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Microchip Technology 1N4747CP/TR12
- Part No.:
- 1N4747CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4747CP/TR12.pdf
- Description:
- DIODE ZENER 20V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,267
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Product details
Overview
1N4747CP/TR12 from Microsemi is a 20 V, 1 W plastic-encapsulated Zener diode with ±5% voltage tolerance (A-suffix), DO-41 package, 12.5 mA test current, and 22 Ω dynamic impedance at IZT. It provides stable voltage regulation in power supply reference, overvoltage protection, and biasing circuits across industrial temperature range.
For engineers reviewing the 1N4747CP/TR12 datasheet, 1N4747CP/TR12 pinout, 1N4747CP/TR12 application, or 1N4747CP/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (225 mA), RoHS-compliant "e3" plating, and tape-and-reel packaging per EIA-296.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain a stable 20 V reference across a wide current range (0.25–225 mA). Its DO-41 axial-leaded plastic package delivers lower thermal resistance than glass-body variants and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
Designed for DC voltage regulation, it features a sharp knee impedance profile (ZZK = 22 Ω @ IZK = 0.25 mA), forward voltage ≤1.2 V @ 200 mA, and operates from –65 °C to +150 °C. Polarity is marked by cathode band; regulation requires cathode-positive bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 20 V ±5% at 12.5 mA - defines precise regulation point for reference and clamp circuits |
| Power Dissipation | 1.0 W at TL < 105 °C - sets maximum continuous thermal load on lead-mounted layout |
| Dynamic Impedance | 22 Ω @ IZT = 12.5 mA - determines output voltage stability under varying load current |
| Max Reverse Current | 5 μA @ VR = 15.2 V - ensures low leakage below regulation threshold |
| Surge Current (ISM) | 225 mA (½-sine, 1/120 s) - supports transient overvoltage clamping capability |
| Thermal Resistance | 45 °C/W junction-to-lead (3/8″ lead length) - enables thermal design with standard PCB mounting |
| Operating Temp | –65 °C to +150 °C - validated for extended industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by colored band; leads are tin-lead or RoHS-compliant matte-tin plated, solderable per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Reverse-biased input terminal | Connected to lower-potential node during Zener operation; carries full regulator current |
| Cathode | Regulated output terminal | Banded end; held at stable 20 V above anode when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Industry-standard footprint and electrical behavior enabling drop-in replacement across multiple suppliers |
| Plastic encapsulation (P suffix) | 45 °C/W junction-to-lead thermal resistance - 38% lower than equivalent glass-body (G-suffix) devices |
| RoHS-compliant "e3" plating | Matte-tin termination compatible with lead-free reflow and wave soldering per JEDEC J-STD-020B |
| Tape-and-reel packaging (TR12 suffix) | EIA-296 compliant 12 mm tape width - supports automated SMT placement despite axial-leaded form factor |
| MIL-STD-750 ESD robustness | Non-sensitive per Method 1020 - eliminates need for ESD handling controls in assembly |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifiers. IC Role / Device Role / Timing Role: Precision DC voltage reference source establishing regulated output setpoint. Use Value: Maintains ±5% output accuracy over –65 °C to +150 °C and 0.25–225 mA operating range. | Use Scenario: Clamping transient spikes on 24 V industrial control bus lines. IC Role / Device Role / Timing Role: Shunt overvoltage limiter diverting surge energy to ground before downstream IC damage. Use Value: Withstands 225 mA surge (½-sine, 1/120 s) while holding clamped voltage ≤20.6 V. |
| Bias Network Stabilization | Temperature-Compensated Reference |
Use Scenario: Providing stable bias current to op-amp input stages in sensor signal conditioning circuits. IC Role / Device Role / Timing Role: Low-noise, low-drift DC current source via constant-voltage drop across series resistor. Use Value: Dynamic impedance of 22 Ω minimizes AC ripple coupling into bias node. | Use Scenario: Paired with complementary tempco diodes in precision analog front-ends. IC Role / Device Role / Timing Role: Primary reference element whose 20 V nominal value anchors compensation network. Use Value: Temperature coefficient near zero crossing (~0 mV/°C) at 20 V enables minimal drift in composite references. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4747A | No "P" (plastic) or "TR12" suffix; bulk-packaged, non-RoHS default plating | Lacks tape-and-reel automation support and RoHS compliance; same electrical specs | Select when manual assembly or legacy Pb-based soldering is used |
| MMBZ5248BS | SOT-23 surface-mount, 20 V ±5%, 225 mW max power, 30 Ω ZZT | Lower power rating and higher dynamic impedance limit use to low-current biasing only | Select for space-constrained PCBs where 1 W dissipation is not required |
Compared with 1N4747A and MMBZ5248BS, the 1N4747CP/TR12 uniquely combines 1 W power handling, DO-41 mechanical robustness, RoHS-compliant plating, and EIA-296 tape-and-reel - making it optimal for high-reliability industrial power rail regulation requiring automated assembly and thermal margin.
