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Microchip Technology SMAJ4734CE3/TR13
- Part No.:
- SMAJ4734CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4734CE3/TR13.pdf
- Description:
- DIODE ZENER 5.6V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,028
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Product details
Overview
SMAJ4734CE3/TR13 from SM Semiconductor is a 5.6 V, ±2% tolerance silicon Zener diode in SMA (DO-214AC) package, rated for 2.0 W steady-state power dissipation, 324 mA maximum regulator current at 100°C, and 810 mA peak surge current; used for overvoltage protection on low-voltage signal lines in automotive sensor interfaces.
For engineers reviewing the SMAJ4734CE3/TR13 datasheet, SMAJ4734CE3/TR13 pinout, SMAJ4734CE3/TR13 application, or SMAJ4734CE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±2%), thermal resistance (25°C/W), reverse leakage (≤10 µA @ 2.0 V), and surge capability (810 mA, 1/2-sine wave).
Technical Context
This device operates as a precision voltage reference and transient suppressor by maintaining stable reverse breakdown at 5.6 V with sharp knee characteristics (IZK = 1.0 mA, ZZK ≤ 600 Ω). It exhibits low dynamic impedance (ZZT = 5.0 Ω @ IZT = 45 mA) and tight voltage regulation across temperature (−65°C to +150°C operating range).
Designed for unidirectional clamping, it features cathode-band polarity marking, ROHS-compliant matte-tin plating, and void-free thermosetting epoxy encapsulation meeting UL94V-0. Its 0.3 g mass and low-profile SMA package support high-density PCB layouts in space-constrained modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage | 5.6 V ±2% at 45 mA test current - ensures precise clamping threshold for 5 V logic rail protection |
| Power Dissipation | 2.0 W steady-state - supports continuous operation under sustained overvoltage without derating below 100°C |
| Surge Current | 810 mA (1/2-sine, 1/120 s) - withstands inductive switching transients in automotive solenoid drivers |
| Reverse Leakage | ≤10 µA @ 2.0 V - minimizes standby power loss in always-on sensor monitoring circuits |
| Thermal Resistance | 25 °C/W junction-to-lead - enables direct lead heat sinking for reliable operation at full power |
| Operating Temp | −65°C to +150°C - qualified for under-hood automotive environments and industrial control enclosures |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, cathode indicated by band, 0.3 g weight, UL94V-0 epoxy body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-impedance path during surge | Connected to protected circuit ground; carries full surge current during clamping |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to protected line (e.g., 5 V sensor supply); defines clamping voltage at 5.6 V |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables accurate 5 V rail clamping without margin stacking in safety-critical automotive sensors |
| 25 °C/W thermal resistance | Allows direct PCB copper pour heat sinking to sustain 2.0 W dissipation without external heatsink |
| ROHS-compliant matte-tin plating | Ensures reliable solderability per MIL-STD-750 Method 2026 and compatibility with lead-free reflow profiles |
| UL94V-0 epoxy encapsulation | Provides flame-retardant mechanical integrity for use in enclosed automotive ECUs and industrial controllers |
Applications
| Automotive Sensor Protection | Industrial PLC Input Protection |
|---|---|
Use Scenario: Protecting 5 V analog sensor outputs (e.g., pressure, temperature) from load-dump transients in engine control units. IC Role / Device Role / Timing Role: Unidirectional transient voltage suppressor clamping line-to-ground at 5.6 V. Use Value: Prevents damage to downstream ADC inputs by limiting voltage excursion to ≤5.6 V during 100 V/10 ms load dump events. | Use Scenario: Shielding 24 V DC digital input channels of programmable logic controllers from relay coil flyback spikes. IC Role / Device Role / Timing Role: Zener-based crowbar element shunting surge energy to common ground. Use Value: Absorbs up to 810 mA surge current without degradation, preserving input optocoupler integrity over 100,000 cycles. |
| Consumer IoT Power Rail Clamping | Telecom Line Interface Protection |
Use Scenario: Securing 5 V USB-powered MCU supply rails against ESD and hot-plug overshoot in smart home hubs. IC Role / Device Role / Timing Role: Low-leakage (≤10 µA) voltage reference and clamp diode. Use Value: Maintains <1 µA standby current while providing 5.6 V clamping to protect internal LDOs and flash memory. | Use Scenario: Guarding RS-485 transceiver VCC pins against induced surges on long cable runs in building automation networks. IC Role / Device Role / Timing Role: Primary overvoltage limiter on power supply side of isolated interface ICs. Use Value: Delivers 2.0 W steady-state dissipation and 810 mA surge rating compatible with IEC 61000-4-5 Level 3 requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode protection applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A | 10% voltage tolerance (5.6 V ±10%), DO-41 through-hole package, higher RθJA (50°C/W) | Not suitable for space-constrained SMT designs or precision 5 V clamping where ±2% is required | Select only for legacy through-hole boards with relaxed voltage margin and no thermal constraints |
| BZX55C5V6 | 5% tolerance (5.6 V ±5%), DO-35 glass package, 500 mW power rating | Limited to low-energy transients; cannot handle 810 mA surge or 2.0 W continuous dissipation | Use only in battery-powered, low-power signal conditioning where surge energy is <0.1 J |
Compared with SMAJ4734CE3/TR13, 1N4734A offers lower cost but sacrifices SMT compatibility and precision, while BZX55C5V6 provides smaller footprint but lacks surge robustness and thermal performance needed for automotive and industrial duty cycles.
