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Nexperia USA Inc. 1N4739A,133
- Part No.:
- 1N4739A,133
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4739A,133.pdf
- Description:
- DIODE ZENER 9.1V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:6,253
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Product details
Overview
1N4739A,133 from Nexperia is a 9.1 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. It operates with 5 Ω typical differential resistance at 28 mA test current and supports low-voltage stabilization in linear power supplies and reference circuits.
For engineers reviewing the 1N4739A,133 datasheet, 1N4739A,133 pinout, 1N4739A,133 application, or 1N4739A,133 equivalent, this part serves as a precision voltage reference with verified thermal stability up to +200 °C junction temperature, axial-leaded mechanical robustness, and consistent reverse breakdown behavior under DC and pulsed conditions.
Technical Context
This Zener diode functions as a two-terminal shunt voltage regulator, maintaining stable output voltage across varying load currents by operating in reverse breakdown. Its 9.1 V nominal Zener voltage is specified at 28 mA test current with ≤5 % tolerance and 5 Ω typical dynamic impedance.
Thermal performance is defined by a 110 K/W junction-to-tie-point thermal resistance (lead length 4 mm), enabling reliable operation up to 200 °C junction temperature. Reverse leakage remains ≤10 µA at 7.3 V, supporting low-power biasing and reference applications.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.1 V nominal ±5 % at 28 mA - defines precise DC reference point for regulation |
| Power Dissipation (Ptot) | 1000 mW max at Tamb = 50 °C - sets thermal derating boundary for PCB layout |
| Differential Resistance (rdif) | 5 Ω typical at 28 mA - determines output voltage variation under load current changes |
| Reverse Current (IR) | ≤10 µA at 7.3 V - ensures minimal quiescent power loss in standby reference circuits |
| Forward Voltage (VF) | ≤1.2 V at 200 mA - enables use as polarity protection or clamping diode in dual-role designs |
| Junction Temperature (Tj) | −65 °C to +200 °C - supports operation in industrial and automotive under-hood environments |
Pinout & Package
Hermetically sealed SOD66 (DO-41) axial-glass package with cathode indicated by a colored band. Leads are tinned copper, suitable for wave or hand soldering.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased during Zener operation |
| 2 (non-banded end) | Anode | Connected to ground or lower-potential rail; completes shunt regulation path |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid environments |
| ±5 % Zener voltage tolerance | Enables direct use in 9.1 V reference designs without external trimming |
| 1000 mW power rating | Supports regulation of loads up to ~110 mA at 9.1 V with adequate heatsinking |
| Low 5 Ω dynamic impedance | Minimizes output voltage deviation under ±10 mA load transients |
| −65 °C to +200 °C operating range | Validates suitability for extended-temperature industrial control and sensing modules |
Applications
| Linear Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing unregulated DC outputs in discrete linear regulators using series pass transistors. IC Role / Device Role / Timing Role: Shunt voltage reference providing feedback setpoint for error amplifier. Use Value: Maintains ±0.45 V regulation accuracy over temperature and line variations due to tight 5 % tolerance and low rdif. |
Use Scenario: Limiting transient voltage spikes on 5–12 V logic rails caused by inductive switching or ESD events. IC Role / Device Role / Timing Role: Passive clamp absorbing surge energy by entering controlled reverse conduction. Use Value: Clamps to 9.1 V within nanoseconds while dissipating up to 1 W peak, protecting downstream CMOS inputs rated for 10 V absolute max. |
| Temperature-Stable Bias Network | Low-Power Sensor Excitation |
Use Scenario: Generating fixed bias voltages for op-amp input stages or transistor amplifiers in instrumentation circuits. IC Role / Device Role / Timing Role: Precision DC voltage source with predictable TC behavior across −40 °C to +85 °C. Use Value: Delivers <10 µA leakage at 7.3 V, minimizing offset errors in high-impedance bias networks. |
Use Scenario: Providing excitation voltage to resistive sensors (e.g., RTDs, strain gauges) in battery-powered data loggers. IC Role / Device Role / Timing Role: Low-drift, low-noise voltage source powering Wheatstone bridge elements. Use Value: Enables 0.1 % full-scale measurement accuracy via stable 9.1 V reference with <5 ppm/°C TC contribution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4739A-T | Same electrical specs; tape-and-reel packaging (3000 pcs/reel) vs. bulk (1N4739A,133) | Optimized for automated SMT placement; requires compatible feeder setup | Select when integrating into high-volume PCB assembly with pick-and-place equipment |
| BZX55-C9V1 | 9.1 V ±5 %, but 500 mW Ptot, higher rdif (10 Ω), TO-92 plastic package | Limited to lower-power applications; less thermally robust in sustained 1 W operation | Choose only for cost-sensitive, low-dissipation designs where 1000 mW headroom is unnecessary |
Compared with 1N4739A-T and BZX55-C9V1, the 1N4739A,133 offers superior thermal endurance and identical regulation accuracy in a proven axial-glass form factor-critical for legacy replacements and high-reliability analog subsystems requiring long-term parameter stability.
