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Microchip Technology 1N4750AP/TR12
- Part No.:
- 1N4750AP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4750AP/TR12.pdf
- Description:
- DIODE ZENER 27V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:8,514
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Product details
Overview
1N4750AP/TR12 from Microsemi is a 1 W, 27 V ±5% axial-lead silicon Zener diode in DO-41 plastic package, rated for 9.5 mA test current, 35 Ω dynamic impedance at IZT, and 5 μA reverse leakage at 20.6 V, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4750AP/TR12 datasheet, 1N4750AP/TR12 pinout, 1N4750AP/TR12 application, or 1N4750AP/TR12 equivalent, key selection criteria include Zener voltage tolerance (±5%), thermal resistance (45 °C/W junction-to-lead), surge current rating (750 mA), operating temperature range (–65 °C to +150 °C), and RoHS-compliant "e3" plating option.
Technical Context
This device operates in reverse breakdown mode to maintain stable output voltage across varying load and line conditions. Its 27 V nominal Zener voltage exhibits a positive temperature coefficient above ~5.6 V, with typical TC of +8.5 mV/°C per Figure 3 in the datasheet.
The DO-41 package supports axial through-hole mounting with cathode band polarity marking, and its 45 °C/W junction-to-lead thermal resistance enables reliable 1 W dissipation at lead temperature ≤105 °C with 10 mm lead length from body.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 27 V ±5% at 9.5 mA - sets precise regulation point for feedback loops and reference rails |
| Power Dissipation | 1.0 W at TL < 105 °C - defines maximum continuous steady-state power under specified lead temp condition |
| Dynamic Impedance (ZZT) | 35 Ω at IZT = 9.5 mA - determines regulation stiffness and output voltage variation under load transients |
| Reverse Leakage Current | 5 μA max at VR = 20.6 V - ensures low standby power loss in high-impedance bias networks |
| Surge Current (ISM) | 750 mA peak (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Operating Temperature | –65 °C to +150 °C - enables use in automotive under-hood, industrial control, and aerospace environments |
| Thermal Resistance | 45 °C/W junction-to-lead - allows thermal design with known lead-length-dependent derating |
Pinout & Package
DO-41 (DO-204AL) plastic axial-leaded package with cathode indicated by 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 | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side in regulation circuit; reverse-biased during Zener operation |
| Cathode | Zener breakdown terminal / voltage reference output | Banded end; connected to regulated rail; supplies stable 27 V when reverse-biased above knee voltage |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered 1N4750A series | Industry-standard footprint and electrical behavior ensures compatibility with legacy designs and PCB footprints |
| Plastic P-suffix construction | Lower thermal resistance (45 °C/W) vs. glass-body G-suffix variants, improving power handling in compact layouts |
| Moisture Sensitivity Level 1 | No dry pack required per IPC/JEDEC J-STD-020B - simplifies SMT handling and reduces assembly cost |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production and field service |
| RoHS-compliant "e3" option | Matte-tin plating meets EU RoHS Directive 2011/65/EU - supports compliance-critical industrial and medical designs |
Applications
| Power Supply Reference | Overvoltage Protection |
|---|---|
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 27 V reference to error amplifier input. Use Value: Maintains ±5% output accuracy over –65 °C to +150 °C and 1–100 mA operating current range. | Use Scenario: Clamping transient spikes on 24 V DC bus lines in PLC I/O modules. IC Role / Device Role / Timing Role: Shunt protection device diverting surge energy above 27 V to ground. Use Value: Withstands 750 mA surge current (1/120 s) without degradation, protecting downstream MOSFETs and logic. |
| Voltage Monitor Threshold | Signal Level Translation |
Use Scenario: Setting trip point for brown-out detection in microcontroller reset circuits. IC Role / Device Role / Timing Role: Precision threshold element triggering comparator when supply drops below 27 V. Use Value: Low 5 μA leakage at 20.6 V ensures minimal current draw in always-on monitoring paths. | Use Scenario: Biasing op-amp input stages to establish 27 V common-mode level in analog front-ends. IC Role / Device Role / Timing Role: Stable DC bias source enabling rail-to-rail signal swing around 27 V reference. Use Value: 35 Ω dynamic impedance minimizes reference shift under varying op-amp input bias currents. |
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 TR12 tape-and-reel packaging; bulk or ammo-pack only | Same electrical specs but unsuitable for automated pick-and-place | Select 1N4750AP/TR12 for SMT line integration; choose 1N4750A for hand-soldered prototyping |
| MMSZ5256B-TP | Surface-mount SOD-123 package; 27 V ±5%, 500 mW rating; higher ZZT (70 Ω) | Lower power handling and different thermal path; not drop-in for through-hole boards | Use MMSZ5256B-TP only when board space constraints require SMT and 500 mW suffices |
Compared with 1N4750A and MMSZ5256B-TP, the 1N4750AP/TR12 uniquely combines 1 W power capability, DO-41 axial form factor, tape-and-reel delivery, and verified 45 °C/W thermal resistance - making it optimal for high-reliability through-hole power regulation where automated assembly and thermal margin are critical.
