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Microchip Technology 1N4756CP/TR8
- Part No.:
- 1N4756CP/TR8
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756CP/TR8.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,935
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Product details
Overview
1N4756CP/TR8 from Microsemi is a 1.0 W, 47 V ±5% axial-lead silicon Zener diode in DO-41 plastic package, rated for 5.5 mA test current, 80 Ω dynamic impedance at IZT, and 19 Ω knee impedance at 0.25 mA, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4756CP/TR8 datasheet, 1N4756CP/TR8 pinout, 1N4756CP/TR8 application, or 1N4756CP/TR8 equivalent, key selection factors include its 47 V nominal Zener voltage, 1.0 W steady-state power rating at TL < 105 °C, ±5% tolerance (A suffix), RoHS-compliant "e3" plating, and tape-and-reel packaging (TR8 suffix) for automated assembly.
Technical Context
This device operates in reverse breakdown to maintain stable DC voltage across its terminals under varying load and line conditions. It delivers regulated output with 80 Ω dynamic impedance at 5.5 mA and 19 Ω knee impedance at 0.25 mA, supporting low-noise reference generation in analog circuitry.
Designed for operation from –65 °C to +150 °C, it exhibits 45 °C/W junction-to-lead thermal resistance at 10 mm lead length and requires cathode-band orientation for correct Zener biasing-banded end positive relative to anode during regulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 47 V ±5% at 5.5 mA - defines precise regulation point for feedback loops and voltage references |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load on PCB leads |
| Dynamic Impedance (ZZT) | 80 Ω @ 5.5 mA - determines AC ripple rejection and regulation stability under load variation |
| Knee Impedance (ZZK) | 19 Ω @ 0.25 mA - enables usable regulation even at very low bias currents |
| Reverse Leakage (IR) | <5 μA @ 35.8 V - ensures minimal quiescent current in standby or high-impedance sensing nodes |
| Forward Voltage | ≤1.2 V @ 200 mA - supports use as clamp or protection diode in forward conduction mode |
| Thermal Resistance | 45 °C/W junction-to-lead - informs heatsinking requirements when mounted with 10 mm lead length |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead package with cathode identified by colored band; no active pins-two-terminal device with polarity-critical mounting.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reference ground node | Connected to system ground or lower-potential rail; reverse-biased during regulation |
| Cathode (banded end) | Regulated output node | Connected to voltage source input; maintains 47 V above anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4756A series | Ensures industry-standard interchangeability and qualification traceability per MIL-PRF-19500 |
| Plastic encapsulation (P suffix) | Reduces thermal resistance vs. glass-body variants, improving power handling in compact layouts |
| RoHS-compliant "e3" termination | Meets global environmental compliance without sacrificing solderability or reliability |
| Tape-and-reel packaging (TR8) | Enables direct feeding into SMT pick-and-place systems for high-volume production |
| Moisture sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for assembly logistics |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or discrete transistor-based regulators. IC Role / Device Role / Timing Role: Zener reference element providing fixed 47 V reference to error amplifier input. Use Value: Maintains ±5% output accuracy across temperature and load, leveraging 80 Ω ZZT for low ripple coupling. | Use Scenario: Protecting downstream circuitry from transient overvoltage events on 48 V DC rails. IC Role / Device Role / Timing Role: Shunt clamping device diverting surge current above 47 V threshold. Use Value: Limits peak voltage to ≤47.5 V with 1500 mA surge rating, preventing damage to 50 V-rated components. |
| Signal Level Translation | Current Source Bias |
Use Scenario: Generating stable bias points for op-amp input stages operating from unregulated supplies. IC Role / Device Role / Timing Role: Passive voltage node stabilizer enabling predictable common-mode range. Use Value: Provides 47 V reference with 19 Ω ZZK down to 0.25 mA, ensuring regulation even in ultra-low-power sensor interfaces. | Use Scenario: Setting constant current in LED driver or photodiode transimpedance amplifier circuits. IC Role / Device Role / Timing Role: Voltage reference defining emitter/base bias for current mirror or cascode configuration. Use Value: Delivers stable 47 V reference with ≤1.2 V forward drop, enabling accurate current-setting resistors without thermal drift penalty. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4756A | No TR8 tape-and-reel; bulk or ammo pack only; same electrical specs and DO-41 package | Not suitable for automated SMT placement without repackaging | Select 1N4756CP/TR8 when requiring factory-loaded reels for pick-and-place compatibility |
| BZX55-C47 | 47 V ±5%, 500 mW rating, DO-35 glass package, higher ZZT (100 Ω), lower IZM (130 mA) | Lower power handling limits use in >500 mW regulation or surge scenarios | Choose BZX55-C47 only for space-constrained through-hole designs where 1 W dissipation is not required |
Compared with 1N4756A and BZX55-C47, the 1N4756CP/TR8 offers full 1 W power capability in RoHS-compliant plastic packaging with factory tape-and-reel delivery-making it optimal for industrial power supplies needing robust, automatable voltage references.
