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Nexperia USA Inc. 1N4729A,113
- Part No.:
- 1N4729A,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4729A,113.pdf
- Description:
- DIODE ZENER 3.6V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:9,734
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Product details
Overview
1N4729A,113 from Nexperia is a 3.6 V ±5 % Zener voltage regulator diode in a hermetically sealed SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 69 mA test current, used for low-voltage stabilization in linear power supplies and reference circuits.
For engineers reviewing the 1N4729A,113 datasheet, 1N4729A,113 pinout, 1N4729A,113 application, or 1N4729A,113 equivalent, this page delivers verified electrical parameters, axial lead polarity mapping, thermal resistance (110 K/W), reverse leakage limits (≤100 µA at 1 V), and real-world use cases in analog voltage references and overvoltage clamping.
Technical Context
This Zener diode operates in reverse breakdown to maintain a stable 3.6 V reference across load variations, with differential resistance of 10 Ω at 69 mA test current and guaranteed regulation within ±5 % tolerance at 25 °C ambient. Its 1000 mW power rating enables use in medium-current shunt regulation without external heat sinking under standard lead conditions.
Designed for DC voltage stabilization, it exhibits ≤100 µA reverse current at 1 V and supports non-repetitive peak reverse currents up to 1260 mA. Junction temperature range spans −65 °C to +200 °C, ensuring reliability in industrial and automotive environments where thermal cycling occurs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 3.6 V nominal, ±5 % tolerance - ensures precise low-voltage reference in analog circuits |
| Test Current (Itest) | 69 mA - defines operating point for specified VZ and dynamic impedance |
| Differential Resistance (rdif) | 10 Ω at Itest - determines output impedance and load regulation sensitivity |
| Reverse Current (IR) | ≤100 µA at 1 V - guarantees low leakage in standby or high-impedance bias networks |
| Total Power Dissipation (Ptot) | 1000 mW at Tamb = 50 °C - sets maximum continuous shunt power before thermal derating |
| Forward Voltage (VF) | ≤1.2 V at 200 mA - defines conduction loss when used in forward-biased protection paths |
| Thermal Resistance (Rth(j-t)) | 110 K/W - quantifies junction-to-lead thermal path for thermal design margining |
Pinout & Package
Hermetically sealed SOD66 (DO-41) axial glass package with 2 leads; cathode identified by a single black band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node in shunt configuration; reverse-biased during regulation |
| 2 (non-banded end) | Anode | Connected to ground or common reference; establishes polarity for proper Zener operation |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and long-term parameter drift in humid or harsh environments |
| ±5 % Zener voltage tolerance | Enables direct use in precision reference designs without post-calibration trimming |
| 1000 mW power rating | Supports shunt regulation up to ~278 mA at 3.6 V without forced cooling |
| Low differential resistance (10 Ω) | Minimizes output voltage variation under load current changes in feedback networks |
| −65 °C to +200 °C junction range | Validates operation in extended-temperature industrial and under-hood automotive applications |
Applications
| Linear Power Supply Reference | Analog Sensor Biasing |
|---|---|
Use Scenario: Stabilizing feedback voltage in discrete 5 V or 3.3 V linear regulators using pass transistors. IC Role / Device Role / Timing Role: Shunt voltage reference providing fixed 3.6 V reference for error amplifier input. Use Value: Maintains output regulation within ±2 % over line/load variations due to tight VZ tolerance and low rdif. |
Use Scenario: Supplying stable excitation voltage to resistive bridge sensors (e.g., strain gauges, RTDs). IC Role / Device Role / Timing Role: Precision DC bias source replacing higher-cost IC references where 3.6 V suffices. Use Value: Delivers <10 ppm/°C drift contribution and <100 µA leakage, preserving sensor signal integrity. |
| Overvoltage Clamp Protection | Microcontroller Reset Circuit |
Use Scenario: Clamping transient surges on 3.3 V I/O lines to prevent ESD damage to downstream logic. IC Role / Device Role / Timing Role: Fast-acting reverse-breakdown clamp activated above 3.6 V threshold. Use Value: Limits voltage excursion to ≤4.2 V during 1 kV HBM events while dissipating <100 mJ per pulse. |
Use Scenario: Generating clean, monotonic reset signal for MCUs during power-up and brownout conditions. IC Role / Device Role / Timing Role: Threshold detector that triggers reset when supply drops below 3.6 V × 0.9. Use Value: Provides predictable hysteresis-free reset assertion with <1 µs response to VCC sag. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4729A-T | Same electrical specs; tape-and-reel packaging (3000 pcs/reel) vs. bulk (113) | No functional difference; suited for automated SMT assembly instead of manual/hand-soldered prototyping | Select for production PCB assembly requiring pick-and-place compatibility |
| BZX55-C3V6 | 3.6 V ±5 %, but lower Ptot = 500 mW and higher rdif = 90 Ω | Not suitable for >139 mA shunt loads; requires tighter thermal management in same footprint | Choose only if board space constraints prohibit DO-41 axial leads and lower power suffices |
Compared with 1N4729A-T and BZX55-C3V6, the 1N4729A,113 offers full 1000 mW capability in bulk form for lab validation and low-volume builds, while maintaining identical regulation accuracy and thermal robustness - making it optimal for engineering verification prior to tape-and-reel transition.
