DDZX36-13 Equivalent & Substitute Parts

Part Overview

The DDZX36-13 is a Zener diode manufactured by Diodes Incorporated, rated at 36.9 V nominal with 300 mW power dissipation in a surface mount SOT-23-3 package. This component is classified as an active product and is RoHS3 compliant. Substitute parts are identified when equivalent electrical specifications and mechanical compatibility are maintained across the same product family, enabling design flexibility and supply chain optimization.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	36.9	V
Tolerance	±3	%
Power - Max	300	mW
Impedance (Max)	85	Ohms
Current - Reverse Leakage @ Vr	50 nA @ 30 V	nA
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	mV
Operating Temperature Range	-65 to 150	°C
Package / Case	SOT-23-3	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DDZX36-13 with the DDZX36-7 is based on identical electrical and mechanical specifications. Both parts share the same base product number (DDZX36) and maintain equivalent performance across all critical parameters: nominal Zener voltage of 36.9 V, tolerance of ±3%, maximum power rating of 300 mW, impedance of 85 Ohms maximum, reverse leakage current of 50 nA at 30 V, forward voltage of 900 mV at 10 mA, and operating temperature range of -65°C to 150°C. Both components are packaged in SOT-23-3 surface mount configuration and comply with RoHS3 and REACH requirements. The substitution is valid where these electrical and mechanical parameters satisfy circuit design requirements.

Parameter Comparison

Parameter	DDZX36-13	DDZX36-7	Match
Voltage - Zener (Nom)	36.9 V	36.9 V	Yes
Tolerance	±3%	±3%	Yes
Power - Max	300 mW	300 mW	Yes
Impedance (Max)	85 Ohms	85 Ohms	Yes
Current - Reverse Leakage @ Vr	50 nA @ 30 V	50 nA @ 30 V	Yes
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	Yes
Operating Temperature Range	-65°C to 150°C	-65°C to 150°C	Yes
Package / Case	SOT-23-3	SOT-23-3	Yes
Mounting Type	Surface Mount	Surface Mount	Yes
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Yes
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	Yes

Engineering Selection Recommendations

Both DDZX36-13 and DDZX36-7 are active products from Diodes Incorporated with identical electrical and mechanical specifications. Selection between these parts is based on availability and supply chain considerations rather than technical performance differences. Both components satisfy RoHS3 compliance and REACH requirements. The DDZX36-7 currently maintains higher inventory levels (3200 Pcs) compared to DDZX36-13 (812 Pcs), which may influence procurement decisions for high-volume applications. Either part is suitable for direct substitution in circuit designs where the specified electrical parameters are required.

Frequently Asked Questions (FAQ)

Question	Answer
Can DDZX36-7 replace DDZX36-13 in existing designs?	Yes. Both parts are electrically and mechanically identical across all specified parameters, including Zener voltage, power rating, impedance, leakage current, forward voltage, operating temperature range, and SOT-23-3 package configuration.
Are there any compliance differences between DDZX36-13 and DDZX36-7?	No. Both parts are RoHS3 compliant, REACH unaffected, and carry identical moisture sensitivity level (MSL 1 - Unlimited).
What is the primary difference between these two part numbers?	The parts are functionally equivalent. Differences exist only in manufacturing lot tracking and inventory management, not in electrical or mechanical performance.
Is PCB layout modification required when substituting DDZX36-13 with DDZX36-7?	No. Both components use the identical SOT-23-3 surface mount package with the same pin configuration and footprint requirements.
What parameters define substitution eligibility for this Zener diode?	Substitution is valid when the following parameters match: nominal Zener voltage (36.9 V), voltage tolerance (±3%), maximum power dissipation (300 mW), impedance (85 Ohms max), reverse leakage current (50 nA @ 30 V), forward voltage (900 mV @ 10 mA), operating temperature range (-65°C to 150°C), and package type (SOT-23-3).
Can these parts be used in high-temperature applications?	Yes. Both DDZX36-13 and DDZX36-7 are rated for operating temperatures up to 150°C, supporting high-temperature circuit requirements within the specified range.