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onsemi 1N5357BG
- Part No.:
- 1N5357BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5357BG.pdf
- Description:
- DIODE ZENER 20V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:714
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Product details
Overview
1N5357BG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 20 V, ±5% tolerance, 65 Ω maximum zener impedance at 3 mA test current, and 0.5 mA maximum leakage current at 15.2 V reverse voltage. 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 1N5357BG datasheet, pinout, applications, or equivalent options, key selection criteria include its 20 V nominal regulation voltage, 5 W steady-state power rating, 180 W surge capability at 8.3 ms, ESD robustness (>16 kV HBM), and Pb-free Surmetic 40 plastic package compatibility with automated through-hole assembly.
Technical Context
The 1N5357BG uses a silicon-oxide passivated junction to achieve tight voltage tolerance and stable regulation across temperature. Its zener voltage is specified at IZT = 3 mA with 65 Ω dynamic impedance, and it maintains regulation down to IZK = 1 mA where impedance rises to 75 Ω.
Thermal performance is defined by a junction-to-lead thermal resistance (θJL) of 25 °C/W at TL = 25°C with 3/8″ lead length, enabling reliable operation up to +150°C junction temperature under DC conditions. The device exhibits a positive temperature coefficient above 10 V, typical for 20 V Zeners.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 20 V - precise DC reference point for regulation or clamping at standard test current |
| Zener Tolerance | ±5% - ensures VZ remains within 19 V to 21 V under production conditions |
| Max Power Dissipation | 5 W @ TL = 25°C - supports continuous shunt regulation in low-to-medium current supplies |
| Zener Impedance | 65 Ω @ IZT = 3 mA - low dynamic resistance enables stable output under varying load currents |
| Leakage Current | 0.4 mA @ VR = 15.2 V - minimal off-state conduction preserves efficiency in standby modes |
| Surge Rating | 180 W @ 8.3 ms - withstands transient overvoltages without degradation in protection circuits |
| ESD Rating | Class 3 (>16 kV HBM) - robust handling during board assembly and system integration |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (JEDEC CASE 017AA), Pb-free, cathode indicated by band. Dimensions: 8.38–8.89 mm body 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 node | Connected to lower-potential side of regulated circuit; defines reference ground path in shunt configuration |
| Cathode | Zener breakdown terminal / Regulation output node | Connected to higher-potential rail; delivers stable 20 V reference when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| Surmetic 40 packaging | Void-free, transfer-molded thermosetting plastic providing environmental sealing and mechanical ruggedness for industrial environments |
| 6-parameter guaranteed limits | VZ, ZZT, ZZK, IZK, IR, and IZM all tested and binned - reduces need for post-production screening in critical designs |
| High surge robustness | 180 W non-repetitive surge rating at 8.3 ms - enables use in unfiltered input stages without external TVS |
| Pb-free compliance | G-suffix confirms RoHS-compliant termination and solderability at 260°C for 10 s - supports modern manufacturing requirements |
Applications
| DC Power Supply Regulation | Overvoltage Protection |
|---|---|
|
Use Scenario: Stabilizing output voltage in linear regulator feedback networks or low-power unregulated supplies. IC Role / Device Role / Timing Role: Shunt voltage reference element providing precise 20 V setpoint for error amplifiers or comparators. Use Value: Maintains ±5% regulation accuracy across temperature and line/load variations without active compensation circuitry. |
Use Scenario: Clamping transient spikes on 24 V industrial control bus lines exposed to inductive switching noise. IC Role / Device Role / Timing Role: Passive crowbar element that conducts above 21 V to divert surge energy to ground. Use Value: Absorbs up to 180 W for 8.3 ms without failure, protecting downstream 24 V logic and sensors. |
| Reference Voltage Source | Signal Level Translation |
|
Use Scenario: Generating stable bias points for op-amp comparators in battery-monitoring circuits. IC Role / Device Role / Timing Role: Precision 20 V reference node for analog-to-digital converter (ADC) reference scaling or threshold detection. Use Value: Delivers <0.4 mA leakage at 15.2 V, minimizing loading error on high-impedance reference dividers. |
Use Scenario: Level-shifting 3.3 V microcontroller GPIO signals to interface with 20 V sensor outputs. IC Role / Device Role / Timing Role: Bidirectional clamp limiting signal swing between 0 V and 20 V while blocking reverse current. Use Value: Leverages low forward voltage (VF ≤ 1.2 V @ 1 A) and sharp reverse breakdown to define clean logic thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5357B | Same electrical specs but SnPb lead finish; no Pb-free designation | Not compliant with RoHS or J-STD-020 reflow profiles requiring Pb-free terminations | Select 1N5357B only for legacy repair or non-RoHS-compliant systems where Pb content is permitted |
| MMBZ5242B | SOT-23 surface-mount package; 12 V nominal VZ; 0.5 W rating; 30 Ω ZT | Lower power, smaller footprint - suitable for space-constrained PCBs but not direct replacement for 5 W axial needs | Choose MMBZ5242B only for low-power signal-level referencing where board area and thermal mass are constrained |
Compared with 1N5357BG, the 1N5357B lacks Pb-free compliance and requires different soldering validation, while MMBZ5242B trades power handling and package form factor for miniaturization - neither offers drop-in replacement capability due to differing package, power rating, or voltage grade.