Availability
1N4729A,113 is available at Aetrix Electronics and suitable for linear power supplies, analog sensor interfaces, overvoltage clamping, and microcontroller reset circuits requiring stable component supply with traceable sourcing and no minimum order quantity.
Supply support for 1N4729A,113 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 solutions with focus on efficiency, miniaturization, and sustainability.
The 1N47xxA series belongs to Nexperia's general-purpose Zener regulator portfolio, engineered specifically for cost-sensitive, high-reliability DC voltage stabilization in industrial power management and signal conditioning systems.
FAQ
What is the maximum continuous reverse current the 1N4729A,113 can handle without degradation?
The device is rated for a working current (IZ) of 252 mA at its 3.6 V Zener voltage, derived from Ptot = 1000 mW and VZ. Continuous operation above this level risks exceeding junction temperature limits unless heatsinking is applied. Absolute maximum non-repetitive peak reverse current is 1260 mA for short pulses.
How does the 1N4729A,113 differ from the 1N4728A in practical circuit design?
The 1N4728A has a 3.3 V Zener voltage versus 3.6 V for the 1N4729A, with corresponding test currents of 76 mA and 69 mA. This 0.3 V shift affects reference accuracy in feedback loops and may require resistor recalculations in shunt regulator topologies to maintain target output voltage.
Can the 1N4729A,113 be used in surface-mount designs?
No - it uses an axial-leaded SOD66 (DO-41) glass package incompatible with SMT reflow. For surface-mount equivalents, consider the BZX84-C3V6 (SOT-23, 3.6 V, 250 mW) or MMBZ5226B (SOT-23, 3.6 V, 350 mW), both requiring layout and thermal redesign due to lower power ratings.
Is the 1N4729A,113 suitable for automotive applications per AEC-Q200?
No - it is not AEC-Q200 qualified. While its −65 °C to +200 °C junction temperature range meets automotive thermal extremes, it lacks stress testing for vibration, humidity, and lifetime reliability required for automotive grade. Use AEC-Q200–qualified Zeners like the BZX84-A3V6 for such applications.
1N4729A,113 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 3.6 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 10 Ohms
- Current - Reverse Leakage @ Vr:
- 100 µA @ 1 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
1N4729A,113 FAQ
1.How can I place an order for 1N4729A,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4729A,113 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 1N4729A,113 reliable?
The price and inventory of 1N4729A,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4729A,113 is usually 5 days.
3.What payment methods are accepted for 1N4729A,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4729A,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4729A,113?
1N4729A,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4729A,113 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 1N4729A,113?
For technical support, including 1N4729A,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4729A,113 requirements.
6.How does Aetrix verify that 1N4729A,113 is sourced from the original manufacturer or authorized distributors?
All 1N4729A,113 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 1N4729A,113 meets industry standards.
7.What is the process for return or replacement of 1N4729A,113?
All 1N4729A,113 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4729A,113, 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 1N4729A,113 part is unused and in its original packaging.
Return procedure for 1N4729A,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4729A,113 Tags
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