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onsemi 1N5342B
- Part No.:
- 1N5342B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5342B.pdf
- Description:
- DIODE ZENER 6.8V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,344
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Product details
Overview
1N5342B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 6.8 V (±5%), maximum zener impedance of 175 Ω at 1 mA test current, and reverse leakage current of 5.2 µA at 5.5 V. It operates across −65 °C to +200 °C and delivers stable voltage regulation in power supply reference and overvoltage protection circuits.
For engineers reviewing the 1N5342B datasheet, pinout, applications, or equivalent options, this device serves as a precision DC voltage reference in low-power linear regulators, analog sensor biasing networks, and transient-suppression clamping stages where tight ±5% tolerance and 180 W surge capability are required.
Technical Context
The 1N5342B uses a silicon-oxide passivated junction for enhanced stability and ESD robustness (Class 3, >16 kV HBM). Its thermal design relies on axial lead conduction, with junction-to-lead thermal resistance of 25 °C/W at 3/8″ lead length and derating of 40 mW/°C above 25 °C.
It exhibits a positive temperature coefficient near 6.8 V (≈+2.5 mV/°C per Figure 2), enabling predictable drift compensation in temperature-sensitive references. Regulation is specified at two test currents (10% and 50% of IZM), ensuring consistent VZ performance under varying load conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 6.46–7.14 V (±5% tolerance at IZT = 1 mA); ensures precise DC reference within 0.34 V window for feedback loops. |
| Power Dissipation | 5 W steady-state @ TL = 25°C; supports continuous regulation in compact PCB layouts without active cooling. |
| Zener Impedance | 175 Ω max @ IZT = 1 mA; maintains low AC impedance for ripple rejection in low-noise analog supplies. |
| Surge Rating | 180 W @ 8.3 ms pulse; clamps short-duration transients without failure in industrial power inputs. |
| Reverse Leakage | 5.2 µA max @ VR = 5.5 V; minimizes quiescent current loss in battery-backed or energy-harvesting systems. |
| Operating Temp | −65 °C to +200 °C; qualified for under-hood automotive, downhole, and high-reliability industrial environments. |
| ESD Rating | Class 3 (>16 kV HBM); withstands handling and board-level ESD events without parameter shift or failure. |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter; leads 25.4–31.75 mm long.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground | Connected to circuit common or lower-potential node; establishes reference polarity for clamping or regulation. |
| Cathode | Zener breakdown terminal / regulated output node | Provides stable 6.8 V output when reverse-biased; must be connected to higher-potential rail than anode. |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables stable long-term VZ drift (<1% typical over 1000 hrs) and reduced parameter shift after thermal cycling. |
| ±5% zener voltage tolerance | Reduces need for post-assembly trimming in production; supports direct replacement in legacy 1N53xx designs. |
| 180 W non-repetitive surge rating | Handles IEC 61000-4-5 Level 3 surges without derating or external series impedance in 24 V DC systems. |
| Pb-free (RoHS-compliant) package | Meets global environmental compliance requirements without sacrificing solderability or thermal performance. |
| Void-free thermosetting plastic case | Prevents moisture ingress and delamination during reflow or high-humidity operation up to 85% RH. |
Applications
| Industrial Power Supply Reference | Automotive Sensor Biasing |
|---|---|
Use Scenario: Providing stable 6.8 V reference for op-amp comparators and ADC voltage dividers in programmable logic controllers. IC Role / Device Role / Timing Role: Zener diode functions as shunt voltage regulator, maintaining constant bias point despite input ripple and load variation. Use Value: Enables <10 mV reference drift over −40 °C to +85 °C ambient, meeting IEC 61131-2 immunity requirements. |
Use Scenario: Biasing NTC thermistors and Hall-effect sensors in engine control units exposed to under-hood temperatures. IC Role / Device Role / Timing Role: Supplies regulated excitation voltage to analog front-end sensors while rejecting battery voltage fluctuations. Use Value: Delivers stable 6.8 V at 1 mA with <5 µA leakage, minimizing self-heating error in precision temperature measurement. |
| Overvoltage Clamp Protection | Low-Power Standby Regulator |
Use Scenario: Clamping 12 V rail transients in telecom power distribution boards during hot-swap insertion events. IC Role / Device Role / Timing Role: Acts as fast-acting shunt protector, diverting surge current away from downstream LDOs and microcontrollers. Use Value: Withstands 180 W/8.3 ms pulses without degradation, eliminating need for TVS diodes in cost-sensitive designs. |
Use Scenario: Generating 6.8 V standby supply for real-time clock and memory retention circuits in consumer electronics. IC Role / Device Role / Timing Role: Provides ultra-low-quiescent-current regulation (<5.2 µA leakage) during deep sleep modes. Use Value: Extends battery life by limiting standby current to sub-microamp levels while maintaining accurate timekeeping voltage. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4734A (onsemi) | Same 6.8 V nominal, but 1 W rating, 10 Ω ZT, and −65 °C to +175 °C range; no 180 W surge rating. | Targeted at low-power signal conditioning, not industrial power rails requiring high-energy transient suppression. | Select 1N5342B when >5 W dissipation, >180 W surge, or >175 °C operation is required; choose 1N4734A for space-constrained signal-path references. |
| BZX85C6V8 (Nexperia) | 6.8 V ±5%, 1.3 W rating, 10 Ω ZT, TO-204AA package; lacks Class 3 ESD rating and 200 °C storage rating. | Designed for general-purpose PCB-level regulation, not high-reliability automotive or downhole deployments. | Use BZX85C6V8 only in benign environments with <1 W average dissipation; 1N5342B remains preferred for ruggedized, high-stability applications. |
Compared with 1N4734A and BZX85C6V8, the 1N5342B offers 5× higher power handling, 180 W surge capacity, and extended temperature range-making it uniquely suitable for industrial and automotive power regulation where reliability under stress is non-negotiable.