Availability
1N5357BG is available at Aetrix Electronics and suitable for industrial power supplies, automotive body electronics, and test equipment requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5357BG 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, sensing, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N53 series belongs to onsemi's discrete Zener regulator portfolio, engineered for high-reliability shunt regulation in harsh environments - emphasizing tight tolerance, surge resilience, and Pb-free manufacturability.
FAQ
What is the nominal zener voltage and tolerance of the 1N5357BG?
The 1N5357BG has a nominal zener voltage of 20 V with a guaranteed tolerance of ±5%, meaning its actual zener voltage falls between 19 V and 21 V when measured at IZT = 3 mA and TA = 25°C. This specification is validated per JEDEC standards and applies to every unit shipped, supporting predictable design margins in voltage-reference and clamping circuits.
Can the 1N5357BG be used in surface-mount designs?
No, the 1N5357BG is an axial-lead through-hole device in Surmetic 40 plastic package (CASE 017AA) and is not compatible with SMT assembly. For surface-mount alternatives, engineers should consider devices like the MMBZ52xx series - but note these differ in power rating, voltage grade, and thermal behavior. The 1N5357BG requires wave or hand soldering with 260°C max lead temperature for 10 seconds.
What is the maximum steady-state power dissipation for the 1N5357BG?
The 1N5357BG is rated for 5 W maximum steady-state power dissipation at TL = 25°C with 3/8″ lead length. Derating is required above 25°C at 40 mW/°C, reducing usable power to approximately 3.5 W at TL = 62.5°C. This rating assumes proper heatsinking via leads and accounts for junction-to-lead thermal resistance of 25 °C/W.
How does the 1N5357BG perform under surge conditions?
The 1N5357BG is rated for up to 180 W non-repetitive surge power at 8.3 ms pulse width, verified per industry-standard square-wave testing. This enables reliable operation in applications subject to load dump, inductive kickback, or lightning-induced transients - provided the surge duty cycle remains low and average power stays within the 5 W DC limit.
Is the 1N5357BG RoHS-compliant and lead-free?
Yes, the 'G' suffix in 1N5357BG explicitly denotes a Pb-free package per onsemi's compliance documentation. The device meets RoHS Directive 2011/65/EU and is compatible with lead-free soldering processes, including peak temperatures up to 260°C for 10 seconds at 1/16″ from the case. Full material declarations and test reports are available through onsemi's compliance portal.
1N5357BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 20 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 3 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 15.2 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
1N5357BG FAQ
1.How can I place an order for 1N5357BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5357BG 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 1N5357BG reliable?
The price and inventory of 1N5357BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5357BG is usually 5 days.
3.What payment methods are accepted for 1N5357BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5357BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5357BG?
1N5357BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5357BG 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 1N5357BG?
For technical support, including 1N5357BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5357BG requirements.
6.How does Aetrix verify that 1N5357BG is sourced from the original manufacturer or authorized distributors?
All 1N5357BG 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 1N5357BG meets industry standards.
7.What is the process for return or replacement of 1N5357BG?
All 1N5357BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5357BG, 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 1N5357BG part is unused and in its original packaging.
Return procedure for 1N5357BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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