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Microchip Technology 1N4750P/TR12
- Part No.:
- 1N4750P/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4750P/TR12.pdf
- Description:
- DIODE ZENER 27V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:7,997
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Product details
Overview
1N4750P/TR12 from Microsemi is a 27 V, 1 W plastic-encapsulated Zener diode with ±5% voltage tolerance, 9.5 mA test current, and 35 Ω dynamic impedance at IZT, designed for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4750P/TR12 datasheet, 1N4750P/TR12 pinout, 1N4750P/TR12 application, or 1N4750P/TR12 equivalent, key selection criteria include Zener voltage stability across temperature, low knee impedance (0.5 mA test), surge current rating (750 mA), and DO-41 package compatibility with axial-leaded PCB layouts.
Technical Context
This device operates in reverse breakdown to maintain stable output voltage under varying load and line conditions. It features a sharp knee at 0.5 mA (ZZK = 34 Ω), enabling reliable low-current regulation, and exhibits a positive temperature coefficient near +5 mV/°C at 27 V per Figure 3 of the datasheet.
Thermal resistance is specified as 45 °C/W junction-to-lead (3/8" lead length) and 105 °C/W junction-to-ambient on FR4 with defined copper pad geometry. Forward voltage is ≤1.2 V at 200 mA, confirming standard silicon PN junction behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% at 9.5 mA - defines nominal regulation point with tight production control |
| Power Dissipation | 1.0 W at TL < 105°C - supports continuous operation with adequate lead heatsinking |
| Dynamic Impedance (ZZT) | 35 Ω at 9.5 mA - ensures minimal output voltage variation under load transients |
| Knee Impedance (ZZK) | 34 Ω at 0.5 mA - enables stable regulation even at very low bias currents |
| Surge Current (ISM) | 750 mA (½-sine, 1/120 s) - withstands short-duration overvoltage events without degradation |
| Reverse Leakage (IR) | 5 μA max at 20.6 V - guarantees low standby power loss in high-impedance bias networks |
| Operating Temperature | –65°C to +150°C - suitable for industrial and automotive under-hood environments |
Pinout & Package
1N4750P/TR12 uses the DO-41 (DO-204AL) axial-leaded plastic package with cathode indicated by a band; terminals are non-polarized for through-hole mounting and require no dry pack per IPC/JEDEC J-STD-020B Level 1 moisture classification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit ground or lower potential node during regulation |
| Cathode | Zener breakdown terminal / regulated output node | Connected to unregulated input; delivers stable 27 V to load when reverse-biased |
Key Features
| Feature | Design Value |
|---|---|
| Plastic encapsulation (P suffix) | Lower thermal resistance vs. glass-body variants - improves power handling in compact layouts |
| RoHS-compliant "e3" option | Matte-tin plating meets lead-free soldering requirements without compromising solderability |
| JEDEC 1N47xxA registration | Industry-standard footprint and electrical behavior - ensures design reuse and sourcing flexibility |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special handling in assembly |
| Tape-and-reel packaging (TR suffix) | Standard EIA-296 format - enables automated pick-and-place for high-volume manufacturing |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator circuits or op-amp reference nodes. IC Role / Device Role / Timing Role: Provides precise 27 V reference to error amplifier inputs for output voltage accuracy. Use Value: ±5% VZ tolerance and low ZZK ensure <1% total output error across operating current range. | Use Scenario: Protecting downstream ICs from transient voltage spikes on DC rails. IC Role / Device Role / Timing Role: Shunts excess energy to ground when rail exceeds 27 V, limiting peak voltage. Use Value: 750 mA surge rating allows repeated clamping of 100–200 ns transients without parametric shift. |
| Current Source Bias | Signal Level Translation |
Use Scenario: Generating stable bias current for transistor amplifiers or sensor excitation. IC Role / Device Role / Timing Role: Forms constant-current sink with series resistor, leveraging sharp Zener knee. Use Value: 34 Ω ZZK at 0.5 mA enables sub-1% current variation over temperature and supply drift. | Use Scenario: Shifting logic-level signals between incompatible voltage domains (e.g., 3.3 V → 27 V interface). IC Role / Device Role / Timing Role: Acts as bidirectional level translator via controlled reverse conduction. Use Value: Low leakage (<5 μA) prevents loading of source logic while maintaining clean threshold switching. |
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 TR suffix - bulk bag packaging; identical electrical specs and DO-41 package | Not optimized for automated assembly; requires manual placement or tube-to-tape conversion | Select 1N4750P/TR12 for SMT line integration; choose 1N4750A for prototyping or low-volume hand-soldering |
| BZX85C27 | Higher ZZT (60 Ω), wider tolerance (±10%), different DO-41 mechanical dimensions per Philips spec | Less stable regulation under dynamic loads; reduced accuracy in precision references | Use BZX85C27 only where cost sensitivity outweighs regulation stability and traceability requirements |
Compared with 1N4750A and BZX85C27, the 1N4750P/TR12 offers verified tape-and-reel readiness, tighter 5% tolerance, and lower 35 Ω dynamic impedance - delivering superior voltage stability in production-grade power management designs.
