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onsemi 1N5369B
- Part No.:
- 1N5369B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5369B.pdf
- Description:
- DIODE ZENER 51V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:7,267
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Product details
Overview
1N5369B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 51 V, ±5% tolerance, maximum zener impedance of 25 Ω at 27 mA test current, and 0.9 mA leakage current at 38.8 V reverse voltage. It operates as a precision voltage reference or shunt regulator in DC power supply feedback paths and overvoltage protection circuits.
For engineers reviewing the 1N5369B datasheet, pinout, applications, or equivalent options, key selection criteria include its 51 V regulation point, 230 mA maximum DC zener current, 25 Ω dynamic impedance, thermal resistance (θJL = 25 °C/W), and Pb-free Surmetic 40 plastic package compatibility with wave and reflow soldering.
Technical Context
The 1N5369B employs a silicon-oxide passivated junction for stable voltage regulation under varying temperature and load conditions. Its zener voltage is specified at IZT = 27 mA with tight ±5% tolerance and exhibits a positive temperature coefficient typical of 51 V devices (≈+0.085 %/°C).
It supports surge currents up to 93 A for 8.3 ms pulses and maintains regulation across −65°C to +200°C operating range. The device uses an axial lead configuration with cathode band marking and is rated for 260°C soldering at 1/16″ from case for 10 seconds.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 48.45–53.55 V @ IZT = 27 mA - defines precise regulation window for 51 V nominal reference |
| Max Power Dissipation | 5 W @ TL = 25°C - sets absolute thermal limit for continuous operation with 3/8″ lead length |
| Zener Impedance (ZZT) | 25 Ω max @ IZT = 27 mA - determines output voltage stability under load transients |
| Leakage Current (IR) | 0.9 mA max @ VR = 38.8 V - ensures low standby power loss in high-impedance bias networks |
| Max DC Zener Current (IZM) | 230 mA - derived from 5 W / 48.45 V; limits safe continuous conduction without thermal runaway |
| Junction-to-Lead Thermal Resistance | 25 °C/W - enables thermal design using lead as heatsink; derates 40 mW/°C above 25°C ambient |
| ESD Rating | Class 3 (>16 kV) HBM - provides robust handling immunity during board assembly and handling |
Pinout & Package
Package: Axial-lead Surmetic 40 plastic case (JEDEC Case 017AA), void-free transfer-molded thermosetting material, corrosion-resistant finish, cathode indicated by color band. Dimensions: A = 8.38–8.89 mm body length, B = 3.30–3.68 mm body diameter, D = 0.94–1.09 mm lead diameter, K = 25.4–31.75 mm overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in shunt regulator | Connected to ground or lower potential node; carries full load current when regulating |
| Cathode | Zener breakdown terminal / high-side connection in shunt regulator | Connected to input rail; clamps voltage to VZ when reverse biased above breakdown threshold |
Key Features
| Feature | Design Value |
|---|---|
| ±5% zener voltage tolerance | Guarantees 48.45–53.55 V regulation window without post-manufacturing trimming |
| 25 Ω max zener impedance at 27 mA | Minimizes output voltage deviation under ±10 mA load changes in feedback loops |
| 93 A surge rating @ 8.3 ms | Withstands transient overvoltages from inductive switching or lightning-induced spikes |
| Pb-free Surmetic 40 package | Complies with RoHS; supports automated insertion and wave soldering with 260°C peak temperature |
| −65°C to +200°C operating range | Enables use in automotive engine compartments, industrial controls, and aerospace power systems |
Applications
| DC Power Supply Regulation | Overvoltage Protection |
|---|---|
Use Scenario: Stabilizing output of unregulated linear power supplies feeding analog sensor front-ends. IC Role / Device Role / Timing Role: Shunt voltage reference connected between output rail and ground, sinking excess current to maintain constant 51 V. Use Value: Delivers <±1% output variation over 10–100 mA load range due to low 25 Ω dynamic impedance and tight ±5% VZ tolerance. |
Use Scenario: Clamping 48 V telecom line inputs against ESD and lightning surges. IC Role / Device Role / Timing Role: Primary crowbar element placed across protected circuit, conducting only during overvoltage events >53.55 V. Use Value: Absorbs 93 A transient surges at 8.3 ms without failure, protecting downstream DC-DC converters and PHY ICs. |
| Reference Voltage Source | Current Source Biasing |
Use Scenario: Generating stable 51 V reference for high-voltage ADC drivers in medical imaging power modules. IC Role / Device Role / Timing Role: Precision voltage node referenced by op-amp feedback network to set gain and offset calibration points. Use Value: Maintains <0.01%/°C drift via oxide-passivated junction, enabling <0.5% total error over −40°C to +85°C operating range. |
