DZ2S09100L Zener Diode Equivalent & Substitute Parts

Part Overview

The Panasonic DZ2S09100L is a 9.1 V, 150 mW surface mount zener diode in the SC-79/SOD-523 package. This component is discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives. The part operates as a voltage regulation and protection element in electronic circuits, with applications in power supply design, signal conditioning, and transient suppression.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	9.1	V
Tolerance	±5%	—
Power - Maximum	150	mW
Impedance (Maximum)	20	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 6 V	—
Voltage - Forward (Maximum) @ If	1 V @ 10 mA	—
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the DZ2S09100L is determined by the following critical parameters:

Primary Matching Criteria:

Zener voltage: 9.1 V nominal
Package type: SC-79 or SOD-523 surface mount
Mounting type: Surface mount
RoHS3 compliance
MSL rating: 1 (Unlimited)

Secondary Compatibility Factors:

Power dissipation rating (equal to or greater than 150 mW)
Voltage tolerance (±5% or tighter)
Impedance characteristics
Reverse leakage current specifications

Substitute parts must maintain the 9.1 V zener voltage specification and surface mount package compatibility. Parts with higher power ratings (300 mW, 500 mW) are acceptable as they provide equivalent or superior thermal performance. Tighter voltage tolerances (±2%, ±2.09%) represent improved precision. All identified substitutes comply with RoHS3 and MSL 1 requirements.

Parameter Comparison

Parameter	DZ2S09100L (Main)	BZX585-C9V1,135	EDZVFHT2R9.1B	EDZVT2R9.1B	SZMM5Z9V1ST1G	SZMM5Z9V1T1G
Manufacturer	Panasonic	Nexperia USA Inc.	Rohm Semiconductor	Rohm Semiconductor	onsemi	onsemi
Voltage - Zener (Nom)	9.1 V	9.1 V	9.1 V	9.1 V	9.1 V	9.1 V
Tolerance	±5%	±5%	±2.09%	±2%	±2%	±6%
Power - Max	150 mW	300 mW	150 mW	150 mW	500 mW	500 mW
Impedance (Max)	20 Ohms	10 Ohms	30 Ohms	30 Ohms	15 Ohms	15 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 6 V	500 nA @ 6 V	500 nA @ 6 V	500 nA @ 6 V	200 nA @ 7 V	200 nA @ 7 V
Voltage - Forward (Max) @ If	1 V @ 10 mA	1.1 V @ 100 mA	—	—	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	—	-65°C ~ 150°C	150°C (TJ)	-55°C ~ 150°C	-65°C ~ 150°C	-65°C ~ 150°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
Product Status	Discontinued	Active	Active	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Direct Equivalents (150 mW Power Rating):

EDZVT2R9.1B and EDZVFHT2R9.1B from Rohm Semiconductor provide direct power rating equivalence to the DZ2S09100L. Both parts maintain 150 mW dissipation with improved voltage tolerance (±2% and ±2.09% respectively). EDZVT2R9.1B offers the widest operating temperature range (-55°C to 150°C) and is available in higher inventory quantities (6070 pcs). EDZVFHT2R9.1B includes automotive qualification (AEC-Q101) and is suitable for automotive applications.

Higher Power Alternatives (300 mW and 500 mW):

BZX585-C9V1,135 from Nexperia provides 300 mW dissipation with automotive qualification (AEC-Q100) and superior impedance characteristics (10 Ohms). This part is suitable for applications requiring enhanced thermal margin.

SZMM5Z9V1ST1G and SZMM5Z9V1T1G from onsemi deliver 500 mW dissipation with automotive qualification (AEC-Q101) and operating temperature range of -65°C to 150°C. SZMM5Z9V1ST1G maintains ±2% tolerance matching the original specification tightly. Both onsemi parts provide the highest power dissipation capacity among available substitutes.

Compliance and Certification:

All substitute parts are ROHS3 compliant and carry MSL 1 (Unlimited) ratings, matching the original component. Automotive-grade substitutes (BZX585-C9V1,135, EDZVFHT2R9.1B, SZMM5Z9V1ST1G, SZMM5Z9V1T1G) include AEC-Q100 or AEC-Q101 qualification for automotive applications.

Selection Basis:

Choose EDZVT2R9.1B for general-purpose replacement with improved tolerance and wide temperature range. Select BZX585-C9V1,135 for applications requiring higher power dissipation and automotive qualification. Use SZMM5Z9V1ST1G or SZMM5Z9V1T1G for maximum thermal performance and automotive-grade reliability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with higher power rating (300 mW or 500 mW) in place of the 150 mW DZ2S09100L?

A: Yes. Higher power-rated zener diodes are functionally compatible substitutes. The increased power dissipation rating provides thermal margin and does not affect circuit operation. The part will regulate at the same 9.1 V zener voltage. Physical package dimensions remain identical (SC-79/SOD-523).

Q: What is the significance of voltage tolerance differences (±5% vs. ±2%)?

A: Voltage tolerance specifies the manufacturing variation range around the 9.1 V nominal value. The DZ2S09100L carries ±5% tolerance, resulting in a range of 8.645 V to 9.555 V. Substitute parts with ±2% tolerance (EDZVT2R9.1B, SZMM5Z9V1ST1G) provide tighter regulation within 8.918 V to 9.282 V. Tighter tolerance improves voltage regulation precision in sensitive applications.

Q: Are all substitute parts available in the same package?

A: Yes. All identified substitutes use the SC-79 or SOD-523 package designation, which are equivalent surface mount packages. Physical dimensions and PCB footprints are identical, enabling direct board-level replacement without layout modifications.

Q: What does RoHS3 compliance mean for component substitution?

A: RoHS3 compliance indicates the part meets Restriction of Hazardous Substances regulations, restricting lead and other hazardous materials. All substitute parts carry ROHS3 compliance matching the original DZ2S09100L, ensuring regulatory equivalence for applications subject to RoHS requirements.

Q: Which substitute part should I select for automotive applications?

A: SZMM5Z9V1ST1G, SZMM5Z9V1T1G, BZX585-C9V1,135, and EDZVFHT2R9.1B carry automotive-grade qualification (AEC-Q100 or AEC-Q101). These parts are validated for automotive temperature cycling and reliability requirements. SZMM5Z9V1ST1G combines automotive qualification with ±2% tolerance and 500 mW power rating.

Q: How does impedance affect zener diode performance?

A: Impedance (Zzt) characterizes the dynamic resistance of the zener diode during regulation. Lower impedance values indicate better voltage regulation stability under load changes. The DZ2S09100L specifies 20 Ohms maximum impedance. Substitute parts range from 10 Ohms (BZX585-C9V1,135) to 30 Ohms (EDZVT2R9.1B, EDZVFHT2R9.1B). Lower impedance substitutes provide superior regulation performance.

Q: What is the Moisture Sensitivity Level (MSL) rating?

A: MSL 1 (Unlimited) indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. All substitute parts carry MSL 1 rating, matching the original component's storage requirements.

Q: Can I substitute parts with different reverse leakage current specifications?

A: Yes. Reverse leakage current specifications indicate the small current flowing through the zener diode in reverse bias at specified voltage. The DZ2S09100L specifies 100 nA @ 6 V. Substitute parts range from 200 nA to 500 nA at their specified test voltages. Higher leakage values have minimal impact on circuit operation in most applications but may affect precision voltage reference circuits.

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