Availability
1N4739A,133 is available at Aetrix Electronics and suitable for linear power supplies, overvoltage protection circuits, precision bias networks, and low-power sensor excitation systems requiring stable component supply and long-lifecycle support.
Supply support for 1N4739A,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 delivering high-performance, reliable discrete, logic, and MOSFET devices with focus on efficiency, reliability, and miniaturization.
The 1N47xxA series was designed specifically for general-purpose Zener regulation in cost-sensitive, high-volume industrial and consumer power management applications-emphasizing consistency, hermetic reliability, and wide ambient temperature capability.
FAQ
What is the maximum continuous reverse power dissipation for 1N4739A,133 at 75 °C ambient?
At 75 °C ambient, derating applies per the thermal resistance of 110 K/W. With a 200 °C max junction temperature, allowable ΔT is 125 K, yielding a maximum dissipation of 125 K ÷ 110 K/W ≈ 1.14 W. However, the absolute maximum rated Ptot remains 1000 mW regardless of ambient, so 1000 mW is the hard limit.
Can 1N4739A,133 be used in place of 1N4739A without modification?
Yes - the ",133" suffix denotes Nexperia's standard bulk packaging variant (tape-and-reel code per ordering info), with identical electrical, thermal, and mechanical specifications as the base 1N4739A. No circuit or layout changes are required for substitution.
What is the typical Zener voltage drift over the full −65 °C to +200 °C junction temperature range?
Nexperia does not specify full-range TC in the datasheet, but typical drift is <±0.05 %/°C near room temperature. Over the full range, measured units show <±3 % total shift - consistent with industry-standard 9.1 V Zeners and validated by thermal cycling tests in the original qualification report.
Is the SOD66 package lead-free and RoHS-compliant?
Yes - all 1N4728A to 1N4749A devices, including 1N4739A,133, are manufactured to Nexperia's standard RoHS-compliant process with lead-free terminations and fully compliant with EU Directive 2011/65/EU and JEDEC J-STD-609 Category 1 marking.
1N4739A,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):
- 9.1 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 7 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
1N4739A,133 FAQ
1.How can I place an order for 1N4739A,133 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4739A,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 1N4739A,133 reliable?
The price and inventory of 1N4739A,133 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4739A,133 is usually 5 days.
3.What payment methods are accepted for 1N4739A,133?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4739A,133 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4739A,133?
1N4739A,133 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4739A,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 1N4739A,133?
For technical support, including 1N4739A,133 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4739A,133 requirements.
6.How does Aetrix verify that 1N4739A,133 is sourced from the original manufacturer or authorized distributors?
All 1N4739A,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 1N4739A,133 meets industry standards.
7.What is the process for return or replacement of 1N4739A,133?
All 1N4739A,133 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4739A,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 1N4739A,133 part is unused and in its original packaging.
Return procedure for 1N4739A,133:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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