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Home > Products > Discrete Semiconductor Products > Diodes > Zener > Single Zener Diodes

Vishay General Semiconductor - Diodes Division SML4741-E3/61

Name: SML4741-E3/61
Brand: Vishay General Semiconductor - Diodes Division
SKU: SML4741-E3/61
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SML4741-E3/61

Manufacturer:: Vishay General Semiconductor - Diodes Division

Category:: Single Zener Diodes

Package:: DO-214AC, SMA

Datasheet:: SML4741-E3/61.pdf

Description:: DIODE ZENER 11V 1W DO214AC

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Product details

Overview

SML4741-E3/61 from Vishay Semiconductors is a surface-mount Zener diode with nominal zener voltage 11 V, 23 mA test current, ±10 % voltage tolerance, 8.4 Ω dynamic impedance at I_ZT, and 414 mApk surge current capability; used for precision voltage regulation and overvoltage protection in power supply feedback loops and reference circuits.

For engineers reviewing the SML4741-E3/61 datasheet, SML4741-E3/61 pinout, SML4741-E3/61 application, or SML4741-E3/61 equivalent, key selection criteria include zener voltage accuracy, low dynamic impedance under 23 mA bias, DO-214AC (SMA) package compatibility with automated SMT assembly, and AEC-Q101 qualification status for automotive-grade reliability.

Technical Context

This device operates as a single-junction, silicon-based Zener diode optimized for stable reverse-bias voltage regulation. Its construction enables low regulation factor and low zener impedance - critical for maintaining tight output voltage control in linear regulators and voltage references.

Designed for surface-mount applications on PCBs with standard 0.31" × 0.31" copper pads, it supports reflow soldering at 260 °C for 10 s at terminals and meets MSL Level 1 moisture sensitivity per J-STD-020, eliminating bake requirements prior to assembly.

Key Specifications

Parameter	Value and Actual Design Meaning
Zener Voltage (V_Z)	11 V nominal, ±10 % tolerance - defines precise clamping/reference level in feedback networks
Test Current (I_ZT)	23 mA - operating point where V_Z and dynamic impedance are specified and optimized
Dynamic Impedance (Z_Z)	8.4 Ω at I_ZT - ensures minimal voltage deviation under load transients
Power Dissipation (P_tot)	1000 mW at T_L = 75 °C - supports robust thermal performance on standard PCB copper areas
Surge Current (I_RM)	414 mApk (8.3 ms pulse) - withstands transient overvoltage events without degradation
Junction Temperature	150 °C maximum - enables operation in under-hood automotive and industrial environments
Package	DO-214AC (SMA) - industry-standard SMT footprint compatible with pick-and-place and reflow processes

Pinout & Package

DO-214AC (SMA) surface-mount package with cathode band marking; 64 mg weight; UL 94 V-0 flammability rating; MSL Level 1.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Forward conduction terminal / low-side connection in reverse-bias regulation	Connected to lower potential node when used as shunt regulator
Cathode	Zener breakdown terminal / high-side connection in reverse-bias regulation	Marked by band; connected to regulated voltage rail or feedback node

Key Features

Feature	Design Value
Low Zener impedance	8.4 Ω at 23 mA - minimizes output voltage variation across load changes
AEC-Q101 qualification	Qualified for automotive electronics - validated for temperature cycling, HTRB, and ESD robustness
High-temperature soldering guarantee	260 °C/10 s at terminals - ensures reliability through standard lead-free reflow profiles
UL 94 V-0 flammability rating	Plastic molding compound meets stringent fire-safety standards for enclosed systems
RoHS-compliant construction	E3 suffix indicates lead-free, halogen-free, and RoHS-2011/65/EU compliant materials

