SMAZ36-13 Zener Diode Equivalent & Substitute Parts

Part Overview

The SMAZ36-13 is a 36 V, 1 W surface mount zener diode manufactured by Diodes Incorporated in the DO-214AC (SMA) package. This component is designed for voltage regulation and protection applications requiring a nominal zener voltage of 36 V with ±5% tolerance. The SMAZ36-13 is currently discontinued at DiGi Electronics, necessitating identification of equivalent and substitute components that maintain electrical and mechanical compatibility with existing designs.

Key Parameters

Parameter	Value
Voltage - Zener (Nom)	36 V
Tolerance	±5%
Power - Max	1 W
Impedance (Max)	40 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 27.4 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C
Mounting Type	Surface Mount
Package / Case	DO-214AC, SMA
RoHS Status	RoHS non-compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the SMAZ36-13 zener diode is determined by the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nom): 36 V (exact match required)
Tolerance: ±5% (exact match required)
Power - Max: 1 W minimum (equal or greater acceptable)
Package / Case: DO-214AC, SMA (mechanical compatibility required)
Mounting Type: Surface Mount (required for PCB compatibility)

Secondary Compatibility Parameters:

Impedance (Max): 40 Ohms or lower (lower impedance acceptable)
Current - Reverse Leakage @ Vr: 500 nA @ 27.4 V or lower (lower leakage acceptable)
Voltage - Forward (Vf) (Max) @ If: 1.2 V @ 200 mA or lower (lower forward voltage acceptable)
Operating Temperature Range: -65°C ~ 150°C minimum (equal or wider range acceptable)

Substitute parts are classified into two categories: parametric equivalents (matching all primary criteria) and manufacturer-recommended alternatives (meeting primary criteria with variations in secondary parameters).

Parameter Comparison

Parameter	SMAZ36-13	SMAZ36-13-F	1SMA4753_R1_00001	SMAJ5938B-TP	SMAZ36-TP
Manufacturer	Diodes Incorporated	Diodes Incorporated	Panjit International Inc.	Micro Commercial Co	Micro Commercial Co
Voltage - Zener (Nom)	36 V	36 V	36 V	36 V	36 V
Tolerance	±5%	±5%	±5%	±5%	±5%
Power - Max	1 W	1 W	1 W	1.5 W	1 W
Impedance (Max)	40 Ohms	40 Ohms	50 Ohms	38 Ohms	40 Ohms
Current - Reverse Leakage @ Vr	500 nA @ 27.4 V	500 nA @ 27.4 V	100 nA @ 27.4 V	500 nA @ 27.4 V	500 nA @ 27.4 V
Voltage - Forward (Vf) (Max) @ If	1.2 V @ 200 mA	1.2 V @ 200 mA	Not specified	1.5 V @ 200 mA	1.2 V @ 200 mA
Operating Temperature Range	-65°C ~ 150°C	-65°C ~ 150°C	-55°C ~ 150°C	150°C	-65°C ~ 150°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Product Status	Discontinued	Active	Active	Active	Active
RoHS Status	RoHS non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SMAZ36-13-F (Diodes Incorporated)

The SMAZ36-13-F is a parametric equivalent to the SMAZ36-13, offering identical electrical specifications and operating temperature range. This part is manufactured by the same supplier as the original component and maintains full compatibility. The SMAZ36-13-F is currently in active production status with ROHS3 compliance, making it the primary recommended substitute for new designs and production continuity. Packaging is available in Cut Tape (CT) and Digi-Reel® formats with 25,100 units in stock.

SMAZ36-TP (Micro Commercial Co)

The SMAZ36-TP is a parametric equivalent manufactured by Micro Commercial Co, providing identical electrical performance to the SMAZ36-13 across all primary specifications. This part maintains the same 1 W power rating, 40 Ohms impedance, and -65°C ~ 150°C operating temperature range. The SMAZ36-TP is in active production with ROHS3 compliance and Tape & Reel packaging, with 7,896 units available.

1SMA4753_R1_00001 (Panjit International Inc.)

