Part Details for 1N749A by SPC Multicomp
Results Overview of 1N749A by SPC Multicomp
- Distributor Offerings: (3 listings)
- Number of FFF Equivalents: (5 replacements)
- CAD Models: (Request Part)
- Number of Functional Equivalents: (10 options)
- Part Data Attributes: (Available)
- Reference Designs: (Not Available)
Tip: Data for a part may vary between manufacturers. You can filter for manufacturers on the top of the page next to the part image and part number.
Applications
Consumer Electronics
Energy and Power Systems
Electronic Manufacturing
Renewable Energy
Automotive
1N749A Information
1N749A by SPC Multicomp is a Zener Diode.
Zener Diodes are under the broader part category of Diodes.
A diode is a electrical part that can control the direction in which the current flows in a device. Consider factors like voltage drop, current capacity, reverse voltage, and operating frequency when selecting a diode. Read more about Diodes on our Diodes part category page.
Price & Stock for 1N749A
| Part # | Distributor | Description | Stock | Price | Buy | |
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DISTI #
13T8941
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Newark | Zener Diode, 500Mw, 4.3V, Do-35, Zener Voltage Nom:4.3V, Power Dissipation:500Mw, Diode Case Style:Do-204Ah, No. Of Pins:2Pins, Operating Temperature Max:200°C, Diode Mounting:Through Hole, Product Range:1N7Xxx Series Rohs Compliant: Yes |Multicomp Pro 1N749A RoHS: Compliant Min Qty: 1 Package Multiple: 1 Date Code: 0 Container: Cut Tape | 17186 |
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$0.0050 | Buy Now |
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DISTI #
29061236
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Verical | Diode Zener Single 4.3V 5% 500mW 2-Pin DO-35 Min Qty: 10000 Package Multiple: 1 | Americas - 17186 |
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$0.0067 | Buy Now |
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Quest Components | ZENER DIODE, 4.3V V(Z), 5%, 0.4W, SILICON, UNIDIRECTIONAL, DO-35 | 400 |
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$2.4836 / $4.0275 | Buy Now |
Part Details for 1N749A
1N749A CAD Models
1N749A Part Data Attributes
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1N749A
SPC Multicomp
Buy Now
Datasheet
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Compare Parts:
1N749A
SPC Multicomp
Zener Diode, 4.3V V(Z), 5%, 0.5W, Silicon, Unidirectional, DO-35, GLASS PACAKGE-2
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| Part Life Cycle Code | Active | |
| Ihs Manufacturer | MULTICOMP PRO | |
| Package Description | GLASS PACAKGE-2 | |
| Reach Compliance Code | unknown | |
| ECCN Code | EAR99 | |
| HTS Code | 8541.10.00.50 | |
| Samacsys Manufacturer | Multicomp Pro | |
| Additional Feature | HIGH RELIABILITY | |
| Case Connection | ISOLATED | |
| Configuration | SINGLE | |
| Diode Element Material | SILICON | |
| Diode Type | ZENER DIODE | |
| JEDEC-95 Code | DO-35 | |
| JESD-30 Code | O-LALF-W2 | |
| Number of Elements | 1 | |
| Number of Terminals | 2 | |
| Operating Temperature-Max | 200 °C | |
| Package Body Material | GLASS | |
| Package Shape | ROUND | |
| Package Style | LONG FORM | |
| Polarity | UNIDIRECTIONAL | |
| Power Dissipation-Max | 0.5 W | |
| Reference Voltage-Nom | 4.3 V | |
| Surface Mount | NO | |
| Technology | ZENER | |
| Terminal Form | WIRE | |
| Terminal Position | AXIAL | |
| Voltage Tol-Max | 5% | |
| Working Test Current | 20 mA |
Alternate Parts for 1N749A
This table gives cross-reference parts and alternative options found for 1N749A. The Form Fit Function (FFF) tab will give you the options that are more likely to serve as direct pin-to-pin alternates or drop-in parts. The Functional Equivalents tab will give you options that are likely to match the same function of 1N749A, but it may not fit your design. Always verify details of parts you are evaluating, as these parts are offered as suggestions for what you are looking for and are not guaranteed.
| Part Number | Manufacturer | Composite Price | Description | Compare |
|---|---|---|---|---|
| TC1N749A.TB | Tak Cheong Electronics (Holdings) Co Ltd | Check for Price | Zener Diode, 4.3V V(Z), 5%, 0.5W, Silicon, Unidirectional, DO-35, HERMETIC SEALED, GLASS PACKAGE-2 | 1N749A vs TC1N749A.TB |
| 1N749A_S62Z | Fairchild Semiconductor Corporation | Check for Price | Zener Diode, 4.3V V(Z), 5%, 0.5W, Silicon, Unidirectional, DO-35, GLASS PACKAGE-2 | 1N749A vs 1N749A_S62Z |
| MZ5521B | Motorola Semiconductor Products | Check for Price | Zener Diode, 4.3V V(Z), 5%, 0.5W, Silicon, Unidirectional, DO-204AH | 1N749A vs MZ5521B |
| MZ5521BRL2 | Motorola Semiconductor Products | Check for Price | Zener Diode, 4.3V V(Z), 5%, 0.5W, Silicon, Unidirectional, DO-204AH | 1N749A vs MZ5521BRL2 |
| JANTX1N5521B | Motorola Mobility LLC | Check for Price | 4.3 V, 0.4 W, SILICON, UNIDIRECTIONAL VOLTAGE REGULATOR DIODE, DO-7 | 1N749A vs JANTX1N5521B |
1N749A Frequently Asked Questions (FAQ)
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The recommended operating temperature range for the 1N749A is -65°C to 175°C, although the datasheet only specifies the electrical characteristics at 25°C.
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To ensure proper derating, follow the manufacturer's guidelines for temperature derating, typically 1.25 mW/°C above 25°C. This means that for every degree above 25°C, the power rating of the diode decreases by 1.25 mW.
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The maximum surge current rating for the 1N749A is not explicitly stated in the datasheet, but it is typically limited to 10-20 times the maximum DC current rating for a short duration (e.g., 1-2 seconds). Consult the manufacturer for specific guidance.
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While the 1N749A can be used in switching power supply applications, it's essential to ensure that the diode can handle the high-frequency switching and the resulting voltage and current stresses. Consult the manufacturer's application notes and consider using a diode specifically designed for switching power supplies.
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To select the correct resistor value, consider the desired output voltage, the input voltage, and the current required by the load. Use the datasheet's voltage regulator circuit example and the formula provided to calculate the resistor value. Consult application notes or online resources for more detailed guidance.