4N37S(TA)-V Equivalent & Substitute Parts

Part Overview

The 4N37S(TA)-V is an optoisolator transistor with base output manufactured by Everlight Electronics Co Ltd. This single-channel device provides 5000Vrms isolation voltage and is designed for DC input applications requiring transistor output with base access. The component is actively produced and RoHS3 compliant, packaged in 6-SMD surface mount configuration.

Substitute parts are identified when equivalent electrical and mechanical parameters align with application requirements. Alternative models may be necessary due to inventory availability, packaging format preferences, or specific isolation voltage and output voltage specifications for target applications.

Substiute Parts

4N37S(TA)-V

Everlight Electronics Co LtdIn Stock: 10494N37S(TA)-V Datasheet

Current PartRFQ

4N37S-TA1

Lite-On Inc.In Stock: 220534N37S-TA1 Datasheet

SimilarRFQ

4N37SM

onsemiIn Stock: 127594N37SM Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 4N37S(TA)-V is determined by the following critical parameters:

Mandatory Matching Parameters:

• Number of Channels: 1
• Input Type: DC
• Output Type: Transistor with Base
• Package / Case: 6-SMD, Gull Wing
• Mounting Type: Surface Mount
• Current Transfer Ratio (Min): 100% @ 10mA
• Voltage - Forward (Vf) (Typ): 1.2V
• Current - DC Forward (If) (Max): 60 mA
• Vce Saturation (Max): 300mV

Allowable Variation Parameters:

• Voltage - Isolation: Substitute must meet or exceed application isolation requirements
• Voltage - Output (Max): Substitute must support target circuit voltage levels
• Operating Temperature: Substitute range must encompass application operating conditions
• Turn On / Turn Off Time: Timing specifications may vary within application tolerance
• Product Status: Active status required for production use

The identified substitute parts 4N37S-TA1 and 4N37SM maintain core functional equivalence through matching channel count, input/output configuration, and base electrical characteristics while differing in isolation voltage ratings and maximum output voltage specifications.

Parameter Comparison

Engineering Selection Recommendations

4N37S-TA1 (Lite-On Inc.): This substitute is suitable for applications where isolation voltage requirements do not exceed 1500Vrms and maximum output voltage does not exceed 30V. The lower isolation rating and reduced output voltage capability represent functional limitations compared to the main part. All three components maintain identical current transfer ratio, forward voltage, forward current, and saturation voltage specifications. RoHS3 compliance and MSL 1 rating match the main part. Product status is Active.

4N37SM (onsemi): This substitute provides 4170Vrms isolation voltage, which approaches the main part specification of 5000Vrms. Maximum output voltage is limited to 30V compared to 80V on the main part. The onsemi device demonstrates faster switching performance with 2µs turn-on and turn-off times versus 10µs and 9µs on the main part. Operating temperature range is -40°C to 100°C, which is narrower than the main part range of -55°C to 110°C. RoHS3 compliance and MSL 1 rating are maintained. Product status is Active.

All three parts maintain identical core electrical characteristics: 100% current transfer ratio at 10mA, 1.2V typical forward voltage, 60mA maximum forward current, and 300mV maximum Vce saturation. All are packaged in 6-SMD Gull Wing surface mount configuration and are RoHS3 compliant with unlimited moisture sensitivity.

Frequently Asked Questions (FAQ)

Q: Can 4N37S-TA1 replace 4N37S(TA)-V in all applications?

A: No. The 4N37S-TA1 has reduced isolation voltage (1500Vrms versus 5000Vrms) and lower maximum output voltage (30V versus 80V). Substitution is valid only when application isolation requirements do not exceed 1500Vrms and output voltage does not exceed 30V.

Q: What are the key differences between 4N37SM and 4N37S(TA)-V?

A: The 4N37SM provides 4170Vrms isolation (versus 5000Vrms), maximum output voltage of 30V (versus 80V), and faster switching times of 2µs (versus 10µs turn-on). Operating temperature range is -40°C to 100°C compared to -55°C to 110°C. Substitution is valid when isolation voltage of 4170Vrms is acceptable and output voltage does not exceed 30V.

Q: Are all three parts pin-compatible?

A: Yes. All three parts use identical 6-SMD Gull Wing surface mount packaging with matching pin configuration and footprint.

Q: Do all parts meet RoHS3 compliance?

A: Yes. The main part 4N37S(TA)-V and both substitutes 4N37S-TA1 and 4N37SM are RoHS3 compliant.

Q: What is the moisture sensitivity level for these parts?

A: All three parts have MSL 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: Which substitute has the fastest switching performance?

A: The 4N37SM has the fastest switching with 2µs turn-on and turn-off times, compared to 10µs and 9µs for the main part 4N37S(TA)-V.

Q: Can I use 4N37S-TA1 in a circuit requiring 5000Vrms isolation?

A: No. The 4N37S-TA1 provides only 1500Vrms isolation and cannot meet 5000Vrms isolation requirements.

Q: What is the operating temperature range for each part?

A: 4N37S(TA)-V: -55°C to 110°C; 4N37S-TA1: -55°C to 100°C; 4N37SM: -40°C to 100°C.