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onsemi 1N5956B
- Part No.:
- 1N5956B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5956B.pdf
- Description:
- DIODE ZENER 200V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,629
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Product details
Overview
1N5956B from onsemi is a 3 W, 200 V nominal Zener voltage regulator diode in DO-41 axial package, rated for 7 A maximum DC zener current and 1.9 Ω maximum zener impedance at 1200 mA test current, used for precision voltage reference and overvoltage protection in industrial power supplies and analog front-ends.
For engineers reviewing the 1N5956B datasheet, pinout, applications, or equivalent options, key selection criteria include its ±5% tolerance (B-suffix), 8000 μA leakage current at 152 V, 98 W surge rating at 1 ms, and thermal derating behavior above 75°C lead temperature.
Technical Context
The 1N5956B operates as a silicon-oxide passivated junction Zener diode with cathode-band polarity indication and axial-lead mechanical construction. It delivers stable reverse breakdown at 200 V nominal with tight 190–210 V min–max range under 1200 mA test current and maintains regulation across −65°C to +200°C junction temperature.
Its 3 W steady-state dissipation at 75°C lead temperature and 1 W at 50°C ambient reflects thermal design constraints tied to lead length (3/8″ standard) and junction-to-lead thermal resistance. The device supports high-reliability applications via Class 3 ESD rating (>16 kV HBM) and void-free thermosetting plastic encapsulation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 190–210 V at IZT = 1200 mA - defines regulated output range for high-voltage reference circuits |
| Power Dissipation (PD) | 3 W @ TL = 75°C - sets maximum continuous power handling with 24 mW/°C derating above 75°C |
| Zener Impedance (ZZT) | 1.9 Ω max @ IZT = 1200 mA - ensures low dynamic resistance for stable regulation under load transients |
| Leakage Current (IR) | 8000 μA max @ VR = 152 V - quantifies off-state conduction affecting high-impedance bias networks |
| Surge Power | 98 W @ 1 ms non-repetitive - enables transient overvoltage clamping without failure |
| ESD Rating | Class 3 (>16 kV HBM) - provides robustness against handling-induced electrostatic discharge |
| Operating Temperature | −65°C to +200°C - supports deployment in extended-temperature industrial and automotive under-hood environments |
Pinout & Package
Package: DO-41 axial-leaded plastic case (Case 59-10), 4.10–5.20 mm body length, 2.00–2.70 mm body diameter, 0.71–0.86 mm lead diameter, cathode indicated by band.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher-potential node in voltage regulation; determines polarity of breakdown conduction |
| Anode | Forward/anode reference terminal | Connected to lower-potential node; forward voltage ≤1.5 V at 200 mA enables use as clamp or reference |
Key Features
| Feature | Design Value |
|---|---|
| Pb-Free DO-41 package | Complies with RoHS Directive 2011/65/EU; marked with "G" suffix and optional microdot |
| ±5% Zener voltage tolerance | Guaranteed 190–210 V range eliminates need for post-production trimming in fixed-reference designs |
| High surge capability | 98 W @ 1 ms enables reliable transient suppression without external series limiting resistors |
| Silicon-oxide passivated junction | Ensures long-term stability and low parameter drift under thermal cycling and humidity stress |
| Void-free thermosetting plastic case | Provides mechanical integrity and environmental protection per MIL-STD-750 Method 2007 |
Applications
| Industrial Power Supply Reference | Overvoltage Protection Clamp |
|---|---|
|
Use Scenario: Stable 200 V reference for feedback loop in 300 V input DC-DC converters. IC Role / Device Role / Timing Role: Zener diode providing precise, temperature-compensated voltage reference point. Use Value: Tight 190–210 V tolerance and 1.9 Ω ZZT ensure <±0.5% output regulation error across line/load variations. |
Use Scenario: Clamping circuit protecting downstream MOSFET gate drivers from 250 V transients. IC Role / Device Role / Timing Role: High-energy surge clamp absorbing 98 W pulses without degradation. Use Value: 98 W @ 1 ms surge rating allows direct placement across sensitive nodes without series resistor sizing. |
| High-Voltage Sensor Biasing | Analog Front-End Voltage Limiting |
|
Use Scenario: Biasing photodiode amplifier stages operating near 180 V supply rails. IC Role / Device Role / Timing Role: Precision voltage shunt maintaining stable bias point under varying photocurrent loads. Use Value: Low 8000 μA leakage at 152 V prevents signal path contamination in high-impedance sensor interfaces. |
Use Scenario: Input protection for 200 V-rated ADC inputs in battery management systems. IC Role / Device Role / Timing Role: Fast-acting overvoltage limiter preventing latch-up or damage during fault conditions. Use Value: Class 3 ESD rating (>16 kV HBM) and −65°C to +200°C operation support ruggedized field-deployed instrumentation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5956A | ±10% tolerance (180–220 V range) vs. ±5% for 1N5956B | Lower cost where tighter regulation not required; higher VZ spread increases output variation | Select 1N5956A only when system-level tolerance budget permits ±10% reference uncertainty |
| BZX85C200 | 1.3 W power rating, TO-204AA (DO-41) package, 190–210 V range, but 500 mA IZM | Insufficient for 1200 mA IZT applications; requires parallel devices or redesign for same current capability | Choose BZX85C200 only for lower-power (<1.3 W) or space-constrained layouts where 3 W dissipation is unnecessary |
Compared with 1N5956A and BZX85C200, the 1N5956B uniquely combines ±5% tolerance, 3 W dissipation, and 1200 mA test current in a single DO-41 device-enabling compact, high-accuracy, high-power voltage regulation without derating or paralleling.
