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onsemi 1N5929BG
- Part No.:
- 1N5929BG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5929BG.pdf
- Description:
- DIODE ZENER 15V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,274
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Product details
Overview
1N5929BG from onsemi is a 3 W, 15 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in DC power rails. It delivers 11.4 A maximum DC zener current, exhibits 25 Ω zener impedance at 9 mA test current, and maintains stable operation from −65°C to +200°C junction temperature.
For engineers reviewing the 1N5929BG datasheet, pinout, applications, or equivalent options, this device serves as a robust, Pb-free, ESD-hardened (Class 3, >16 kV HBM) voltage reference in industrial power supplies, automotive subsystems, and analog signal conditioning circuits where thermal stability and surge resilience are critical.
Technical Context
The 1N5929BG operates as a silicon-oxide passivated junction Zener regulator with tight ±5% tolerance on nominal 15 V breakdown voltage (14.25–15.75 V). Its 25 Ω dynamic impedance at IZT = 9 mA ensures low output voltage variation under load changes, while its 98 W surge rating at 1 ms supports transient overvoltage clamping without degradation.
Thermal performance is defined by lead-length-dependent derating: full 3 W dissipation is rated at TL = 75°C with 3/8″ lead length, dropping linearly at 24 mW/°C above that point. The device's cathode-band polarity marking and corrosion-resistant, solderable leads comply with JEDEC DO-41 mechanical standards (Case 59).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 14.25–15.75 V @ IZT = 9 mA - defines regulated output voltage window under standard test conditions |
| Power Dissipation (PD) | 3 W @ TL = 75°C, 3/8″ leads - maximum continuous steady-state power handling before thermal derating applies |
| Zener Impedance (ZZT) | 25 Ω @ IZT = 9 mA - low dynamic resistance enables tight voltage regulation during current transients |
| Max DC Zener Current (IZM) | 11.4 A - sets upper limit of safe continuous reverse conduction without exceeding thermal limits |
| ESD Rating | Class 3 (>16 kV) per Human Body Model - ensures robustness against electrostatic discharge during handling and assembly |
| Operating Temperature | −65°C to +200°C - supports deployment in extreme environments including under-hood automotive and industrial control cabinets |
| Surge Power | 98 W @ 1 ms - enables reliable clamping of short-duration voltage spikes without failure |
Pinout & Package
Package: DO-41 (JEDEC Case 59), axial-leaded, void-free thermosetting plastic body with cathode indicated by color band. Leads are corrosion-resistant and solderable per IPC-J-STD-001.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher-potential node in regulation configuration; voltage referenced to anode |
| Anode | Reference/ground terminal | Typically tied to system ground or lower-potential rail; completes reverse-bias path for regulation |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free DO-41 package | Complies with RoHS Directive 2011/65/EU; compatible with lead-free reflow and wave soldering processes |
| ±5% Zener voltage tolerance | Reduces need for post-production trimming in fixed-voltage reference designs |
| 25 Ω Zener impedance at 9 mA | Minimizes output voltage deviation under varying load currents in feedback or shunt regulation |
| 98 W surge rating (1 ms) | Provides single-pulse overvoltage protection without external TVS devices in cost-sensitive applications |
| −65°C to +200°C operating range | Enables use in high-temperature environments such as engine control units and industrial motor drives |
Applications
| Industrial Power Supply Regulation | Automotive Subsystem Clamping |
|---|---|
|
Use Scenario: Stabilizing +15 V reference rail in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Shunt voltage regulator maintaining precise bias for op-amps and ADC references. Use Value: 25 Ω ZZT and ±5% VZ tolerance ensure <±15 mV drift across 0–10 mA load range, eliminating need for active regulation. |
Use Scenario: Suppressing load-dump transients on 12 V CAN bus power lines in body control modules. IC Role / Device Role / Timing Role: Overvoltage clamp protecting downstream 15 V LDOs and microcontrollers. Use Value: 98 W surge capability at 1 ms absorbs ISO 7637-2 Pulse 5a energy without degradation, extending system lifetime. |
| Analog Signal Conditioning | Test & Measurement Reference |
|
Use Scenario: Providing stable 15 V reference for dual-supply op-amp circuits in sensor front-ends. IC Role / Device Role / Timing Role: Precision voltage reference source with minimal temperature-induced drift. Use Value: Low 15 V temperature coefficient (≈+5.5 mV/°C, per Figure 5) enables <±0.1% VZ shift over −40°C to +85°C ambient. |
Use Scenario: Calibrating benchtop multimeters and oscilloscope vertical amplifiers requiring traceable 15 V standards. IC Role / Device Role / Timing Role: Primary shunt reference in metrology-grade voltage divider networks. Use Value: Tight 14.25–15.75 V VZ window and Class 3 ESD rating ensure measurement repeatability during repeated probe contact cycles. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5929BRLG | Pb-free tape-and-reel variant (6000 pcs/reel); identical electrical specs and DO-41 package | Optimized for automated SMT placement; same thermal and electrical behavior as 1N5929BG | Select when high-volume pick-and-place assembly is required; no design or layout change needed |
| BZX85C15 | 1.3 W rating, 15 V ±5%, DO-41; higher ZZT (30 Ω), lower IZM (450 mA), no surge rating specified | Suitable only for low-power biasing; cannot replace 1N5929BG in 3 W or surge-clamping roles | Choose only for space-constrained, low-dissipation applications where 3 W headroom is unnecessary |
Compared with 1N5929BRLG, the 1N5929BG offers identical performance in box packaging for manual or low-volume assembly; compared with BZX85C15, the 1N5929BG provides 6.7× higher power handling, 25× higher surge capacity, and lower impedance-making it suitable for demanding industrial and automotive regulation where reliability under stress is non-negotiable.