The 1SMA4753_R1_00001 meets all primary substitution criteria with 36 V nominal zener voltage, ±5% tolerance, and 1 W power rating in DO-214AC (SMA) package. This part exhibits superior reverse leakage characteristics (100 nA @ 27.4 V versus 500 nA), reducing standby current consumption. The operating temperature range is -55°C ~ 150°C, which is narrower than the original at the lower end. This part is in active production with ROHS3 compliance and Tape & Reel packaging, with 5,800 units in stock.

SMAJ5938B-TP (Micro Commercial Co)

The SMAJ5938B-TP is a manufacturer-recommended alternative with 36 V nominal zener voltage and ±5% tolerance. This part provides increased power dissipation capability at 1.5 W, exceeding the original 1 W specification. The impedance is 38 Ohms, which is lower than the original 40 Ohms specification. The forward voltage is specified at 1.5 V @ 200 mA, which is higher than the original 1.2 V. The operating temperature specification is listed as 150°C without a lower temperature limit. This part is in active production with ROHS3 compliance and Tape & Reel packaging, with 5,220 units in stock.

Frequently Asked Questions (FAQ)

Q: Can SMAZ36-13-F be used as a direct replacement for SMAZ36-13?

A: Yes. The SMAZ36-13-F is a parametric equivalent with identical voltage, tolerance, power rating, impedance, reverse leakage, forward voltage, and operating temperature specifications. Both parts use the DO-214AC (SMA) package and are surface mount components. The primary difference is product status: SMAZ36-13-F is in active production while SMAZ36-13 is discontinued.

Q: What is the difference between SMAZ36-TP and SMAZ36-13-F?

A: Both parts are parametric equivalents with identical electrical specifications. The primary differences are manufacturer (Micro Commercial Co versus Diodes Incorporated) and packaging format (Tape & Reel versus Cut Tape/Digi-Reel). Electrical performance and mechanical compatibility are equivalent.

Q: Can SMAJ5938B-TP replace SMAZ36-13 in all applications?

A: The SMAJ5938B-TP meets the primary substitution criteria of 36 V nominal voltage, ±5% tolerance, and DO-214AC (SMA) package. However, this part has a higher power rating (1.5 W versus 1 W) and higher forward voltage (1.5 V @ 200 mA versus 1.2 V @ 200 mA). The operating temperature specification lacks a defined lower limit. These differences may affect circuit performance in applications with tight thermal or voltage specifications.

Q: Why does 1SMA4753_R1_00001 have a narrower operating temperature range?

A: The 1SMA4753_R1_00001 is specified with an operating temperature range of -55°C ~ 150°C, compared to the original -65°C ~ 150°C. This represents a 10°C reduction in the lower temperature limit. Applications requiring operation below -55°C must use alternative substitutes such as SMAZ36-13-F or SMAZ36-TP.

Q: Are all substitute parts RoHS compliant?

A: The original SMAZ36-13 is RoHS non-compliant. All substitute parts (SMAZ36-13-F, 1SMA4753_R1_00001, SMAJ5938B-TP, and SMAZ36-TP) are ROHS3 compliant. This compliance status must be verified against design requirements for new product development.

Q: What is the significance of impedance differences between substitute parts?

A: Impedance (Zzt) affects the dynamic response of the zener diode to transient voltage changes. The original SMAZ36-13 specifies 40 Ohms maximum impedance. Substitute parts with lower impedance (SMAJ5938B-TP at 38 Ohms) provide faster transient response. The 1SMA4753_R1_00001 at 50 Ohms maximum impedance has slightly slower transient response. Applications with stringent transient suppression requirements should consider impedance specifications.

Q: Can substitute parts be mixed in the same production batch?

A: All substitute parts maintain identical nominal zener voltage (36 V) and tolerance (±5%), ensuring functional compatibility within the same circuit. However, differences in impedance, forward voltage, and reverse leakage may result in minor variations in circuit performance. Design validation should confirm acceptable performance across the specified parameter ranges of all substitute parts used in production.

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