PVT312LS-T Solid State Relay SPST-NO Equivalent & Substitute Parts

Part Overview

The PVT312LS-T is a surface mount solid state relay (SSR) manufactured by Infineon Technologies, classified as SPST-NO (Single Pole Single Throw - Normally Open) with a 1 Form A circuit configuration. This component is rated for 170 mA load current at 0–250 V AC/DC output with a 1.2 VDC input trigger voltage. The part is currently listed as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	PVT312LS-T
Manufacturer	Infineon Technologies
Circuit Type	SPST-NO (1 Form A)
Output Type	AC, DC
Voltage - Input	1.2 VDC
Voltage - Load	0 V ~ 250 V
Load Current	170 mA
On-State Resistance (Max)	15 Ohms
Package / Case	6-SMD (0.300", 7.62mm)
Termination Style	Gull Wing
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level (MSL)	4 (72 Hours)

Substitute Part Grouping Explanation

Substitution eligibility for the PVT312LS-T is determined by the following critical parameters:

Circuit Configuration: SPST-NO (1 Form A) — all substitutes must maintain this switching topology
Load Voltage Range: 0 V ~ 250 V AC/DC — substitutes must support this full range
Input Trigger Voltage: 1.2 VDC nominal — substitutes with input voltages between 1.14 VDC and 1.37 VDC are functionally compatible
Load Current Capability: Minimum 170 mA — substitutes rated at 150 mA or higher satisfy this requirement
Package / Case: 6-SMD (0.300", 7.62mm) with Gull Wing termination — all substitutes use identical mechanical footprint
Mounting Type: Surface Mount — all substitutes are surface mount compatible

Substitute parts are grouped into two categories:

Category 1 — Direct Packaging Equivalents (Same Supplier Package)

PVT312LS-TPBF (Infineon, Tape & Reel packaging, Active status, RoHS3 compliant)

Category 2 — Functional Equivalents (Different Manufacturers, Active Status)

AQV253HA and AQV253HAZ (Panasonic PhotoMOS™ series, 200 mA rated, RoHS3 compliant)
CPC1510GS and CPC1510GSTR (IXYS OptoMOS® series, 200 mA rated, RoHS3 compliant)
LCA120LS and LCA120LSTR (IXYS OptoMOS® series, 150 mA rated, RoHS3 compliant)

Category 3 — Functional Equivalents (Obsolete Status)

ASSR-3211-501E (Broadcom ASSR series, 200 mA rated, obsolete status)

Parameter Comparison

Part Number	Manufacturer	Input Voltage (VDC)	Load Current (mA)	On-State Resistance (Ohms)	Load Voltage Range	Package	Product Status	RoHS Status	Packaging Type
PVT312LS-T	Infineon	1.2	170	15	0–250 V	6-SMD	Obsolete	Non-compliant	Bulk
PVT312LS-TPBF	Infineon	1.2	170	15	0–250 V	6-SMD	Active	RoHS3 Compliant	Tape & Reel
AQV253HA	Panasonic	1.14	200	8	0–250 V	6-SMD	Active	RoHS3 Compliant	Tube
AQV253HAZ	Panasonic	1.14	200	8	0–250 V	6-SMD	Active	RoHS Compliant	Tape & Reel
ASSR-3211-501E	Broadcom	1.3	200	10	0–250 V	6-SMD	Obsolete	RoHS3 Compliant	Cut Tape & Digi-Reel
CPC1510GS	IXYS	1.37	200	15	0–250 V	6-SMD	Active	RoHS3 Compliant	Tube
CPC1510GSTR	IXYS	1.37	200	15	0–250 V	6-SMD	Active	RoHS3 Compliant	Cut Tape & Digi-Reel
LCA120LS	IXYS	1.2	150	20	0–250 V	6-SMD	Active	RoHS3 Compliant	Tube
LCA120LSTR	IXYS	1.2	150	20	0–250 V	6-SMD	Active	RoHS3 Compliant	Tape & Reel

Engineering Selection Recommendations

Primary Recommendation: PVT312LS-TPBF

The PVT312LS-TPBF is the direct equivalent of the obsolete PVT312LS-T, offering identical electrical specifications and mechanical compatibility. This part is manufactured by Infineon (same OEM), maintains active product status, and achieves RoHS3 compliance. The only difference is packaging format (Tape & Reel vs. bulk), which does not affect circuit performance. This is the preferred choice for direct replacement in new designs and production runs.