Availability
1N4747CP/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and factory automation I/O protection circuits requiring stable component supply and long-term lifecycle continuity.
Supply support for 1N4747CP/TR12 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 discrete components for aerospace, defense, and industrial markets.
The 1N47xxAP series was engineered for ruggedized voltage regulation in mission-critical systems where thermal stability, surge resilience, and long-term parametric consistency are mandatory.
FAQ
What is the Zener voltage tolerance of 1N4747CP/TR12?
The 1N4747CP/TR12 has a ±5% Zener voltage tolerance, confirmed by the "A" suffix in its part number per Microsemi's documentation. This means its measured VZ falls between 19.0 V and 21.0 V at 12.5 mA test current and 25 °C lead temperature. The tolerance applies across the full operating temperature range and is verified during 100% production testing.
Does 1N4747CP/TR12 require dry packing per moisture sensitivity level?
No, the 1N4747CP/TR12 is rated IPC/JEDEC J-STD-020B Level 1 for moisture sensitivity, meaning it is exempt from dry pack requirements. Its void-free thermosetting epoxy body prevents moisture ingress, allowing indefinite floor life at ambient conditions without baking or humidity-controlled storage prior to soldering.
What is the maximum surge current rating for 1N4747CP/TR12?
The 1N4747CP/TR12 has a maximum surge current (ISM) rating of 225 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating reflects its ability to safely clamp short-duration transients without degradation, provided average power dissipation remains within the 1 W steady-state limit.
Is 1N4747CP/TR12 RoHS compliant?
Yes, the "e3" suffix in 1N4747CP/TR12 explicitly denotes RoHS compliance. Its terminations use annealed matte-tin plating instead of tin-lead, meeting EU Directive 2011/65/EU and supporting lead-free reflow profiles up to 260 °C for 10 seconds, as validated per MIL-STD-750 Method 2026.
What does the "TR12" suffix indicate in 1N4747CP/TR12?
The "TR12" suffix indicates EIA-296 standard tape-and-reel packaging with 12 mm carrier tape width. This configuration enables automated pick-and-place assembly of the axial-leaded DO-41 device, with component orientation and pocket spacing optimized for high-speed placement equipment used in industrial electronics manufacturing.
1N4747CP/TR12 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):
- 20 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 22 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 15.2 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)
1N4747CP/TR12 FAQ
1.How can I place an order for 1N4747CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4747CP/TR12 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 1N4747CP/TR12 reliable?
The price and inventory of 1N4747CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4747CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4747CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4747CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4747CP/TR12?
1N4747CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4747CP/TR12 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 1N4747CP/TR12?
For technical support, including 1N4747CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4747CP/TR12 requirements.
6.How does Aetrix verify that 1N4747CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4747CP/TR12 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 1N4747CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4747CP/TR12?
All 1N4747CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4747CP/TR12, 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 1N4747CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4747CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4747CP/TR12 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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BZX84C3V3LT1G
onsemi
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MMSZ4682T1G
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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SMAZ12-13-F
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