Availability
1N4750AP/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive control units, and telecom infrastructure equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4750AP/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 robust, JEDEC-standardized voltage regulation in harsh-environment power systems where stability, thermal performance, and long-term reliability are mandatory.
FAQ
What is the Zener voltage tolerance for 1N4750AP/TR12?
The 1N4750AP/TR12 has a nominal Zener voltage of 27 V with a tolerance of ±5%, as confirmed by the "A" suffix in the part number per Microsemi's datasheet revision C. This tolerance applies at 9.5 mA test current and 25 °C lead temperature. The "P" denotes plastic DO-41 packaging, and "TR12" specifies 12 mm tape pitch reel packaging.
Does 1N4750AP/TR12 meet RoHS requirements?
Yes, the 1N4750AP/TR12 is RoHS compliant when ordered with the "e3" suffix (e.g., 1N4750AP/TR12-e3), indicating annealed matte-tin plating per JEDEC standards. The base part number without "e3" uses traditional tin-lead plating. Always verify the full orderable part number with Aetrix Electronics to confirm RoHS status for your shipment.
What is the maximum surge current rating for 1N4750AP/TR12?
The 1N4750AP/TR12 is rated for 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, as specified in the Electrical Characteristics table. This rating supports transient clamping in 24 V system protection applications without permanent degradation.
Can 1N4750AP/TR12 be used in surface-mount designs?
No - the 1N4750AP/TR12 uses a DO-41 axial-leaded package intended for through-hole mounting. For surface-mount equivalents, Microsemi offers the SMAJ4750A (SMA package) and MLL4750A (SOD-123 variant), both sharing the same 27 V ±5% Zener voltage but differing in thermal performance and package dimensions.
What is the thermal resistance of 1N4750AP/TR12 and how does it affect layout?
The 1N4750AP/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 10 mm lead length from body. This means each watt dissipated raises junction temperature 45 °C above lead temperature. To maintain reliability, keep lead temperature below 105 °C - achieved by minimizing trace resistance, using adequate copper pour, and avoiding excessive solder mask coverage near leads.
1N4750AP/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:
- ±5%
- 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)
1N4750AP/TR12 FAQ
1.How can I place an order for 1N4750AP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4750AP/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 1N4750AP/TR12 reliable?
The price and inventory of 1N4750AP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4750AP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4750AP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4750AP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4750AP/TR12?
1N4750AP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4750AP/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 1N4750AP/TR12?
For technical support, including 1N4750AP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4750AP/TR12 requirements.
6.How does Aetrix verify that 1N4750AP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4750AP/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 1N4750AP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4750AP/TR12?
All 1N4750AP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4750AP/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 1N4750AP/TR12 part is unused and in its original packaging.
Return procedure for 1N4750AP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4750AP/TR12 Tags
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