Availability
1N4750P/TR12 is available at Aetrix Electronics and suitable for power supply reference, overvoltage clamp, and current source bias applications requiring stable component supply, consistent parametric performance, and RoHS-compliant manufacturing support.
Supply support for 1N4750P/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 engineered for robust voltage regulation in harsh-environment power systems, emphasizing thermal stability, surge resilience, and JEDEC-standard interoperability.
FAQ
What is the Zener voltage tolerance for 1N4750P/TR12?
The 1N4750P/TR12 has a nominal Zener voltage of 27 V with a ±5% tolerance, as confirmed by the "A" suffix in its JEDEC designation and validated in the Electrical Characteristics table on page 1 of the Microsemi datasheet. This tolerance applies at 9.5 mA test current and 25°C lead temperature. The 1N4750P/TR12 does not support tighter tolerances like ±1% or ±2% - those require suffixes "D" or "C", respectively.
Does 1N4750P/TR12 support lead-free soldering processes?
Yes, the 1N4750P/TR12 is RoHS compliant with an "e3" suffix option, featuring annealed matte-tin plating qualified per MIL-STD-750 Method 2026. It withstands solder temperatures up to 260°C for 10 seconds, making it compatible with standard lead-free reflow profiles. The base part number 1N4750P/TR12 includes this finish unless otherwise specified.
What is the maximum surge current rating for 1N4750P/TR12?
The 1N4750P/TR12 has a maximum surge current (ISM) rating of 750 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25°C ambient, as stated in the Electrical Characteristics table. This rating reflects single-event capability; repeated surges require derating per thermal limits in Figure 1 of the datasheet.
How is polarity marked on the 1N4750P/TR12 package?
The 1N4750P/TR12 uses a cathode band to indicate polarity: the banded end is the cathode and must be held at a higher potential than the anode for Zener regulation. This marking aligns with JEDEC DO-41 standards and is visible on the black epoxy body. Forward conduction occurs when the anode is positive relative to the banded cathode.
What package type does 1N4750P/TR12 use, and what are its thermal characteristics?
The 1N4750P/TR12 uses the DO-41 (DO-204AL) axial-leaded plastic package. Its thermal resistance is 45°C/W junction-to-lead at 3/8" (10 mm) lead length, and 105°C/W junction-to-ambient on FR4 with specified copper pad geometry. These values enable 1.0 W dissipation at TL < 105°C or TA < 45°C, per the Maximum Ratings table.
1N4750P/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:
- ±10%
- 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)
1N4750P/TR12 FAQ
1.How can I place an order for 1N4750P/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4750P/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 1N4750P/TR12 reliable?
The price and inventory of 1N4750P/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4750P/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4750P/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4750P/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4750P/TR12?
1N4750P/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4750P/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 1N4750P/TR12?
For technical support, including 1N4750P/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4750P/TR12 requirements.
6.How does Aetrix verify that 1N4750P/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4750P/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 1N4750P/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4750P/TR12?
All 1N4750P/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4750P/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 1N4750P/TR12 part is unused and in its original packaging.
Return procedure for 1N4750P/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4750P/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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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
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SMAZ12-13-F
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