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Microchip Technology SMAJ4753E3/TR13
- Part No.:
- SMAJ4753E3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4753E3/TR13.pdf
- Description:
- DIODE ZENER 36V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:2,264
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Product details
Overview
SMAJ4753E3/TR13 from Microsemi (now Microchip Technology) is a 36 V, 5% tolerance, 2 W surface-mount Zener diode in DO-214AC (SMA) package, rated for 125 mA maximum regulator current at 100°C and 125 mA surge current, used for voltage regulation and overvoltage protection in power supply rails and I/O interface circuits.
For engineers reviewing the SMAJ4753E3/TR13 datasheet, SMAJ4753E3/TR13 pinout, SMAJ4753E3/TR13 application, or SMAJ4753E3/TR13 equivalent, key selection criteria include zener voltage tolerance (±5%), thermal resistance (25°C/W), cathode-band polarity marking, JEDEC DO-214AC mechanical compatibility, and 2 W steady-state power dissipation under defined PCB pad conditions.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable reference voltage across its terminals under varying load and temperature conditions. It exhibits a sharp knee impedance of 50 Ω at 0.25 mA test current and dynamic impedance of 50 Ω at 7.0 mA nominal zener current, with specified reverse leakage ≤5 µA at 27.4 V.
Designed for surface-mount assembly with flame-retardant UL94V-0 epoxy housing, it supports soldering at 260°C for 10 seconds and features cathode band polarity indication per MIL-STD-750 Method 2026 terminal solderability requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 36 V ±5% - precise regulation point at 7.0 mA test current, verified at thermal equilibrium |
| Power Dissipation (PAV) | 2.0 W - achievable only when mounted on 4.0 mm² copper pads per terminal, derated linearly above 100°C |
| Max Regulator Current (IZM) | 50 mA at TL = 100°C - maximum continuous DC current before thermal runaway |
| Dynamic Impedance (ZZT) | 50 Ω @ 7.0 mA - low AC impedance ensures minimal output voltage variation under dynamic load changes |
| Reverse Leakage (IR) | ≤5 µA @ 27.4 V - guarantees low standby power loss in high-impedance bias networks |
| Surge Current (IS) | 125 mA - peak non-repetitive current capability for transient overvoltage clamping |
| Thermal Resistance (RθJL) | 25°C/W - junction-to-lead thermal path enables predictable temperature rise under 2 W operation |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, flat handling surface for accurate placement; cathode indicated by molded band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node in reverse-biased Zener configuration; carries full regulator/surge current |
| Cathode | Reverse breakdown terminal | Marked with band; connected to higher-potential node; defines regulated output voltage referenced to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC DO-214AC mechanical compliance | Enables drop-in replacement for legacy 1N47xx series in existing SMA footprints despite slightly larger 'A' dimension (max 2.92 mm vs standard 2.66 mm) |
| 2 W steady-state power rating | Supports robust voltage clamping in 5–24 V rail protection without external heat sinking under defined PCB layout |
| Sharp knee impedance (50 Ω @ 0.25 mA) | Ensures stable turn-on behavior and low noise in precision reference and feedback loop applications |
| UL94V-0 flame-retardant epoxy | Meets safety requirements for industrial and consumer end-equipment mounting directly on PCBs |
Applications
| Industrial Power Supply Regulation | Automotive ECU I/O Protection |
|---|---|
Use Scenario: Stabilizing +36 V auxiliary rail in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to clamp and regulate voltage against line transients and load variations. Use Value: Maintains 36 V ±1.8 V tolerance across -40°C to +85°C ambient, enabling reliable ADC reference and optocoupler biasing. | Use Scenario: Protecting CAN transceiver VCC input from load-dump spikes up to 40 V in 12 V automotive systems. IC Role / Device Role / Timing Role: Transient voltage suppressor placed between VCC and ground, conducting surge current during ISO 7637-2 pulse 5a events. Use Value: Limits clamped voltage to ≤36.5 V with 125 mA surge rating, preventing latch-up in 36 V-tolerant CAN PHY ICs. |
| Telecom Line Card Biasing | Medical Sensor Signal Conditioning |
Use Scenario: Providing stable 36 V bias for RF power amplifier stages in LTE base station remote radio units. IC Role / Device Role / Timing Role: Precision voltage reference source for drain bias control in GaN FET driver circuits. Use Value: Delivers <1% voltage drift over 1000-hour life at 70°C, supporting long-term RF output stability. | Use Scenario: Setting reference voltage for isolated analog front-end (AFE) in portable ultrasound probe signal chain. IC Role / Device Role / Timing Role: Low-noise Zener element in dual-supply op-amp bias network requiring tight regulation and low leakage. Use Value: ≤5 µA reverse leakage at 27.4 V minimizes offset error in high-impedance sensor interfaces. |
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 36 V ±5%, 1 W rating; no UL94V-0 epoxy | Requires through-hole assembly; unsuitable for high-density SMT layouts or automated reflow | Select when legacy board repair or prototyping with breadboard-compatible leads is required |
| MMSZ4708T1G | SOD-123 package; 36 V ±5%, 500 mW rating; ZZT = 100 Ω @ 5 mA; RθJL = 300°C/W | Limited to low-power biasing due to 0.5 W rating; higher impedance reduces regulation accuracy | Select only for space-constrained, low-current (<10 mA) reference applications where thermal margin is not critical |
Compared with SMAJ4753E3/TR13, 1N4753A offers identical electrical specs but requires manual or wave-solder assembly, while MMSZ4708T1G sacrifices power handling and regulation precision for ultra-small footprint-neither is pin-compatible, and both demand layout revision.
