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Nexperia USA Inc. 1N4744A,133
- Part No.:
- 1N4744A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4744A,133.pdf
- Description:
- DIODE ZENER 15V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:3,713
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Product details
Overview
1N4744A,133 from Nexperia is a 15 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 500 mA maximum forward current, used for low-voltage stabilization in linear power supplies and reference circuits.
For engineers reviewing the 1N4744A,133 datasheet, 1N4744A,133 pinout, 1N4744A,133 application, or 1N4744A,133 equivalent, key selection criteria include nominal Zener voltage (15 V), test current (17 mA), dynamic impedance (14 Ω), reverse leakage (≤5 µA at 12 V), and thermal resistance (110 K/W).
Technical Context
This device operates as a two-terminal voltage reference by maintaining a stable reverse breakdown voltage across its terminals under controlled current conditions. It exhibits a typical differential resistance of 14 Ω at 17 mA test current and supports up to 1000 mW power dissipation at 50 °C ambient temperature.
The diode features axial leads in a small hermetically sealed glass envelope, with cathode identified by a band. Its junction-to-tie-point thermal resistance is 110 K/W with 4 mm lead length, enabling predictable thermal performance in through-hole PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener voltage (VZ) | 15 V nominal ±5 % - defines precise DC reference level for regulation or biasing |
| Test current (Itest) | 17 mA - current at which VZ is specified; sets minimum operating point for stable regulation |
| Differential resistance (rdif) | 14 Ω - low dynamic impedance ensures minimal output voltage variation under load changes |
| Reverse current (IR) | ≤5 µA at 12 V - confirms tight leakage control below breakdown, critical for low-power bias networks |
| Total power dissipation (Ptot) | 1000 mW - maximum steady-state power handling at Tamb = 50 °C; derates above that temperature |
| Forward voltage (VF) | ≤1.2 V at IF = 200 mA - enables use as clamping or protection diode in forward conduction mode |
| Junction temperature range | −65 °C to +200 °C - wide operational range supports industrial and automotive under-hood applications |
Pinout & Package
Package: SOD66 (DO-41), hermetically sealed glass, axial-leaded, 2-terminal through-hole package. Cathode indicated by a colored band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where stable Zener voltage develops |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes current path during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or harsh environments |
| ±5 % Zener tolerance | Enables direct use in precision reference designs without external trimming or calibration |
| 1000 mW power rating | Supports higher-current regulation (up to ~67 mA at 15 V) without external heat sinking in standard layouts |
| Low dynamic impedance (14 Ω) | Minimizes output voltage shift under varying load currents-critical for analog sensor biasing |
| Wide junction temperature range | Allows reliable operation from cold-start (-65 °C) to high-temperature industrial settings (+200 °C) |
Applications
| Linear Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated DC outputs in discrete linear regulators (e.g., with series pass transistor). IC Role / Device Role / Timing Role: Two-terminal shunt voltage reference providing fixed 15 V reference for error amplifier feedback. Use Value: Delivers stable regulation with ≤14 Ω impedance, ensuring <15 mV output deviation over 10–60 mA load range. |
Use Scenario: Clamping transient surges on 12 V logic rails or sensor inputs to prevent damage. IC Role / Device Role / Timing Role: Reverse-biased Zener acting as crowbar element when input exceeds 15 V threshold. Use Value: Activates at 15 V ±5 % with fast response (<100 ns), limiting peak voltage to safe levels before downstream ICs fail. |
| Current Source Bias Network | Analog Sensor Excitation |
Use Scenario: Generating stable bias current for op-amp input stages or transistor amplifiers. IC Role / Device Role / Timing Role: Zener + series resistor forming constant-current source via regulated voltage drop. Use Value: Enables 1.13 mA bias current (with 13 kΩ resistor) with <0.5 % drift over −40 °C to +85 °C ambient. |
Use Scenario: Providing excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs) requiring low-noise, stable reference. IC Role / Device Role / Timing Role: Low-impedance 15 V reference source minimizing common-mode error in ratiometric measurements. Use Value: 14 Ω dynamic impedance reduces noise coupling; ≤5 µA leakage avoids loading high-impedance sensor nodes. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4744A-T | Same electrical specs; tape-and-reel packaging (vs. bulk/ammopack for ,133); identical SOD66 package | No functional difference; suited for automated SMT assembly lines requiring reel-fed feeders | Select when high-volume pick-and-place integration is required; otherwise, ,133 is optimal for manual or low-volume prototyping |
| BZX55-C15 | 15 V ±5 %, but lower Ptot = 500 mW and higher rdif = 30 Ω; DO-35 package (smaller, less robust) | Limited to lower-power biasing; unsuitable for >33 mA regulation or surge clamping above 500 mW | Choose only for space-constrained, low-power designs where thermal margin and clamping energy are non-critical |
Compared with 1N4744A,133, the 1N4744A-T offers identical regulation performance with optimized packaging for automation, while BZX55-C15 trades power handling and impedance stability for smaller size-making the ,133 the preferred choice for robust, medium-power Zener applications.
