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Microchip Technology SMAJ4754CE3/TR13
- Part No.:
- SMAJ4754CE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4754CE3/TR13.pdf
- Description:
- DIODE ZENER 39V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,567
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Product details
Overview
SMAJ4754CE3/TR13 from Vishay Semiconductor is a 39 V, ±2% tolerance, 2 W surface-mount Zener diode in DO-214AC (SMA) package, rated for 115 mA maximum regulator current at 100°C and 60 Ω dynamic impedance at 6.5 mA test current, used for precision voltage regulation and overvoltage protection in power supply rails.
For engineers reviewing the SMAJ4754CE3/TR13 datasheet, SMAJ4754CE3/TR13 pinout, SMAJ4754CE3/TR13 application, or SMAJ4754CE3/TR13 equivalent, key selection factors include its tight 2% voltage tolerance, 2 W steady-state dissipation on 4 mm² copper pads, low 0.25 mA maximum reverse leakage at 29.7 V, and JEDEC DO-214AC mechanical compatibility with automated SMT placement.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage under varying load and temperature conditions. Its 39 V nominal zener voltage is specified at thermal equilibrium (90 s after DC current application), with sharp knee characteristics verified by dual-point impedance measurement per Note 2.
The device supports high-surge capability (115 mA peak surge current at 25°C) and is rated for operation from –55°C to +150°C. Polarity is marked by a cathode band, and terminals meet MIL-STD-750 solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 39 V ±2% - precise regulation point for 3.3 V–100 V range applications |
| Test Current (IZT) | 6.5 mA - standard bias condition for voltage and impedance specification |
| Dynamic Impedance (ZZT) | 60 Ω @ 6.5 mA - low AC resistance ensures minimal output voltage variation under load transients |
| Max Reverse Leakage (IR) | 0.25 µA @ 29.7 V - ultra-low leakage preserves accuracy in high-impedance reference circuits |
| Steady-State Power (PAV) | 2.0 W - requires 4.0 mm² copper pad per terminal for thermal management |
| Surge Current (IS) | 115 mA - withstands short-duration overvoltage events per ½-sine wave test |
| Operating Temperature | –55°C to +150°C - suitable for automotive under-hood and industrial control environments |
Pinout & Package
DO-214AC (SMA) package: surface-mount, flat handling surface for accurate placement, cathode indicated by band, polarity-sensitive, compliant with UL94V-0 flame-retardant epoxy.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased regulation configuration |
| Cathode | Zener breakdown terminal | Marked by band; connected to higher-potential rail to clamp overvoltage |
Key Features
| Feature | Design Value |
|---|---|
| ±2% Zener voltage tolerance | Enables tighter regulation margins than standard 5% parts (e.g., SMAJ4754A), reducing need for post-regulation trimming |
| 2 W power dissipation rating | Supports robust transient suppression without derating below 100°C when mounted on 4 mm² copper pads |
| JEDEC DO-214AC mechanical compliance | Ensures compatibility with standard SMA footprint and pick-and-place tooling across manufacturing lines |
| Low 0.25 µA reverse leakage at 76% VZ | Minimizes error in precision reference circuits where leakage current affects divider accuracy |
Applications
| Industrial Power Supply Protection | Automotive ECU Voltage Clamping |
|---|---|
Use Scenario: Protecting 3.3 V and 5 V logic rails from load-dump transients in programmable logic controllers. IC Role / Device Role / Timing Role: Zener clamping element placed between rail and ground to shunt excess energy during overvoltage events. Use Value: 39 V breakdown voltage provides safe margin above 24 V nominal system voltage while limiting peak rail excursion to ≤42 V. | Use Scenario: Stabilizing reference voltage for analog sensor interfaces in engine control units operating at ambient up to 125°C. IC Role / Device Role / Timing Role: Precision voltage reference source for ADC biasing and op-amp feedback networks. Use Value: ±2% tolerance and <0.25 µA leakage ensure reference stability within 0.8% total error across temperature and time. |
| Telecom DC-DC Converter Feedback | Medical Instrument Overvoltage Guard |
Use Scenario: Providing feedback reference for isolated flyback converters in base station power modules. IC Role / Device Role / Timing Role: Secondary-side Zener reference in optocoupler-coupled feedback loop. Use Value: 60 Ω dynamic impedance minimizes regulation error under dynamic load steps, improving output voltage accuracy to ±1.2%. | Use Scenario: Safeguarding microcontroller I/O pins against ESD-induced voltage spikes in portable diagnostic devices. IC Role / Device Role / Timing Role: Low-capacitance overvoltage clamp on analog front-end signal lines. Use Value: Fast response to 115 mA surge current limits transient duration to <10 µs, preventing latch-up in sensitive CMOS inputs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4754A | Same 39 V nominal voltage but ±5% tolerance; DO-41 through-hole package | Requires PCB redesign for through-hole mounting; higher leakage (10 µA @ 29.7 V) | Select only if legacy through-hole assembly or cost sensitivity outweighs precision and SMT compatibility needs |
| BZX84-C39 | 39 V ±5%, 300 mW rating, SOT-23 package, 90 Ω ZZT @ 5 mA | Limited to low-power biasing due to 0.3 W dissipation; unsuitable for >50 mA regulation loads | Prefer for space-constrained low-current references where thermal budget prohibits 2 W devices |
Compared with 1N4754A and BZX84-C39, SMAJ4754CE3/TR13 delivers tighter voltage control, higher surge resilience, and SMT-ready packaging-making it optimal for industrial and automotive designs requiring stable 2 W regulation without layout changes.
