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Microchip Technology SMAJ4741AE3/TR13
- Part No.:
- SMAJ4741AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4741AE3/TR13.pdf
- Description:
- DIODE ZENER 11V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:3,354
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Product details
Overview
SMAJ4741AE3/TR13 from SM Semiconductor is a 11.0 V, 5% tolerance Zener diode in SMA (DO-214AC) package, rated for 2.0 W steady-state power dissipation, 8.0 Ω dynamic impedance at 23 mA test current, and 414 mA maximum regulator current at 100°C junction temperature - used for precision voltage regulation and transient overvoltage clamping in low-profile power rails.
For engineers reviewing the SMAJ4741AE3/TR13 datasheet, SMAJ4741AE3/TR13 pinout, SMAJ4741AE3/TR13 application, or SMAJ4741AE3/TR13 equivalent, key selection criteria include zener voltage tolerance, surge current capability (414 mA @ 100°C), thermal resistance (25 °C/W), reverse leakage (5 µA @ 8.4 V), and DO-214AC mechanical compatibility with high-density PCB layouts.
Technical Context
This device operates as a silicon planar Zener diode optimized for stable voltage reference and transient suppression in DC power conditioning circuits. It exhibits a sharp breakdown knee (IZK = 0.25 mA), low dynamic impedance (8.0 Ω), and regulated operation across -65°C to +150°C ambient range.
Its thermal design relies on junction-to-lead resistance of 25 °C/W, enabling reliable 2.0 W power handling when mounted with adequate copper pour or heat sinking. The cathode band polarity marking and ROHS-compliant matte-tin plating support automated assembly and IPC-compliant soldering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 11.0 V ±5% at 23 mA - defines precise clamping threshold for 12 V rail protection |
| Power Dissipation PM(AV) | 2.0 W continuous - supports sustained regulation without derating below 100°C |
| Dynamic Impedance ZZT | 8.0 Ω at IZT = 23 mA - ensures minimal voltage shift under load variation |
| Max Regulator Current IZM | 414 mA at TJ = 100°C - sets upper limit for steady-state current sourcing capability |
| Reverse Leakage IR | 5 µA at VR = 8.4 V - guarantees low standby power loss in always-on circuits |
| Thermal Resistance RθJL | 25 °C/W - enables thermal design with standard PCB copper land (≥25 mm²) |
| Surge Current Izsm | 414 mA (1/2 sine wave, 1/120 s) - validates single-pulse transient immunity per IEC 61000-4-5 |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, void-free thermosetting epoxy case with cathode band marking; weight ≈ 0.3 g.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink terminal during forward bias | Connected to lower-potential node (e.g., GND or return path) in clamp configuration |
| Cathode | Current source terminal during reverse breakdown | Connected to protected line (e.g., 12 V rail); band identifies this terminal |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Enables tighter regulation than 10% variants (e.g., SMAJ4741) in feedback loops requiring <±6% error margin |
| 2.0 W power rating | Supports higher energy absorption than 1.0 W Zeners (e.g., 1N4741A) in repetitive surge environments |
| Low knee impedance (0.25 mA IZK) | Ensures stable turn-on behavior below 1 mA, critical for low-current sensor biasing |
| ROHS-compliant matte-tin plating | Guarantees solderability per MIL-STD-750 Method 2026 and eliminates lead-based reflow concerns |
| UL94V-0 epoxy body | Meets flammability safety requirements for industrial and automotive control module enclosures |
Applications
| Automotive Power Rail Protection | Industrial Sensor Signal Conditioning |
|---|---|
Use Scenario: Clamping transients on 12 V battery-fed ECUs exposed to load-dump events per ISO 7637-2. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage limiter on microcontroller power input. Use Value: Limits peak voltage to ≤13.2 V (11.0 V × 1.2) during 100 ms surges, preventing brownout or latch-up in 3.3 V logic supplies. | Use Scenario: Stabilizing excitation voltage for bridge-based pressure sensors in PLC analog input modules. IC Role / Device Role / Timing Role: Precision voltage reference providing 11.0 V ±5% bias to Wheatstone bridge. Use Value: Maintains bridge output linearity within ±0.5% full-scale error across -40°C to +85°C ambient due to low tempco Zener construction. |
| Consumer USB-C Power Adapter Feedback | Telecom Line Interface Transient Suppression |
Use Scenario: Secondary-side voltage reference in flyback converter feedback network for 5–20 V USB PD adapters. IC Role / Device Role / Timing Role: Zener element setting optocoupler LED current threshold in TL431-assisted regulation loop. Use Value: Enables ±1.5% output voltage accuracy over line/load/temperature with 8.0 Ω dynamic impedance minimizing feedback ripple coupling. | Use Scenario: Protecting RS-485 transceiver I/O pins against ESD and lightning-induced surges in base station backhaul links. IC Role / Device Role / Timing Role: Low-capacitance transient voltage suppressor placed directly at connector interface. Use Value: Absorbs 414 mA surge pulses without degradation, maintaining signal integrity up to 10 Mbps while adding <0.5 pF parasitic capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4741A | Same 11 V nominal voltage but 10% tolerance; TO-204AA (DO-41) axial package | Requires through-hole mounting; higher thermal resistance (65 °C/W) limits power handling | Select when legacy through-hole assembly or lower-cost procurement outweighs SMT density and thermal performance |
| BZX84-C11 | 11 V ±5%, SOT-23 package; 350 mW rating; 15 Ω dynamic impedance at 5 mA | Lower power and higher impedance unsuitable for >100 mA regulation; better for signal-level biasing | Select for space-constrained signal-path references where 2.0 W clamping is unnecessary |
Compared with 1N4741A and BZX84-C11, SMAJ4741AE3/TR13 delivers superior thermal performance (25 °C/W vs. 65 °C/W), higher surge robustness (414 mA vs. ~100 mA), and SMT compatibility - making it optimal for modern high-density 12 V rail protection where reliability and board area matter.
