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Nexperia USA Inc. 1N4738A,113
- Part No.:
- 1N4738A,113
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4738A,113.pdf
- Description:
- DIODE ZENER 8.2V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:15,343
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Product details
Overview
1N4738A,113 from Nexperia is a hermetically sealed 8.2 V ±5 % Zener voltage regulator diode in SOD66 (DO-41) glass package, rated for 1000 mW total power dissipation and 6 mA working current at 8.2 V, used for low-voltage stabilization in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N4738A,113 datasheet, 1N4738A,113 pinout, 1N4738A,113 application, or 1N4738A,113 equivalent, key selection criteria include Zener voltage tolerance, thermal resistance (110 K/W), differential resistance (4.5 Ω), reverse leakage (≤10 µA at 6.6 V), and axial-leaded glass package suitability for through-hole PCB mounting and high-reliability analog references.
Technical Context
This Zener diode operates in reverse breakdown to maintain stable DC voltage under varying load and line conditions. It delivers precise regulation at 8.2 V with 5 % tolerance and exhibits low dynamic impedance (4.5 Ω) at 6 mA test current, enabling effective noise suppression in feedback paths.
Its hermetically sealed SOD66 glass package ensures long-term stability and moisture resistance, while junction-to-tie-point thermal resistance of 110 K/W supports reliable operation up to +200 °C junction temperature under controlled lead length and ambient conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 8.2 V nominal, ±5 % tolerance - defines regulated output voltage accuracy in reference circuits |
| Test Current (Itest) | 31 mA - standardized bias point for measuring VZ and dynamic impedance |
| Differential Resistance (rdif) | 4.5 Ω at Itest - determines regulation stiffness and load-induced voltage deviation |
| Reverse Current (IR) | ≤10 µA at 6.6 V - specifies leakage level below knee voltage, critical for low-power standby circuits |
| Total Power Dissipation (Ptot) | 1000 mW at Tamb = 50 °C - sets maximum continuous DC power handling before thermal derating |
| Junction Temperature (Tj) | −65 °C to +200 °C - enables operation in extended industrial and automotive under-hood environments |
Pinout & Package
SOD66 (DO-41) is a hermetically sealed axial-leaded glass package with 2 leads, cathode identified by a colored band. Lead length is specified at 4 mm for thermal characterization.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (banded end) | Cathode | Connected to regulated output node; reverse-biased terminal where Zener breakdown occurs |
| 2 (non-banded end) | Anode | Connected to circuit ground or lower potential; completes bias path for regulation current |
Key Features
| Feature | Design Value |
|---|---|
| Hermetic glass sealing | Prevents moisture ingress and parameter drift over time, ensuring long-term VZ stability in humid environments |
| ±5 % Zener voltage tolerance | Enables predictable regulation without post-manufacture trimming in cost-sensitive power reference designs |
| Low differential resistance (4.5 Ω) | Minimizes output voltage variation under ±10 mA load changes, supporting tight regulation in analog sensor supplies |
| 1000 mW power rating | Supports direct use in 5–12 V linear regulator shunt stages without external heat sinking at moderate ambient temperatures |
| −65 °C to +200 °C operating range | Validates suitability for under-dash automotive modules and industrial control cabinets with wide thermal cycling |
Applications
| Power Supply Reference | Overvoltage Clamp |
|---|---|
Use Scenario: Providing stable 8.2 V reference for op-amp comparators and ADC voltage references in industrial PLC analog input modules. IC Role / Device Role / Timing Role: Zener diode functions as two-terminal shunt voltage reference, establishing precision bias point independent of supply ripple. Use Value: Delivers 8.2 V ±5 % accuracy with <10 µA leakage at 6.6 V, minimizing error contribution to 12-bit measurement systems. |
Use Scenario: Clamping transient surges on 9 V battery-powered microcontroller I/O lines in portable medical devices. IC Role / Device Role / Timing Role: Acts as passive overvoltage protector, conducting above 8.2 V to divert energy away from sensitive CMOS inputs. Use Value: Withstands 550 mA non-repetitive peak reverse current and maintains regulation during 1/120 s surge events per IEC 61000-4-5. |
| Linear Regulator Shunt | Current Source Bias |
Use Scenario: Shunt element in discrete 8.2 V linear regulator for low-noise analog front-end power in audio preamplifiers. IC Role / Device Role / Timing Role: Zener diode sets output voltage while series pass transistor handles load current; dissipates excess power as heat. Use Value: 1000 mW rating allows ≥100 mA shunt current at full load, enabling stable regulation across 5–15 V input ranges. |
