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Microchip Technology SMAJ4736CE3/TR13
- Part No.:
- SMAJ4736CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4736CE3/TR13.pdf
- Description:
- DIODE ZENER 6.8V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:9,756
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Product details
Overview
SMAJ4736CE3/TR13 from SM Semiconductor is a 6.8 V, ±2% tolerance Zener diode in SMA (DO-214AC) package, rated for 2.0 W steady-state power dissipation and 266 mA maximum regulator current at 100°C junction temperature, used for precision voltage regulation and transient overvoltage clamping in low-profile power supply rails.
For engineers reviewing the SMAJ4736CE3/TR13 datasheet, SMAJ4736CE3/TR13 pinout, SMAJ4736CE3/TR13 application, or SMAJ4736CE3/TR13 equivalent, key selection criteria include zener voltage tolerance (±2%), thermal resistance (25°C/W), surge current capability (660 mA), and ROHS-compliant matte-tin plating for reliable solderability.
Technical Context
This device operates as a silicon planar Zener diode with sharp breakdown knee and stable regulation across 1.0 mA to 266 mA operating current range. Its 6.8 V nominal zener voltage is specified at 37 mA test current (IZT), with dynamic impedance of 3.5 Ω and knee impedance of 700 Ω at 1.0 mA.
Designed for unidirectional transient voltage suppression, it features cathode band polarity marking, void-free thermosetting epoxy case (UL94V-0), and thermal performance validated over -65°C to +150°C operating and storage temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 6.8 V ±2% at 37 mA - ensures tight regulation tolerance for reference and clamp circuits |
| Power Dissipation PM(AV) | 2.0 W - supports continuous operation in compact PCB layouts with adequate lead heat sinking |
| Max Regulator Current IZM | 266 mA at TJ = 100°C - defines maximum DC current before thermal derating limits regulation stability |
| Surge Current Izsm | 660 mA - withstands 1/2-sine wave transients per MIL-STD-750 Method 3012 |
| Thermal Resistance RθJL | 25 °C/W - enables direct junction-to-lead thermal path for predictable thermal design |
| Reverse Leakage IR | 10 µA max at VR = 4.0 V - guarantees low standby power loss in high-impedance bias networks |
| Forward Voltage VF | 1.2 V max at 200 mA - confirms low conduction loss during forward-biased fault conditions |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, axial-lead compatible, cathode indicated by band, 0.3 g typical weight, UL94V-0 epoxy body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current entry terminal in forward bias | Connected to lower-potential node; enables forward conduction path for fault current diversion |
| Cathode | Current exit terminal in forward bias; zener breakdown terminal in reverse bias | Marked by band; connected to regulated or clamped node; defines reference polarity for voltage stabilization |
Key Features
| Feature | Design Value |
|---|---|
| ±2% zener voltage tolerance | Enables precise voltage reference generation without external trimming in feedback loops |
| 2.0 W steady-state power rating | Supports sustained clamping in 5–12 V rail protection without forced airflow or heatsinking |
| ROHS-compliant matte-tin plating | Ensures consistent wetting and intermetallic formation during reflow or hand-soldering per MIL-STD-750 Method 2026 |
| Sharp breakdown knee (IZK = 1.0 mA) | Delivers stable regulation onset at low currents, critical for battery-powered sensor bias networks |
Applications
| Industrial Sensor Signal Conditioning | Automotive Body Control Module Power Rail |
|---|---|
Use Scenario: Protecting analog front-end inputs of 24-bit ADCs in factory-floor pressure transmitters from ESD and switching transients. IC Role / Device Role / Timing Role: Zener clamp placed between signal line and ground to limit excursion to ≤6.8 V while preserving signal integrity. Use Value: ±2% tolerance ensures clamping threshold remains within ADC input common-mode range under temperature drift. | Use Scenario: Stabilizing 5 V microcontroller supply in BCM modules exposed to load-dump events up to ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Shunt regulator parallel to LDO output to absorb transient energy exceeding LDO's internal current limit. Use Value: 660 mA surge rating handles 100 ms pulses without degradation, verified per AEC-Q101 stress testing. |
| Consumer USB-C Power Delivery Interface | Telecom DSL Line Driver Protection |
Use Scenario: Clamping VBUS monitor node in USB-C PD controllers against hot-plug overshoot and cable-induced ringing. IC Role / Device Role / Timing Role: Fast-response shunt element referenced to system ground, placed adjacent to PD controller sense pin. Use Value: 25 °C/W thermal resistance allows direct copper pour connection to reduce thermal impedance below 40 °C/W in 2-layer boards. | Use Scenario: Safeguarding line driver ICs in ADSL2+ modems from lightning-induced surges on twisted-pair telephone lines. IC Role / Device Role / Timing Role: Primary overvoltage suppressor in series with transformer secondary, before line driver input stage. Use Value: 700 Ω knee impedance ensures minimal loading on 100 Ω differential line during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| BZX84-C6V8LT1G | 300 mW SOT-23 package; ±5% tolerance; higher ZZT (15 Ω); 100 mA IZM | Lower power handling limits use to signal-level clamping only, not rail regulation | Select when board space is constrained and surge energy is <10 mJ |
| 1N4736A | DO-41 through-hole; same 6.8 V ±5%; 1.0 W rating; 330 mA IZM; no ROHS option | Requires axial-leaded footprint; unsuitable for automated SMT assembly | Select for legacy repair or prototyping where manual soldering is acceptable |
Compared with SMAJ4736CE3/TR13, BZX84-C6V8LT1G trades power and precision for miniaturization, while 1N4736A retains voltage spec but sacrifices SMT compatibility and environmental compliance-making SMAJ4736CE3/TR13 optimal for production-grade, ROHS-compliant, medium-power regulation.
