GDZ33B-E3-08 Equivalent & Substitute Parts

Part Overview

The GDZ33B-E3-08 is a Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated at 33 V nominal with 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as an active product with full RoHS3 compliance and unlimited moisture sensitivity rating (MSL 1). Substitute parts are identified when the main part becomes unavailable, when inventory constraints require alternative sourcing, or when application requirements permit operation within the specified parameter tolerances of equivalent devices.

Substiute Parts

GDZ33B-E3-08

Vishay General Semiconductor - Diodes DivisionIn Stock: 802GDZ33B-E3-08 Datasheet

Current PartRFQ

CMDZ5257B TR PBFREE

Central Semiconductor CorpIn Stock: 12548CMDZ5257B TR PBFREE Datasheet

MFR RecommendedRFQ

MM3Z33VT1G

onsemiIn Stock: 35354MM3Z33VT1G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the GDZ33B-E3-08 are qualified based on the following criteria:

Primary Matching Parameters:

• Zener voltage (Nominal): 33 V
• Package type: SOD-323 surface mount
• Mounting configuration: Surface mount
• Regulatory compliance: RoHS3 compliant

Allowable Variation Parameters:

• Power rating: Equal to or greater than 200 mW
• Tolerance: Within ±6% (broader than the main part's ±4%)
• Impedance: Variation permitted based on manufacturer design
• Reverse leakage current: Variation permitted within manufacturer specifications
• Operating temperature range: Equal to or broader than -55°C to 150°C

Both identified substitute parts (CMDZ5257B TR PBFREE and MM3Z33VT1G) maintain the 33 V zener voltage specification and SOD-323 package format while offering equal or superior power handling capabilities and extended or equivalent temperature operating ranges.

Parameter Comparison

Engineering Selection Recommendations

GDZ33B-E3-08 (Primary Part) Select this part when the original specification is required and inventory is available. This part offers the tightest tolerance (±4%) and is the baseline reference for this application.

CMDZ5257B TR PBFREE (Substitute - Central Semiconductor) This substitute provides 250 mW power rating (25% higher than the main part) with ±5% tolerance. The extended operating temperature range (-65°C to 150°C) accommodates broader environmental conditions. Lower impedance (58 Ohms versus 250 Ohms) results in improved transient response characteristics. RoHS3 compliance and unlimited MSL rating maintain regulatory equivalence.

MM3Z33VT1G (Substitute - onsemi) This substitute provides 300 mW power rating (50% higher than the main part) with ±6% tolerance. The extended operating temperature range (-65°C to 150°C) and lower reverse leakage current (50 nA) offer enhanced performance margins. Lower impedance (80 Ohms) improves dynamic response. RoHS3 compliance and unlimited MSL rating maintain regulatory equivalence.

All three parts are active products with confirmed inventory availability and full regulatory compliance documentation.

Frequently Asked Questions (FAQ)

Q: Can CMDZ5257B TR PBFREE or MM3Z33VT1G be used as direct replacements for GDZ33B-E3-08?

A: Both parts are direct substitutes for the GDZ33B-E3-08 in SOD-323 surface mount applications requiring 33 V zener regulation. All three parts share identical zener voltage (33 V), package format (SOD-323), mounting type (surface mount), and regulatory compliance (RoHS3, REACH Unaffected). The substitute parts offer equal or superior power handling and extended temperature ranges.

Q: What are the tolerance differences between these parts?

A: The GDZ33B-E3-08 specifies ±4% tolerance, CMDZ5257B TR PBFREE specifies ±5%, and MM3Z33VT1G specifies ±6%. Applications requiring the tightest tolerance specification should use the GDZ33B-E3-08. Applications with tolerance margins of ±5% or ±6% can use the respective substitute parts.

Q: How do the power ratings differ?

A: The GDZ33B-E3-08 is rated at 200 mW maximum power dissipation. CMDZ5257B TR PBFREE is rated at 250 mW (25% higher), and MM3Z33VT1G is rated at 300 mW (50% higher). Applications operating at or near the 200 mW limit benefit from the higher power ratings of the substitute parts, providing additional thermal margin.

Q: Are there impedance differences that affect circuit performance?

A: The GDZ33B-E3-08 specifies 250 Ohms maximum impedance, while CMDZ5257B TR PBFREE specifies 58 Ohms and MM3Z33VT1G specifies 80 Ohms. Lower impedance values in the substitute parts result in improved transient response and faster voltage regulation during load transients. Applications sensitive to impedance characteristics should evaluate this parameter against circuit requirements.

Q: Do the operating temperature ranges differ?

A: The GDZ33B-E3-08 operates from -55°C to 150°C. Both substitute parts extend the lower temperature limit to -65°C, providing 10°C additional margin at low temperatures. The upper temperature limit remains 150°C for all three parts. Applications requiring operation below -55°C benefit from the extended range of the substitute parts.

Q: Are all parts RoHS3 compliant?

A: Yes. The GDZ33B-E3-08, CMDZ5257B TR PBFREE, and MM3Z33VT1G are all RoHS3 compliant with REACH Unaffected status. All parts carry unlimited moisture sensitivity rating (MSL 1), eliminating moisture-related handling constraints.

Q: What is the reverse leakage current specification?

A: The GDZ33B-E3-08 and CMDZ5257B TR PBFREE both specify 100 nA reverse leakage current at their respective reference voltages. The MM3Z33VT1G specifies 50 nA at 23.2 V, representing lower leakage. Applications with stringent leakage requirements benefit from the MM3Z33VT1G specification.