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Microchip Technology 1N4750CP/TR12
- Part No.:
- 1N4750CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4750CP/TR12.pdf
- Description:
- DIODE ZENER 27V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:9,140
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Product details
Overview
1N4750CP/TR12 from Microsemi is a 27 V, 1 W plastic-encapsulated Zener diode with ±5% voltage tolerance, 9.5 mA test current (IZT), and 35 Ω dynamic impedance (ZZT) at IZT. It operates from –65°C to +150°C and regulates voltage in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4750CP/TR12 datasheet, 1N4750CP/TR12 pinout, 1N4750CP/TR12 application, or 1N4750CP/TR12 equivalent, key selection factors include its DO-41 package, 27 V nominal Zener voltage, 1 W steady-state power rating at TL < 105°C, 35 Ω dynamic impedance, and RoHS-compliant "e3" plating with tape-and-reel packaging (TR12).
Technical Context
This axial-lead Zener diode functions as a shunt voltage regulator by maintaining a stable 27 V across its terminals when reverse-biased above its breakdown threshold. Its design supports operation under continuous DC current up to 150 mA (IZM) and transient surge currents up to 750 mA (ISM), with thermal resistance of 45°C/W junction-to-lead at 10 mm lead length.
The device exhibits a typical temperature coefficient near +10 mV/°C for 27 V Zeners (per Figure 3), and its knee impedance (ZZK = 34 Ω at IZK = 0.25 mA) ensures stable regulation at low bias currents. Polarity is marked by a cathode band; regulation requires the banded end to be positive relative to the anode.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (Vz) | 27 V ±5% at 9.5 mA - defines precise regulation point for feedback loops and reference generation |
| Power Dissipation | 1.0 W at TL < 105°C - sets maximum continuous thermal load on PCB traces and heatsinking |
| Dynamic Impedance (ZZT) | 35 Ω at IZT = 9.5 mA - determines output voltage stability under varying load current |
| Max Regulator Current (IZM) | 150 mA at TA = 50°C - limits usable current range before thermal runaway or derating |
| Reverse Leakage (IR) | 5 μA max at VR = 20.6 V - ensures minimal quiescent current in standby or high-impedance bias networks |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal modeling using standard lead-length mounting assumptions |
| Operating Temperature | –65°C to +150°C - supports industrial, automotive under-hood, and military-grade environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by a single color 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 | Current sink in reverse bias | Connected to lower-potential node; carries full Zener current during regulation |
| Cathode (banded end) | Regulated output node | Provides stable 27 V reference when biased positively relative to anode |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4750A series | Ensures cross-manufacturer compatibility and standardized test conditions per industry specification |
| Plastic P-suffix construction | Delivers lower thermal resistance vs. glass-body (G-suffix) variants, improving power handling in compact layouts |
| Moisture Sensitivity Level 1 | Eliminates dry-pack requirement and floor-life constraints for SMT reflow or manual assembly |
| RoHS-compliant "e3" plating | Meets global environmental compliance without sacrificing solderability or long-term reliability |
| Tape-and-reel packaging (TR12) | Enables automated pick-and-place placement with EIA-296 standard carrier tape geometry |
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: Provides precise 27 V reference for error amplifier input or voltage divider ratio setting. Use Value: Maintains ±5% output accuracy across temperature and line/load variations due to low ZZT and stable TC. | Use Scenario: Protecting downstream circuitry from transient voltage spikes exceeding 27 V. IC Role / Device Role / Timing Role: Acts as shunt clamp, diverting excess current when input voltage exceeds Vz. Use Value: Limits peak voltage to 27 V ±5% with 750 mA surge capability, preventing damage to sensitive analog or logic inputs. |
| Signal Level Shifting | Current Source Biasing |
Use Scenario: Generating fixed DC offset for op-amp inputs or ADC reference points in sensor interfaces. IC Role / Device Role / Timing Role: Supplies stable bias voltage independent of supply rail fluctuations. Use Value: Delivers 27 V reference with <5 μA leakage at 20.6 V, minimizing loading on high-impedance signal paths. | Use Scenario: Setting constant current in LED driver or transistor bias networks via series resistor. IC Role / Device Role / Timing Role: Fixes voltage drop across current-setting resistor to define ILED or IB. Use Value: Enables predictable current control with 1 W dissipation margin and 150 mA IZM headroom. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4750A | No "P" suffix indicates glass-body construction; higher thermal resistance (105°C/W vs. 45°C/W) | Less suitable for high-power-density PCBs requiring efficient heat conduction through leads | Select 1N4750CP/TR12 when thermal performance and moisture robustness are critical |
| MMSZ5250B | Surface-mount SOD-123 package; 27 V ±5%, 200 mW rating, 30 Ω ZZT at 20 mA | Limited to low-power applications; not interchangeable without layout change or derating | Choose MMSZ5250B only for space-constrained designs where 1 W dissipation is unnecessary |
Compared with 1N4750A and MMSZ5250B, the 1N4750CP/TR12 offers superior thermal management in axial-lead form, guaranteed RoHS compliance via "e3", and tape-and-reel readiness-making it optimal for industrial power supplies requiring long-term reliability and automated assembly.