Availability
SMAJ4736CE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor conditioning, automotive body control modules, and telecom line driver protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ4736CE3/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 9001-certified production and AEC-Q101 qualified automotive products.
The SMAJ47xxA series targets high-reliability voltage regulation and transient suppression in space-constrained applications, emphasizing tight tolerance, robust surge capability, and ROHS-compliant packaging for global electronics manufacturing.
FAQ
What is the zener voltage tolerance of SMAJ4736CE3/TR13?
The SMAJ4736CE3/TR13 has a zener voltage tolerance of ±2%, denoted by the "C" suffix in its part number per the manufacturer's documentation. This means its measured breakdown voltage at 37 mA test current falls within 6.664 V to 6.936 V at 25°C. The tighter tolerance improves accuracy in voltage reference and clamping applications compared to standard ±5% variants like SMAJ4736A.
Does SMAJ4736CE3/TR13 meet ROHS requirements?
Yes, SMAJ4736CE3/TR13 uses ROHS-compliant annealed matte-tin plating on its terminals, as confirmed in the official datasheet. It satisfies JEDEC J-STD-609 Category 1 marking and passes solderability testing per MIL-STD-750 Method 2026. No lead or cadmium is present above threshold limits, making it suitable for environmentally regulated markets including EU and China RoHS.
What is the maximum surge current rating for SMAJ4736CE3/TR13?
The SMAJ4736CE3/TR13 is rated for a peak surge current (Izsm) of 660 mA, measured using a 1/2 sine-wave pulse of 1/120 second duration at 25°C ambient. This value corresponds to the device's ability to absorb transient energy without parametric shift or failure, and is validated per industry-standard surge test methods referenced in the datasheet.
Can SMAJ4736CE3/TR13 be used as a replacement for SMAJ4736A?
Yes, SMAJ4736CE3/TR13 can replace SMAJ4736A in most designs, with improved zener voltage tolerance (±2% vs. ±5%) and identical package, power rating, and thermal characteristics. However, designers should verify that the tighter tolerance does not cause unintended interaction in feedback loops calibrated for the wider tolerance band of SMAJ4736A.
What is the thermal resistance junction-to-lead for SMAJ4736CE3/TR13?
The thermal resistance junction-to-lead (RθJL) of SMAJ4736CE3/TR13 is 25°C/W, as specified in the Absolute Maximum Ratings table. This parameter quantifies the thermal path efficiency from the silicon die to the device leads and directly impacts safe operating current derating-e.g., at 100°C junction temperature, the device sustains 266 mA continuously when leads are adequately heat-sunk.
SMAJ4736CE3/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):
- 6.8 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 3.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 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
SMAJ4736CE3/TR13 FAQ
1.How can I place an order for SMAJ4736CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4736CE3/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 SMAJ4736CE3/TR13 reliable?
The price and inventory of SMAJ4736CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4736CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4736CE3/TR13?
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4.How is shipping managed for SMAJ4736CE3/TR13?
SMAJ4736CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4736CE3/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 SMAJ4736CE3/TR13?
For technical support, including SMAJ4736CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4736CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4736CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4736CE3/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 SMAJ4736CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4736CE3/TR13?
All SMAJ4736CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4736CE3/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 SMAJ4736CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4736CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4736CE3/TR13 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
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