DZ2S270M0L Equivalent & Substitute Parts

Part Overview

The DZ2S270M0L is a surface mount Zener diode manufactured by Panasonic Electronic Components, rated at 27.01 V nominal with 150 mW power dissipation capability. This component is designed for voltage regulation and protection applications in electronic circuits. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. Substitute parts must maintain compatibility with the SSMini2-F5-B package footprint and deliver equivalent electrical performance within specified tolerance ranges.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	27.01	V
Tolerance	±2.5%	%
Power - Max	150	mW
Impedance (Max)	120	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 21 V
Voltage - Forward (Max) @ If	1	V @ 10 mA
Operating Temperature Range	-40 to 85	°C
Mounting Type	Surface Mount	—
Package / Case	SC-79, SOD-523	—
RoHS Status	RoHS Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution eligibility for the DZ2S270M0L is determined by the following critical parameters:

Zener Voltage Compatibility: Substitute parts must operate at a nominal Zener voltage within the tolerance band of the original specification. The DZ2S270M0L operates at 27.01 V ±2.5%, establishing a functional range of 26.33 V to 27.69 V. Substitute parts rated at 27 V with ±2% or ±2.48% tolerance fall within acceptable operating parameters for voltage regulation applications.

Power Dissipation: The original part is rated at 150 mW maximum. Substitute parts with equal or greater power ratings (150 mW or higher) maintain thermal compatibility and do not introduce derating requirements.

Package Footprint: All substitute parts must use SC-79 or SOD-523 package designations to ensure mechanical compatibility with existing PCB layouts.

Surface Mount Configuration: All candidates are surface mount devices, maintaining assembly process compatibility.

Environmental and Compliance Requirements: RoHS compliance and MSL rating of 1 (Unlimited) are maintained across all substitute options, ensuring regulatory and manufacturing process alignment.

The three identified substitute parts meet these criteria while offering additional benefits such as active product status, automotive-grade qualification, or enhanced temperature operating ranges.

Parameter Comparison

Parameter	DZ2S270M0L (Panasonic)	BZX585-B27,115 (Nexperia)	EDZVFHT2R27B (Rohm)	EDZVT2R27B (Rohm)
Voltage - Zener (Nom)	27.01 V	27 V	27 V	27 V
Tolerance	±2.5%	±2%	±2.48%	±2%
Power - Max	150 mW	300 mW	150 mW	150 mW
Impedance (Max)	120 Ohms	80 Ohms	150 Ohms	150 Ohms
Current - Reverse Leakage @ Vr	50 nA @ 21 V	50 nA @ 18.9 V	100 nA @ 21 V	100 nA @ 21 V
Operating Temperature Range	-40 to 85°C	-65 to 150°C	Up to 150°C (TJ)	-55 to 150°C
Package / Case	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523	SC-79, SOD-523
RoHS Status	RoHS Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active

Engineering Selection Recommendations

BZX585-B27,115 (Nexperia USA Inc.): This substitute offers the highest power rating at 300 mW, providing thermal margin above the original 150 mW specification. The part carries automotive-grade qualification (AEC-Q100) and operates across an extended temperature range of -65°C to 150°C. The lower impedance of 80 Ohms compared to the original 120 Ohms results in improved voltage regulation characteristics. This option is suitable for applications requiring enhanced reliability and thermal performance. Product status is Active with 2540 units in stock.

EDZVT2R27B (Rohm Semiconductor): This substitute maintains the original 150 mW power rating and operates across -55°C to 150°C. The part is from the active EDZV series with ROHS3 compliance and REACH Unaffected status. Impedance is specified at 150 Ohms, which is higher than the original but remains within acceptable regulation parameters. This option provides direct functional equivalence with extended temperature capability. Product status is Active with 5766 units in stock.

EDZVFHT2R27B (Rohm Semiconductor): This substitute also maintains 150 mW power rating and includes automotive-grade qualification (AEC-Q101). Operating temperature is specified to 150°C junction temperature. Impedance is 150 Ohms. This option is suitable for automotive applications requiring AEC qualification. Product status is Active with 11764 units in stock.

All three substitutes are available from active manufacturers, ensuring long-term supply continuity and support compared to the discontinued DZ2S270M0L.

Frequently Asked Questions (FAQ)

Q: Can BZX585-B27,115 be used as a direct replacement for DZ2S270M0L?

A: Yes. Both parts operate at 27 V nominal Zener voltage within compatible tolerance ranges and use identical SC-79/SOD-523 packaging. The BZX585-B27,115 provides 300 mW power capability, exceeding the original 150 mW specification, which is acceptable for substitution. The lower impedance (80 Ohms vs. 120 Ohms) improves voltage regulation performance.

Q: What is the difference between EDZVT2R27B and EDZVFHT2R27B?

A: Both parts are manufactured by Rohm Semiconductor and maintain 150 mW power rating with 27 V nominal Zener voltage. EDZVFHT2R27B carries automotive-grade qualification (AEC-Q101) and specifies operating temperature to 150°C junction temperature. EDZVT2R27B operates across -55°C to 150°C ambient range. Selection depends on whether automotive qualification is required for the application.

Q: Are all substitute parts compatible with the original PCB layout?

A: Yes. All substitute parts use SC-79 or SOD-523 package designations, which are mechanically and electrically compatible with the original SSMini2-F5-B footprint. No PCB redesign is required.

Q: What is the impact of impedance differences between the original and substitutes?

A: The original DZ2S270M0L specifies 120 Ohms maximum impedance. BZX585-B27,115 has 80 Ohms (lower), while both Rohm parts specify 150 Ohms (higher). Lower impedance improves voltage regulation and transient response. Higher impedance results in slightly softer regulation but remains within acceptable parameters for most applications. Impedance differences do not prevent substitution.

Q: Why is the BZX585-B27,115 rated for 300 mW instead of 150 mW?

A: The BZX585-B27,115 is designed for higher power dissipation applications. Using a higher-rated component in a 150 mW application provides thermal margin and extended component life. This is a conservative design practice and does not create compatibility issues.

Q: Are all substitutes RoHS compliant?

A: Yes. The original DZ2S270M0L is RoHS Compliant. All three substitute parts carry ROHS3 Compliant status, which represents the current RoHS directive standard and is backward compatible with RoHS Compliant requirements.

Q: What is the significance of AEC-Q100 and AEC-Q101 qualifications?

A: AEC-Q100 and AEC-Q101 are automotive electronics qualification standards. BZX585-B27,115 carries AEC-Q100 qualification, while EDZVFHT2R27B carries AEC-Q101. These qualifications are required only if the application is automotive-grade. For non-automotive applications, these qualifications provide additional assurance of component reliability but are not mandatory.

Q: Can I use these substitutes interchangeably in the same design?

A: Yes, within the constraints of your specific application requirements. All three substitutes meet the core electrical parameters of the original part. Selection should be based on: (1) required operating temperature range, (2) automotive qualification requirements, (3) power dissipation margin needed, and (4) impedance characteristics preferred for your voltage regulation circuit.

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