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Microchip Technology SMAJ4753AE3/TR13
- Part No.:
- SMAJ4753AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4753AE3/TR13.pdf
- Description:
- DIODE ZENER 36V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,716
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Product details
Overview
SMAJ4753AE3/TR13 from Microsemi (now Microchip Technology) is a 2 W surface-mount silicon Zener diode with a nominal zener voltage of 36 V ±5%, 50 Ω dynamic impedance at 7 mA test current, and 125 mA maximum surge current. It serves as a precision voltage regulator or overvoltage clamp in DC power rails and transient protection circuits.
For engineers reviewing the SMAJ4753AE3/TR13 datasheet, SMAJ4753AE3/TR13 pinout, SMAJ4753AE3/TR13 application, or SMAJ4753AE3/TR13 equivalent, key selection criteria include zener tolerance (±5%), thermal resistance (25°C/W), DO-214AC package compatibility, and 100°C derated power handling.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable voltage across its terminals under varying load and temperature conditions. Its 36 V nominal zener voltage is specified at 7 mA test current (IZT) with 50 Ω dynamic impedance (ZZT), ensuring predictable regulation within ±5% tolerance.
Designed for surface-mount assembly on PCBs with 4.0 mm² copper pads per terminal, it supports steady-state dissipation of 2.0 W at 25°C, derating linearly to zero at 150°C junction temperature. Polarity is marked by a cathode band, and soldering must not exceed 260°C for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% at IZT = 7 mA - defines regulated output voltage under nominal bias |
| Power Dissipation (PAV) | 2.0 W at 25°C on 4.0 mm² pads - sets maximum continuous DC power handling |
| Dynamic Impedance (ZZT) | 50 Ω at IZT = 7 mA - indicates voltage stability under small-signal AC variation |
| Surge Current (IS) | 125 mA (½-sine, 1/120 s) - defines single-pulse transient energy absorption capability |
| Junction Temperature Range | –55°C to +150°C - specifies operational and storage limits for industrial environments |
| Thermal Resistance (RθJL) | 25°C/W - determines temperature rise above pad temperature per watt dissipated |
Pinout & Package
Package: DO-214AC (SMAJ), surface-mount, cathode-indicated by band. Dimensions conform to JEDEC standard with modified 'A' dimension (1.98–2.92 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-voltage reference node | Connected to lower-potential side in Zener regulation; carries forward current up to 200 mA |
| Cathode | Reverse breakdown terminal / regulated output node | Connected to higher-potential side; maintains ~36 V relative to anode during breakdown |
Key Features
| Feature | Design Value |
|---|---|
| Surface-mount flat handling surface | Enables accurate automated placement and reflow alignment on PCBs |
| JEDEC DO-214AC mechanical compatibility | Ensures fit and footprint interoperability with standard SMA packages |
| Electrically equivalent to 1N4753A | Supports legacy design migration without circuit redesign |
| UL94V-0 flame-retardant epoxy housing | Meets safety requirements for enclosed industrial and consumer end equipment |
Applications
| Industrial Power Supply Regulation | Automotive ECU Voltage Reference |
|---|---|
Use Scenario: Stabilizing 36 V auxiliary rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for op-amp feedback networks and supervisor IC inputs. Use Value: Maintains ±5% regulation over –40°C to +85°C ambient, enabling reliable analog sensing and brown-out detection. | Use Scenario: Providing stable 36 V reference for CAN transceiver biasing and microcontroller reset circuitry in engine control units. IC Role / Device Role / Timing Role: Precision voltage clamp protecting downstream logic from battery overvoltage transients (e.g., load dump). Use Value: Withstands 125 mA surge pulses per ISO 7637-2 Pulse 5a, meeting automotive EMC robustness requirements. |
| Telecom Line Card Protection | Medical Imaging Power Conditioning |
Use Scenario: Clamping induced surges on 48 V DC distribution lines in telecom base station line cards. IC Role / Device Role / Timing Role: Transient voltage suppressor placed across primary DC input to limit voltage excursions during lightning-induced coupling. Use Value: 2 W steady-state rating and 125 mA surge capacity enable repeated clamping without thermal runaway. | Use Scenario: Regulating high-voltage bias supply for photodiode arrays in portable X-ray detectors. IC Role / Device Role / Timing Role: Low-noise shunt reference stabilizing 36 V analog front-end supply, minimizing signal offset drift. Use Value: 50 Ω dynamic impedance ensures <1 mV ripple under 1–10 mA load variation, critical for sub-percent ADC accuracy. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4753A | Through-hole DO-41 package; identical electrical specs (36 V ±5%, 2 W, 50 Ω ZZT) | Requires PCB through-hole layout; unsuitable for high-density SMT assemblies | Select when legacy through-hole manufacturing or manual prototyping is used |
| BZX84-C36 | SOT-23 package; 36 V ±5%, 300 mW PAV, 90 Ω ZZT - lower power and higher impedance | Limited to low-current references (<20 mA); cannot replace SMAJ4753AE3/TR13 in 2 W clamping roles | Select only for space-constrained, low-power biasing where 300 mW suffices |
Compared with 1N4753A and BZX84-C36, SMAJ4753AE3/TR13 uniquely delivers 2 W SMT-compatible Zener regulation in DO-214AC, bridging the gap between through-hole robustness and modern board density requirements.
