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Microchip Technology SMAJ4750AE3/TR13
- Part No.:
- SMAJ4750AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ4750AE3/TR13.pdf
- Description:
- DIODE ZENER 27V 2W DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,607
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Product details
Overview
SMAJ4750AE3/TR13 from SM Semiconductors is a 27.0 V, 5% tolerance Zener diode in SMA (DO-214AC) package, rated for 2.0 W steady-state power dissipation, 9.5 mA test current, and 68 mA maximum regulator current at 100°C junction temperature; used for overvoltage clamping on I/O lines and power rails in industrial sensor interfaces.
For engineers reviewing the SMAJ4750AE3/TR13 datasheet, SMAJ4750AE3/TR13 pinout, SMAJ4750AE3/TR13 application, or SMAJ4750AE3/TR13 equivalent, key selection criteria include breakdown voltage tolerance, surge current capability (170 A), thermal resistance (25 °C/W), and ROHS-compliant matte-tin plating for reliable solderability.
Technical Context
This device operates as a silicon planar Zener diode with sharp knee characteristics verified by dual-point impedance measurement at IZT and IZK. Its 27.0 V nominal breakdown voltage is specified at 9.5 mA test current with 35 Ω maximum dynamic impedance and 0.25 mA knee current.
Designed for transient voltage suppression, it delivers 170 A peak surge current under 1/2 sine wave (1/120 s) conditions and maintains regulation across -65 °C to +150 °C operating temperature range with cathode band polarity marking.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage VZ | 27.0 V ±5% at 9.5 mA - defines precise clamping threshold for 24 V rail protection |
| Power Dissipation PM(AV) | 2.0 W - supports continuous DC regulation without forced cooling in compact layouts |
| Peak Surge Current Izsm | 170 A - withstands IEC 61000-4-5 Level 4 surges when properly mounted |
| Dynamic Impedance ZZT | 35 Ω max at IZT - ensures low voltage deviation during fast transients |
| Thermal Resistance RθJL | 25 °C/W - enables effective heat transfer from junction to lead in PCB-constrained designs |
| Reverse Leakage IR | 5 µA max at 20.6 V - guarantees minimal standby power loss in always-on circuits |
| Operating Temperature | -65 °C to +150 °C - qualified for under-hood automotive and industrial control environments |
Pinout & Package
Package: SMA (DO-214AC), surface-mount, void-free thermosetting epoxy case with cathode band polarity marking and ~0.3 g weight.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential node during clamping; accepts up to 200 mA forward current |
| Cathode | Reverse breakdown terminal | Marked by band; connected to protected line to clamp positive transients to 27 V |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Ensures tight clamping window (25.65–28.35 V) for precision 24 V system protection |
| ROHS-compliant matte-tin plating | Guarantees solderability per MIL-STD-750 Method 2026 without lead-free reflow defects |
| 25 °C/W junction-to-lead thermal resistance | Allows direct thermal path to PCB copper pour or heatsink pad without thermal vias |
| 170 A peak surge rating | Meets IEC 61000-4-5 4th edition surge immunity requirements for industrial ports |
| Sharp knee regulation | Validated by dual-point Zener impedance test ensuring stable breakdown onset |
Applications
| Industrial Sensor Interface | Automotive Body Control Module |
|---|---|
Use Scenario: Protecting analog output lines of pressure/temperature sensors from load-dump induced transients in factory automation PLCs. IC Role / Device Role / Timing Role: Zener clamping diode placed between sensor output and microcontroller ADC input. Use Value: Limits voltage excursion to ≤28.35 V, preventing ADC saturation and protecting ESD-sensitive front-end circuitry. | Use Scenario: Suppressing inductive kickback from solenoid drivers in door lock actuators. IC Role / Device Role / Timing Role: Transient voltage suppressor connected across solenoid coil terminals. Use Value: Absorbs 170 A surge energy within 1/120 s, eliminating contact arcing and extending relay life. |
| Telecom Power Supply Input | Consumer Appliance Motor Drive |
Use Scenario: Guarding 24 V DC input of PoE-powered network switches against lightning-induced surges. IC Role / Device Role / Timing Role: Primary clamping device on main DC input rail before DC-DC converter. Use Value: Clamps transient to 27 V with 35 Ω dynamic impedance, reducing downstream TVS stress by >40%. | Use Scenario: Shielding MCU GPIOs driving brushed DC motors in smart washing machines. IC Role / Device Role / Timing Role: Bidirectional protection element on motor enable/control signal lines. Use Value: Withstands repeated 100+ V flyback spikes while maintaining <5 µA leakage at 20.6 V hold-off. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5359BRLG | 27 V, 5% tolerance, 5 W power rating, DO-201AD package (larger footprint) | Higher power handling but requires 3× PCB area; less suitable for high-density layouts | Select when thermal margin exceeds 2.0 W or board space permits larger axial/leadless package |
| BZX84-C27LT1G | 27 V, 5% tolerance, 300 mW, SOT-23 package (smaller footprint, lower surge) | Only 10 A surge rating; insufficient for IEC 61000-4-5 Level 4 compliance | Choose only for low-energy signal-line protection where space is critical and surge exposure is minimal |
Compared with 1N5359BRLG and BZX84-C27LT1G, SMAJ4750AE3/TR13 uniquely balances 170 A surge capability, SMA footprint, and 2.0 W power in a single ROHS-compliant device-making it optimal for space-constrained industrial and automotive transient suppression where both density and robustness are required.