Availability
SMAJ4741AE3/TR13 is available at Aetrix Electronics and suitable for automotive ECU power conditioning, industrial sensor excitation, USB-C adapter feedback networks, and telecom line interface protection requiring stable component supply and traceable sourcing.
Supply support for SMAJ4741AE3/TR13 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
SM Semiconductor is a fabless analog component manufacturer specializing in discrete protection and regulation devices for industrial and automotive markets.
The SMAJ47xxA series was designed specifically for high-reliability, surface-mount Zener regulation in space-constrained power systems where thermal stability and surge immunity are critical.
FAQ
What is the Zener voltage tolerance of SMAJ4741AE3/TR13?
The SMAJ4741AE3/TR13 has a nominal Zener voltage of 11.0 V with a ±5% tolerance, as confirmed by the "A" suffix in its part number per the manufacturer's documentation. This tighter tolerance enables more accurate voltage regulation compared to 10% variants like SMAJ4741. The SMAJ4741AE3/TR13 maintains this specification at the standard test current of 23 mA and 25°C ambient temperature.
What package type does SMAJ4741AE3/TR13 use?
SMAJ4741AE3/TR13 uses the SMA (DO-214AC) surface-mount package, characterized by a void-free thermosetting epoxy body compliant with UL94V-0, matte-tin plated terminals, and cathode identification via a visible band. Its dimensions and mechanical data match the industry-standard DO-214AC footprint, ensuring compatibility with automated pick-and-place equipment and reflow profiles.
What is the maximum steady-state power dissipation for SMAJ4741AE3/TR13?
The SMAJ4741AE3/TR13 is rated for 2.0 W of steady-state power dissipation (PM(AV)) under specified thermal conditions. This rating assumes proper PCB thermal management - specifically, a junction-to-lead thermal resistance of 25 °C/W - and is valid across the full operating temperature range of -65°C to +150°C.
How much reverse leakage current does SMAJ4741AE3/TR13 exhibit at 8.4 V?
At a reverse voltage of 8.4 V (76% of nominal 11.0 V), the SMAJ4741AE3/TR13 exhibits a maximum reverse leakage current (IR) of 5 µA, as specified in Table 1 of the official datasheet. This low leakage supports energy-efficient operation in always-on monitoring circuits and minimizes loading effects on high-impedance bias networks.
What is the dynamic impedance of SMAJ4741AE3/TR13 and why does it matter?
The SMAJ4741AE3/TR13 has a maximum dynamic impedance (ZZT) of 8.0 Ω measured at the 23 mA test current (IZT). This parameter quantifies how tightly the Zener voltage is maintained under varying load currents - lower ZZT means less voltage deviation, which is essential for stable reference generation in feedback loops and precision clamping applications involving the SMAJ4741AE3/TR13.
SMAJ4741AE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-214AC, SMA
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 11 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 8.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -55°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC
SMAJ4741AE3/TR13 FAQ
1.How can I place an order for SMAJ4741AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4741AE3/TR13 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 SMAJ4741AE3/TR13 reliable?
The price and inventory of SMAJ4741AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4741AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4741AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4741AE3/TR13 transactions.
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4.How is shipping managed for SMAJ4741AE3/TR13?
SMAJ4741AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4741AE3/TR13 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 SMAJ4741AE3/TR13?
For technical support, including SMAJ4741AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4741AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4741AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4741AE3/TR13 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 SMAJ4741AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4741AE3/TR13?
All SMAJ4741AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4741AE3/TR13, 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 SMAJ4741AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4741AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4741AE3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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