Availability
1N5342B is available at Aetrix Electronics and suitable for industrial power supply reference, automotive sensor biasing, and overvoltage clamp protection requiring stable component supply across extended temperature and surge conditions.
Supply support for 1N5342B 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 supplier specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N53 Series was designed as a high-reliability, 5 W Zener family for demanding DC voltage regulation and transient suppression in harsh-environment electronics, emphasizing thermal robustness and parametric consistency.
FAQ
What is the zener voltage tolerance of the 1N5342B?
The 1N5342B has a ±5% zener voltage tolerance, with a nominal value of 6.8 V and guaranteed range of 6.46 V to 7.14 V at 1 mA test current (IZT). This tolerance is defined per JEDEC standards and applies specifically to the "B" suffix variant documented in the onsemi 1N53 Series datasheet Rev. 19.
Can the 1N5342B be used in surface-mount designs?
No, the 1N5342B is exclusively an axial-lead through-hole device in Case 017AA plastic package. It is not available in SMD variants such as DO-213AB or SOD-123. For surface-mount alternatives, engineers should evaluate the BZX84-C6V8 or MMBZ5235B, though neither matches the 5 W rating or 180 W surge capability of the 1N5342B.
What is the maximum allowable junction temperature for continuous operation of the 1N5342B?
The 1N5342B supports continuous operation up to +150 °C junction temperature under DC conditions. While its storage range extends to +200 °C, the datasheet explicitly limits steady-state DC operation to 150 °C to ensure long-term reliability and parameter stability.
How does the 1N5342B handle surge events, and what test standard applies?
The 1N5342B is rated for up to 180 W non-repetitive surge power at 8.3 ms pulse width, per IEC 61000-4-5 surge waveform modeling. This rating is validated using square-wave testing at TA = 25 °C and reflects actual clamping behavior in industrial power line protection applications.
Is the 1N5342B RoHS-compliant and lead-free?
Yes, the 1N5342B is offered in a Pb-free (RoHS-compliant) package, indicated by the "G" suffix in ordering codes (e.g., 1N5342BG). The device meets JEDEC J-STD-609 Category 1a marking requirements and supports standard SnPb and lead-free reflow profiles without compromising solder joint integrity.
1N5342B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 6.8 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 10 µA @ 5.2 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5342B FAQ
1.How can I place an order for 1N5342B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5342B 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 1N5342B reliable?
The price and inventory of 1N5342B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5342B is usually 5 days.
3.What payment methods are accepted for 1N5342B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5342B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5342B?
1N5342B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5342B 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 1N5342B?
For technical support, including 1N5342B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5342B requirements.
6.How does Aetrix verify that 1N5342B is sourced from the original manufacturer or authorized distributors?
All 1N5342B 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 1N5342B meets industry standards.
7.What is the process for return or replacement of 1N5342B?
All 1N5342B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5342B, 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 1N5342B part is unused and in its original packaging.
Return procedure for 1N5342B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5342B Tags
-
MMBZ5240B-7-F
Diodes Incorporated
-
BZT52C5V6T-7
Diodes Incorporated
-
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
-
BZT52C3V6LP-7
Diodes Incorporated
-
SMAZ12-13-F
Diodes Incorporated
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