Availability
SMAJ4754CE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom DC-DC converters, and medical instrument protection requiring stable component supply with full traceability and lifecycle support.
Supply support for SMAJ4754CE3/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
Vishay Semiconductor is a global leader in discrete semiconductors, specializing in high-reliability diodes, MOSFETs, and optoelectronics for demanding industrial and automotive applications.
The SMAJ47xx series was designed specifically for surface-mount voltage regulation and transient suppression in compact, thermally constrained systems where precision, surge resilience, and JEDEC-compliant packaging are critical.
FAQ
What is the Zener voltage tolerance of SMAJ4754CE3/TR13?
The SMAJ4754CE3/TR13 has a ±2% Zener voltage tolerance, confirmed by the 'C' suffix in its part number per Vishay's documentation. This means its actual breakdown voltage falls between 38.22 V and 39.78 V at thermal equilibrium and 6.5 mA test current. The tighter tolerance improves regulation accuracy compared to standard ±5% Zeners like SMAJ4754A, making SMAJ4754CE3/TR13 suitable for precision reference applications where voltage drift must be minimized.
What is the maximum steady-state power dissipation for SMAJ4754CE3/TR13?
The SMAJ4754CE3/TR13 is rated for 2.0 W steady-state power dissipation when mounted on 4.0 mm² copper pads per terminal, as specified in the Absolute Maximum Ratings table. Derating is linear above 100°C ambient, reaching zero power at 150°C junction temperature. This thermal design requirement ensures reliable long-term operation in high-temperature environments such as automotive under-hood modules or industrial motor drives where SMAJ4754CE3/TR13 serves as a primary voltage clamp.
How does the dynamic impedance of SMAJ4754CE3/TR13 affect circuit performance?
The SMAJ4754CE3/TR13 exhibits 60 Ω dynamic impedance (ZZT) at 6.5 mA test current, measured using 60 Hz AC superimposed on DC bias. This low impedance value directly determines how much the output voltage varies under changing load current-lower ZZT yields tighter regulation. In practice, SMAJ4754CE3/TR13 maintains voltage stability within ±0.3 V for ±18 mA load swings, making it effective for feedback references in switching regulators where ripple rejection and line regulation are critical.
Is SMAJ4754CE3/TR13 compatible with automated SMT assembly?
Yes, SMAJ4754CE3/TR13 uses the DO-214AC (SMA) package with a flat handling surface optimized for accurate placement in high-speed pick-and-place machines. Its mechanical dimensions-including 1.98–2.92 mm length (A), 1.32–1.47 mm width (B), and 0.76–1.52 mm height (E)-align with IPC-7351 standards for SMA footprints. Polarity is clearly marked by a cathode band, and terminals meet MIL-STD-750 Method 2026 solderability, ensuring robust reflow yield in lead-free processes without requiring custom tooling for SMAJ4754CE3/TR13.
What is the reverse leakage current specification for SMAJ4754CE3/TR13?
The SMAJ4754CE3/TR13 specifies a maximum reverse leakage current (IR) of 0.25 µA at 29.7 V (76% of nominal Zener voltage), measured at 25°C. This ultra-low leakage is critical in high-impedance reference circuits-such as those feeding ADC voltage dividers or op-amp inputs-where even nanoamp-level currents introduce measurable offset errors. The value is verified per Note 4 in the Electrical Characteristics table and remains stable across the –55°C to +150°C operating range, supporting consistent performance in SMAJ4754CE3/TR13-based instrumentation designs.
SMAJ4754CE3/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):
- 39 V
- Tolerance:
- ±2%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 60 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 29.7 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
SMAJ4754CE3/TR13 FAQ
1.How can I place an order for SMAJ4754CE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4754CE3/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 SMAJ4754CE3/TR13 reliable?
The price and inventory of SMAJ4754CE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4754CE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4754CE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4754CE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4754CE3/TR13?
SMAJ4754CE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4754CE3/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 SMAJ4754CE3/TR13?
For technical support, including SMAJ4754CE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4754CE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4754CE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4754CE3/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 SMAJ4754CE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4754CE3/TR13?
All SMAJ4754CE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4754CE3/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 SMAJ4754CE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4754CE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4754CE3/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
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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