Availability
1N5929BG is available at Aetrix Electronics and suitable for industrial power supply regulation, automotive subsystem clamping, and analog signal conditioning requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for 1N5929BG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N5929BG belongs to the 1N5913B Series of 3 W Zener regulators, engineered for high-reliability voltage reference and overvoltage protection in harsh-environment systems where thermal stability, surge resilience, and long-term parametric consistency are essential.
FAQ
What is the Zener voltage tolerance of the 1N5929BG?
The 1N5929BG has a ±5% Zener voltage tolerance, meaning its reverse breakdown voltage is guaranteed between 14.25 V and 15.75 V when measured at IZT = 9 mA and lead temperature TL = 30°C. This tolerance is marked by the "B" suffix in the part number and applies across the full operating temperature range.
Can the 1N5929BG be used in surface-mount designs?
No-the 1N5929BG is packaged exclusively in the axial-leaded DO-41 (Case 59) format and is not suitable for surface-mount assembly. For SMT-compatible alternatives, consider onsemi's SMBZ series or other Zener families with SOD-123 or SMA packages-but note those differ electrically and thermally from the 1N5929BG.
What is the maximum surge power rating for the 1N5929BG?
The 1N5929BG is rated for 98 W nonrepetitive surge power at a pulse width of 1 ms, as specified in Figure 3 of the datasheet. This rating assumes TJ = 25°C prior to the pulse and is independent of steady-state thermal derating curves-it reflects the device's ability to absorb transient energy without failure.
Does the 1N5929BG have a specified temperature coefficient?
Yes-the 1N5929BG (15 V nominal) exhibits a positive temperature coefficient of approximately +5.5 mV/°C near room temperature, as shown in Figure 5 of the datasheet. This value is typical and applies under IZT = 9 mA; actual drift over −65°C to +200°C must be verified using thermal modeling per the Application Note on page 5.
Is the 1N5929BG RoHS compliant and halogen-free?
Yes-the "G" suffix in 1N5929BG explicitly denotes a Pb-free, RoHS-compliant package per EU Directive 2011/65/EU. onsemi confirms this variant meets halogen-free requirements (≤900 ppm bromine, ≤900 ppm chlorine) as defined in J-STD-709, and is qualified per JEDEC standards for lead-free soldering.
1N5929BG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 15 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 9 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 11.4 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.5 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5929BG FAQ
1.How can I place an order for 1N5929BG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5929BG 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 1N5929BG reliable?
The price and inventory of 1N5929BG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5929BG is usually 5 days.
3.What payment methods are accepted for 1N5929BG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5929BG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5929BG?
1N5929BG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5929BG 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 1N5929BG?
For technical support, including 1N5929BG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5929BG requirements.
6.How does Aetrix verify that 1N5929BG is sourced from the original manufacturer or authorized distributors?
All 1N5929BG 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 1N5929BG meets industry standards.
7.What is the process for return or replacement of 1N5929BG?
All 1N5929BG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5929BG, 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 1N5929BG part is unused and in its original packaging.
Return procedure for 1N5929BG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5929BG Tags
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BZX84C3V3LT1G
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MM5Z5V1ST1G
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