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Microchip Technology 1N4756CP/TR12
- Part No.:
- 1N4756CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4756CP/TR12.pdf
- Description:
- DIODE ZENER 47V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,415
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Product details
Overview
1N4756CP/TR12 from Microsemi is a 1.0 W plastic-encapsulated Zener diode with nominal Zener voltage of 47 V, ±5% tolerance (A suffix), and DO-41 package. It regulates voltage across wide current and temperature ranges (-65°C to +150°C), features 80 Ω dynamic impedance at 5.5 mA test current, and delivers up to 95 mA maximum regulator current at 50°C lead temperature - used in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4756CP/TR12 datasheet, 1N4756CP/TR12 pinout, 1N4756CP/TR12 application, or 1N4756CP/TR12 equivalent, key selection criteria include Zener voltage accuracy, thermal resistance (45°C/W junction-to-lead), surge current rating (1500 mA), RoHS-compliant "e3" plating, and tape-and-reel packaging (TR12).
Technical Context
This Zener operates in reverse breakdown mode with cathode band indicating polarity; regulation occurs when the banded end is held positive relative to the anode. Its 47 V nominal voltage is specified at 5.5 mA test current (IZT) and 25°C lead temperature, with knee impedance of 19 Ω measured at 0.25 mA (IZK).
Thermal performance is defined for two mounting conditions: 45°C/W junction-to-lead at 10 mm lead length, and 105°C/W junction-to-ambient on FR4 with 4 mm² copper pads. Forward voltage is ≤1.2 V at 200 mA, and ESD immunity meets MIL-STD-750 Method 1020.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 47 V ±5% at 5.5 mA - sets precise DC reference level in feedback loops |
| Power Dissipation | 1.0 W at 25°C lead temp - defines max continuous steady-state power handling |
| Dynamic Impedance (Zzt) | 80 Ω at IZT = 5.5 mA - determines output voltage stability under load variation |
| Max Regulator Current (Izm) | 95 mA at TL = 50°C - limits usable current range before thermal derating |
| Reverse Leakage (Ir) | 5 μA at VR = 35.8 V - ensures low quiescent current in standby regulation |
| Surge Current (Ism) | 1500 mA (½-sine, 1/120 s) - supports transient overvoltage clamping capability |
| Thermal Resistance | 45°C/W junction-to-lead - enables thermal design with discrete lead-mounting |
Pinout & Package
DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by colored band; terminals are nonsolderable tin-lead or RoHS-compliant matte tin plating per MIL-STD-750 Method 2026.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Current sink in reverse bias | Connected to lower-potential node; carries full Zener current during regulation |
| Cathode (banded end) | Regulated output node | Provides stable 47 V reference when biased positive relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N47xxAP series | Ensures industry-standard form, fit, and function compatibility across suppliers |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and simplifies SMT handling and storage |
| RoHS-compliant "e3" plating | Meets environmental compliance without sacrificing solderability or reliability |
| Tape-and-reel packaging (TR12) | Enables automated pick-and-place assembly for high-volume production |
| Nonsensitive to ESD (MIL-STD-750) | Reduces handling precautions and eliminates need for special ESD controls |
Applications
| Power Supply Voltage Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator or switching converter error amplifier. IC Role / Device Role / Timing Role: Provides fixed 47 V reference point for comparator or op-amp input. Use Value: Maintains ±5% output accuracy over -65°C to +150°C and 1–95 mA operating range. | Use Scenario: Limiting transient voltage spikes on DC bus lines in industrial control systems. IC Role / Device Role / Timing Role: Shunts excess energy to ground when line voltage exceeds 47 V. Use Value: Withstands 1500 mA surge current (1/120 s) without degradation, protecting downstream ICs. |
| Signal Level Translation | Temperature-Stable Bias Generator |
Use Scenario: Converting 0–5 V logic signals to 0–47 V analog levels for legacy sensor interfaces. IC Role / Device Role / Timing Role: Acts as passive clamp to define upper signal rail. Use Value: Low 80 Ω dynamic impedance ensures minimal signal distortion at 5.5 mA operating point. | Use Scenario: Generating stable bias current for precision amplifiers in automotive engine control units. IC Role / Device Role / Timing Role: Supplies temperature-compensated reference current via series resistor. Use Value: Temperature coefficient optimized for 47 V devices (see Figure 3) minimizes drift over operating range. |
