CD4625A Equivalent & Substitute Parts

Part Overview

The CD4625A is an active Zener diode voltage regulator manufactured by Microchip Technology, classified as a surface mount die component. This 5.1 V, 500 mW Zener diode is designed for voltage regulation and protection applications requiring precise reference voltage generation. The part maintains active product status with 977 units currently in stock. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity for applications where the primary part number becomes unavailable or where alternative sourcing is required.

Substiute Parts

CD4625A

Microchip TechnologyIn Stock: 1020CD4625A Datasheet

Current PartRFQ

CD4625

Microchip TechnologyIn Stock: 1228CD4625 Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the CD4625A is determined by strict equivalence across all critical electrical and mechanical parameters. The substitute part CD4625 qualifies as a parametric equivalent based on the following criteria:

Electrical Parameter Equivalence:

• Zener voltage (Nominal): 5.1 V
• Tolerance specification: ±5%
• Maximum power dissipation: 500 mW
• Maximum impedance: 1500 Ohms
• Reverse leakage current: 10 µA @ 3 V
• Forward voltage: 1.5 V @ 200 mA
• Operating temperature range: -65°C to 175°C

Mechanical Parameter Equivalence:

• Mounting type: Surface Mount
• Package configuration: Die
• Supplier device package: Die

Both parts are manufactured by Microchip Technology and classified as Zener diodes in the voltage regulator category. The CD4625 maintains active product status and demonstrates full electrical and mechanical compatibility with the CD4625A, enabling direct substitution in circuit applications.

Parameter Comparison

Engineering Selection Recommendations

The CD4625 qualifies as a direct parametric equivalent to the CD4625A for all circuit applications. Selection between these parts is based on the following engineering considerations:

Product Status and Availability: Both parts maintain active product status with Microchip Technology. The CD4625 currently has higher inventory availability (1188 units) compared to the CD4625A (977 units), making it suitable for high-volume procurement or extended supply chain requirements.

Compliance and Regulatory Status: Both parts are REACH Unaffected and classified under ECCN EAR99, indicating identical regulatory compliance profiles. The CD4625 carries RoHS3 Compliant certification and Moisture Sensitivity Level (MSL) 1 (Unlimited) designation, providing additional environmental and handling documentation for applications requiring enhanced compliance verification.

Electrical and Mechanical Compatibility: Complete parameter equivalence across voltage regulation characteristics, thermal operating range, and surface mount die packaging ensures functional interchangeability without circuit redesign or performance degradation.

Frequently Asked Questions (FAQ)

Q: Can the CD4625 be used as a direct replacement for the CD4625A in existing circuit designs?

A: Yes. The CD4625 is a parametric equivalent with identical electrical specifications across all critical parameters including Zener voltage (5.1 V), power rating (500 mW), impedance (1500 Ohms), and operating temperature range (-65°C to 175°C). No circuit modifications are required.

Q: Are there any differences in packaging or mounting between the CD4625A and CD4625?

A: No. Both parts use identical surface mount die packaging and supplier device package configurations. Physical and electrical interface characteristics are equivalent.

Q: What compliance certifications apply to the CD4625 substitute part?

A: The CD4625 is REACH Unaffected, RoHS3 Compliant, and classified under ECCN EAR99. It carries Moisture Sensitivity Level (MSL) 1 (Unlimited), indicating no moisture sensitivity restrictions during storage or handling.

Q: How do the reverse leakage current specifications compare between these parts?

A: Both the CD4625A and CD4625 specify identical reverse leakage current of 10 µA measured at 3 V reverse bias. This parameter is critical for voltage regulation accuracy and is fully equivalent across both part numbers.

Q: Is the CD4625 suitable for applications requiring extended temperature operation?

A: Yes. The CD4625 operates across the full temperature range of -65°C to 175°C, matching the CD4625A specification. This range supports both industrial and high-temperature application requirements.

Q: What is the forward voltage characteristic of the CD4625 substitute?

A: The CD4625 specifies a maximum forward voltage of 1.5 V at 200 mA forward current, identical to the CD4625A. This parameter determines forward biased diode behavior in circuit applications.