GDZ27B-E3-08 Equivalent & Substitute Parts

Part Overview

The GDZ27B-E3-08 is a 27 V Zener diode manufactured by Vishay General Semiconductor - Diodes Division, rated for 200 mW maximum power dissipation in a surface mount SOD-323 package. This component is classified as Active and is ROHS3 compliant. Substitute parts are identified when equivalent electrical performance and mechanical compatibility are required due to component availability, supply chain considerations, or design flexibility within specified parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	27	V
Power - Maximum	200	mW
Tolerance	±4%	—
Package / Case	SOD-323	—
Mounting Type	Surface Mount	—
Operating Temperature Range	-55°C to 150°C	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the GDZ27B-E3-08 are qualified based on the following criteria:

Electrical Compatibility:

Zener voltage (Nominal): 27 V
Package / Case: SOD-323 (SC-76)
Mounting Type: Surface Mount
RoHS Compliance: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)

Allowable Parameter Variations:

Power rating may exceed the original specification (200 mW minimum)
Tolerance may vary within industry-standard ranges (±4% to ±5%)
Operating temperature range may be extended
Impedance and leakage current specifications may differ

The substitute parts MM3Z27VT1G and SZMM3Z27VT1G maintain the critical 27 V Zener voltage and SOD-323 package format, ensuring direct mechanical and electrical compatibility in circuit applications.

Parameter Comparison

Parameter	GDZ27B-E3-08 (Vishay)	MM3Z27VT1G (onsemi)	SZMM3Z27VT1G (onsemi)
Manufacturer	Vishay General Semiconductor	onsemi	onsemi
Voltage - Zener (Nom)	27 V	27 V	27 V
Power - Max	200 mW	300 mW	300 mW
Tolerance	±4%	±5%	±5%
Impedance (Max)	150 Ohms	80 Ohms	80 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 21 V	50 nA @ 18.9 V	50 nA @ 18.9 V
Operating Temperature	-55°C to 150°C	-65°C to 150°C	-65°C to 150°C
Package / Case	SOD-323	SOD-323	SOD-323
Mounting Type	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Active	Active	Active
Automotive Grade	—	—	AEC-Q101

Engineering Selection Recommendations

GDZ27B-E3-08 (Primary Part): Use when Vishay component specifications and supply chain are preferred. This part maintains a 200 mW power rating with ±4% tolerance and is suitable for standard industrial applications.

MM3Z27VT1G (onsemi - Standard Grade): Use as a direct substitute when onsemi supply chain is available or preferred. This part provides enhanced specifications with 300 mW power rating, lower impedance (80 Ohms vs. 150 Ohms), and extended temperature range (-65°C to 150°C). The ±5% tolerance remains within acceptable design margins for 27 V Zener applications.

SZMM3Z27VT1G (onsemi - Automotive Grade): Use when AEC-Q101 automotive qualification is required. This part is electrically identical to MM3Z27VT1G and includes automotive-grade certification, making it suitable for automotive and high-reliability applications. Select this variant when design specifications mandate automotive-qualified components.

All three parts are ROHS3 compliant, maintain unlimited moisture sensitivity level (MSL 1), and are available in active production status.

Frequently Asked Questions (FAQ)

Q: Can MM3Z27VT1G replace GDZ27B-E3-08 in existing designs?

A: Yes. Both parts share the same 27 V Zener voltage, SOD-323 package, and surface mount configuration. The MM3Z27VT1G provides higher power dissipation (300 mW vs. 200 mW) and lower impedance, making it electrically compatible and functionally superior in most applications.

Q: What is the difference between MM3Z27VT1G and SZMM3Z27VT1G?

A: Both parts are electrically identical with 27 V Zener voltage, 300 mW power rating, and SOD-323 packaging. The SZMM3Z27VT1G includes AEC-Q101 automotive qualification, making it suitable for automotive applications. Select SZMM3Z27VT1G when automotive-grade certification is a design requirement.

Q: Are there tolerance differences between these parts?

A: Yes. The GDZ27B-E3-08 has ±4% tolerance, while both onsemi substitutes (MM3Z27VT1G and SZMM3Z27VT1G) have ±5% tolerance. Both tolerances are within standard industry ranges for Zener diodes and are acceptable for voltage regulation and protection circuits.

Q: Do these parts have different operating temperature ranges?

A: Yes. The GDZ27B-E3-08 operates from -55°C to 150°C, while MM3Z27VT1G and SZMM3Z27VT1G operate from -65°C to 150°C. The substitute parts provide extended low-temperature performance.

Q: Can I use these parts interchangeably on the same PCB?

A: Yes. All three parts use the SOD-323 package with identical pin configuration and footprint, allowing direct PCB substitution without layout modifications.

Q: What is the impedance difference, and does it matter?

A: The GDZ27B-E3-08 has 150 Ohms maximum impedance, while the onsemi substitutes have 80 Ohms. Lower impedance provides better voltage regulation performance and faster transient response in protection circuits. This difference is beneficial in most applications.

Q: Are all parts RoHS compliant?

A: Yes. All three parts are ROHS3 compliant and suitable for applications requiring RoHS certification.

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