CZRA4747-G Zener Diode 20V 1W Equivalent & Substitute Parts

Part Overview

The CZRA4747-G is a surface mount Zener diode manufactured by Comchip Technology, rated for 20 V nominal Zener voltage with 1 W maximum power dissipation. This component is packaged in DO-214AC (SMA) format with tape and reel packaging for automated assembly. The part is currently in active production status with 805 units in stock.

Equivalent and substitute parts are identified when they maintain identical or functionally compatible electrical specifications and mechanical packaging. This reference enables design engineers and procurement specialists to source alternative components when the primary part is unavailable, while ensuring circuit performance and reliability remain unchanged.

Substiute Parts

CZRA4747-G

Comchip TechnologyIn Stock: 862CZRA4747-G Datasheet

Current PartRFQ

SMAJ4747A-TP

Micro Commercial CoIn Stock: 31171SMAJ4747A-TP Datasheet

UpgradeRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of Zener diodes is determined by strict equivalence of the following electrical and mechanical parameters:

Critical Substitution Parameters:

• Zener voltage rating (Vz): Must be 20 V nominal
• Voltage tolerance: Must be ±5%
• Maximum power rating: Must be 1 W
• Package type: Must be DO-214AC (SMA) surface mount
• Impedance (Zzt): Must be 22 Ohms maximum
• Reverse leakage current: Must be 5 µA @ 15.2 V
• Forward voltage: Must be 1.2 V maximum @ specified current
• RoHS compliance: Must be ROHS3 compliant

The substitute part SMAJ4747A-TP meets all critical electrical specifications and packaging requirements. Variations in operating temperature range and forward voltage test current do not affect functional substitution when the maximum ratings remain within circuit design margins.

Parameter Comparison

Engineering Selection Recommendations

SMAJ4747A-TP (Micro Commercial Co) is a direct functional equivalent to CZRA4747-G based on the following criteria:

All critical electrical parameters are identical: 20 V Zener voltage, ±5% tolerance, 1 W power rating, 22 Ohms maximum impedance, and 5 µA reverse leakage current specification.

Package and mounting specifications are identical: both use DO-214AC (SMA) surface mount format with tape and reel packaging, ensuring compatibility with existing PCB designs and automated assembly processes.

Both parts maintain ROHS3 compliance and carry identical regulatory classifications (EAR99, HTSUS 8541.10.0050), supporting equivalent supply chain and compliance documentation requirements.

The SMAJ4747A-TP offers an extended lower operating temperature limit (-65°C versus -55°C), providing additional thermal margin in applications requiring operation at lower ambient temperatures. This represents a performance enhancement rather than a limitation.

Forward voltage specifications are compatible: the SMAJ4747A-TP is specified at 1.2 V @ 100 mA, while the CZRA4747-G is specified at 1.2 V @ 200 mA. Both maintain the same maximum forward voltage rating, ensuring equivalent circuit behavior in forward-biased conditions.

Frequently Asked Questions (FAQ)

Q: Can SMAJ4747A-TP be used as a direct replacement for CZRA4747-G in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent. They share identical Zener voltage (20 V), power rating (1 W), impedance (22 Ohms), package type (DO-214AC/SMA), and RoHS compliance status. No circuit redesign or PCB modification is required.

Q: What is the difference in operating temperature range between these parts?

A: CZRA4747-G operates from -55°C to 150°C, while SMAJ4747A-TP operates from -65°C to 150°C. The SMAJ4747A-TP provides a 10°C lower minimum operating temperature. Both maintain the same 150°C maximum rating. For applications operating above -55°C, both parts are functionally equivalent.

Q: Are the forward voltage specifications compatible?

A: Yes. CZRA4747-G specifies 1.2 V maximum @ 200 mA, and SMAJ4747A-TP specifies 1.2 V maximum @ 100 mA. Both maintain the same 1.2 V maximum forward voltage rating. The different test currents do not affect circuit compatibility, as the maximum rating is the controlling specification for design purposes.

Q: Do both parts use the same package for PCB assembly?

A: Yes. Both CZRA4747-G and SMAJ4747A-TP use DO-214AC (SMA) surface mount packaging with identical lead configuration. They are footprint-compatible and require no PCB layout changes.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both parts are ROHS3 compliant, REACH unaffected, and classified as EAR99 for export control purposes. They share identical HTSUS commodity codes (8541.10.0050). Compliance documentation is equivalent.

Q: What is the reverse leakage current specification for both parts?

A: Both CZRA4747-G and SMAJ4747A-TP specify 5 µA maximum reverse leakage current @ 15.2 V. This specification is identical and ensures equivalent performance in reverse-biased circuit conditions.

Q: Can these parts be mixed in the same production batch?

A: Yes. Both parts meet identical electrical and mechanical specifications. They are suitable for use in the same circuit design and can be sourced from different manufacturers without affecting circuit performance or reliability.