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onsemi 1N4734A-T50R
- Part No.:
- 1N4734A-T50R
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N4734A-T50R.pdf
- Description:
- DIODE ZENER 5.6V 1W DO41
- Quantity:
- Payment:
- Shipping:
Inventory:8,936
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Product details
Overview
1N4734A-T50R from onsemi is a 5.6 V, ±5% tolerance Zener diode in DO-41 glass package, rated for 1.0 W power dissipation at TL ≤ 50°C with 6.67 mW/°C derating above 50°C, operating from –65°C to +200°C, and used for precision voltage regulation in low-power analog reference and overvoltage protection circuits.
For engineers reviewing the 1N4734A-T50R datasheet, pinout, applications, or equivalent options, key selection criteria include nominal Zener voltage (5.6 V), test current (45 mA), dynamic impedance (45 Ω @ IZ), leakage current (10 μA @ VR = 4.5 V), and non-repetitive peak reverse current (810 mA).
Technical Context
The 1N4734A-T50R operates as a silicon planar Zener diode with sharp reverse breakdown characteristics, designed for stable voltage reference under DC bias conditions. Its Zener voltage is specified at 45 mA test current with typical dynamic impedance of 45 Ω and knee impedance of 5 Ω at 1 mA.
It exhibits low temperature coefficient near zero crossing (~0.06 %/°C at 5.6 V), supports surge handling up to 810 mA (non-repetitive, 8.3 ms square wave), and maintains leakage current ≤10 μA at 4.5 V reverse bias - enabling reliable operation in unregulated supply rails and feedback networks.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 5.6 V nominal, ±5% tolerance - defines precise clamping/reference level in regulator or protection circuits |
| Test Current (IZ) | 45 mA - standard bias point where VZ and dynamic impedance are guaranteed |
| Zener Impedance (ZZ) | 45 Ω @ IZ - determines output voltage stability under load variation |
| Power Dissipation (PD) | 1.0 W @ TL ≤ 50°C - sets maximum continuous DC power handling with defined lead temperature |
| Leakage Current (IR) | ≤10 μA @ VR = 4.5 V - ensures minimal error current in high-impedance reference paths |
| Operating Temp Range | –65°C to +200°C - supports deployment in automotive under-hood, industrial control, and aerospace environments |
Pinout & Package
DO-41 glass axial package with cathode indicated by a single color band; two-terminal device with no internal connections beyond anode and cathode.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Reference ground node | Connected to circuit common or lower potential side in reverse-biased Zener configuration |
| Cathode | Zener breakdown terminal / Regulated output node | Connected to input rail or regulated node; color band identifies this terminal for correct orientation |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Enables tight regulation without post-assembly trimming in cost-sensitive designs |
| 1.0 W power rating with thermal derating | Supports robust operation in ambient temperatures up to +150°C when mounted per spec (3/8″ lead length) |
| Low leakage (≤10 μA @ 4.5 V) | Minimizes error in high-gain op-amp references and battery-powered sensor biasing |
| Non-repetitive peak reverse current: 810 mA | Provides transient overvoltage immunity during ESD or inductive switching events |
Applications
| Industrial Power Supply Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Stable 5.6 V reference for linear regulators and ADC voltage references in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode provides fixed reference voltage for feedback loop compensation and analog signal conditioning. Use Value: Tight 5.6 V ±5% tolerance and low 45 Ω dynamic impedance ensure <±10 mV drift across load and temperature in 24 V industrial supplies. | Use Scenario: Biasing thermistor-based coolant temperature sensors in engine control units. IC Role / Device Role / Timing Role: Zener diode establishes stable excitation voltage for ratiometric sensor measurement. Use Value: Leakage ≤10 μA prevents loading error in high-impedance sensor bridges; –65°C to +200°C range matches under-hood thermal requirements. |
| Overvoltage Protection Clamp | Low-Power Voltage Monitor |
Use Scenario: Clamping transient spikes on 5 V microcontroller I/O lines exposed to relay coil back-EMF. IC Role / Device Role / Timing Role: Zener diode acts as shunt protector, diverting excess energy to ground during overvoltage events. Use Value: 810 mA non-repetitive peak reverse current handles typical 8.3 ms inductive surges without degradation. | Use Scenario: Simple brown-out detection in battery-powered IoT nodes using comparator threshold set by 5.6 V reference. IC Role / Device Role / Timing Role: Zener diode supplies accurate threshold voltage to comparator input. Use Value: Low 10 μA leakage avoids premature discharge of backup capacitors; DO-41 package enables through-hole reliability in field-deployed units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A-TP (Micro Commercial Co) | Same 5.6 V nominal, ±5% tolerance, DO-41 package, but rated for 1.0 W at TL = 75°C (derates at 8.33 mW/°C) | Higher thermal limit allows marginally higher ambient operation in compact layouts | Select when board-level thermal management exceeds 50°C lead temperature but cannot accommodate heatsinking |
| BZX55-C5V6 (Vishay) | Same 5.6 V, ±5%, DO-35 package; 500 mW rating, 60 Ω ZZ @ 45 mA, 100 nA leakage @ 4.5 V | Lower power rating and smaller DO-35 footprint suit space-constrained PCBs with lower power budgets | Select for miniaturized consumer electronics where 500 mW suffices and DO-41 mechanical robustness is not required |
Compared with 1N4734A-T50R, the 1N4734A-TP offers extended thermal headroom at higher lead temperatures, while BZX55-C5V6 trades power and ruggedness for size and ultra-low leakage - making each suitable for distinct layout, thermal, and reliability constraints.
