Vishay Semiconductor Opto Division VOR1121A6

Overview

VOR1121A6 from Vishay Semiconductors is a 250 V, 200 mA AC/DC-capable normally open solid-state relay (SPST, Form A) with optically isolated hybrid architecture, GaAlAs IRED input, and MOSFET output stage. It delivers 12 Ω typical on-resistance, 5300 VRMS isolation, and operates across –40 °C to +100 °C ambient for telecom switching and industrial control applications.

For engineers reviewing the VOR1121A6 datasheet, VOR1121A6 pinout, VOR1121A6 application, or VOR1121A6 equivalent, this page provides verified technical context, real-world switching performance data, safety-rated insulation metrics, and validated alternative options for design-in and BOM continuity planning.

Technical Context

The VOR1121A6 integrates an infrared LED input stage coupled via optical isolation to a high-performance MOSFET output switch, enabling bounce-free DC/AC load control without mechanical wear. Its hybrid construction supports fast turn-on (0.20 ms typ.) and turn-off (0.03 ms typ.) times under 5 mA drive current.

It complies with UL 1577 (5300 VRMS), DIN EN 60747-5-5 (VDE 0884), and achieves 7 mm creepage/clearance in DIP-6 package. Safety parameters include 8000 Vpeak transient isolation voltage, 10¹² Ω minimum insulation resistance at 25 °C, and 720 mW output safety power rating.

Key Specifications

Pinout & Package

DIP-6 through-hole package with 2.54 mm lead pitch, 7.25 mm body width, and ≥7 mm creepage/clearance per safety standards. Pin 1 marked with notch or dot.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar solid-state relay applications.

Compared with VOR1121A6, VOR1121B6 offers identical performance in a surface-mount package for volume production, while IXYS CPC1976Y trades isolation strength and temperature range for legacy footprint compatibility-neither is pin-compatible, and layout changes are required for either substitution.

Availability

VOR1121A6 is available at Aetrix Electronics and suitable for telecom switching, industrial security panels, smart metering, and battery management systems requiring stable component supply, long-term lifecycle support, and safety-certified isolation.

Supply support for VOR1121A6 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Semiconductors is a global leader in discrete semiconductors and passive components, specializing in high-reliability optoelectronics, power MOSFETs, and precision resistors for industrial and automotive markets.

The VOR1121 series was designed as a high-isolation, low-drive solid-state relay family targeting replacement of electromechanical relays in safety-critical instrumentation, metering, and telecom infrastructure.

FAQ

What is the maximum continuous load current rating for VOR1121A6 in AC/DC operation?

The VOR1121A6 is rated for 200 mA continuous load current in AC/DC configuration, as specified in the Absolute Maximum Ratings table. This rating applies across its full –40 °C to +100 °C ambient operating range and assumes proper PCB thermal management. Exceeding this current may cause thermal runaway or reduced lifetime, especially above 85 °C ambient.

Does VOR1121A6 support both AC and DC load switching in the same configuration?

Yes, VOR1121A6 supports both AC and DC loads in its AC/DC configuration using pins 4, 5, and 6 as defined in the datasheet's Fig. 1. In this mode, it switches bidirectional current up to 250 V and 200 mA. For DC-only use, pins 4 and 5 form a unidirectional path with lower 3.2 Ω typical R_ON, but pin 6 remains unconnected.

What safety certifications does VOR1121A6 hold, and how do they apply to system design?

VOR1121A6 is certified to UL 1577 (5300 VRMS), cUL, and DIN EN 60747-5-5 (VDE 0884). These approvals validate its reinforced insulation barrier for functional and basic isolation in end equipment. System designers must ensure creepage/clearance distances on the PCB match the device's ≥7 mm rating and implement protective circuits per IEC 60747-5-5 §7.4.3.8.2.

Can VOR1121A6 be driven directly from a 3.3 V microcontroller GPIO?

Yes, VOR1121A6 can be driven directly from a 3.3 V MCU GPIO. Its typical turn-on forward current is only 0.4 mA at 25 °C, and VF is 1.4 V typ. at 10 mA. With a 3.3 V supply and a 2.2 kΩ series resistor, IF ≈ 0.86 mA - well within safe limits and sufficient for reliable turn-on across temperature. No external transistor buffer is needed.

How does the on-resistance of VOR1121A6 vary with temperature and load current?

VOR1121A6 exhibits normalized on-resistance of ~1.0 at 25 °C, rising to ~1.6 at +100 °C (Fig. 9). At 100 mA load, R_ON is 3.2 Ω typ. in DC-only mode; at 50 mA, it is 12 Ω typ. in AC/DC mode. Designers should calculate worst-case conduction loss using max R_ON (15 Ω) and derated current at elevated temperatures to ensure thermal stability.