Availability
SMAJ4753AE3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECUs, telecom line cards, and medical imaging systems requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for SMAJ4753AE3/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
Microsemi (acquired by Microchip Technology in 2018) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components.
The SMAJ47xxA series belongs to Microsemi's legacy Zener diode product line, engineered for precision voltage regulation and transient suppression in harsh-environment industrial and transportation systems.
FAQ
What is the zener voltage tolerance of SMAJ4753AE3/TR13?
SMAJ4753AE3/TR13 has a nominal zener voltage of 36 V with a ±5% tolerance, as indicated by the absence of a tolerance suffix ('C' = ±2%, 'D' = ±1%). This tolerance applies at thermal equilibrium after 90 seconds of DC current application, per datasheet note 4.
Does SMAJ4753AE3/TR13 support automated optical inspection (AOI) after reflow?
Yes, SMAJ4753AE3/TR13 features a flat handling surface and cathode band marking compatible with standard AOI systems. Its DO-214AC package geometry and consistent band contrast enable reliable post-reflow defect detection for solder joint integrity and polarity verification.
What is the maximum allowable soldering temperature for SMAJ4753AE3/TR13?
The maximum soldering temperature for SMAJ4753AE3/TR13 is 260°C for no more than 10 seconds, per MIL-STD-750 Method 2026. Exceeding this limit risks epoxy degradation, bond wire damage, or parametric shift in zener voltage and dynamic impedance.
How does the thermal resistance of SMAJ4753AE3/TR13 affect its power derating?
With a thermal resistance RθJL of 25°C/W, SMAJ4753AE3/TR13 rises 25°C above pad temperature per watt dissipated. Its 2.0 W rating at 25°C derates linearly to zero at 150°C junction temperature, requiring ≥100°C pad temperature margin for full-power operation in 50°C ambient designs.
Is SMAJ4753AE3/TR13 electrically equivalent to any industry-standard part?
Yes, SMAJ4753AE3/TR13 is electrically equivalent to the JEDEC-registered 1N4753A Zener diode, matching its 36 V ±5% zener voltage, 2 W power rating, and 50 Ω dynamic impedance at 7 mA. The primary difference is package type: DO-214AC (SMAJ) vs. DO-41.
SMAJ4753AE3/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):
- 36 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 50 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 27.4 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
SMAJ4753AE3/TR13 FAQ
1.How can I place an order for SMAJ4753AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4753AE3/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 SMAJ4753AE3/TR13 reliable?
The price and inventory of SMAJ4753AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4753AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4753AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4753AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ4753AE3/TR13?
SMAJ4753AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4753AE3/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 SMAJ4753AE3/TR13?
For technical support, including SMAJ4753AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4753AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4753AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4753AE3/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 SMAJ4753AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4753AE3/TR13?
All SMAJ4753AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4753AE3/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 SMAJ4753AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4753AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4753AE3/TR13 Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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