CLLR1-04 TR Equivalent & Substitute Parts

Part Overview

The CLLR1-04 TR is a general-purpose rectifier diode manufactured by Central Semiconductor Corp, rated for 400 V DC reverse voltage and 1 A average rectified current in a surface mount MELF package. This component is classified as obsolete, necessitating identification of active equivalent alternatives for new designs and production continuity. Substitute parts must maintain electrical performance specifications while accommodating package and thermal operating range variations.

Substiute Parts

CLLR1-04 TR

Central Semiconductor CorpIn Stock: 914CLLR1-04 TR Datasheet

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CMR1-04M TR13

Central Semiconductor CorpIn Stock: 4774CMR1-04M TR13 Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the CLLR1-04 TR is determined by the following critical electrical and mechanical parameters:

Electrical Equivalence Criteria:

• Voltage - DC Reverse (Vr) (Max): 400 V minimum
• Current - Average Rectified (Io): 1 A minimum
• Voltage - Forward (Vf) (Max) @ If: 1.1 V or lower @ 1 A
• Speed: Standard Recovery >500ns, > 200mA (Io)
• Current - Reverse Leakage @ Vr: 10 µA or lower @ 400 V

Mechanical Compatibility Criteria:

• Mounting Type: Surface Mount
• Package / Case: DO-213AB (MELF) or equivalent surface mount packages
• Operating Temperature - Junction: -65°C minimum to 150°C minimum

The CMR1-04M TR13 meets all electrical specifications and operates within the required temperature range. The primary difference is the package format change from MELF (DO-213AB) to SMA (DO-214AC), which requires PCB layout modification but maintains electrical performance and surface mount compatibility.

Parameter Comparison

Engineering Selection Recommendations

The CMR1-04M TR13 is the primary substitute for the obsolete CLLR1-04 TR. Both components are manufactured by Central Semiconductor Corp and share identical electrical specifications for voltage, current, and forward voltage characteristics. The CMR1-04M TR13 maintains active product status, ensuring long-term availability and supply chain continuity.

Key Considerations:

The CMR1-04M TR13 features improved reverse leakage current (5 µA versus 10 µA), providing enhanced performance in low-leakage applications. The operating temperature range of the substitute extends to 150°C maximum, compared to 175°C for the original part; this difference is acceptable for applications operating within standard industrial temperature limits.

The package transition from MELF (DO-213AB) to SMA (DO-214AC) requires PCB footprint modification. Both packages are standard surface mount formats with established design guidelines. The SMA package is widely supported across manufacturing and assembly processes.

Both components carry identical export control classification (EAR99) and tariff codes (HTSUS 8541.10.0080), ensuring regulatory compliance equivalence.

Frequently Asked Questions (FAQ)

Q: Can the CMR1-04M TR13 directly replace the CLLR1-04 TR without circuit modification?

A: Electrical substitution is direct; no circuit modifications are required. However, PCB layout changes are necessary due to the package format difference (MELF to SMA). The footprint dimensions and pad spacing differ between DO-213AB and DO-214AC packages.

Q: What is the difference between MELF and SMA packages?

A: MELF (DO-213AB) and SMA (DO-214AC) are both surface mount diode packages with different physical dimensions and footprints. MELF packages are cylindrical with axial leads, while SMA packages are rectangular with end caps. Both are standard surface mount formats; the selection depends on PCB design and assembly equipment compatibility.

Q: Are there any performance differences between the CLLR1-04 TR and CMR1-04M TR13?

A: Electrical performance is equivalent across all critical parameters: 400 V reverse voltage, 1 A average rectified current, and 1.1 V forward voltage. The CMR1-04M TR13 exhibits lower reverse leakage current (5 µA versus 10 µA), which is a performance improvement. The maximum operating temperature is 150°C for the substitute versus 175°C for the original.

Q: Is the CMR1-04M TR13 available in lead-free versions?

A: Yes, the CMR1-04M TR13 PBFREE variant is available, meeting RoHS and lead-free manufacturing requirements.

Q: What is the inventory status of the substitute part?

A: The CMR1-04M TR13 has 4,719 pieces in stock as new original inventory, compared to 818 pieces for the obsolete CLLR1-04 TR. The substitute provides superior supply availability.

Q: Are there additional cross-reference alternatives listed?

A: The CMR1-04M TR13 cross-references include S1G-13-F as an additional equivalent designation from alternative suppliers or product lines.