PVT312 Solid State Relay - Equivalent & Substitute Parts

Part Overview

The PVT312 is a solid state relay (SSR) manufactured by Infineon Technologies, configured as a SPST-NO (Single Pole Single Throw - Normally Open) switching device in a 6-DIP through-hole package. The device is rated for 190 mA load current at 0–250 V AC/DC output with a 1.2 VDC input trigger voltage and 10 Ohms maximum on-state resistance.

The PVT312 is classified as obsolete. Equivalent and substitute parts are necessary to maintain design continuity and ensure component availability for new production runs, repairs, and system upgrades. Substitute parts must maintain functional compatibility across input voltage, load voltage range, load current capacity, and package form factor.

Substiute Parts

PVT312

Infineon TechnologiesIn Stock: 2444PVT312 Datasheet

Current PartRFQ

PVT312PBF

International RectifierIn Stock: 5247PVT312PBF Datasheet

DirectRFQ

AQV203

Panasonic Electric WorksIn Stock: 6479AQV203 Datasheet

DirectRFQ

AQV217

Panasonic Electric WorksIn Stock: 3143AQV217 Datasheet

DirectRFQ

AQV257

Panasonic Electric WorksIn Stock: 3232AQV257 Datasheet

DirectRFQ

AQV103

Panasonic Electric WorksIn Stock: 3068AQV103 Datasheet

MFR RecommendedRFQ

LH1510AABTR

Vishay Semiconductor Opto DivisionIn Stock: 5312LH1510AABTR Datasheet

MFR RecommendedRFQ

LH1510AT

Vishay Semiconductor Opto DivisionIn Stock: 2122LH1510AT Datasheet

MFR RecommendedRFQ

LH1518AT

Vishay Semiconductor Opto DivisionIn Stock: 1857LH1518AT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PVT312 is determined by the following critical parameters:

Primary Compatibility Criteria:

• Circuit configuration: SPST-NO (1 Form A) topology
• Package form factor: 6-DIP (0.300", 7.62mm) for through-hole mounting with PC pin termination
• Load voltage range: Minimum 250 V capability (or 200 V for reduced-voltage applications)
• Load current capacity: Minimum 190 mA
• Input trigger voltage: Nominal 1.2–2.3 VDC range
• Output type: AC/DC switching capability

Substitution Logic: Parts are grouped into two categories based on mounting compatibility:

1. Direct Through-Hole Substitutes – Maintain identical 6-DIP package, PC pin termination, and through-hole mounting. These provide pin-for-pin or functionally equivalent replacement without PCB redesign.

2. Surface Mount Alternatives – Offer equivalent electrical performance in 6-SMD package with gull wing termination. These require PCB layout modification but provide active product status and modern compliance certifications.

Load current and on-state resistance are evaluated for application headroom. Parts with load current ≥190 mA and on-state resistance ≤15 Ohms are considered direct functional equivalents. Parts with higher on-state resistance or lower current ratings are listed as alternatives for reduced-load applications.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute – AQV203 (Panasonic Electric Works)

AQV203 is the closest functional equivalent to PVT312. It maintains 6-DIP through-hole package compatibility, supports 0–250 V load voltage range, and provides 200 mA load current with 8 Ohms on-state resistance. The device is active in production and ROHS3 compliant, addressing obsolescence and regulatory requirements. Input voltage of 2.3 VDC is within acceptable trigger range for most applications.

Secondary Substitute – LH1510AT (Vishay Semiconductor Opto Division)

LH1510AT provides through-hole 6-DIP compatibility with active product status and ROHS3 compliance. Load current is 200 mA with 15 Ohms on-state resistance. Load voltage range is 0–200 V, suitable for applications not requiring full 250 V capability. Input voltage of 1.27 VDC closely matches the PVT312 specification.

Higher Current Alternative – LH1518AT (Vishay Semiconductor Opto Division)

LH1518AT supports 300 mA load current and 0–250 V load voltage range in 6-DIP through-hole package. On-state resistance is 20 Ohms. This part is suitable for applications requiring higher current capacity than the original PVT312 specification. Product is active and ROHS3 compliant.

Higher Current Alternative – AQV103 (Panasonic Electric Works)

AQV103 provides 300 mA load current capacity with 4 Ohms on-state resistance and 0–250 V load voltage range. Output type is DC only, limiting use to DC switching applications. Part is active and ROHS3 compliant.

Surface Mount Option – LH1510AABTR (Vishay Semiconductor Opto Division)

For new designs permitting PCB layout modification, LH1510AABTR offers 6-SMD surface mount package with equivalent electrical performance to LH1510AT. Active product status and ROHS3 compliance are provided.

Frequently Asked Questions (FAQ)

Q: Can AQV203 replace PVT312 in existing PCB designs without modification?

A: Yes. AQV203 maintains identical 6-DIP through-hole package, PC pin termination, and pin spacing. No PCB redesign is required. Input voltage tolerance (2.3 VDC vs. 1.2 VDC) must be verified against circuit design, but both values fall within standard logic-level trigger ranges.

Q: What is the difference between AQV217 and AQV257?

A: Both are Panasonic PhotoMOS™ AQV series devices in 6-DIP through-hole package. AQV217 is rated for 180 mA at 0–200 V with 15 Ohms on-state resistance. AQV257 is rated for 250 mA at 0–200 V with 4 Ohms on-state resistance. AQV257 provides higher current capacity and lower resistance but is limited to 200 V load voltage. Selection depends on application current and voltage requirements.

Q: Why does AQV103 specify DC output only while PVT312 supports AC/DC?

A: AQV103 is optimized for DC switching applications and is rated for DC output type only. Applications requiring AC switching capability must use parts explicitly rated for AC/DC output, such as AQV203, LH1510AT, or LH1518AT.

Q: Is LH1510AABTR a direct replacement for through-hole designs?

A: No. LH1510AABTR uses 6-SMD surface mount package with gull wing termination, requiring PCB layout redesign. LH1510AT is the through-hole equivalent of LH1510AABTR and provides direct PCB compatibility.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. ROHS3 compliant parts are required for many industrial and consumer applications. PVT312 is RoHS non-compliant; all recommended substitutes are ROHS3 compliant or RoHS compliant.

Q: Can I use LH1518AT if my application only requires 190 mA?

A: Yes. LH1518AT is rated for 300 mA maximum load current, so 190 mA operation is within specification. The higher on-state resistance (20 Ohms vs. 10 Ohms for PVT312) must be evaluated for thermal and voltage drop considerations in the specific circuit design.

Q: What is the significance of on-state resistance in SSR selection?

A: On-state resistance determines voltage drop across the relay during conduction and affects heat dissipation. Lower resistance reduces voltage drop and power loss. When substituting parts, verify that the substitute's on-state resistance does not exceed application thermal and voltage drop limits. AQV203 (8 Ohms) and AQV257 (4 Ohms) offer lower resistance than PVT312 (10 Ohms), improving efficiency.