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onsemi 1N5340BG
- Part No.:
- 1N5340BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5340BG.pdf
- Description:
- DIODE ZENER 6V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:1,016
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Product details
Overview
1N5340BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 6.0 V, ±5% tolerance, 200 Ω maximum zener impedance at 1 mA test current, and 12.7 V maximum reverse leakage voltage. It operates across −65°C to +200°C and delivers stable voltage regulation in DC power supply feedback loops, overvoltage protection circuits, and reference voltage sources for analog comparators.
For engineers reviewing the 1N5340BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 6.0 V nominal zener voltage, 1 mA zener test current, 200 Ω dynamic impedance, and Pb-free Surmetic 40 plastic package with cathode band polarity marking.
Technical Context
This device uses a silicon-oxide passivated junction for enhanced stability and low leakage. Its zener voltage is specified at IZT = 1 mA with tight ±5% tolerance and exhibits a temperature coefficient typical of mid-range Zeners (≈+2 mV/°C near 6 V), as confirmed by Figure 2 in the datasheet.
The 1N5340BG supports surge currents up to 790 A for 8.3 ms pulses and maintains regulation under steady-state 5 W dissipation at TL = 25°C with 3/8″ lead length. Thermal resistance θJL is 25 °C/W, enabling predictable junction temperature estimation using TL = θLA·PD + TA and TJ = TL + θJL·PD.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 6.0 V - precise regulation point for low-voltage reference and clamp applications |
| Zener Tolerance | ±5% - ensures predictable voltage window (5.7–6.3 V) without binning |
| Zener Impedance | 200 Ω max @ IZT = 1 mA - defines regulation stiffness under small-signal load variations |
| Max DC Power Dissipation | 5 W @ TL = 25°C - sets absolute thermal limit for continuous operation |
| Surge Current Rating | 790 A @ 8.3 ms - enables robust transient overvoltage clamping in power rails |
| Junction-to-Lead Thermal Resistance | 25 °C/W - allows accurate junction temperature calculation from measured lead temperature |
| Operating Temperature Range | −65°C to +200°C - supports deployment in automotive under-hood, industrial, and aerospace environments |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (Case 017AA), void-free transfer-molded thermosetting material, cathode indicated by color band, RoHS-compliant Pb-free construction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode bias reference | Connected to lower-potential node in reverse-bias regulation configuration; must be held ≤ VZ below cathode to maintain regulation |
| Cathode | Zener breakdown terminal / regulation output node | Provides stable 6.0 V reference when reverse-biased; marked by visible band; connects to regulated rail or error amplifier input |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables <1 μA leakage at VR = 4.8 V and improves long-term parameter stability vs. non-passivated Zeners |
| ESD rating Class 3 (>16 kV HBM) | Permits direct handling and board assembly without special ESD controls in standard manufacturing lines |
| Surge rating up to 180 W @ 8.3 ms | Supports single-event transient suppression in 12 V automotive and industrial power inputs |
| Guaranteed limits on six electrical parameters | Ensures production consistency across VZ, ZZT, ZZK, IZK, IR, and IZM-critical for safety-critical references |
| Axial-lead mechanical robustness | Withstands 260°C soldering for 10 s at 1/16″ from case, enabling compatibility with standard wave and reflow processes |
Applications
| Automotive Body Control Module (BCM) Voltage Clamp | Industrial PLC Analog Input Reference |
|---|---|
Use Scenario: Clamps 12 V battery rail transients during load dump to protect microcontroller I/O pins. IC Role / Device Role / Timing Role: Zener diode operating in reverse breakdown to shunt excess energy above 6.0 V. Use Value: Limits peak voltage to ≤12.7 V (VR rating), preventing damage to 5 V logic interfaces downstream. | Use Scenario: Provides precision 6.0 V reference for 12-bit ADC in programmable logic controller analog input stage. IC Role / Device Role / Timing Role: Stable voltage reference source with low dynamic impedance (200 Ω) minimizing code spread under varying sensor loading. Use Value: Enables ±0.5 LSB accuracy in 0–5 V measurement range by holding reference drift <0.1% over −40°C to +85°C ambient. |
| DC-DC Converter Feedback Divider Stabilizer | Overvoltage Protection Circuit in PoE PD |
Use Scenario: Stabilizes optocoupler-based feedback loop in isolated 5 V/3 A flyback converter. IC Role / Device Role / Timing Role: Shunt regulator maintaining fixed voltage across upper feedback resistor to improve loop stability. Use Value: Reduces output voltage drift from ±3% to ±0.8% over line and load variation due to tight VZ tolerance and low ZZT. | Use Scenario: Triggers crowbar circuit when Powered Device (PD) input exceeds safe threshold during IEEE 802.3af/at startup. IC Role / Device Role / Timing Role: Zener element sensing input voltage and initiating SCR gate drive at 6.0 V threshold. Use Value: Responds within <100 ns to overvoltage events, limiting stress on PD interface IC before thermal shutdown activates. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5340B | Same electrical specs but SnPb lead finish; not Pb-free | Not suitable for RoHS-compliant designs requiring Pb-free assembly | Select 1N5340BG when compliance with EU RoHS Directive 2011/65/EU is mandatory |
| MMSZ5234B-TP | Surface-mount SOD-123 package; 6.2 V nominal; 100 Ω ZT; 500 mW rating | Limited to low-power, space-constrained PCBs; unsuitable for >0.5 W continuous dissipation | Choose MMSZ5234B-TP only for compact consumer electronics where 5 W capability is unnecessary |
Compared with 1N5340B, the 1N5340BG offers identical regulation performance with Pb-free compliance; versus MMSZ5234B-TP, it provides 10× higher power handling and axial-lead mechanical reliability but requires through-hole mounting and more board area.
