ISP321-4 Equivalent & Substitute Parts

Part Overview

The ISP321-4 is a quad-channel optoisolator with transistor output manufactured by Isocom Components 2004 LTD. This 16-DIP through-hole component provides galvanic isolation up to 5300Vrms across four independent channels, each capable of 50mA output current. The part is currently active in production with 2036 units in stock. Substitute parts are identified when identical electrical and mechanical parameters are maintained, ensuring direct compatibility in existing circuit designs without redesign requirements.

Substiute Parts

ISP321-4

Isocom Components 2004 LTDIn Stock: 2130ISP321-4 Datasheet

Current PartRFQ

ISP321-4X

Isocom Components 2004 LTDIn Stock: 818ISP321-4X Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

The ISP321-4X qualifies as a parametric equivalent substitute based on identical electrical and mechanical specifications. Substitution criteria are determined by the following parameters:

• Isolation voltage: 5300Vrms
• Channel count: 4 channels
• Output type: Transistor
• Maximum output current per channel: 50mA
• Maximum output voltage: 80V
• Current transfer ratio range: 50% to 600% @ 5mA
• Package type: 16-DIP (0.300", 7.62mm)
• Mounting configuration: Through Hole
• Operating temperature range: -30°C ~ 100°C
• Vce saturation: 400mV maximum

The ISP321-4X maintains all specified parameters without deviation, confirming direct functional and mechanical compatibility.

Parameter Comparison

Engineering Selection Recommendations

Both ISP321-4 and ISP321-4X are active production parts with ROHS3 compliance and REACH unaffected status. The ISP321-4 has higher inventory availability (2036 units) compared to ISP321-4X (765 units). Selection between these parts should be based on supply chain requirements and lead time considerations. Both parts meet identical electrical specifications and regulatory requirements for applications requiring quad-channel optoisolation at 5300Vrms isolation voltage with transistor output configuration.

Frequently Asked Questions (FAQ)

Q: Can ISP321-4X be used as a direct replacement for ISP321-4?

A: Yes. The ISP321-4X maintains identical electrical parameters, channel configuration, isolation voltage, output current rating, and 16-DIP package specifications. No circuit modifications are required.

Q: Are there differences in isolation voltage between these parts?

A: No. Both parts provide 5300Vrms isolation voltage across all four channels.

Q: Do these parts have the same current transfer ratio specifications?

A: Yes. Both parts specify a current transfer ratio range of 50% to 600% @ 5mA, with identical rise and fall times of 4µs and 3µs respectively.

Q: Is the 16-DIP package identical for both parts?

A: Yes. Both parts use the same 16-DIP (0.300", 7.62mm) through-hole package with identical pin configuration and mechanical dimensions.

Q: Are there compliance or certification differences?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.49.8000).

Q: What is the maximum output current per channel?

A: Both parts support 50mA maximum output current per channel with a maximum output voltage of 80V and Vce saturation of 400mV.

Q: Do these parts operate across the same temperature range?

A: Yes. Both parts operate from -30°C to 100°C.