PS9601L Optoisolator 5KV Open Drain 8SMD - Equivalent & Substitute Parts

Part Overview

The PS9601L is a logic output optoisolator featuring 5000Vrms isolation voltage with open collector output configuration in 8-SMD surface mount packaging. Manufactured by CEL, this component is currently listed as obsolete, necessitating identification of functionally compatible alternatives for ongoing system requirements. The part supports 1 channel unidirectional optocoupling with 50 mA output current capability and operates across the standard industrial temperature range of -40°C to 85°C.

Substiute Parts

PS9601L

CELIn Stock: 3912PS9601L Datasheet

Current PartRFQ

6N137

onsemiIn Stock: 1082486N137 Datasheet

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6N137SMT&R

Isocom Components 2004 LTDIn Stock: 53976N137SMT&R Datasheet

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FOD260LS

onsemiIn Stock: 1375FOD260LS Datasheet

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FOD260LSD

onsemiIn Stock: 1463FOD260LSD Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the PS9601L is determined by strict adherence to the following key parameters: isolation voltage rating (5000Vrms minimum), output type (open collector), single-channel configuration, 50 mA output current capability, propagation delay matching (75ns maximum), and surface mount 8-SMD Gull Wing package format. Additional considerations include forward voltage characteristics, supply voltage range compatibility (4.5V ~ 5.5V), and operating temperature range coverage (-40°C ~ 85°C).

The substitute parts fall into two functional groups:

Group 1: Identical Electrical Configuration with RoHS3 Compliance The 6N137SMT&R and FOD series (FOD260LSD, FOD260LS) maintain 5000Vrms isolation voltage and open collector output type. These parts are marked as Active status with RoHS3 compliance, providing a clear migration path from the obsolete PS9601L.

Group 2: Lower Isolation Voltage Alternative The 6N137 (onsemi) offers 2500Vrms isolation voltage with open collector output, representing a downgrade in isolation rating but retaining compatible electrical behavior and 8-DIP package availability. This option suits applications where lower isolation voltage suffices.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (5000Vrms Isolation, Surface Mount) The 6N137SMT&R (Isocom) and FOD260 series (FOD260LSD, FOD260LS from onsemi) are the preferred substitutes for PS9601L replacement. All three are currently Active with RoHS3 compliance, addressing both obsolescence and regulatory requirements. The FOD260 variants include Schottky clamping for enhanced output switching performance. The 6N137SMT&R operates at 7V supply versus the standard 4.5V–5.5V of the original, requiring circuit validation. FOD260 parts support supply voltage range 3V–5.5V, providing superior supply flexibility.

Secondary Substitute (Through Hole Alternative) The 6N137 from onsemi operates at reduced isolation voltage (2500Vrms) and requires through-hole mounting. Selection of this part is restricted to applications where lower isolation voltage is acceptable and PCB layout permits through-hole component substitution.

Compliance Note The PS9601L RoHS non-compliant status makes migration to RoHS3-compliant substitutes necessary for supply chain continuity in regulated markets.

Frequently Asked Questions (FAQ)

Q: Can FOD260LSD and FOD260LS be used interchangeably as PS9601L substitutes? Both FOD260LSD and FOD260LS meet identical electrical specifications and 8-SMD Gull Wing package requirements. The primary difference is packaging format: FOD260LSD is supplied in Tape & Reel while FOD260LS is supplied in Tube. Component selection depends on procurement and assembly process requirements.

Q: What is the impact of Schottky clamping in FOD260 parts compared to PS9601L? Schottky clamping is an additional output stage feature that reduces output rise and fall times (22ns/3ns versus PS9601L typical 20ns/10ns). This improves switching performance and is a functional upgrade with no negative impact on compatibility.

Q: Is the 6N137SMT&R suitable for direct board-level substitution? The 6N137SMT&R maintains 8-SMD Gull Wing packaging compatible with PS9601L footprints. The circuit must accommodate 7V supply operation instead of standard 4.5V–5.5V range. Verify supply rail availability or employ voltage regulation to support this requirement.

Q: Why does FOD260 support wider supply voltage range (3V–5.5V) compared to PS9601L (4.5V–5.5V)? FOD260 parts are designed for extended low-voltage application support. This wider specification range is a design advantage with no operational penalty when operating within PS9601L's original 4.5V–5.5V range.

Q: When should the 6N137 be selected over 6N137SMT&R or FOD260? The 6N137 (2500Vrms isolation) is selected only when application isolation voltage requirement is 2500Vrms or lower. This part is through-hole mounted and must be evaluated for PCB layout feasibility. The part is listed as Obsolete, limiting new design applications.

Q: Are propagation delays between FOD260 and PS9601L compatible? FOD260 maximum propagation delays are 90ns (tpLH) and 75ns (tpHL) versus PS9601L 75ns for both. The 15ns increase in tpLH may impact timing-critical applications. Verify system timing margins before deployment in high-speed switching circuits.