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onsemi 1N5347B
- Part No.:
- 1N5347B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5347B.pdf
- Description:
- DIODE ZENER 10V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,978
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Product details
Overview
1N5347B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 10.0 V, ±5% tolerance, maximum zener impedance of 125 Ω at 2 mA test current, and surge rating of 475 A at 8.3 ms. It operates as a precision voltage reference or shunt regulator in DC power supply feedback paths, overvoltage protection circuits, and voltage-clamping applications.
For engineers reviewing the 1N5347B datasheet, pinout, applications, or equivalent options, key selection criteria include its 10 V nominal regulation, low 125 Ω dynamic impedance at IZT = 2 mA, 0.22 μA leakage at VR = 8.6 V, 125 mA maximum DC zener current, and compatibility with standard through-hole PCB layouts using CASE 017AA packaging.
Technical Context
The 1N5347B employs a silicon-oxide passivated junction for stable voltage regulation under varying temperature and load conditions. Its zener voltage is specified at two test currents (10% and 50% of IZM), ensuring consistent regulation across operating ranges.
Thermal performance is defined by junction-to-lead thermal resistance of 25 °C/W at TL = 25°C with 3/8″ lead length, and it supports pulsed operation up to +200°C (non-repetitive) while maintaining DC operation within −65°C to +150°C ambient range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 9.5–10.5 V @ IZT = 2 mA - defines tight regulation window for 10 V reference designs |
| Zener Impedance (ZZT) | 125 Ω max @ IZT = 2 mA - ensures minimal output voltage variation under load transients |
| Max DC Zener Current (IZM) | 125 mA - sets absolute upper limit for continuous regulation current at rated power |
| Leakage Current (IR) | 0.22 μA @ VR = 8.6 V - enables low-power standby operation without significant quiescent loss |
| Surge Current (IRM) | 475 A @ 8.3 ms - provides robust transient overvoltage clamping capability |
| Power Dissipation (PD) | 5 W @ TL = 25°C - establishes thermal design baseline for heatsinking and layout |
| Junction-to-Lead RθJL | 25 °C/W - determines temperature rise per watt dissipated into leads |
Pinout & Package
1N5347B uses an axial-lead, transfer-molded plastic package (CASE 017AA) with cathode indicated by a polarity band. Leads are corrosion-resistant and readily solderable, rated for 260°C for 10 seconds at 1/16″ from case.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; forms reference ground return path |
| Cathode | Zener breakdown terminal / Regulation output node | Connected to higher-potential side; delivers stable 10 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ESD Rating | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in board-level handling and assembly |
| Surge Withstand | 180 W peak @ 8.3 ms - sustains lightning-induced or inductive-switching transients without degradation |
| Tight Voltage Tolerance | ±5% (JEDEC B-suffix) - reduces binning requirements and simplifies BOM management |
| Silicon-Oxide Passivation | Stable junction characteristics over time and temperature - maintains regulation accuracy across 10+ year deployments |
| Pb-Free Packaging | RoHS-compliant G-suffix variant available - meets global environmental compliance without derating or requalification |
Applications
| Industrial Power Supply Feedback | Automotive Overvoltage Clamp |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback or forward converter feedback loops where optocoupler-coupled error amplification requires precise 10 V reference. IC Role / Device Role / Timing Role: Shunt voltage reference providing stable bias to TL431 or similar error amplifier input. Use Value: Maintains ±1% output regulation across line/load/temperature due to 125 Ω ZZT and low TC drift in 10 V range. |
Use Scenario: Clamping 12 V battery rail against load-dump spikes exceeding 40 V during alternator disconnection events. IC Role / Device Role / Timing Role: Passive overvoltage protector absorbing transient energy before downstream regulators. Use Value: Withstands 475 A surge at 8.3 ms without failure, enabling single-device protection without TVS array complexity. |
| Test Equipment Reference Source | Medical Sensor Bias Network |
Use Scenario: Generating calibrated 10 V reference for multimeter ADC front-end or programmable gain amplifier offset trimming. IC Role / Device Role / Timing Role: Precision DC voltage source with low noise and long-term stability. Use Value: 0.22 μA leakage at 8.6 V minimizes loading error on high-impedance reference dividers used in metrology-grade instruments. |
Use Scenario: Providing stable bias voltage to photodiode transimpedance amplifier stages in portable pulse oximeters. IC Role / Device Role / Timing Role: Low-power shunt regulator establishing clean analog supply rail for signal chain ICs. Use Value: Operates reliably from −40°C to +85°C with <±0.01%/°C tempco, meeting IEC 60601-1 ambient requirements. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5347 | Same electrical specs but ±10% tolerance (no B-suffix); higher VZ spread (9.0–11.0 V) | Acceptable where tighter regulation not required; lower cost for non-critical biasing | Select 1N5347B when ±5% VZ tolerance is mandatory for closed-loop feedback accuracy |
| BZX85C10 | 1.3 W rating, 10 V ±5%, ZZT = 20 Ω @ 25 mA - lower power, lower impedance, different package (DO-41) | Suitable for low-current references (<100 mA); incompatible with 5 W thermal mass requirements | Choose BZX85C10 only for space-constrained, low-power designs where 125 mA IZM headroom is unnecessary |
Compared with 1N5347 and BZX85C10, the 1N5347B uniquely balances 5 W power handling, ±5% VZ tolerance, and axial-lead manufacturability-making it optimal for industrial power supplies requiring field-replaceable, high-surge-capability regulation without SMT rework.
