CS1G-E3/H Equivalent & Substitute Parts

Part Overview

The CS1G-E3/H is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This part is classified as obsolete, making identification of equivalent and substitute components necessary for ongoing design support, maintenance, and production continuity. Substitute parts listed herein maintain electrical and mechanical compatibility within the specified parameter ranges.

Substiute Parts

CS1G-E3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 989CS1G-E3/H Datasheet

Current PartRFQ

S1G-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 137148S1G-E3/61T Datasheet

DirectRFQ

1SR156-400TE25

Rohm SemiconductorIn Stock: 754961SR156-400TE25 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CS1G-E3/H are qualified based on the following electrical and mechanical parameters:

Electrical Compatibility Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Package / Case: DO-214AC, SMA (identical physical form factor)
• Mounting Type: Surface Mount (identical assembly method)
• Operating Temperature - Junction: -55°C to 150°C range (minimum overlap required)

Substitution Logic: Parts meeting or exceeding the above parameters are electrically and mechanically compatible. Forward voltage, reverse recovery time, and reverse leakage current may vary within acceptable ranges for general-purpose rectification applications. Packaging format (Cut Tape, Digi-Reel, or bulk) does not affect electrical substitution but affects procurement and handling.

Parameter Comparison

Engineering Selection Recommendations

S1G-E3/61T (Vishay General Semiconductor): This substitute is the primary equivalent for the CS1G-E3/H. It maintains identical voltage and current ratings, package form factor, and operating temperature range. The S1G-E3/61T is classified as Active product status, ensuring long-term availability and supply chain continuity. It is ROHS3 Compliant with Moisture Sensitivity Level 1 (Unlimited), indicating robust handling characteristics. Forward voltage is marginally lower (1.1 V vs. 1.12 V), and reverse leakage is superior (1 µA vs. 5 µA), making this the preferred direct replacement.

1SR156-400TE25 (Rohm Semiconductor): This substitute meets the core voltage and current requirements and shares the DO-214AC package. However, it is classified as Not For New Designs, indicating limited future availability and potential discontinuation. The forward voltage specification is measured at 800 mA rather than 1 A, and reverse recovery time is significantly faster (400 ns vs. 1.5 µs), which may alter circuit behavior in applications sensitive to switching characteristics. This part is suitable for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can the S1G-E3/61T directly replace the CS1G-E3/H without circuit modification?

A: Yes. The S1G-E3/61T maintains identical voltage rating (400 V), current rating (1 A), package (DO-214AC, SMA), and operating temperature range (-55 to 150 °C). Electrical parameters fall within acceptable variation for general-purpose rectification. No circuit modification is required.

Q: What is the significance of the different forward voltage specifications for the 1SR156-400TE25?

A: The 1SR156-400TE25 specifies forward voltage at 800 mA (1.3 V) rather than 1 A. This indicates different measurement conditions and does not directly compare to the CS1G-E3/H specification at 1 A (1.12 V). The actual forward voltage at 1 A operation may differ from the stated value. Verify circuit performance if this part is selected.

Q: Why is the 1SR156-400TE25 marked "Not For New Designs"?

A: This designation indicates the manufacturer does not recommend this part for new product development due to planned discontinuation or limited production commitment. It remains available for existing system support and maintenance but should not be selected for new designs where long-term supply is required.

Q: Are all three parts physically interchangeable in the same PCB footprint?

A: Yes. All three parts use the DO-214AC (SMA) package and surface mount mounting type. PCB footprints and assembly processes are identical. Packaging format (Cut Tape, Digi-Reel, or bulk) affects procurement and handling only, not physical compatibility.

Q: What does ROHS3 Compliant status mean for substitution?

A: ROHS3 Compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead, cadmium, mercury, and other hazardous materials. Both active substitutes (S1G-E3/61T and 1SR156-400TE25) are ROHS3 Compliant, ensuring regulatory alignment with modern manufacturing and environmental standards.

Q: How does reverse recovery time affect circuit performance?

A: Reverse recovery time (trr) determines how quickly the diode transitions from conducting to blocking state. The CS1G-E3/H specifies 1.5 µs, while the 1SR156-400TE25 specifies 400 ns (faster). Faster recovery reduces switching losses but may increase electromagnetic interference in sensitive circuits. The S1G-E3/61T (1.8 µs) is closest to the original specification.

Q: Is the S1G-E3/61T available in the same packaging format as the CS1G-E3/H?

A: The S1G-E3/61T is supplied in Cut Tape (CT) format, while the CS1G-E3/H packaging format is not specified in the provided data. Both are surface mount DO-214AC packages suitable for automated assembly. Confirm packaging requirements with your procurement process.