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 "P" suffix indicates glass-body construction; higher thermal resistance (≈60°C/W vs. 45°C/W) | Less suitable for high-power-density PCB layouts requiring efficient heat conduction through leads | Select 1N4756CP/TR12 when lead-mounted thermal management or moisture-insensitive handling is required |
| MMBZ5275BS-7-F | SOT-23 surface-mount package; 47 V ±5%, but rated at only 225 mW and 10 mA IZT | Not interchangeable in through-hole designs; limited surge and power capability | Choose MMBZ5275BS-7-F only for space-constrained, low-power biasing where reflow compatibility is essential |
Compared with 1N4756A and MMBZ5275BS-7-F, the 1N4756CP/TR12 offers superior thermal performance in axial-lead mounting, full 1 W power rating at lead temperature, and tape-and-reel readiness - making it optimal for industrial power supplies requiring robust, production-ready Zener regulation.
Availability
1N4756CP/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom line-card protection requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N4756CP/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 and mixed-signal components for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for general-purpose voltage regulation in harsh-environment applications where thermal stability, moisture resilience, and JEDEC-standard interoperability are critical.
FAQ
What is the Zener voltage tolerance of the 1N4756CP/TR12?
The 1N4756CP/TR12 has a nominal Zener voltage of 47 V with ±5% tolerance, indicated by the "A" suffix in the part number. This tolerance is guaranteed at 5.5 mA test current and 25°C lead temperature per JEDEC specification. The "P" denotes plastic encapsulation, and "TR12" specifies tape-and-reel packaging containing 12,000 units per reel.
Does the 1N4756CP/TR12 require dry packing before PCB assembly?
No, the 1N4756CP/TR12 is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it can be stored and assembled without dry pack or baking. Its void-free thermosetting epoxy body and RoHS-compliant matte-tin plating ensure reliable solderability directly from reel without preconditioning.
What is the maximum surge current rating for the 1N4756CP/TR12?
The 1N4756CP/TR12 supports 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 enables effective transient voltage suppression in DC power rails without device failure under short-duration overvoltage events.
How does the thermal resistance of the 1N4756CP/TR12 compare between lead and ambient mounting?
The 1N4756CP/TR12 has a junction-to-lead thermal resistance of 45°C/W at 10 mm lead length, but junction-to-ambient rises to 105°C/W when mounted on FR4 with standard 4 mm² copper pads. This difference means lead-temperature derating must be applied first - power drops to zero at TL = 105°C - while ambient derating applies only if board-level cooling is insufficient.
Can the 1N4756CP/TR12 replace the 1N4756A in existing designs?
Yes, the 1N4756CP/TR12 is a direct functional replacement for the 1N4756A, sharing identical electrical specifications including 47 V Zener voltage, ±5% tolerance, and 1 W power rating. The "P" suffix confirms plastic construction with lower thermal resistance than the glass-body 1N4756A, and "TR12" adds tape-and-reel compatibility - no PCB layout changes are needed.
1N4756CP/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):
- 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/TR12 FAQ
1.How can I place an order for 1N4756CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4756CP/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 1N4756CP/TR12 reliable?
The price and inventory of 1N4756CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4756CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4756CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4756CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4756CP/TR12?
1N4756CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4756CP/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 1N4756CP/TR12?
For technical support, including 1N4756CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4756CP/TR12 requirements.
6.How does Aetrix verify that 1N4756CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4756CP/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 1N4756CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4756CP/TR12?
All 1N4756CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4756CP/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 1N4756CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4756CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4756CP/TR12 Tags
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