Availability
SMAJ4753E3/TR13 is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU protection, telecom line card biasing, and medical sensor conditioning requiring stable component supply with full traceability and lifecycle management.
Supply support for SMAJ4753E3/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 Corporation (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 SMAJ47xx series belongs to Microsemi's silicon Zener diode product line, engineered for robust voltage regulation and transient suppression in harsh-environment industrial, aerospace, and automotive applications.
FAQ
What is the zener voltage tolerance for SMAJ4753E3/TR13?
The SMAJ4753E3/TR13 has a nominal zener voltage of 36 V with a ±5% tolerance, as confirmed in the Electrical Characteristics table. This tolerance applies at thermal equilibrium (90 seconds after dc current application) and is verified at 7.0 mA test current. The 'E3' suffix denotes this 5% grade; no suffix indicates 10%, 'C' is 2%, and 'D' is 1%.
Can SMAJ4753E3/TR13 be used in place of 1N4753A?
Yes, SMAJ4753E3/TR13 is electrically equivalent to 1N4753A per the datasheet note stating "Electrically Equivalent to JEDEC Registered 1N4728A thru 1N4764A." However, SMAJ4753E3/TR13 uses a DO-214AC (SMA) surface-mount package versus DO-41 through-hole, so PCB layout and assembly process must be adapted accordingly.
What is the maximum steady-state power dissipation for SMAJ4753E3/TR13?
The SMAJ4753E3/TR13 is rated for 2.0 W steady-state power dissipation when mounted on 4.0 mm² copper pads per terminal. Power must be derated linearly above 100°C lead temperature, reaching zero at 150°C. This rating assumes proper thermal management per Note 2 and Note 3 in the Maximum Ratings table.
How is polarity identified on SMAJ4753E3/TR13?
Polarity on SMAJ4753E3/TR13 is indicated by a molded cathode band on the body of the DO-214AC package. The banded end is the cathode terminal, which connects to the higher-potential node in reverse-biased Zener operation. This marking complies with JEDEC standards and is visible under standard optical inspection.
What is the surge current rating for SMAJ4753E3/TR13?
The SMAJ4753E3/TR13 has a maximum surge current (IS) rating of 125 mA, measured using a ½ sine wave pulse of 1/120 second duration at 25°C ambient. This rating applies to non-repetitive transient events such as ESD or load dump, and is distinct from the 50 mA maximum regulator current (IZM) at 100°C.
SMAJ4753E3/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:
- ±10%
- 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
SMAJ4753E3/TR13 FAQ
1.How can I place an order for SMAJ4753E3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4753E3/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 SMAJ4753E3/TR13 reliable?
The price and inventory of SMAJ4753E3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4753E3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4753E3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4753E3/TR13 transactions.
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4.How is shipping managed for SMAJ4753E3/TR13?
SMAJ4753E3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4753E3/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 SMAJ4753E3/TR13?
For technical support, including SMAJ4753E3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4753E3/TR13 requirements.
6.How does Aetrix verify that SMAJ4753E3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4753E3/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 SMAJ4753E3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4753E3/TR13?
All SMAJ4753E3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4753E3/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 SMAJ4753E3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4753E3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4753E3/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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