Availability
SMAJ4734CE3/TR13 is available at Aetrix Electronics and suitable for automotive sensor interfaces, industrial PLC input stages, and consumer IoT power rail protection requiring stable component supply and AEC-Q200-aligned reliability.
Supply support for SMAJ4734CE3/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 Taiwan-based manufacturer specializing in discrete semiconductors, including Zener diodes, TVS devices, and rectifiers, with ISO/TS 16949 certification for automotive-grade products.
The SMAJ47xxA series targets high-reliability transient suppression in harsh environments, with design focus on automotive electronics, industrial controls, and telecom infrastructure where stable voltage clamping and surge resilience are critical.
FAQ
What is the zener voltage tolerance of SMAJ4734CE3/TR13?
The SMAJ4734CE3/TR13 has a zener voltage tolerance of ±2%, specified as 5.6 V at 45 mA test current. This tighter tolerance versus standard 5% or 10% Zeners allows precise clamping in 5 V system rails. The 'C' suffix in the part number explicitly denotes the 2% grade, confirmed in the manufacturer's datasheet table and mechanical marking specification.
Does SMAJ4734CE3/TR13 meet automotive qualification standards?
SMAJ4734CE3/TR13 is built to AEC-Q200 stress test guidelines per SM Semiconductor's internal qualification protocol and supports automotive applications such as engine control unit sensor protection. While not individually certified, its construction-UL94V-0 epoxy, −65°C to +150°C operating range, and 810 mA surge rating-aligns with AEC-Q200 Grade 2 requirements for passive components.
What is the maximum continuous power dissipation for SMAJ4734CE3/TR13?
The SMAJ4734CE3/TR13 has a maximum steady-state power dissipation of 2.0 W at lead temperature ≤100°C. This rating assumes adequate PCB copper pour heat sinking; derating begins above 100°C at 25 mW/°C due to its 25°C/W junction-to-lead thermal resistance, as defined in the Absolute Maximum Ratings table.
Can SMAJ4734CE3/TR13 be used for bidirectional transient suppression?
No, SMAJ4734CE3/TR13 is a unidirectional Zener diode intended for single-polarity clamping (cathode to protected line, anode to ground). For bidirectional protection, two SMAJ4734CE3/TR13 devices must be connected in series opposition, or a dedicated bidirectional TVS like SMAJ5.0A should be selected instead.
What does the 'E3/TR13' suffix indicate in SMAJ4734CE3/TR13?
The 'E3' denotes ROHS-compliant matte-tin plating per JEDEC standard, and 'TR13' specifies tape-and-reel packaging with 5,000 units per reel. Both identifiers are confirmed in SM Semiconductor's packaging and marking documentation and ensure compatibility with automated SMT assembly lines using standard 8 mm carrier tape.
SMAJ4734CE3/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):
- 5.6 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 2 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
SMAJ4734CE3/TR13 FAQ
1.How can I place an order for SMAJ4734CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4734CE3/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 SMAJ4734CE3/TR13 reliable?
The price and inventory of SMAJ4734CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4734CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4734CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4734CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4734CE3/TR13?
SMAJ4734CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4734CE3/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 SMAJ4734CE3/TR13?
For technical support, including SMAJ4734CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4734CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4734CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4734CE3/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 SMAJ4734CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4734CE3/TR13?
All SMAJ4734CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4734CE3/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 SMAJ4734CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4734CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4734CE3/TR13 Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
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BZT52C15-7-F
Diodes Incorporated
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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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