panasonic) – Different circuit (SPST-NO + SPST-NC), higher load current (500 mA), but reduced voltage rating (0–60 V)

Manufacturer Variant:

PVT322PBF (International Rectifier) – Manufacturer variant of the original part

Parameter Comparison

Part Number	Manufacturer	Circuit	Input Voltage	Load Voltage	Load Current	On-State Resistance (Max)	Package	Product Status	RoHS Status
PVT322	Infineon	SPST-NO x 2	1.2 VDC	0–250 V	170 mA	10 Ω	8-DIP	Obsolete	Non-compliant
PVT322PBF	International Rectifier	SPST-NO x 2	—	—	—	—	8-DIP	Active	—
LAA120	IXYS	SPST-NO x 2	1.2 VDC	0–250 V	170 mA	20 Ω	8-DIP	Active	ROHS3 Compliant
LAA120L	IXYS	SPST-NO x 2	1.2 VDC	0–250 V	150 mA	25 Ω	8-DIP	Active	ROHS3 Compliant
LAA127	IXYS	SPST-NO x 2	1.2 VDC	0–250 V	200 mA	10 Ω	8-DIP	Active	ROHS3 Compliant
LAA127L	Littelfuse	SPST-NO x 2	1.2 VDC	0–250 V	170 mA	15 Ω	8-DIP	Active	ROHS3 Compliant
LH1505AB	Vishay	SPST-NO x 2	1.26 VDC	0–250 V	120 mA	15 Ω	8-DIP	Active	ROHS3 Compliant
LH1522AB	Vishay	SPST-NO x 2	1.26 VDC	0–200 V	120 mA	10 Ω	8-DIP	Active	ROHS3 Compliant
AQW217	Panasonic	SPST-NO x 2	1.14 VDC	0–200 V	160 mA	15 Ω	8-DIP	Active	ROHS3 Compliant
AQW215	Panasonic	SPST-NO x 2	1.14 VDC	0–100 V	300 mA	4 Ω	8-DIP	Active	ROHS3 Compliant
AQW612EH	Panasonic	SPST-NO + SPST-NC	1.14 VDC	0–60 V	500 mA	2.5 Ω	8-DIP	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Obsolete to Active):

LAA127 (IXYS) is the preferred direct substitute. It maintains identical input voltage (1.2 VDC), load voltage range (0–250 V), and circuit configuration (SPST-NO x 2) while exceeding the load current specification (200 mA vs. 170 mA required). On-state resistance matches the original specification at 10 Ohms maximum. The part is ROHS3 compliant and carries active product status with established supply availability.

LAA120 (IXYS) provides an alternative direct substitute with matching electrical specifications (1.2 VDC input, 0–250 V load, 170 mA current) and identical circuit configuration. On-state resistance is 20 Ohms, which exceeds the original 10 Ohm specification but remains within acceptable operating margins for most applications. ROHS3 compliance and active status support long-term availability.

LAA127L (Littelfuse) offers equivalent performance to the original PVT322 with identical input voltage, load voltage range, and load current (170 mA). On-state resistance is 15 Ohms. ROHS3 compliance and active product status ensure supply continuity.

For Voltage-Constrained Applications:

LH1522AB (Vishay) is suitable for applications where load voltage does not exceed 200 V. The part maintains the same circuit configuration and input voltage (1.26 VDC) with reduced load current capability (120 mA). ROHS3 compliance and high inventory availability support production requirements.

For Current-Limited Applications:

AQW217 (Panasonic) accommodates applications with load voltage limited to 200 V and load current requirements of 160 mA or less. Input voltage is 1.14 VDC. ROHS3 compliance is confirmed.

Not Recommended for Direct Substitution:

AQW215 and AQW612EH are not suitable direct replacements due to significantly reduced load voltage ratings (100 V and 60 V respectively), which fall below the original 250 V specification. These parts are applicable only to applications with inherently lower voltage requirements.

Frequently Asked Questions (FAQ)

Q: Can LAA120 replace PVT322 in all applications?

A: LAA120 is electrically compatible with PVT322 for applications requiring 170 mA load current at 0–250 V. The on-state resistance specification (20 Ohms vs. 10 Ohms) is higher but acceptable for most switching applications. Verify that the increased resistance does not impact voltage drop or thermal performance in your specific circuit.

Q: What is the difference between LAA127 and LAA127L?

A: LAA127 is manufactured by IXYS; LAA127L is manufactured by Littelfuse. Both parts share identical electrical specifications (1.2 VDC input, 0–250 V load, 170 mA current, 15 Ohms on-state resistance) and the same 8-DIP package. Selection depends on supplier availability and procurement preferences.

Q: Why is LH1522AB rated for only 200 V when PVT322 supports 250 V?

A: LH1522AB is a different product line (Vishay LH1522 series) with a maximum load voltage specification of 200 V. This part is suitable only for applications where the load voltage does not exceed 200 V. For applications requiring the full 250 V range, use LAA127, LAA120, or LAA127L.

Q: Are all substitute parts RoHS compliant?

A: All active substitute parts listed (LAA120, LAA120L, LAA127, LAA127L, LH1505AB, LH1522AB, AQW217, AQW215, AQW612EH) are ROHS3 compliant. The original PVT322 is RoHS non-compliant. Compliance with RoHS regulations may be a requirement for new designs or production transitions.

Q: Can I use AQW215 as a substitute for PVT322?

A: AQW215 is not a suitable direct substitute. Although it shares the same 8-DIP package and SPST-NO x 2 circuit configuration, the maximum load voltage is limited to 100 V, which is significantly below the PVT322 specification of 250 V. Use AQW215 only in applications where the load voltage does not exceed 100 V.

Q: What is the significance of the input voltage differences (1.2 VDC vs. 1.14 VDC vs. 1.26 VDC)?

A: Input voltage specifications define the control signal required to activate the relay. The PVT322 requires 1.2 VDC. Panasonic parts (AQW217, AQW215, AQW612EH) require 1.14 VDC, and Vishay parts (LH1505AB, LH1522AB) require 1.26 VDC. These differences are minor and typically accommodated by standard logic-level control circuits. Verify that your control circuit can supply the required input voltage for the selected substitute.

Q: Is PVT322PBF a direct equivalent to PVT322?

A: PVT322PBF is a manufacturer variant produced by International Rectifier. It represents the same product line as the Infineon PVT322 with active product status. Detailed electrical specifications for PVT322PBF are not provided in the available data; contact the manufacturer for complete parameter confirmation before substitution.

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