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onsemi 1N5927B
- Part No.:
- 1N5927B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5927B.pdf
- Description:
- DIODE ZENER 12V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,203
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Product details
Overview
1N5927B from onsemi is a 3 W axial-lead Zener diode with nominal zener voltage of 12 V (±5%), maximum zener impedance of 31.2 Ω at 6.5 mA test current, and surge rating of 98 W for 1 ms. It operates from −65 °C to +200 °C and is used for precision voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation.
For engineers reviewing the 1N5927B datasheet, pinout, applications, or equivalent options, key selection criteria include its 12 V ±5% tolerance, 31.2 Ω dynamic impedance at IZT, 0.25 μA leakage at 9.1 V, 125 A maximum DC zener current, and DO-41 package compatibility with standard through-hole PCB layouts.
Technical Context
The 1N5927B implements a silicon-oxide passivated junction for stable reverse breakdown behavior and low leakage. Its thermal design relies on lead-to-ambient conduction, with derating starting at 75 °C for 3 W operation and at 50 °C for 1 W ambient-rated dissipation.
It delivers regulated voltage under steady-state DC bias and transient surge conditions up to 98 W (1 ms), with guaranteed limits on six electrical parameters including VZ, ZZT, IZK, ZZK, IR, and IZM - all tested at TL = 30 °C with 3/8″ lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 12 V nominal, 11.4–12.6 V range (±5% tolerance); defines stable regulation point under IZT = 6.5 mA |
| Zener Impedance (ZZT) | 31.2 Ω max at IZT = 6.5 mA; determines output voltage variation under load current changes |
| Max DC Zener Current (IZM) | 125 A; sets absolute upper limit for continuous reverse conduction without degradation |
| Leakage Current (IR) | 0.25 μA max at VR = 9.1 V; ensures minimal parasitic current in off-state standby operation |
| Surge Power Rating | 98 W for 1 ms non-repetitive pulse; supports transient overvoltage clamping in unprotected input stages |
| Steady-State Power Dissipation | 3 W at TL = 75 °C (3/8″ lead length); requires thermal management via lead conduction path |
| Operating Temperature Range | −65 °C to +200 °C; enables use in automotive engine compartments and industrial motor drives |
Pinout & Package
Package: DO-41 (Case 59-10), axial-lead, transfer-molded plastic housing with cathode polarity band. Lead diameter uncontrolled within 0.71–0.86 mm; overall body length 4.10–5.20 mm, diameter 2.00–2.70 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased terminal | Connected to higher potential node in regulation configuration; carries full zener current during conduction |
| Anode | Forward-biased terminal | Connected to lower potential node; provides return path for zener current and forward conduction path if needed |
Key Features
| Feature | Design Value |
|---|---|
| ESD robustness | Class 3 (>16 kV HBM); eliminates need for external ESD protection in board-level handling and assembly |
| Pb-free packaging | G-suffix indicates RoHS-compliant termination; supports lead-free reflow and wave soldering processes |
| Surge withstand | 98 W @ 1 ms; clamps fast transients (e.g., inductive kickback) without failure |
| Parameter guarantee | Six electrical parameters fully specified and production-tested; reduces validation effort in safety-critical designs |
| Package size | Same footprint as conventional 1 W Zeners; allows drop-in upgrade of existing 1 W designs to 3 W capability |
Applications
| Power Supply Feedback Regulation | Overvoltage Protection Clamp |
|---|---|
Use Scenario: Stabilizing output voltage in isolated flyback or forward converter feedback networks using optocoupler-coupled error amplifiers. IC Role / Device Role / Timing Role: Precision voltage reference element providing stable 12 V threshold for error amplifier bias and compensation. Use Value: Tight ±5% VZ tolerance and low 31.2 Ω ZZT ensure <1% output voltage drift across line/load/temperature variations. |
Use Scenario: Protecting downstream ICs from transient overvoltages on 12 V rail caused by relay switching or motor commutation. IC Role / Device Role / Timing Role: Fast-acting shunt clamp that conducts only above 12.6 V to divert surge energy to ground. Use Value: 98 W surge rating handles 1 ms spikes without degradation, while 0.25 μA leakage avoids loading sensitive analog circuits at nominal voltage. |
| Reference Voltage Source | Industrial Sensor Excitation |
Use Scenario: Generating stable excitation voltage for precision resistive bridge sensors (e.g., strain gauges, RTDs) in data acquisition modules. IC Role / Device Role / Timing Role: Low-noise, temperature-stable voltage reference replacing more complex IC references where cost and simplicity are critical. Use Value: Operating range to +200 °C enables direct mounting near high-temp sensors; oxide-passivated junction ensures long-term stability in harsh environments. |