Availability
1N5340BG is available at Aetrix Electronics and suitable for automotive body control modules, industrial PLC analog front-ends, and PoE-powered device overvoltage protection requiring stable component supply across extended temperature ranges and high-reliability qualification.
Supply support for 1N5340BG 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series belongs to onsemi's legacy Zener regulator portfolio, designed specifically for high-reliability, medium-power voltage reference and clamping in harsh-environment systems where axial-lead mechanical robustness and wide temperature operation are essential.
FAQ
What is the nominal zener voltage and tolerance of the 1N5340BG?
The 1N5340BG has a nominal zener voltage of 6.0 V with a guaranteed tolerance of ±5%, meaning its actual zener voltage falls between 5.7 V and 6.3 V when tested at IZT = 1 mA and TA = 25°C. This tolerance is defined per JEDEC standards and applies to all B-suffix devices in the 1N53 series, including the 1N5340BG.
Can the 1N5340BG be used in surface-mount designs?
No, the 1N5340BG is an axial-lead through-hole device housed in the Surmetic 40 plastic package (Case 017AA) and is not compatible with surface-mount assembly. For SMT alternatives, consider the MMSZ5234B-TP (SOD-123, 6.2 V), though it is rated for only 500 mW and lacks the 1N5340BG's 5 W capability and surge robustness.
What is the maximum allowable surge current for the 1N5340BG?
The 1N5340BG supports a maximum non-repetitive surge current of 790 A for an 8.3 ms square-wave pulse, as specified in the Electrical Characteristics table on page 2 of the onsemi datasheet. This rating assumes TL = 25°C and validates its use in transient voltage suppression applications such as automotive load dump protection.
How does the zener impedance of the 1N5340BG affect regulation accuracy?
The 1N5340BG has a maximum zener impedance (ZZT) of 200 Ω at IZT = 1 mA, which directly determines how much the output voltage varies with changes in zener current. A lower ZZT yields tighter regulation; this value ensures voltage deviation remains under ±120 mV for ±0.6 mA load current shifts, making the 1N5340BG suitable for precision reference roles in analog signal chains.
Is thermal derating required for the 1N5340BG above 25°C ambient?
Yes - the 1N5340BG must be derated at 40 mW/°C above TL = 25°C, as specified in the Maximum Ratings table. For example, at TL = 75°C, maximum allowable power drops to 3 W (5 W − 40 mW/°C × 50°C). Derating is based on lead temperature, not ambient, so proper heatsinking and lead length (≤3/8″) are critical to maintain safe junction temperature.
1N5340BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 6 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 1 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 3 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
1N5340BG FAQ
1.How can I place an order for 1N5340BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5340BG 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 1N5340BG reliable?
The price and inventory of 1N5340BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5340BG is usually 5 days.
3.What payment methods are accepted for 1N5340BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5340BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5340BG?
1N5340BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5340BG 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 1N5340BG?
For technical support, including 1N5340BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5340BG requirements.
6.How does Aetrix verify that 1N5340BG is sourced from the original manufacturer or authorized distributors?
All 1N5340BG 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 1N5340BG meets industry standards.
7.What is the process for return or replacement of 1N5340BG?
All 1N5340BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5340BG, 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 1N5340BG part is unused and in its original packaging.
Return procedure for 1N5340BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5340BG Tags
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