SML4741A-E3/5A Zener Diode Equivalent & Substitute Parts

Part Overview

The SML4741A-E3/5A is an 11 V, 1 W Zener diode manufactured by Vishay General Semiconductor - Diodes Division in Surface Mount DO-214AC (SMA) package format. This component is classified as an active product with ROHS3 compliance and unlimited moisture sensitivity rating (MSL 1). The part is supplied in Tape & Reel packaging with 713 pieces currently in stock.

Equivalent and substitute parts are identified to address inventory availability, lead time constraints, or specific application requirements while maintaining electrical and mechanical compatibility within the defined parameter tolerances.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	11	V
Power - Maximum	1	W
Tolerance	±5%	%
Impedance (Maximum)	8	Ohms
Current - Reverse Leakage @ Vr	5	µA @ 8.4 V
Operating Temperature	150	°C
Package / Case	DO-214AC, SMA	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitute parts for the SML4741A-E3/5A are grouped into two categories based on electrical parameter alignment:

Category 1: Parametric Equivalent The SML4741A-E3/61 is a parametric equivalent manufactured by the same supplier (Vishay General Semiconductor - Diodes Division). This part maintains identical electrical specifications across all critical parameters: 11 V nominal Zener voltage, ±5% tolerance, 1 W maximum power, 8 Ohms maximum impedance, 5 µA reverse leakage current at 8.4 V, and 150°C operating temperature. The only distinction is the packaging reel designation (61 versus 5A). Both parts share the same base product number (SML4741) and are supplied in DO-214AC (SMA) package format.

Category 2: Manufacturer Recommended Substitutes The SMAJ5926B-TP (Micro Commercial Co) and SZ1SMA5926BT3G (onsemi) are manufacturer-recommended substitutes that maintain the 11 V nominal Zener voltage and ±5% tolerance but differ in power rating (1.5 W versus 1 W) and impedance characteristics (5.5 Ohms versus 8 Ohms). These parts are electrically compatible for applications requiring the specified Zener voltage and tolerance, with enhanced power dissipation capability. The SZ1SMA5926BT3G includes automotive-grade qualification (AEC-Q101) and extended operating temperature range (−65°C to 150°C).

Substitution eligibility is determined by:

Nominal Zener voltage: 11 V (required match)
Tolerance: ±5% (required match)
Package / Case: DO-214AC, SMA (required match)
Mounting Type: Surface Mount (required match)
RoHS Status: ROHS3 Compliant (required match)

Parameter Comparison

Parameter	SML4741A-E3/5A	SML4741A-E3/61	SMAJ5926B-TP	SZ1SMA5926BT3G
Manufacturer	Vishay General Semiconductor	Vishay General Semiconductor	Micro Commercial Co	onsemi
Voltage - Zener (Nom)	11 V	11 V	11 V	11 V
Tolerance	±5%	±5%	±5%	—
Power - Max	1 W	1 W	1.5 W	1.5 W
Impedance (Max)	8 Ohms	8 Ohms	5.5 Ohms	5.5 Ohms
Current - Reverse Leakage @ Vr	5 µA @ 8.4 V	5 µA @ 8.4 V	500 nA @ 8.4 V	500 nA @ 8.4 V
Operating Temperature	150°C	150°C	150°C	−65°C to 150°C
Package / Case	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA	DO-214AC, SMA
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Product Status	Active	Active	Active	Active
Automotive Grade	—	—	—	AEC-Q101

Engineering Selection Recommendations

SML4741A-E3/61 Selection The SML4741A-E3/61 is the direct parametric equivalent for the SML4741A-E3/5A. Both parts are manufactured by Vishay General Semiconductor - Diodes Division and maintain identical electrical specifications. Selection of this substitute is appropriate when the primary concern is inventory availability or lead time, as the part carries significantly higher stock levels (39,700 pieces versus 713 pieces). Both parts are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1).

SMAJ5926B-TP Selection The SMAJ5926B-TP manufactured by Micro Commercial Co is suitable for applications where enhanced power dissipation is beneficial. This part maintains the required 11 V nominal Zener voltage and ±5% tolerance while providing 1.5 W maximum power rating and lower impedance (5.5 Ohms). The reverse leakage current is significantly lower (500 nA versus 5 µA at 8.4 V). This part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1) and is suitable for general industrial applications.

SZ1SMA5926BT3G Selection The SZ1SMA5926BT3G manufactured by onsemi is the appropriate choice for automotive applications. This part maintains the 11 V nominal Zener voltage and 1.5 W power rating while providing extended operating temperature range (−65°C to 150°C) and automotive-grade qualification (AEC-Q101). The part is ROHS3 compliant with unlimited moisture sensitivity rating (MSL 1). Selection of this substitute is required when AEC-Q101 qualification or automotive-grade reliability standards are specified in the application requirements.

Frequently Asked Questions (FAQ)

Q: Can the SML4741A-E3/61 be used as a direct replacement for the SML4741A-E3/5A?

A: Yes. The SML4741A-E3/61 is a parametric equivalent with identical electrical specifications. Both parts share the same base product number (SML4741), nominal Zener voltage (11 V), tolerance (±5%), maximum power (1 W), impedance (8 Ohms), reverse leakage current (5 µA @ 8.4 V), and operating temperature (150°C). The difference is the packaging reel designation. Both are supplied in DO-214AC (SMA) Surface Mount package format.

Q: What are the differences between the 1 W and 1.5 W power-rated substitutes?

A: The SMAJ5926B-TP and SZ1SMA5926BT3G both provide 1.5 W maximum power dissipation compared to the 1 W rating of the SML4741A-E3/5A. These higher-power variants also feature lower impedance (5.5 Ohms versus 8 Ohms) and significantly lower reverse leakage current (500 nA versus 5 µA at 8.4 V). All three parts maintain the same 11 V nominal Zener voltage and ±5% tolerance. The higher power rating provides additional thermal margin in applications with higher current demands.

Q: Is the SZ1SMA5926BT3G suitable for non-automotive applications?

A: Yes. The SZ1SMA5926BT3G meets all electrical and mechanical requirements for general industrial applications. The automotive-grade qualification (AEC-Q101) and extended operating temperature range (−65°C to 150°C) represent additional capabilities beyond the base requirements. This part is ROHS3 compliant and carries unlimited moisture sensitivity rating (MSL 1), making it suitable for any application requiring an 11 V Zener diode in DO-214AC (SMA) package format.

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

A: Yes. All substitute parts—SML4741A-E3/61, SMAJ5926B-TP, and SZ1SMA5926BT3G—are supplied in DO-214AC (SMA) Surface Mount package format. This ensures mechanical and electrical compatibility with existing PCB designs and assembly processes.

Q: What compliance certifications apply to all substitute parts?

A: All parts listed (SML4741A-E3/5A, SML4741A-E3/61, SMAJ5926B-TP, and SZ1SMA5926BT3G) are ROHS3 compliant and carry unlimited moisture sensitivity rating (MSL 1). The SZ1SMA5926BT3G additionally carries AEC-Q101 automotive-grade qualification. All parts are classified as REACH Unaffected and carry ECCN EAR99 designation.

Q: Can the higher-power substitutes be used in circuits designed for the 1 W part?

A: Yes. The SMAJ5926B-TP and SZ1SMA5926BT3G maintain the same 11 V nominal Zener voltage and ±5% tolerance as the SML4741A-E3/5A. The higher power rating (1.5 W) and lower impedance (5.5 Ohms) are backward-compatible with circuits designed for the 1 W part. The lower reverse leakage current (500 nA versus 5 µA) represents an improvement in performance characteristics.

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