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Microchip Technology 1N4752CP/TR12
- Part No.:
- 1N4752CP/TR12
- Manufacturer:
- Microchip Technology
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4752CP/TR12.pdf
- Description:
- DIODE ZENER 33V 1W DO204AL
- Quantity:
- Payment:
- Shipping:
Inventory:4,964
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Product details
Overview
1N4752CP/TR12 from Microsemi is a 33 V, 1 W axial-lead Zener diode in DO-41 plastic package with ±5% voltage tolerance, 7.5 mA test current, and 45 Ω dynamic impedance at IZT, used for precision voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4752CP/TR12 datasheet, 1N4752CP/TR12 pinout, 1N4752CP/TR12 application, or 1N4752CP/TR12 equivalent, key selection factors include Zener voltage accuracy, thermal resistance (45 °C/W junction-to-lead), surge current rating (1000 mA), and RoHS-compliant matte-tin plating per MIL-STD-750.
Technical Context
This discrete Zener diode operates in reverse breakdown to maintain stable 33 V regulation across 1–100 mA operating current range, with temperature coefficient near +15 mV/°C (per Figure 3). Its DO-41 package provides flexible through-hole mounting and meets IPC/JEDEC J-STD-020B Level 1 moisture sensitivity without dry pack.
It delivers 1.0 W steady-state power dissipation at lead temperature <105 °C (3/8″ from body) or ambient <45 °C on FR4 board, with forward voltage ≤1.2 V at 200 mA and reverse leakage ≤5 μA at 25.1 V test voltage.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 33 V ±5% at 7.5 mA - defines regulated output level 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 (ZZT) | 45 Ω at IZT = 7.5 mA - determines regulation stiffness under varying load current |
| Max Reverse Leakage (IR) | 5 μA at VR = 25.1 V - ensures low standby power loss in high-impedance bias networks |
| Surge Current (ISM) | 1000 mA (½-sine, 1/120 s) - supports transient overvoltage clamping without failure |
| Thermal Resistance | 45 °C/W junction-to-lead - enables thermal design using lead length as heatsink path |
| Operating Temperature | −65 °C to +150 °C - suitable for industrial and automotive under-hood environments |
Pinout & Package
DO-41 (DO-204AL) plastic axial-lead 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 | Non-banded lead | Connected to lower-potential node; forward conduction path when biased positive relative to cathode |
| Cathode | Banded lead | Connected to higher-potential node during Zener operation; regulates voltage referenced to this terminal |
Key Features
| Feature | Design Value |
|---|---|
| JEDEC-registered Zener | Complies with standardized 1N47xxAP series mechanical and electrical definitions for interchangeability |
| Moisture Sensitivity Level 1 | No dry pack required before PCB assembly - reduces handling cost and process steps |
| RoHS-compliant "e3" option | Matte-tin plating meets EU RoHS Directive 2011/65/EU and China RoHS requirements |
| Nonsensitive to ESD | Qualified per MIL-STD-750 Method 1020 - eliminates need for special ESD handling in production |
| Low thermal resistance | 45 °C/W junction-to-lead - improves power handling vs. glass-body variants (G suffix) |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Stabilizing feedback voltage in linear regulator ICs or op-amp-based shunt regulators. IC Role / Device Role / Timing Role: Provides precise 33 V reference point for error amplifier comparison. Use Value: Maintains ±5% output accuracy over −65 °C to +150 °C with <45 Ω dynamic impedance. | Use Scenario: Protecting downstream circuitry from transient voltage spikes on DC rails. IC Role / Device Role / Timing Role: Shunts excess energy above 33 V to ground during surge events. Use Value: Withstands 1000 mA surge current (1/120 s) without degradation or parametric shift. |
| Signal Level Translation | Current Source Biasing |
Use Scenario: Setting fixed bias points for analog sensor interfaces or logic-level shifters. IC Role / Device Role / Timing Role: Acts as stable voltage node for resistor-divider networks driving comparators or ADC inputs. Use Value: Low 5 μA leakage at 25.1 V ensures minimal current draw in high-impedance bias chains. | Use Scenario: Generating constant-current sources via series resistor + Zener configuration. IC Role / Device Role / Timing Role: Fixes voltage across emitter/base of BJT or gate of MOSFET in current mirror topologies. Use Value: 1.0 W power rating supports ≥30 mA source current with adequate thermal margin on FR4. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4752A | No "P" suffix → glass-body DO-35 package; higher thermal resistance (105 °C/W junction-to-ambient) | Less suitable for high-power-density layouts; requires larger copper area for same power dissipation | Select 1N4752CP/TR12 when DO-41 mechanical robustness and lower thermal resistance are required |
| BZX55C33 | 33 V, ±5%, 500 mW rating; DO-35 package; higher ZZT (~100 Ω) and lower IZM (190 mA) | Not rated for 1 A surge; limited to lower-power reference use where thermal margin is less critical | Choose BZX55C33 only for space-constrained designs accepting reduced surge capability and regulation stiffness |
Compared with 1N4752A and BZX55C33, the 1N4752CP/TR12 offers superior thermal performance (45 °C/W), higher surge rating (1000 mA), and DO-41 mechanical reliability-making it optimal for industrial power supplies requiring long-term stability under thermal cycling.