Use Scenario: Providing regulated 12 V bias to 4–20 mA loop-powered transmitters in factory automation systems. IC Role / Device Role / Timing Role: Primary voltage regulator in two-wire transmitter front-end, maintaining constant sensor excitation despite varying loop voltage (12–36 V). Use Value: 3 W power rating supports sustained operation at full loop current (20 mA) with margin; DO-41 package allows easy manual replacement in field-serviceable enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N4742A | 12 V ±5%, 1 W rating, 22 Ω ZZT @ 21 mA, DO-41 package | Lower power handling (1 W vs. 3 W); suitable only for low-current reference or signal-level clamping | Select when thermal budget or cost constraints preclude 3 W devices and peak currents remain below 100 mA |
| BZX85C12 | 12 V ±5%, 1.3 W rating, 30 Ω ZZT @ 5 mA, DO-41 package | Higher leakage (5 μA @ 9.1 V vs. 0.25 μA), lower surge rating (40 W), same footprint | Choose for legacy BOM continuity where minor leakage increase is acceptable and surge demands are moderate |
Compared with 1N5927B, the 1N4742A offers tighter ZZT but lacks surge resilience and thermal headroom, while the BZX85C12 matches VZ tolerance and package but trades off leakage performance and transient robustness for broader distributor availability.
Availability
1N5927B is available at Aetrix Electronics and suitable for industrial power supplies, automotive body control modules, and factory automation sensors requiring stable component supply with full traceability and long-lifecycle support.
Supply support for 1N5927B 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 manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N5927B belongs to the 1N5913B Series of 3 W Zener regulators designed for high-reliability voltage reference and clamping in thermally demanding environments where oxide-passivated junction stability is essential.
FAQ
What is the zener voltage tolerance of the 1N5927B?
The 1N5927B has a zener voltage tolerance of ±5%, with a nominal value of 12 V and a guaranteed range of 11.4 V to 12.6 V when measured at IZT = 6.5 mA and lead temperature TL = 30 °C. This tolerance is indicated by the "B" suffix in the part number and applies across the full operating temperature range.
Can the 1N5927B be used in surface-mount designs?
No - the 1N5927B is packaged exclusively in the axial-lead DO-41 (Case 59-10) format and is not available in SMD variants. Its mechanical design requires through-hole mounting with 3/8″ lead length for rated 3 W operation. For SMT alternatives, consider the MMBZ5242B or BZX84-C12, though these differ in power rating and thermal behavior.
What is the maximum allowable reverse leakage current for the 1N5927B?
The 1N5927B specifies a maximum reverse leakage current (IR) of 0.25 μA at VR = 9.1 V and TL = 30 °C. This ultra-low leakage supports high-impedance reference and sensing applications where parasitic current must be minimized, such as in battery-powered instrumentation or precision analog front-ends.
How does the 1N5927B handle short-duration voltage surges?
The 1N5927B is rated for 98 W non-repetitive surge power at 1 ms pulse width, validated per Figure 3 of the onsemi datasheet. This capability enables reliable clamping of inductive transients and ESD events without parametric shift or catastrophic failure, provided the duty cycle remains low and average power stays within 3 W limits.
Is the 1N5927B RoHS compliant?
Yes - the "G" suffix in 1N5927B, G explicitly denotes a Pb-free, RoHS-compliant package per onsemi's manufacturing specifications. The device meets JEDEC standards for lead-free soldering, including compatibility with 260 °C peak reflow profiles for 10 seconds at 1/16″ from the case.
1N5927B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 12 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 6.5 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 9.1 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
1N5927B FAQ
1.How can I place an order for 1N5927B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5927B 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 1N5927B reliable?
The price and inventory of 1N5927B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5927B is usually 5 days.
3.What payment methods are accepted for 1N5927B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5927B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5927B?
1N5927B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5927B 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 1N5927B?
For technical support, including 1N5927B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5927B requirements.
6.How does Aetrix verify that 1N5927B is sourced from the original manufacturer or authorized distributors?
All 1N5927B 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 1N5927B meets industry standards.
7.What is the process for return or replacement of 1N5927B?
All 1N5927B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5927B, 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 1N5927B part is unused and in its original packaging.
Return procedure for 1N5927B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5927B 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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