Applications

Automotive Power Management	Industrial Sensor Reference
Use Scenario: Voltage clamping in 12 V battery-supplied engine control unit (ECU) power rails during load dump events. IC Role / Device Role / Timing Role: Shunt regulator protecting downstream LDOs and microcontrollers from >40 V transients. Use Value: 414 mApk surge rating and 150 °C junction rating ensure survival in under-hood thermal and electrical stress conditions.	Use Scenario: Precision 11 V reference for 24-bit sigma-delta ADC front-end in process automation transmitters. IC Role / Device Role / Timing Role: Stable voltage reference source for analog signal conditioning circuitry. Use Value: ±10 % V_Z tolerance and 8.4 Ω dynamic impedance maintain reference stability across 10–30 mA bias range.
Consumer PSU Feedback Loop	Telecom DC-DC Monitoring
Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters. IC Role / Device Role / Timing Role: Zener element in optocoupler feedback network regulating +5 V/3 A output. Use Value: Low regulation factor ensures <±1 % output voltage drift over line/load/temperature variations.	Use Scenario: Overvoltage detection on +48 V intermediate bus in base station power modules. IC Role / Device Role / Timing Role: Threshold clamp triggering shutdown logic when bus exceeds 11.5 V. Use Value: Sharp reverse breakdown knee and 0.25 μA leakage at 8.8 V enable clean trip-point detection.

Automotive Power Management

Industrial Sensor Reference

Use Scenario: Voltage clamping in 12 V battery-supplied engine control unit (ECU) power rails during load dump events.

IC Role / Device Role / Timing Role: Shunt regulator protecting downstream LDOs and microcontrollers from >40 V transients.

Use Value: 414 mApk surge rating and 150 °C junction rating ensure survival in under-hood thermal and electrical stress conditions.

Use Scenario: Precision 11 V reference for 24-bit sigma-delta ADC front-end in process automation transmitters.

IC Role / Device Role / Timing Role: Stable voltage reference source for analog signal conditioning circuitry.

Use Value: ±10 % V_Z tolerance and 8.4 Ω dynamic impedance maintain reference stability across 10–30 mA bias range.

Consumer PSU Feedback Loop

Telecom DC-DC Monitoring

Use Scenario: Secondary-side voltage sensing in isolated flyback converters for USB-C PD adapters.

IC Role / Device Role / Timing Role: Zener element in optocoupler feedback network regulating +5 V/3 A output.

Use Value: Low regulation factor ensures <±1 % output voltage drift over line/load/temperature variations.

Use Scenario: Overvoltage detection on +48 V intermediate bus in base station power modules.

IC Role / Device Role / Timing Role: Threshold clamp triggering shutdown logic when bus exceeds 11.5 V.

Use Value: Sharp reverse breakdown knee and 0.25 μA leakage at 8.8 V enable clean trip-point detection.

Equivalent & Alternatives

The following parts are listed as comparable options for similar Zener diode applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
BZX84-C11LT1G	Same 11 V nominal V_Z, but SOT-23 package (smaller footprint), 15 Ω Z_Z, 350 mW P_tot	Lower power handling; suited for space-constrained portable electronics, not high-energy transients	Select when board area is critical and surge energy is <100 mJ
1N4741A	Through-hole DO-41 package, same 11 V/±5 % option available, 20 Ω Z_Z, 1 W P_tot	No SMT compatibility; requires wave soldering or hand assembly; higher thermal resistance	Select only for legacy through-hole designs or prototyping with breadboards

Compared with BZX84-C11LT1G and 1N4741A, the SML4741-E3/61 delivers superior surge immunity (414 mApk), lower dynamic impedance (8.4 Ω), and automotive-grade qualification - making it optimal for production SMT designs requiring reliability under thermal and electrical stress.

Availability

SML4741-E3/61 is available at Aetrix Electronics and suitable for automotive power management, industrial sensor reference, and consumer PSU feedback loop applications requiring stable component supply, consistent parametric performance, and long-term manufacturing continuity.

Supply support for SML4741-E3/61 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Vishay Intertechnology is a global semiconductor and passive component manufacturer specializing in discrete semiconductors, resistors, capacitors, and inductors with emphasis on reliability, precision, and high-power handling.

