CMKZ5259B BK Equivalent & Substitute Parts

Part Overview

The CMKZ5259B BK is a Zener Diode Array manufactured by Central Semiconductor Corp, featuring three independent 39 V Zener diodes in a 6-TSSOP (SOT-363) surface mount package. This component is rated for 200 mW maximum power dissipation with ±5% voltage tolerance and is designed for applications requiring multiple independent Zener protection circuits in a compact form factor.

The CMKZ5259B BK is classified as obsolete. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for applications utilizing this component.

Substiute Parts

CMKZ5259B BK

Central Semiconductor CorpIn Stock: 909CMKZ5259B BK Datasheet

Current PartRFQ

MMBZ5259BTS-7-F

Diodes IncorporatedIn Stock: 3131MMBZ5259BTS-7-F Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CMKZ5259B BK are identified based on strict electrical and mechanical parameter matching. The following criteria determine substitution eligibility:

Critical Matching Parameters:

• Configuration: 3 Independent Zener diodes
• Voltage - Zener (Nominal): 39 V
• Tolerance: ±5%
• Power - Maximum: 200 mW
• Impedance (Maximum): 80 Ohms
• Current - Reverse Leakage @ 30 V: 100 nA
• Voltage - Forward (Maximum) @ 10 mA: 900 mV
• Operating Temperature Range: -65°C to 150°C
• Package / Case: SOT-363 (6-TSSOP)
• Mounting Type: Surface Mount
• RoHS Compliance: ROHS3 Compliant

All substitute parts must meet or exceed these specifications without deviation. Parts are grouped as direct substitutes only when all electrical parameters and package specifications are identical.

Parameter Comparison

Engineering Selection Recommendations

The MMBZ5259BTS-7-F manufactured by Diodes Incorporated is a direct electrical and mechanical equivalent to the obsolete CMKZ5259B BK. All critical electrical parameters, package specifications, and compliance certifications are identical.

Selection Basis:

1. Electrical Equivalence: All electrical parameters match exactly, including Zener voltage, power rating, impedance, leakage current, and forward voltage characteristics.

2. Package Compatibility: Both parts use the SOT-363 (6-TSSOP) surface mount package with identical pin configurations and mechanical dimensions.

3. Compliance Status: The MMBZ5259BTS-7-F maintains ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards.

4. Product Availability: The MMBZ5259BTS-7-F is classified as Active, providing assured long-term supply availability compared to the obsolete CMKZ5259B BK.

5. Regulatory Alignment: Both parts carry identical ECCN (EAR99) and HTSUS (8541.10.0050) classifications, supporting consistent regulatory documentation.

The MMBZ5259BTS-7-F is suitable for direct replacement in all applications where the CMKZ5259B BK was originally specified.

Frequently Asked Questions (FAQ)

Q: Can the MMBZ5259BTS-7-F be used as a direct replacement for the CMKZ5259B BK?

A: Yes. The MMBZ5259BTS-7-F is a direct substitute. All electrical parameters, package specifications, and compliance certifications are identical. The parts are pin-compatible and functionally equivalent.

Q: Are there any differences in the SOT-363 package between these parts?

A: No. Both parts use the 6-TSSOP (SOT-363) surface mount package with identical mechanical dimensions, pin spacing, and land pattern requirements. No PCB layout modifications are necessary.

Q: What is the difference between the CMKZ5259B BK and MMBZ5259BTS-7-F packaging options?

A: The CMKZ5259B BK is supplied in standard packaging, while the MMBZ5259BTS-7-F is supplied in Tape & Reel (TR) format. Both contain identical components; the difference is in the delivery and handling format for automated assembly processes.

Q: Do both parts meet current RoHS and environmental compliance requirements?

A: Yes. Both the CMKZ5259B BK and MMBZ5259BTS-7-F are ROHS3 compliant with MSL 1 (Unlimited) moisture sensitivity rating, meeting current environmental and manufacturing standards.

Q: What is the operating temperature range for both parts?

A: Both parts operate across the identical temperature range of -65°C to 150°C (junction temperature), ensuring thermal performance equivalence across all application environments.

Q: Are there any electrical performance differences between the two parts?

A: No. The Zener voltage (39 V), tolerance (±5%), power rating (200 mW), impedance (80 Ohms maximum), reverse leakage current (100 nA @ 30 V), and forward voltage (900 mV @ 10 mA) are identical for both parts.