Availability
1N4744A,133 is available at Aetrix Electronics and suitable for linear power supply references, overvoltage protection clamps, and analog sensor excitation circuits requiring stable component supply and long-term parametric consistency.
Supply support for 1N4744A,133 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
Nexperia is a global semiconductor expert focused on high-volume, high-reliability standard products including logic, discretes, MOSFETs, and ESD protection devices.
The 1N47xxA series belongs to Nexperia's Zener diode portfolio, engineered specifically for stable voltage reference and clamping in cost-sensitive, high-reliability industrial and consumer power systems.
FAQ
What is the maximum continuous reverse current the 1N4744A,133 can sustain without degradation?
The device is rated for a working current (IZ) of 11.4 mA at nominal Zener voltage, but its absolute maximum non-repetitive peak reverse current (IZSM) is 304 mA. Continuous operation must remain within the 1000 mW power limit-so at 15 V, max sustainable IZ is ~67 mA with adequate heatsinking and ambient derating.
Can the 1N4744A,133 be used in forward conduction mode, and what is its forward voltage behavior?
Yes-it functions as a standard silicon rectifier in forward bias. At 200 mA forward current, its typical forward voltage is ≤1.2 V, with a soft knee near 0.7 V. This allows dual-use as both Zener reference and low-drop clamp, though forward conduction is not its primary design intent.
How does thermal resistance affect regulation accuracy in compact PCB layouts?
With Rth(j-t) = 110 K/W and 4 mm lead length, a 100 mW dissipation raises junction temperature by ~11 °C above tie-point. Since VZ has a positive temperature coefficient (~+0.075 %/°C for this part), regulation shifts ~11 mV per 100 mW rise-requiring layout-aware thermal design for <0.1 % stability.
Is the 1N4744A,133 RoHS compliant and halogen-free?
Yes-Nexperia certifies the 1N4744A,133 as RoHS compliant (2011/65/EU) and halogen-free per IEC 61249-2-21. The SOD66 glass package contains no brominated flame retardants or chlorine-based materials, meeting IPC-4101D requirements for green PCB assembly.
1N4744A,133 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Cut Tape (CT)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 14 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 11.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4744A,133 FAQ
1.How can I place an order for 1N4744A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4744A,133 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 1N4744A,133 reliable?
The price and inventory of 1N4744A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4744A,133 is usually 5 days.
3.What payment methods are accepted for 1N4744A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4744A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4744A,133?
1N4744A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4744A,133 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 1N4744A,133?
For technical support, including 1N4744A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4744A,133 requirements.
6.How does Aetrix verify that 1N4744A,133 is sourced from the original manufacturer or authorized distributors?
All 1N4744A,133 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 1N4744A,133 meets industry standards.
7.What is the process for return or replacement of 1N4744A,133?
All 1N4744A,133 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4744A,133, 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 1N4744A,133 part is unused and in its original packaging.
Return procedure for 1N4744A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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