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onsemi 1N5934B
- Part No.:
- 1N5934B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5934B.pdf
- Description:
- DIODE ZENER 24V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,542
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Product details
Overview
1N5934B from onsemi is a 3 W, 24 V ±5% Zener diode in DO-41 axial package, designed for precision voltage regulation and overvoltage protection in DC power rails, reference supplies, and surge-clamping circuits. It delivers 18.2 mA maximum Zener current (IZM), 15.6 Ω dynamic impedance at 19 mA test current (ZZT), and maintains stable regulation across −65°C to +200°C junction temperature range.
For engineers reviewing the 1N5934B datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, cathode/anode polarity mapping, real-world use cases in industrial power supplies and analog signal conditioning, and validated alternative parts with documented differences in Zener voltage tolerance and surge capability.
Technical Context
The 1N5934B operates as a silicon-oxide passivated junction Zener regulator, optimized for steady-state DC clamping and low-noise voltage reference generation. Its 24 V nominal Zener voltage is guaranteed at TL = 30°C with ±5% tolerance (B-suffix), and it exhibits 0.25 μA max reverse leakage at VR = 18.2 V.
Thermal performance is defined by lead-length–dependent derating: full 3 W dissipation is rated only at TL = 75°C with 3/8″ lead length, dropping to 1 W at TA = 50°C. Surge capability is specified at 98 W for 1 ms nonrepetitive pulses, independent of DC thermal limits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 22.8 V min / 24 V nom / 25.2 V max at IZT = 19 mA - defines regulated output voltage window under standard test conditions |
| Zener Impedance (ZZT) | 15.6 Ω max at IZT = 19 mA - determines regulation accuracy under load transients |
| Max DC Zener Current (IZM) | 62 mA - sets absolute upper limit for continuous conduction without degradation |
| Reverse Leakage (IR) | 0.25 μA max at VR = 18.2 V - ensures minimal standby power loss in high-impedance bias networks |
| Surge Power Rating | 98 W @ 1 ms - enables transient overvoltage suppression without device failure |
| Operating Temperature | −65°C to +200°C - supports deployment in automotive engine compartments and industrial motor drives |
| ESD Rating | Class 3 (>16 kV HBM) - provides robust handling during manual assembly and board-level testing |
Pinout & Package
Package: DO-41 axial-leaded plastic case (Case 59-10), void-free thermosetting material, cathode indicated by black 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) | Zener breakdown terminal | Connected to higher-potential node in reverse-bias regulation; carries full Zener current during clamping |
| Anode | Reference/return terminal | Connected to circuit ground or lower-potential rail; completes current path during Zener conduction |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free DO-41 package | RoHS-compliant construction with solderable leads rated for 260°C, 10 s at 1/16″ from case |
| 6-parameter guaranteed limits | VZ, IZT, ZZT, IZK, ZZK, and IR all tested and binned per datasheet table |
| Surge-rated junction | Withstands 98 W single-pulse surges without parametric shift or catastrophic failure |
| Stable ±5% tolerance | B-suffix guarantees tight VZ distribution ideal for cost-sensitive reference designs requiring no trimming |
| High-temperature operation | Rated up to +200°C junction temperature-enables use in under-hood automotive and high-power LED drivers |
Applications
| Industrial Power Supply Regulation | Analog Signal Clamping |
|---|---|
Use Scenario: Stabilizing 24 V DC bus in programmable logic controller (PLC) backplane power distribution. IC Role / Device Role / Timing Role: Zener diode acts as shunt regulator, sinking excess current to maintain constant 24 V output when input varies between 26–32 V. Use Value: Provides ±5% regulation accuracy without active feedback, reducing BOM count and layout complexity versus IC-based solutions. |
Use Scenario: Protecting ADC input pins from ESD-induced overvoltage in sensor interface circuits. IC Role / Device Role / Timing Role: 1N5934B clamps transient spikes above 25.2 V while presenting <0.25 μA leakage below 18.2 V. Use Value: Prevents ADC saturation and latch-up with sub-microamp standby current, preserving signal integrity in battery-powered nodes. |
| Automotive Engine Control Unit (ECU) | LED Driver Reference |
Use Scenario: Providing stable 24 V reference for fuel injector driver biasing in diesel ECU modules. IC Role / Device Role / Timing Role: Functions as temperature-stable voltage reference under wide ambient swings (−40°C to +150°C under hood). Use Value: Maintains regulation accuracy across full operating range due to silicon-oxide passivation and −65°C to +200°C TJ rating. |