Availability
1N4750CP/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, and precision reference designs requiring stable component supply and full traceability.
Supply support for 1N4750CP/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, mixed-signal, and RF solutions for aerospace, defense, and industrial markets.
The 1N47xxAP series was designed specifically for ruggedized, high-stability voltage regulation in mission-critical power systems where thermal resilience, moisture immunity, and JEDEC-standard consistency are mandatory.
FAQ
What is the Zener voltage tolerance of the 1N4750CP/TR12?
The 1N4750CP/TR12 has a nominal Zener voltage of 27 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance applies under standard test conditions (TL = 25°C ±8°C, 90 seconds after current application) and ensures predictable regulation in feedback and reference circuits where tight voltage accuracy is required.
Does the 1N4750CP/TR12 require dry packing before reflow soldering?
No, the 1N4750CP/TR12 is rated Moisture Sensitivity Level 1 per IPC/JEDEC J-STD-020B, meaning it has no floor-life limitation and does not require dry packing prior to soldering. Its plastic encapsulation and void-free epoxy body eliminate moisture absorption concerns, supporting both wave and reflow processes without preconditioning.
What is the maximum surge current rating for the 1N4750CP/TR12?
The 1N4750CP/TR12 supports a maximum non-repetitive surge current (ISM) of 750 mA, measured using a ½ sine-wave pulse of 1/120 second duration at 25°C ambient. This rating enables reliable clamping of short-duration transients in power rails and interface lines without degradation of the Zener junction.
How does the thermal resistance of the 1N4750CP/TR12 compare to glass-body versions?
The 1N4750CP/TR12 has a junction-to-lead thermal resistance of 45°C/W at 10 mm lead length, significantly lower than the 105°C/W typical for glass-body 1N4750A variants. This 57% improvement allows higher continuous power dissipation in thermally constrained layouts and reduces risk of thermal runaway under sustained load.
Is the 1N4750CP/TR12 compatible with lead-free soldering processes?
Yes, the 1N4750CP/TR12 features RoHS-compliant annealed matte-tin plating ("e3" suffix) and is qualified for soldering at 260°C for 10 seconds maximum. Its terminations meet MIL-STD-750 Method 2026 and support both leaded and lead-free reflow profiles without dewetting or intermetallic formation issues.
1N4750CP/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):
- 27 V
- Tolerance:
- ±2%
- Power - Max:
- 1 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:
- -65°C ~ 150°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AL (DO-41)
1N4750CP/TR12 FAQ
1.How can I place an order for 1N4750CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4750CP/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 1N4750CP/TR12 reliable?
The price and inventory of 1N4750CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4750CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4750CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4750CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4750CP/TR12?
1N4750CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4750CP/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 1N4750CP/TR12?
For technical support, including 1N4750CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4750CP/TR12 requirements.
6.How does Aetrix verify that 1N4750CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4750CP/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 1N4750CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4750CP/TR12?
All 1N4750CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4750CP/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 1N4750CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4750CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4750CP/TR12 Tags
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MMBZ5240B-7-F
Diodes Incorporated
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MM5Z5V1ST1G
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