GDZT2R5.6 Equivalent & Substitute Parts Reference

Part Overview

The GDZT2R5.6, manufactured by Rohm Semiconductor, is a surface mount Zener diode with a nominal Zener voltage of 5.6 V, maximum power rating of 100 mW, and 5% tolerance. It is housed in the GMD2 package (0201, 0603 Metric) and is ROHS3 compliant. As this product is marked "Obsolete," finding suitable replacement Zener diodes that match its electrical and mechanical characteristics is essential for ongoing designs, maintenance, or inventory replenishment.

Key Parameters

Parameter	GDZT2R5.6 Value	Relevance to Substitution
Voltage - Zener (Nom) (Vz)	5.6 V	Zener voltage must match for circuit functionality.
Tolerance	±5%	Determines acceptable voltage variation.
Power - Max	100 mW	Defines the maximum allowable dissipation.
Current - Reverse Leakage @ Vr	1 µA @ 2.5 V	Limits leakage current in reverse bias.
Operating Temperature	-55°C ~ 125°C	Ensures reliability across operating environments.
Mounting Type	Surface Mount	Must be compatible with PCB assembly process.
Package / Case	0201 (0603 Metric)	Ensures mechanical fit and solder layout compatibility.
RoHS Status	ROHS3 Compliant	Certification required for environmental compliance.
Moisture Sensitivity Level (MSL)	1 (Unlimited)	Determines handling and storage requirements.
REACH Status	REACH Unaffected	Chemical content compliance for EU market.

Substitute Part Grouping Explanation

Substitution is established strictly based on the following key parameters:

Nominal Zener voltage: 5.6 V
Tolerance: within the allowable range of the original device
Maximum power rating: 100 mW
Reverse leakage current: 1 µA @ 2.5 V
Package type: 0201 (0603 Metric) or equivalent surface mount variants
RoHS3 and REACH compliance
Moisture Sensitivity Level (MSL): 1 (Unlimited)
Comparable or wider operating temperature range

Only parts fully matching these explicit parameters are grouped as direct equivalents or substitutes.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power - Max	Reverse Leakage @ Vr	Operating Temp	Mounting Type	Package / Case	RoHS Status	MSL	REACH	Product Status
GDZT2R5.6	Rohm Semiconductor	5.6 V	±5%	100 mW	1 µA @ 2.5 V	-55°C ~ 125°C	Surface Mount	0201 (0603 Metric)	ROHS3	1 (Unlimited)	Unaffected	Obsolete
SDZT15R5.6	Rohm Semiconductor	5.6 V	±5%	100 mW	1 µA @ 2.5 V	150°C	Surface Mount	2-SMD, No Lead (SMD0603)	ROHS3	1 (Unlimited)	Unaffected	Active
ADZT15R5.6B	Rohm Semiconductor	5.6 V	±2.56%	100 mW	1 µA @ 2.5 V	150°C	Surface Mount	0201 (0603 Metric), SMD0603	ROHS3	1 (Unlimited)	Unaffected	Active
CZRZ5V6B-HF	Comchip Technology	5.6 V	±5.45%	100 mW	1 µA @ 2.5 V	-55°C ~ 125°C	Surface Mount	0201 (0603 Metric)	ROHS3	1 (Unlimited)	Unaffected	Obsolete

Engineering Selection Recommendations

Selection of substitute Zener diodes should be based on product status (active vs. obsolete), compliance with ROHS3, REACH status, and MSL 1 (unlimited). SDZT15R5.6 and ADZT15R5.6B are active parts that match all required environmental and handling certifications. GDZT2R5.6 and CZRZ5V6B-HF are obsolete. All parts listed are ROHS3 compliant and REACH unaffected.

Frequently Asked Questions (FAQ)

Q: What key parameters determine if a Zener diode can be substituted for GDZT2R5.6?
A: Zener voltage (5.6 V), tolerance, maximum power rating, reverse leakage current, package/case type, operating temperature, mounting type, RoHS and REACH compliance, and Moisture Sensitivity Level must be identical or compatible.

Q: Are package differences relevant for substituting the GDZT2R5.6?
A: Only equivalent or identical surface mount packages (such as 0201, 0603 Metric, or SMD0603) can be used to ensure mechanical compatibility and assembly process consistency.

Q: What compliance certifications must substitutes have?
A: ROHS3 compliance and REACH unaffected status are required for environmental and regulatory standards.

Q: Can active products be directly substituted for obsolete ones in this category?
A: Yes, as long as all listed electrical, mechanical, and compliance parameters match those described in the reference table.

Q: What considerations exist for reverse leakage current?
A: Reverse leakage current must not exceed 1 µA at 2.5 V to match the characteristics of GDZT2R5.6.

Q: Is tolerance a strict requirement?
A: Yes, the substitute must have a tolerance equal to or tighter than the original (±5% or better).

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