Availability
1N4752CP/TR12 is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and telecom infrastructure equipment requiring stable component supply and full traceability.
Supply support for 1N4752CP/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 1N4752CP/TR12 belongs to Microsemi's legacy 1N47xxAP Zener series, engineered for ruggedized voltage regulation in harsh-environment systems where long-term parametric stability and MIL-qualified screening options are essential.
FAQ
What is the Zener voltage tolerance of the 1N4752CP/TR12?
The 1N4752CP/TR12 has a nominal Zener voltage of 33 V with a tolerance of ±5%, as indicated by the "A" suffix in its JEDEC designation. This tolerance applies at 7.5 mA test current and 25 °C lead temperature. The "P" suffix confirms plastic DO-41 packaging, and "TR12" denotes tape-and-reel packaging per EIA-296 standard. The 1N4752CP/TR12 maintains this specification across its full operating temperature range of −65 °C to +150 °C.
Does the 1N4752CP/TR12 require dry packing before reflow soldering?
No, the 1N4752CP/TR12 is moisture sensitivity level (MSL) 1 per IPC/JEDEC J-STD-020B, meaning it may be stored indefinitely at ambient conditions without dry pack or baking. Its void-free thermosetting epoxy body and matte-tin plating ensure robust solderability at 260 °C for 10 seconds. This eliminates moisture-related popcorning risk during reflow, simplifying manufacturing for the 1N4752CP/TR12 in high-volume production.
What is the maximum surge current rating for the 1N4752CP/TR12?
The 1N4752CP/TR12 is rated for a maximum surge current (ISM) of 1000 mA, measured using a ½-sine wave pulse of 1/120 second duration at 25 °C ambient. This rating enables reliable transient suppression in DC power rails. The 1N4752CP/TR12 achieves this while maintaining Zener voltage stability and no parametric shift, making it suitable for overvoltage protection in industrial motor drives and telecom power systems.
How does the thermal resistance of the 1N4752CP/TR12 compare to glass-body Zeners?
The 1N4752CP/TR12 has a junction-to-lead thermal resistance of 45 °C/W at 3/8″ (10 mm) lead length, significantly lower than the 105 °C/W junction-to-ambient rating typical of glass-body DO-35 variants like the 1N4752A. This allows the 1N4752CP/TR12 to dissipate 1.0 W more efficiently in lead-mounted configurations. Engineers designing compact power supplies benefit directly from this improved thermal path in the 1N4752CP/TR12.
Is the 1N4752CP/TR12 RoHS compliant?
Yes, the 1N4752CP/TR12 is RoHS compliant, as confirmed by the "e3" designation in Microsemi's official documentation and its matte-tin terminal plating qualified per MIL-STD-750 Method 2026. The "e3" suffix indicates lead-free, RoHS-compliant construction. This compliance applies to both the 1N4752CP/TR12 device itself and its tape-and-reel packaging materials, supporting environmental requirements for global electronics manufacturing.
1N4752CP/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):
- 33 V
- Tolerance:
- ±2%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 45 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 25.1 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)
1N4752CP/TR12 FAQ
1.How can I place an order for 1N4752CP/TR12 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4752CP/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 1N4752CP/TR12 reliable?
The price and inventory of 1N4752CP/TR12 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4752CP/TR12 is usually 5 days.
3.What payment methods are accepted for 1N4752CP/TR12?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4752CP/TR12 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4752CP/TR12?
1N4752CP/TR12 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4752CP/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 1N4752CP/TR12?
For technical support, including 1N4752CP/TR12 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4752CP/TR12 requirements.
6.How does Aetrix verify that 1N4752CP/TR12 is sourced from the original manufacturer or authorized distributors?
All 1N4752CP/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 1N4752CP/TR12 meets industry standards.
7.What is the process for return or replacement of 1N4752CP/TR12?
All 1N4752CP/TR12 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4752CP/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 1N4752CP/TR12 part is unused and in its original packaging.
Return procedure for 1N4752CP/TR12:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4752CP/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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BZT52C15-7-F
Diodes Incorporated
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BZX84C3V3LT1G
onsemi
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MMSZ5245BS-7-F
Diodes Incorporated
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MMSZ4682T1G
onsemi
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BZT52C15S-7-F
Diodes Incorporated
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
Micro Commercial Co
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BZT52C3V6LP-7
Diodes Incorporated
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SMAZ12-13-F
Diodes Incorporated
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