Use Scenario: Establishing constant bias current for JFET amplifier stages in RF receiver local oscillator buffers. IC Role / Device Role / Timing Role: Functions as voltage-controlled current source when paired with emitter/source resistor, leveraging stable VZ. Use Value: 4.5 Ω dynamic impedance ensures <0.5 % current variation over ±5 mA load shifts, preserving gain linearity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4738A-T | Same electrical specs; tape-and-reel packaging instead of bulk/ammopack; identical SOD66 footprint | Optimized for automated SMT placement despite axial-leaded form factor; requires compatible feeder setup | Select when high-volume PCB assembly demands reel-fed handling and traceable lot control |
| BZX85C8V2 | 8.2 V ±5 %, but in DO-35 glass package; higher differential resistance (10 Ω); 1300 mW Ptot | Less precise regulation under dynamic loads; larger package increases board area; higher power margin | Choose only if legacy DO-35 footprint compatibility is mandatory and tighter regulation is not required |
Compared with 1N4738A,113, the 1N4738A-T offers identical regulation performance with enhanced manufacturability, while BZX85C8V2 trades regulation precision for higher power headroom and legacy package fit-neither is pin-compatible due to differing axial lead spacing and body dimensions.
Availability
1N4738A,113 is available at Aetrix Electronics and suitable for industrial power reference, overvoltage protection, linear regulator shunt, and analog biasing applications requiring stable component supply and long-term parametric consistency.
Supply support for 1N4738A,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, reliability, and miniaturization.
The 1N47xxA series belongs to Nexperia's precision Zener diode product line, engineered specifically for stable voltage reference and clamping in cost-sensitive, high-volume industrial and consumer power management circuits.
FAQ
What is the maximum continuous reverse current the 1N4738A,113 can sustain at 8.2 V?
The device is rated for 6 mA working current (IZ) at its nominal Zener voltage of 8.2 V. Sustained operation beyond this value requires thermal verification against the 1000 mW power limit and junction temperature constraints; exceeding 6 mA continuously risks exceeding Ptot unless ambient and heatsinking conditions are strictly controlled.
Can the 1N4738A,113 be used in surface-mount designs?
No-it uses an axial-leaded SOD66 (DO-41) glass package designed exclusively for through-hole mounting. Its lead geometry and body shape are incompatible with standard SMT reflow profiles and pick-and-place tooling; alternative SMD Zeners like BZX384-B8V2 must be selected for surface-mount applications.
How does the 4.5 Ω differential resistance affect regulation accuracy under load variation?
At 6 mA test current, a 4.5 Ω rdif means a 1 mA change in Zener current produces ~4.5 mV output shift. For example, a ±2 mA load swing causes ±9 mV VZ deviation-acceptable for 8.2 V references needing ~0.1 % stability but insufficient for sub-0.05 % precision systems without additional buffering.
Is the 1N4738A,113 suitable for automotive under-hood applications?
Yes-the device is qualified for −65 °C to +200 °C junction temperature operation and features hermetic glass sealing, meeting baseline requirements for under-hood environments. However, system-level validation per AEC-Q200 is required, as Nexperia does not publish automotive-grade qualification data for this specific part number.
1N4738A,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):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 4.5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 6 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
1N4738A,113 FAQ
1.How can I place an order for 1N4738A,113 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4738A,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 1N4738A,113 reliable?
The price and inventory of 1N4738A,113 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4738A,113 is usually 5 days.
3.What payment methods are accepted for 1N4738A,113?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4738A,113 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4738A,113?
1N4738A,113 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4738A,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 1N4738A,113?
For technical support, including 1N4738A,113 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4738A,113 requirements.
6.How does Aetrix verify that 1N4738A,113 is sourced from the original manufacturer or authorized distributors?
All 1N4738A,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 1N4738A,113 meets industry standards.
7.What is the process for return or replacement of 1N4738A,113?
All 1N4738A,113 units undergo pre-shipment inspection (PSI). If there is an issue with 1N4738A,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 1N4738A,113 part is unused and in its original packaging.
Return procedure for 1N4738A,113:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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