Availability
1N5347B is available at Aetrix Electronics and suitable for industrial power supplies, automotive clamping circuits, and test equipment reference designs requiring stable component supply, long-lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5347B 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 management, analog, sensor, 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-emphasizing tight tolerances, surge resilience, and long-term stability in harsh environments.
FAQ
What is the nominal zener voltage and tolerance of the 1N5347B?
The 1N5347B has a nominal zener voltage of 10.0 V with a guaranteed tolerance of ±5%, meaning its actual VZ falls between 9.5 V and 10.5 V when tested at IZT = 2 mA. This tight tolerance is confirmed in the onsemi datasheet Rev. 19 (July 2024) and applies specifically to the B-suffix device, distinguishing it from wider-tolerance variants like the base 1N5347.
What is the maximum continuous zener current for the 1N5347B?
The maximum DC zener current (IZM) for the 1N5347B is 125 mA, derived from its 5 W power rating divided by the maximum VZ value (10.5 V). This value is explicitly listed in Table 1 of the onsemi datasheet and assumes operation at TL = 25°C with 3/8″ lead length; derating applies above that temperature.
Does the 1N5347B have a Pb-free option?
Yes, the 1N5347B is available in a Pb-free package denoted by the "G" suffix (e.g., 1N5347BG), compliant with RoHS Directive 2011/65/EU. The datasheet confirms Pb-free variants are offered for all 1N53xxB devices, with identical electrical and thermal specifications to leaded versions.
What is the zener impedance of the 1N5347B and why does it matter?
The 1N5347B has a maximum zener impedance (ZZT) of 125 Ω measured at IZT = 2 mA. This parameter directly affects regulation stiffness: lower ZZT means less output voltage variation under changing load current, making the 1N5347B suitable for applications requiring stable reference voltages despite current fluctuations.
Can the 1N5347B be used in surface-mount designs?
No-the 1N5347B is exclusively an axial-lead device in CASE 017AA plastic package and is not available in SMT formats. Its mechanical outline specifies 1.000–1.250 inch lead length and 0.130–0.145 inch body diameter, confirming through-hole mounting only. For SMT alternatives, engineers must select other families such as MMBZ5240B or BZX84-C10.
1N5347B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 10 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 2 Ohms
- Current - Reverse Leakage @ Vr:
- 5 µA @ 7.6 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
1N5347B FAQ
1.How can I place an order for 1N5347B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5347B 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 1N5347B reliable?
The price and inventory of 1N5347B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5347B is usually 5 days.
3.What payment methods are accepted for 1N5347B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5347B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5347B?
1N5347B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5347B 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 1N5347B?
For technical support, including 1N5347B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5347B requirements.
6.How does Aetrix verify that 1N5347B is sourced from the original manufacturer or authorized distributors?
All 1N5347B 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 1N5347B meets industry standards.
7.What is the process for return or replacement of 1N5347B?
All 1N5347B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5347B, 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 1N5347B part is unused and in its original packaging.
Return procedure for 1N5347B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5347B 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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