CS1D-E3/H Equivalent & Substitute Parts

Part Overview

The CS1D-E3/H is a general-purpose rectifier diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 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 active equivalent components necessary for ongoing design support and procurement continuity. The substitute part S1D-E3/61T provides functional equivalence with improved availability and active product status.

Substiute Parts

CS1D-E3/H

Vishay General Semiconductor - Diodes DivisionIn Stock: 837CS1D-E3/H Datasheet

Current PartRFQ

S1D-E3/61T

Vishay General Semiconductor - Diodes DivisionIn Stock: 126135S1D-E3/61T Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CS1D-E3/H with S1D-E3/61T is based on electrical and mechanical parameter equivalence within the following criteria:

Electrical Equivalence Parameters:

• Voltage - DC Reverse (Vr) (Max): 200 V (identical)
• Current - Average Rectified (Io): 1 A (identical)
• Package / Case: DO-214AC (SMA) (identical)
• Mounting Type: Surface Mount (identical)
• Operating Temperature - Junction: -55°C to 150°C (identical)
• RoHS Status: ROHS3 Compliant (identical)

Acceptable Parameter Variations:

• Voltage - Forward (Vf) (Max) @ If: 1.12 V (main) vs. 1.1 V (substitute) — within acceptable tolerance
• Reverse Recovery Time (trr): 1.5 µs (main) vs. 1.8 µs (substitute) — both within standard recovery classification
• Current - Reverse Leakage @ Vr: 5 µA (main) vs. 1 µA (substitute) — substitute exhibits lower leakage
• Capacitance @ Vr, F: 6 pF (main) vs. 12 pF (substitute) — both acceptable for general-purpose rectification

The S1D-E3/61T maintains functional compatibility across all critical electrical ratings and mechanical specifications while offering improved product status and availability.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: S1D-E3/61T

The S1D-E3/61T is the direct functional equivalent for the obsolete CS1D-E3/H. Selection of this substitute is based on the following engineering criteria:

• Product Status: The S1D-E3/61T holds active product status, ensuring long-term availability and supply chain continuity compared to the obsolete CS1D-E3/H.
• Electrical Equivalence: All critical electrical parameters (reverse voltage, average rectified current, forward voltage, and operating temperature range) are identical or within acceptable tolerance.
• Mechanical Compatibility: Both parts utilize the DO-214AC (SMA) surface mount package, enabling direct PCB footprint compatibility without layout modifications.
• Compliance: Both parts maintain ROHS3 compliance, satisfying regulatory requirements for new designs and legacy system updates.
• Packaging Availability: The S1D-E3/61T is available in Tape & Reel (TR) packaging with significantly higher inventory levels (126,100 pcs), supporting production volume requirements.

The S1D-E3/61T exhibits superior reverse leakage characteristics (1 µA vs. 5 µA) and slightly improved forward voltage performance (1.1 V vs. 1.12 V), providing marginal performance enhancement in thermal and efficiency considerations.

Frequently Asked Questions (FAQ)

Q: Can the S1D-E3/61T be used as a direct replacement for the CS1D-E3/H without circuit modifications?

A: Yes. The S1D-E3/61T is electrically and mechanically equivalent to the CS1D-E3/H across all critical parameters. Both parts share identical reverse voltage (200 V), average rectified current (1 A), package type (DO-214AC/SMA), and operating temperature range (-55°C to 150°C). No circuit modifications are required.

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

A: The CS1D-E3/H specifies a maximum forward voltage of 1.12 V at 1 A, while the S1D-E3/61T specifies 1.1 V at 1 A. This 0.02 V difference is within normal manufacturing tolerance and does not affect circuit functionality in general-purpose rectification applications.

Q: Are there differences in reverse recovery time between these diodes?

A: The CS1D-E3/H specifies a reverse recovery time of 1.5 µs, while the S1D-E3/61T specifies 1.8 µs. Both parts are classified as standard recovery diodes with recovery times exceeding 500 ns at currents greater than 200 mA. This variation does not affect performance in standard rectification circuits.

Q: What is the significance of the lower reverse leakage current in the S1D-E3/61T?

A: The S1D-E3/61T exhibits reverse leakage of 1 µA at 200 V compared to 5 µA for the CS1D-E3/H. Lower reverse leakage reduces standby power consumption and heat generation, providing marginal efficiency improvement in applications with sustained reverse bias conditions.

Q: Are both parts available in the same packaging formats?

A: The CS1D-E3/H is listed as obsolete with limited packaging information. The S1D-E3/61T is available in Cut Tape (CT) and Tape & Reel (TR) packaging formats, with significantly higher inventory availability (126,100 pcs). For new designs and production, the S1D-E3/61T in Tape & Reel format is the recommended procurement option.

Q: Do both parts meet the same regulatory compliance standards?

A: Yes. Both the CS1D-E3/H and S1D-E3/61T are ROHS3 compliant and carry the same ECCN (EAR99) and HTSUS (8541.10.0080) classifications. The S1D-E3/61T additionally specifies Moisture Sensitivity Level (MSL) 1 (Unlimited) and REACH Unaffected status, providing additional compliance documentation for regulated applications.

Q: Can the S1D-E3/61T be used in high-frequency switching applications?

A: Both parts are classified as standard recovery diodes suitable for general-purpose rectification. The reverse recovery time of 1.8 µs (S1D-E3/61T) and 1.5 µs (CS1D-E3/H) indicates these are not optimized for high-frequency switching applications. For switching frequencies above 100 kHz, fast recovery or Schottky diodes should be evaluated.