Availability
1N4756CP/TR8 is available at Aetrix Electronics and suitable for industrial power supplies, telecom DC-DC converters, and test equipment requiring stable component supply with consistent Zener voltage and thermal performance.
Supply support for 1N4756CP/TR8 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 (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, RF, and timing solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was developed to deliver JEDEC-standardized, high-stability Zener regulation in plastic packages optimized for cost-sensitive yet thermally demanding power management applications.
FAQ
What is the Zener voltage tolerance of the 1N4756CP/TR8?
The 1N4756CP/TR8 has a nominal Zener voltage of 47 V with ±5% tolerance, indicated by the "A" suffix in the part number per JEDEC standard. This tolerance applies at 5.5 mA test current and 25 °C lead temperature. The 1N4756CP/TR8 does not offer tighter tolerances like ±1% or ±2%-those require suffixes "D" or "C", respectively, which are not present in this variant.
Is the 1N4756CP/TR8 RoHS compliant?
Yes, the 1N4756CP/TR8 is RoHS compliant, confirmed by the "e3" suffix in its full designation. This indicates annealed matte-tin plating per MIL-STD-750 Method 2026 and compliance with EU Directive 2011/65/EU. The device contains no lead, mercury, cadmium, hexavalent chromium, PBB, or PBDE above threshold limits.
What does the "TR8" suffix mean in 1N4756CP/TR8?
The "TR8" suffix denotes EIA-296 standard tape-and-reel packaging with 8 mm carrier tape width, designed for surface-mount technology (SMT) pick-and-place machines. It contains 1,000 units per reel and enables automated assembly without manual handling or repackaging-distinct from bulk or ammo-pack versions like 1N4756A or 1N4756AP.
Can the 1N4756CP/TR8 be used in place of a 1N4756A?
Yes, the 1N4756CP/TR8 is electrically and mechanically identical to the 1N4756A except for packaging and plating: both share 47 V ±5%, 1.0 W rating, DO-41 package, and same Zener characteristics. The "CP" adds RoHS-compliant plating, and "TR8" adds tape-and-reel-so 1N4756CP/TR8 replaces 1N4756A in automated lines but requires no circuit redesign.
What is the maximum surge current rating for the 1N4756CP/TR8?
The 1N4756CP/TR8 has a maximum non-repetitive reverse surge current (ISM) of 1500 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating supports transient overvoltage suppression in 48 V systems, provided average power dissipation remains within 1.0 W derating limits per Figure 1 of the Microsemi datasheet.
1N4756CP/TR8 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 47 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 80 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 35.8 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4756CP/TR8 FAQ
1.How can I place an order for 1N4756CP/TR8 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756CP/TR8 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 1N4756CP/TR8 reliable?
The price and inventory of 1N4756CP/TR8 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756CP/TR8 is usually 5 days.
3.What payment methods are accepted for 1N4756CP/TR8?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756CP/TR8 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4756CP/TR8?
1N4756CP/TR8 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756CP/TR8 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 1N4756CP/TR8?
For technical support, including 1N4756CP/TR8 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756CP/TR8 requirements.
6.How does Aetrix verify that 1N4756CP/TR8 is sourced from the original manufacturer or authorized distributors?
All 1N4756CP/TR8 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 1N4756CP/TR8 meets industry standards.
7.What is the process for return or replacement of 1N4756CP/TR8?
All 1N4756CP/TR8 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756CP/TR8, 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 1N4756CP/TR8 part is unused and in its original packaging.
Return procedure for 1N4756CP/TR8:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756CP/TR8 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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Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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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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