ES1H Equivalent & Substitute Parts Reference

Part Overview

The ES1H is a general-purpose rectifier diode manufactured by onsemi, rated for 500 V DC reverse voltage and 1 A average rectified current in a surface mount DO-214AC (SMA) package. This component is classified as "Not For New Designs," indicating it has been superseded in onsemi's product portfolio. Organizations using ES1H in existing designs or legacy systems require equivalent substitute components that maintain functional compatibility while meeting current manufacturing and compliance standards.

Substiute Parts

ES1H

onsemiIn Stock: 192813ES1H Datasheet

Current PartRFQ

CMR1-04M BK PBFREE

Central Semiconductor CorpIn Stock: 1134CMR1-04M BK PBFREE Datasheet

SimilarRFQ

CMR1-04M TR13 PBFREE

Central Semiconductor CorpIn Stock: 59086CMR1-04M TR13 PBFREE Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute components for the ES1H must satisfy the following criteria based on allowed electrical and mechanical parameters:

Mandatory Compatibility Requirements:

• Package / Case: DO-214AC, SMA (surface mount)
• Mounting Type: Surface Mount
• Current - Average Rectified (Io): 1 A minimum
• Voltage - DC Reverse (Vr) (Max): 500 V minimum
• RoHS3 Compliance
• Moisture Sensitivity Level (MSL): 1 (Unlimited)

Identified Substitute Parts:

The following components from Central Semiconductor Corp meet the mandatory package and mounting requirements but operate at reduced voltage ratings:

1. CMR1-04M TR13 PBFREE (Tape & Reel packaging)
2. CMR1-04M BK PBFREE (Bulk packaging)

Both substitute parts are rated for 400 V DC reverse voltage, which is lower than the ES1H specification of 500 V. These substitutes are suitable only for applications where the actual operating voltage does not exceed 400 V, regardless of the original design specification of 500 V.

Parameter Comparison

Engineering Selection Recommendations

CMR1-04M TR13 PBFREE is the preferred substitute when tape and reel packaging is required for automated assembly processes. This part maintains active product status with Central Semiconductor Corp and carries ROHS3 compliance certification. The tape and reel format aligns with high-volume manufacturing workflows.

CMR1-04M BK PBFREE is the appropriate selection when bulk packaging is acceptable for manual assembly or lower-volume applications. This variant also maintains active product status and full compliance certifications.

Critical Voltage Derating Consideration: Both substitute parts operate at 400 V maximum reverse voltage, representing an 80 V reduction from the ES1H specification. Circuit designs must be evaluated to confirm that actual operating voltages remain within the 400 V limit. Applications requiring the full 500 V rating cannot use these substitutes.

Recovery Speed Difference: The ES1H features fast recovery characteristics (≤ 500 ns), while substitute parts employ standard recovery (> 500 ns). Applications sensitive to switching speed or reverse recovery time must account for this performance difference.

Forward Voltage Advantage: Substitute parts exhibit lower forward voltage drop (1.1 V versus 1.7 V at 1 A), resulting in reduced power dissipation and improved thermal performance in the application circuit.

Frequently Asked Questions (FAQ)

Q: Can CMR1-04M parts directly replace ES1H in all applications?

A: Direct replacement is limited by voltage rating. The CMR1-04M series is rated for 400 V maximum reverse voltage, while ES1H is rated for 500 V. Substitution is valid only when the actual circuit operating voltage does not exceed 400 V. Applications requiring the full 500 V rating cannot use these substitutes.

Q: What is the difference between CMR1-04M TR13 PBFREE and CMR1-04M BK PBFREE?

A: Both parts are electrically identical with the same 400 V rating, 1 A current, and forward voltage characteristics. The primary difference is packaging: TR13 PBFREE is supplied in tape and reel format for automated assembly, while BK PBFREE is supplied in bulk format. Selection depends on manufacturing process requirements.

Q: Why does the ES1H show "Not For New Designs" status?

A: This designation indicates that onsemi has discontinued active development and promotion of the ES1H. The part remains available in inventory but is not recommended for new circuit designs. Existing designs using ES1H should evaluate the CMR1-04M series as a forward-compatible alternative.

Q: Are there electrical performance differences between ES1H and CMR1-04M parts?

A: Yes. The ES1H features fast recovery time (35 ns) and higher forward voltage (1.7 V @ 1 A), while CMR1-04M parts have standard recovery characteristics and lower forward voltage (1.1 V @ 1 A). The lower forward voltage in CMR1-04M parts reduces power dissipation. Applications sensitive to switching speed must account for the recovery time difference.

Q: Do both substitute parts meet the same compliance standards as ES1H?

A: Yes. Both CMR1-04M TR13 PBFREE and CMR1-04M BK PBFREE are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating, matching the ES1H compliance profile.

Q: What is the reverse leakage current difference between ES1H and substitutes?

A: ES1H exhibits 5 µA reverse leakage at 500 V. CMR1-04M TR13 PBFREE shows 5 µA at 400 V, while CMR1-04M BK PBFREE shows 10 µA at 400 V. The leakage specifications are measured at their respective voltage ratings and are not directly comparable due to the voltage difference.

Q: Can I use CMR1-04M parts in a 500 V application if I derate the circuit?

A: No. The maximum reverse voltage rating of CMR1-04M parts is 400 V. This is an absolute maximum rating, not a derating guideline. Using these parts in circuits designed for 500 V operation violates the component specification and creates reliability risk.

Q: Is the DO-214AC package identical between ES1H and CMR1-04M parts?

A: Yes. Both the ES1H and CMR1-04M series use the DO-214AC (SMA) surface mount package. Physical dimensions and PCB footprints are identical, allowing direct mechanical substitution without layout changes.