NTST40H120ECTG Equivalent & Substitute Parts

Part Overview

The NTST40H120ECTG is a Schottky diode array manufactured by onsemi, configured as 1 pair common cathode with 120 V reverse voltage rating and 20 A average rectified current per diode. This component is packaged in TO-220-3 through-hole configuration and is classified as obsolete. Due to its obsolete product status, identification of equivalent substitute parts is necessary to maintain design continuity and ensure component availability for production and repair applications.

Substiute Parts

NTST40H120ECTG

onsemiIn Stock: 1205NTST40H120ECTG Datasheet

Current PartRFQ

V40120C-M3/4W

Vishay General Semiconductor - Diodes DivisionIn Stock: 4203V40120C-M3/4W Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the NTST40H120ECTG are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Diode Configuration: 1 Pair Common Cathode
• Technology: Schottky
• Voltage - DC Reverse (Vr) (Max): 120 V
• Current - Average Rectified (Io) (per Diode): 20 A
• Speed: Fast Recovery ≤ 500ns, > 200mA (Io)
• Operating Temperature - Junction: -40°C ~ 150°C
• Mounting Type: Through Hole
• Package / Case: TO-220-3

The V40120C-M3/4W from Vishay General Semiconductor - Diodes Division satisfies all critical matching parameters and qualifies as a direct equivalent substitute for the NTST40H120ECTG.

Parameter Comparison

Engineering Selection Recommendations

The V40120C-M3/4W is a qualified substitute for the obsolete NTST40H120ECTG. Both components meet identical electrical specifications for diode configuration, reverse voltage rating, average rectified current, switching speed, and operating temperature range. Both components are ROHS3 compliant and carry MSL rating of 1 (Unlimited), ensuring equivalent environmental and moisture handling requirements.

The V40120C-M3/4W carries AEC-Q101 automotive qualification and is manufactured by Vishay General Semiconductor - Diodes Division under the TMBS® series designation. The substitute part maintains active product status, ensuring long-term availability and supply chain continuity compared to the obsolete NTST40H120ECTG.

The forward voltage specification of the V40120C-M3/4W (880 mV @ 20 A) is lower than the NTST40H120ECTG (930 mV @ 20 A), representing improved efficiency characteristics. Both components are packaged identically in TO-220-3 through-hole configuration, permitting direct mechanical and electrical interchange without circuit board modification.

Frequently Asked Questions (FAQ)

Q: Can the V40120C-M3/4W directly replace the NTST40H120ECTG in existing designs?

A: Yes. Both components share identical diode configuration (1 pair common cathode), reverse voltage rating (120 V), average rectified current (20 A), switching speed (fast recovery ≤ 500ns), operating temperature range (-40°C ~ 150°C), and TO-220-3 package. Direct substitution is supported without circuit modification.

Q: What is the significance of the forward voltage difference between these parts?

A: The V40120C-M3/4W specifies 880 mV @ 20 A forward voltage compared to 930 mV @ 20 A for the NTST40H120ECTG. This 50 mV difference represents improved efficiency in the substitute part. Both values fall within acceptable operating parameters for Schottky diode arrays in this voltage and current class.

Q: Are there compliance or certification differences between these parts?

A: The V40120C-M3/4W carries AEC-Q101 automotive qualification, whereas the NTST40H120ECTG does not specify this certification. Both components are ROHS3 compliant and carry identical MSL rating of 1 (Unlimited). The automotive qualification of the substitute part indicates additional quality and reliability testing.

Q: Why is the reverse leakage current specification different?

A: The NTST40H120ECTG specifies 3 µA @ 90 V reverse leakage, while the V40120C-M3/4W specifies 500 µA @ 120 V. These measurements are taken at different voltage levels. The higher specification voltage (120 V versus 90 V) for the substitute part represents measurement at the full rated reverse voltage, providing a more conservative leakage specification.

Q: Is the TO-220-3 package identical between both parts?

A: Yes. Both the NTST40H120ECTG and V40120C-M3/4W are packaged in TO-220-3 through-hole configuration. Pin assignment and mechanical dimensions are identical, permitting direct board-level substitution without layout modification.

Q: What is the product availability status for each part?

A: The NTST40H120ECTG is classified as obsolete, indicating discontinued manufacturing and limited future availability. The V40120C-M3/4W maintains active product status, ensuring continued manufacturing and supply chain availability for current and future production requirements.