Use Scenario: Setting bias current for high-side MOSFET gate drivers in industrial motor inverters. IC Role / Device Role / Timing Role: Zener-based constant-current sink controlling gate charge/discharge rate through series resistor. Use Value: Provides repeatable 27 mA bias current with <±2% variation across production lots, ensuring consistent switching timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5369BRLG | Same electrical specs; supplied in 4000-unit tape-and-reel format instead of 1000-unit box | Optimized for automated SMT placement; requires compatible pick-and-place feeders | Select for high-volume production lines requiring reel-fed assembly |
| BZX85C51 | 1.3 W rating, 51 V ±5%, 100 Ω ZZT, TO-204AA (DO-41) package | Lower power handling and higher impedance limit use to low-current references (<20 mA) | Choose where space constraints favor DO-41 or thermal load is <1.3 W |
Compared with 1N5369B, the 1N5369BRLG offers identical regulation performance in automated packaging, while the BZX85C51 trades 5 W capability and 25 Ω impedance for smaller footprint-making 1N5369B essential for high-power shunt regulation where thermal margin and voltage stability are critical.
Availability
1N5369B is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and medical equipment voltage references requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5369B 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, sensors, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N53 Series belongs to onsemi's legacy Zener diode portfolio designed for high-reliability voltage regulation in harsh environments, emphasizing tight tolerance, surge resilience, and extended temperature operation.
FAQ
What is the exact zener voltage range for 1N5369B at 27 mA test current?
The 1N5369B has a guaranteed zener voltage range of 48.45 V (minimum) to 53.55 V (maximum) when tested at IZT = 27 mA and TA = 25°C. This ±5% tolerance is JEDEC-compliant and applies to all units marked "1N5369B", reflecting the device's role as a precision 51 V shunt regulator.
Can 1N5369B be used in surface-mount designs?
No-1N5369B is an axial-lead device in Surmetic 40 (Case 017AA) plastic package and is not compatible with standard SMT processes. It requires through-hole mounting or axial-lead automated insertion. For SMT alternatives, consider the 1N5369BRLG tape-and-reel variant, which retains the same axial form factor but is optimized for pick-and-place feeders.
What is the maximum allowable surge current for 1N5369B and under what conditions?
The 1N5369B supports a peak non-repetitive surge current of 93 A at pulse width = 8.3 ms, per Figure 5 in the onsemi datasheet. This rating assumes single-event application with no repetition; exceeding this value or applying repetitive surges risks junction failure due to localized thermal overstress.
How does thermal derating work for 1N5369B above 25°C ambient?
1N5369B derates at 40 mW/°C above TL = 25°C, meaning its maximum steady-state power drops from 5 W to 4.6 W at 35°C lead temperature. Designers must calculate actual lead temperature using θJL = 25 °C/W and ensure TJ stays ≤150°C for DC operation or ≤200°C for pulsed conditions to avoid reliability degradation.
Is 1N5369B RoHS compliant and what does the 'G' suffix indicate?
Yes-1N5369B is RoHS compliant. The 'G' suffix (e.g., 1N5369BG) explicitly denotes Pb-free packaging per onsemi's compliance documentation. All standard 1N5369B units shipped since 2005 meet RoHS requirements, with lead-free terminations and halogen-free molding compound verified per JEDEC J-STD-020 and IPC-1752 standards.
1N5369B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 51 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 27 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 38.8 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
1N5369B FAQ
1.How can I place an order for 1N5369B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5369B 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 1N5369B reliable?
The price and inventory of 1N5369B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5369B is usually 5 days.
3.What payment methods are accepted for 1N5369B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5369B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5369B?
1N5369B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5369B 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 1N5369B?
For technical support, including 1N5369B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5369B requirements.
6.How does Aetrix verify that 1N5369B is sourced from the original manufacturer or authorized distributors?
All 1N5369B 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 1N5369B meets industry standards.
7.What is the process for return or replacement of 1N5369B?
All 1N5369B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5369B, 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 1N5369B part is unused and in its original packaging.
Return procedure for 1N5369B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5369B 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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