The SML47xx series is part of Vishay's surface-mount Zener diode product line engineered for stable voltage regulation in automotive, industrial, and computing power systems where compact size, thermal resilience, and AEC-Q101 compliance are mandatory.

FAQ

What is the zener voltage tolerance for SML4741-E3/61?

The SML4741-E3/61 has a nominal zener voltage of 11 V with a standard tolerance of ±10 %, as confirmed in the Vishay SML4728–SML4764A datasheet revision 1.9. This tolerance applies under standard test conditions (T_amb = 25 °C, I_ZT = 23 mA). The "E3" suffix denotes RoHS-compliant commercial grade; tighter ±5 % variants use the "A" suffix (e.g., SML4741A).

Is SML4741-E3/61 qualified for automotive applications?

Yes, the SML4741-E3/61 is RoHS-compliant and rated for commercial use; however, its AEC-Q101 qualified counterpart is the SML4741HE3/61 (with "HE3" suffix). The SML4741-E3/61 itself is not AEC-Q101 qualified - engineers requiring automotive qualification must specify the HE3 version, which undergoes additional stress testing per AEC-Q101 standards.

What is the maximum power dissipation of SML4741-E3/61 at 75 °C lead temperature?

The SML4741-E3/61 has a maximum continuous power dissipation (P_tot) of 1000 mW when the lead temperature (T_L) is maintained at 75 °C, as specified in the Absolute Maximum Ratings table. Derating begins above this temperature, reaching zero dissipation at 150 °C junction temperature - consistent with its 150 °C T_j rating.

What does the "/61" suffix mean in SML4741-E3/61?

The "/61" suffix in SML4741-E3/61 indicates packaging configuration: 1800 units per 7-inch plastic reel on 12 mm tape. This differs from the "/5A" variant, which ships in 7500-unit reels on 13-inch plastic reels. Both share identical electrical and thermal specifications; the suffix solely denotes reel size and quantity for SMT placement equipment compatibility.

What is the dynamic impedance of SML4741-E3/61 and why does it matter?

The dynamic impedance (Z_Z) of SML4741-E3/61 is 8.4 Ω measured at I_ZT = 23 mA. This low value directly determines how tightly the diode regulates voltage under varying load or input conditions - lower Z_Z means smaller output voltage deviations, which is essential for precision references and stable feedback loops in switching regulators.

SML4741-E3/61 Specifications

Product attributes: Attribute value

Manufacturer:: Vishay General Semiconductor - Diodes Division

Series:: -

Package/Case:: DO-214AC, SMA

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Zener (Nom) (Vz):: 11 V

Tolerance:: ±10%

Power - Max:: 1 W

Impedance (Max) (Zzt):: 8 Ohms

Current - Reverse Leakage @ Vr:: 5 µA @ 8.4 V

Voltage - Forward (Vf) (Max) @ If:: -

Operating Temperature:: 150°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: DO-214AC (SMA)

SML4741-E3/61 FAQ

1.How can I place an order for SML4741-E3/61 through Aetrix?

Please submit a Request for Quotation (RFQ) for SML4741-E3/61 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for SML4741-E3/61 reliable?

The price and inventory of SML4741-E3/61 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SML4741-E3/61 is usually 5 days.

3.What payment methods are accepted for SML4741-E3/61?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SML4741-E3/61 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SML4741-E3/61?

SML4741-E3/61 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SML4741-E3/61 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for SML4741-E3/61?

For technical support, including SML4741-E3/61 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SML4741-E3/61 requirements.

6.How does Aetrix verify that SML4741-E3/61 is sourced from the original manufacturer or authorized distributors?

All SML4741-E3/61 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SML4741-E3/61 meets industry standards.

7.What is the process for return or replacement of SML4741-E3/61?

All SML4741-E3/61 units undergo pre-shipment inspection (PSI). If there is an issue with SML4741-E3/61, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The SML4741-E3/61 part is unused and in its original packaging.

Return procedure for SML4741-E3/61:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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