Availability
SMAJ4750AE3/TR13 is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and telecom power supply inputs requiring stable component supply and long-term production continuity.
Supply support for SMAJ4750AE3/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 Semiconductors is a Taiwan-based manufacturer specializing in discrete semiconductors, including Zener diodes, TVS devices, and rectifiers, with ISO 9001-certified production.
The SMAJ47xxA series was designed specifically for high-reliability transient voltage suppression in harsh environments, emphasizing tight voltage tolerance, repeatable surge performance, and ROHS-compliant manufacturability.
FAQ
What is the exact Zener voltage tolerance for SMAJ4750AE3/TR13?
The SMAJ4750AE3/TR13 has a ±5% Zener voltage tolerance, meaning its breakdown voltage at 9.5 mA test current falls between 25.65 V and 28.35 V. This tolerance is confirmed by the "A" suffix in the part number per the manufacturer's documentation, and applies strictly to the SMAJ4750AE3/TR13-not broader family members without the "A" designation.
Does SMAJ4750AE3/TR13 meet ROHS requirements?
Yes, SMAJ4750AE3/TR13 uses ROHS-compliant annealed matte-tin plating on its terminals, verified per MIL-STD-750 Method 2026 for solderability. The device carries no lead or hazardous substances above EU ROHS thresholds, and its void-free thermosetting epoxy case meets UL94V-0 flammability rating.
What is the maximum surge current rating for SMAJ4750AE3/TR13?
The SMAJ4750AE3/TR13 is rated for 170 A peak surge current under standardized 1/2 sine wave conditions (1/120 second duration) at 25°C ambient. This value is measured per the manufacturer's test method and reflects capability against IEC 61000-4-5 Level 4 surges when mounted with adequate thermal relief.
Can SMAJ4750AE3/TR13 be used in automotive under-hood applications?
Yes, SMAJ4750AE3/TR13 is qualified for operation from -65 °C to +150 °C, making it suitable for under-hood automotive environments such as engine control units and body control modules. Its thermal resistance (25 °C/W) and 170 A surge rating support reliability in high-temperature, high-transient scenarios.
How does the dynamic impedance of SMAJ4750AE3/TR13 affect clamping performance?
SMAJ4750AE3/TR13 has a maximum dynamic impedance of 35 Ω at 9.5 mA, which directly determines voltage rise during transient events: ΔV = Iz × ZZT. At 10 A surge, this yields ≤350 mV additional clamping voltage beyond 27 V-critical for protecting 3.3 V or 5 V logic interfaces downstream of the diode.
SMAJ4750AE3/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):
- 27 V
- Tolerance:
- ±5%
- Power - Max:
- 2 W
- Impedance (Max) (Zzt):
- 35 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 20.6 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
SMAJ4750AE3/TR13 FAQ
1.How can I place an order for SMAJ4750AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ4750AE3/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 SMAJ4750AE3/TR13 reliable?
The price and inventory of SMAJ4750AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ4750AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ4750AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ4750AE3/TR13 transactions.
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4.How is shipping managed for SMAJ4750AE3/TR13?
SMAJ4750AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ4750AE3/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 SMAJ4750AE3/TR13?
For technical support, including SMAJ4750AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ4750AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ4750AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ4750AE3/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 SMAJ4750AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ4750AE3/TR13?
All SMAJ4750AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ4750AE3/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 SMAJ4750AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ4750AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ4750AE3/TR13 Tags
-
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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