Availability
1N4734A-T50R is available at Aetrix Electronics and suitable for industrial power supply reference, automotive sensor biasing, and overvoltage protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N4734A-T50R 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
onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N47xxA series is part of onsemi's legacy Zener diode portfolio, engineered for high-reliability voltage regulation and transient suppression in harsh-environment applications demanding wide temperature range and stable parametric performance.
FAQ
What is the Zener voltage tolerance of the 1N4734A-T50R?
The 1N4734A-T50R has a Zener voltage tolerance of ±5% around its nominal 5.6 V rating. This means the actual measured VZ falls between 5.32 V and 5.88 V at 45 mA test current and 25°C ambient. This tolerance is guaranteed per the onsemi datasheet Rev. 8 and applies to all units shipped as 1N4734A-T50R.
Does the 1N4734A-T50R have a specified temperature coefficient?
Yes, the 1N4734A-T50R exhibits a low and well-characterized temperature coefficient near zero crossing - approximately +0.06 %/°C at 5.6 V. This value is derived from the typical VZ drift curve in the onsemi 1N4728A–1N4758A datasheet and makes the 1N4734A-T50R especially suitable for stable reference applications where minimal thermal drift is critical.
What is the maximum non-repetitive peak reverse current for the 1N4734A-T50R?
The 1N4734A-T50R supports a non-repetitive peak reverse current (IZSM) of 810 mA under 8.3 ms square-wave surge conditions, as specified in the onsemi datasheet. This rating reflects short-duration transient energy absorption capability and is not intended for repetitive duty cycles - repeated surges require derating or external limiting.
Can the 1N4734A-T50R be used in surface-mount designs?
No, the 1N4734A-T50R is packaged in the axial DO-41 glass case and is intended for through-hole mounting only. It does not have a surface-mount variant. For SMT-compatible alternatives with similar electrical specs, consider the MMBZ5232B (SOT-23, 5.6 V, ±5%) or BZX84-C5V6 (SOT-23), both requiring separate validation for thermal and surge performance.
How does the 1N4734A-T50R compare to the 1N4733A in terms of Zener voltage and impedance?
The 1N4734A-T50R has a nominal Zener voltage of 5.6 V (min 5.32 V, max 5.88 V), whereas the 1N4733A is rated at 5.1 V (min 4.845 V, max 5.355 V). At their respective test currents (45 mA for 1N4734A-T50R, 49 mA for 1N4733A), the 1N4734A-T50R shows 45 Ω dynamic impedance versus 49 Ω for the 1N4733A - indicating slightly better regulation stability at 5.6 V.
1N4734A-T50R Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 5.6 V
- Tolerance:
- ±5%
- Power - Max:
- 1 W
- Impedance (Max) (Zzt):
- 5 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 2 V
- Voltage - Forward (Vf) (Max) @ If:
- -
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-41
1N4734A-T50R FAQ
1.How can I place an order for 1N4734A-T50R through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N4734A-T50R 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 1N4734A-T50R reliable?
The price and inventory of 1N4734A-T50R are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N4734A-T50R is usually 5 days.
3.What payment methods are accepted for 1N4734A-T50R?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N4734A-T50R transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N4734A-T50R?
1N4734A-T50R orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N4734A-T50R 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 1N4734A-T50R?
For technical support, including 1N4734A-T50R datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N4734A-T50R requirements.
6.How does Aetrix verify that 1N4734A-T50R is sourced from the original manufacturer or authorized distributors?
All 1N4734A-T50R 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 1N4734A-T50R meets industry standards.
7.What is the process for return or replacement of 1N4734A-T50R?
All 1N4734A-T50R units undergo pre-shipment inspection (PSI). If there is an issue with 1N4734A-T50R, 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 1N4734A-T50R part is unused and in its original packaging.
Return procedure for 1N4734A-T50R:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N4734A-T50R Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
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MMSZ5231B-7-F
Diodes Incorporated
-
BZT52C15-7-F
Diodes Incorporated
-
BZX84C3V3LT1G
onsemi
-
MMSZ5245BS-7-F
Diodes Incorporated
-
MMSZ4682T1G
onsemi
-
BZT52C15S-7-F
Diodes Incorporated
-
MM5Z5V1ST1G
onsemi
-
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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