Secondary Recommendations: Panasonic AQV253HA / AQV253HAZ

The Panasonic PhotoMOS™ AQV253 series provides superior performance characteristics with 200 mA load current capability (vs. 170 mA), lower on-state resistance (8 Ohms vs. 15 Ohms), and lower input trigger voltage (1.14 VDC vs. 1.2 VDC). Both variants are RoHS3 compliant and active products. The AQV253HAZ (Tape & Reel) is preferred for high-volume production; AQV253HA (Tube) is suitable for lower-volume applications.

Tertiary Recommendations: IXYS CPC1510GS / CPC1510GSTR

The IXYS OptoMOS® CPC1510 series maintains identical on-state resistance (15 Ohms) to the original part and supports 200 mA load current. Input trigger voltage is slightly elevated at 1.37 VDC. Both variants are RoHS3 compliant and active products. CPC1510GSTR (Cut Tape & Digi-Reel) is preferred for production; CPC1510GS (Tube) for lower volumes.

Alternative Recommendation: IXYS LCA120LS / LCA120LSTR

The IXYS OptoMOS® LCA120 series matches the original input voltage (1.2 VDC) but is rated for 150 mA load current (vs. 170 mA original specification). This part is suitable only for applications where the 150 mA rating is sufficient. On-state resistance is higher at 20 Ohms. Both variants are RoHS3 compliant and active products.

Not Recommended: ASSR-3211-501E

Although the Broadcom ASSR-3211-501E meets electrical specifications, it carries obsolete product status, limiting long-term availability and support. Preference should be given to active-status alternatives.

Frequently Asked Questions (FAQ)

Q: Can I use PVT312LS-TPBF as a direct replacement for PVT312LS-T?

A: Yes. PVT312LS-TPBF is electrically and mechanically identical to PVT312LS-T. The only difference is packaging format (Tape & Reel vs. bulk). Both use the same 6-SMD footprint with Gull Wing termination and are fully compatible on the PCB.

Q: What is the key difference between the Panasonic AQV253HA and AQV253HAZ?

A: Both parts are electrically identical. AQV253HA is supplied in Tube packaging; AQV253HAZ is supplied in Tape & Reel (TR) packaging. Select based on your procurement and assembly process requirements. Tape & Reel is standard for automated pick-and-place assembly.

Q: Can I substitute the PVT312LS-T with a part rated for 150 mA (LCA120LS)?

A: Only if your application's actual load current does not exceed 150 mA. The original PVT312LS-T is rated for 170 mA. If your circuit draws more than 150 mA, the LCA120LS will not provide adequate margin and should not be used.

Q: Why is the input voltage different across substitute parts?

A: Input trigger voltage varies by manufacturer design. The PVT312LS-T requires 1.2 VDC; substitutes range from 1.14 VDC to 1.37 VDC. All values are within acceptable tolerance for standard logic-level control circuits (3.3 V or 5 V outputs). Verify your control circuit can supply the required input voltage for your selected substitute.

Q: Are all substitute parts RoHS compliant?

A: Most active-status substitutes (PVT312LS-TPBF, AQV253HA, AQV253HAZ, CPC1510GS, CPC1510GSTR, LCA120LS, LCA120LSTR) are RoHS3 compliant. The original PVT312LS-T is RoHS non-compliant. The obsolete ASSR-3211-501E is RoHS3 compliant but not recommended due to obsolete status.

Q: What is the mechanical footprint compatibility?

A: All listed parts use the identical 6-SMD (0.300", 7.62mm) package with Gull Wing termination. No PCB layout changes are required for substitution. All parts are surface mount compatible with standard reflow soldering processes.

Q: Which substitute offers the best performance improvement?

A: The Panasonic AQV253 series provides the most significant performance gains: 200 mA load current (vs. 170 mA), 8 Ohms on-state resistance (vs. 15 Ohms), and 1.14 VDC input trigger voltage (vs. 1.2 VDC). These improvements reduce power dissipation and provide greater design margin.

Q: Can I mix different substitute parts in the same design?

A: Yes, provided all parts meet your circuit's electrical requirements. However, for production consistency and supply chain management, standardizing on a single substitute part number is recommended.

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