CDBMHT1150-HF Schottky Diode Equivalent & Substitute Parts

Part Overview

The CDBMHT1150-HF is a Schottky rectifier diode manufactured by Comchip Technology, rated for 150V DC reverse voltage with 1A average rectified current in a surface mount SOD-123HT package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The part maintains ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1), making it suitable for industrial and commercial applications requiring fast recovery characteristics.

Substiute Parts

CDBMHT1150-HF

Comchip TechnologyIn Stock: 15762CDBMHT1150-HF Datasheet

Current PartRFQ

CDBMS1200-HF

Comchip TechnologyIn Stock: 3627CDBMS1200-HF Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CDBMHT1150-HF is determined by the following electrical and mechanical parameters:

Primary Substitution Criteria:

• Technology type: Schottky rectifier diode
• Current rating: 1A average rectified current (Io)
• Mounting configuration: Surface mount
• Recovery speed: Fast recovery ≤ 500ns at > 200mA

Allowable Parameter Variations:

• Voltage - DC Reverse (Vr): Substitute parts must equal or exceed 150V rating
• Voltage - Forward (Vf): Substitute parts must not exceed the original specification by more than the tolerance inherent to Schottky technology
• Reverse leakage current: Lower values are acceptable
• Capacitance: Lower values are acceptable
• Operating temperature range: Must accommodate the original -55°C to 150°C junction temperature requirement
• Package compatibility: SOD-123 family packages (SOD-123F, SOD-123HT) are mechanically compatible

The CDBMS1200-HF meets all substitution criteria with a higher voltage rating (200V), lower forward voltage drop (900mV vs 920mV), reduced reverse leakage (200µA vs 500µA), and active product status.

Parameter Comparison

Engineering Selection Recommendations

Primary Recommendation: CDBMS1200-HF

The CDBMS1200-HF is the direct substitute for CDBMHT1150-HF based on the following engineering factors:

1. Product Status: CDBMS1200-HF is actively manufactured by Comchip Technology, whereas CDBMHT1150-HF is obsolete. Active production status ensures long-term availability and supply chain continuity.

2. Electrical Compatibility: The substitute part exceeds the voltage specification (200V vs 150V), providing design margin for transient overvoltage conditions. The 1A current rating is identical. Forward voltage drop is improved (900mV vs 920mV), reducing power dissipation.

3. Compliance Certifications: Both parts maintain ROHS3 compliance and EAR99 export classification. MSL 1 rating is identical, indicating no moisture sensitivity constraints during storage and handling.

4. Thermal Performance: Operating temperature range of -50 to 150°C accommodates the original specification requirement of -55 to 150°C. The 5°C difference at the lower bound is within acceptable engineering tolerance for most industrial applications.

5. Package Compatibility: SOD-123F package is mechanically compatible with SOD-123T footprints on PCB layouts. Both are surface mount packages with identical lead spacing and mounting area requirements.

6. Performance Improvements: Reverse leakage current is reduced by 60% (200µA vs 500µA), and junction capacitance is reduced by 79% (25pF vs 120pF), resulting in improved circuit performance and reduced switching losses.

Frequently Asked Questions (FAQ)

Q: Can CDBMS1200-HF be used as a direct replacement for CDBMHT1150-HF in existing designs?

A: Yes. The CDBMS1200-HF is electrically and mechanically compatible. The higher voltage rating (200V vs 150V) provides additional design margin. The identical 1A current rating and fast recovery characteristics ensure functional equivalence. PCB footprints for SOD-123 family packages are compatible.

Q: What is the significance of the voltage rating difference (150V vs 200V)?

A: The substitute part is rated for 200V DC reverse voltage, exceeding the original 150V specification. This provides additional safety margin against transient overvoltage events and allows use in higher voltage applications. The part will function correctly in circuits designed for 150V operation.

Q: Are there any thermal considerations when substituting CDBMS1200-HF for CDBMHT1150-HF?

A: The operating temperature range differs by 5°C at the lower bound (-50°C vs -55°C for CDBMS1200-HF). For applications requiring operation below -50°C, the original part specification must be maintained. For standard industrial temperature ranges (-40°C to 85°C), both parts are equivalent.

Q: How do the forward voltage characteristics compare?

A: CDBMS1200-HF exhibits lower forward voltage (900mV vs 920mV at 1A), resulting in reduced power dissipation and improved efficiency. This is a performance improvement over the original part.

Q: What is the impact of reduced reverse leakage current in CDBMS1200-HF?

A: The 60% reduction in reverse leakage current (200µA vs 500µA) improves circuit performance by reducing standby power consumption and leakage paths. This is beneficial for low-power and precision applications.

Q: Are both parts RoHS compliant?

A: Yes. Both CDBMHT1150-HF and CDBMS1200-HF are ROHS3 compliant, meeting environmental and regulatory requirements for commercial and industrial applications.

Q: What is the difference between SOD-123T and SOD-123F packages?

A: Both are surface mount Schottky diode packages within the SOD-123 family. SOD-123T and SOD-123F are mechanically compatible with identical PCB footprints and lead spacing. The designations reflect minor manufacturing variations by Comchip Technology.

Q: Is CDBMS1200-HF available in the same packaging format (Tape & Reel)?

A: CDBMS1200-HF is supplied in Tape & Reel (TR) packaging, suitable for automated assembly processes. Inventory availability is 3613 pieces in new original condition.