Use Scenario: Setting precise current threshold in constant-current LED driver feedback loop. IC Role / Device Role / Timing Role: Supplies fixed 24 V reference to op-amp comparator controlling MOSFET gate drive. Use Value: Enables ±5% LED brightness consistency across production units without calibration, leveraging tight VZ binning. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5934A | ±10% Zener voltage tolerance (vs. ±5% for 1N5934B) | Lower-cost option where tighter regulation not required | Select 1N5934A only if system tolerances allow ±10% VZ drift across temperature and life |
| MMBZ5242B | SOT-23 surface-mount package; same 24 V nominal but 0.5 W rating and 22 Ω ZZT | Used in space-constrained PCBs where axial DO-41 footprint is prohibitive | Choose MMBZ5242B only when board area is critical and power dissipation remains ≤0.5 W |
Compared with 1N5934A, the 1N5934B offers tighter voltage control essential for precision references; compared with MMBZ5242B, it delivers triple the power handling and superior surge immunity, making it suitable for industrial-grade 3 W clamping where reliability outweighs miniaturization.
Availability
1N5934B is available at Aetrix Electronics and suitable for industrial power supplies, automotive ECU modules, analog signal conditioning circuits, and LED driver reference designs requiring stable component supply and long-term lifecycle support.
Supply support for 1N5934B 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 is a global semiconductor manufacturer specializing in energy-efficient power, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N5934B 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 and surge resilience are critical.
FAQ
What is the Zener voltage tolerance of the 1N5934B?
The 1N5934B has a guaranteed ±5% Zener voltage tolerance, confirmed by the "B" suffix in its part number per onsemi's tolerance designation standard. At 24 V nominal, this means the actual measured VZ falls between 22.8 V and 25.2 V when tested at TL = 30°C with IZT = 19 mA. This tight tolerance eliminates need for post-production trimming in most reference applications.
Can the 1N5934B be used in surface-mount designs?
No-the 1N5934B is exclusively packaged in the axial-leaded DO-41 (Case 59-10) format and is not available in SMT variants. For surface-mount equivalents, consider the MMBZ5242B (SOT-23, 24 V, 0.5 W) or BZX84-C24 (SOT-23, 24 V, 300 mW), though both require derating for power and surge capability relative to the 1N5934B.
What is the maximum allowable power dissipation for the 1N5934B at 100°C ambient?
At TA = 100°C, the 1N5934B must be derated from its 1 W rating at TA = 50°C using the 6.67 mW/°C slope. This yields PD = 1 W − (100 − 50) × 0.00667 W/°C = 0.6665 W. Operation above this level risks exceeding TJ = +200°C and permanent degradation, even with adequate heatsinking.
How does the 1N5934B handle repetitive voltage transients?
The 1N5934B is rated for 98 W nonrepetitive surges at 1 ms pulse width, but repetitive transients require strict adherence to Figure 3's duty-cycle–limited curves. For example, at 10% duty cycle and 1 ms pulse width, peak surge power must be reduced to ~20 W to avoid cumulative thermal stress and junction damage.
Is the 1N5934B RoHS compliant?
Yes-the "G" suffix in the ordering code (1N5934B, G) explicitly denotes Pb-free packaging per onsemi's RoHS compliance program. The device uses lead-free solderable terminations and conforms to JEDEC standards for environmentally responsible manufacturing.
1N5934B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 24 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 19 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 18.2 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
1N5934B FAQ
1.How can I place an order for 1N5934B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5934B 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 1N5934B reliable?
The price and inventory of 1N5934B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5934B is usually 5 days.
3.What payment methods are accepted for 1N5934B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5934B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5934B?
1N5934B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5934B 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 1N5934B?
For technical support, including 1N5934B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5934B requirements.
6.How does Aetrix verify that 1N5934B is sourced from the original manufacturer or authorized distributors?
All 1N5934B 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 1N5934B meets industry standards.
7.What is the process for return or replacement of 1N5934B?
All 1N5934B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5934B, 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 1N5934B part is unused and in its original packaging.
Return procedure for 1N5934B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5934B 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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