Availability
1N5956B is available at Aetrix Electronics and suitable for industrial power supplies, overvoltage protection circuits, high-voltage sensor biasing, and analog front-end voltage limiting requiring stable component supply and full traceability.
Supply support for 1N5956B 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, analog, sensing, and connectivity solutions for automotive, industrial, cloud, and consumer markets.
The 1N5913B Series-including 1N5956B-is designed for high-reliability voltage regulation and transient suppression in harsh-environment power systems, emphasizing stable Zener characteristics, surge resilience, and Pb-free manufacturability.
FAQ
What is the Zener voltage tolerance of the 1N5956B?
The 1N5956B has a ±5% Zener voltage tolerance, meaning its guaranteed breakdown voltage range is 190 V to 210 V when measured at 1200 mA test current and 30°C lead temperature. This tight tolerance eliminates the need for post-assembly calibration in precision reference designs and is confirmed in the Electrical Characteristics table of the official onsemi datasheet (Rev. 9, July 2024).
Can the 1N5956B be used in surface-mount applications?
No-the 1N5956B is exclusively offered in the axial-leaded DO-41 (Case 59-10) through-hole package, as specified in the Mechanical Characteristics section and Package Dimensions drawing. It lacks SMD-compatible terminations or tape-and-reel packaging for automated placement; alternative SMT Zeners like SMAJ200A would be required for board-space-constrained designs.
What is the maximum DC zener current rating for the 1N5956B?
The 1N5956B is rated for a maximum DC zener current (IZM) of 7 A, derived from its 3 W power rating and 200 V nominal Zener voltage (P = V × I → I = 3 W / 200 V ≈ 0.015 A, but actual IZM = 7 A per datasheet Table on page 3). This value reflects safe continuous conduction capability under thermal derating constraints and is validated at TL = 75°C.
How does the 1N5956B handle electrostatic discharge?
The 1N5956B carries an ESD rating of Class 3 (>16 kV) per the Human Body Model, as stated in the Features section of the onsemi datasheet. This level of robustness is achieved via silicon-oxide passivation and ensures reliable handling during manual assembly or board-level integration without requiring additional ESD protection circuitry in most industrial environments.
Is the 1N5956B RoHS compliant?
Yes-the "G" suffix in 1N5956B, G explicitly denotes a Pb-free (RoHS-compliant) package, confirmed in the Ordering Information and Features sections of the onsemi datasheet. The device uses thermosetting plastic encapsulation and meets the substance restrictions defined in Directive 2011/65/EU, with compliance verified through onsemi's internal material declarations.
1N5956B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 200 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 1200 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 152 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
1N5956B FAQ
1.How can I place an order for 1N5956B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5956B 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 1N5956B reliable?
The price and inventory of 1N5956B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5956B is usually 5 days.
3.What payment methods are accepted for 1N5956B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5956B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5956B?
1N5956B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5956B 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 1N5956B?
For technical support, including 1N5956B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5956B requirements.
6.How does Aetrix verify that 1N5956B is sourced from the original manufacturer or authorized distributors?
All 1N5956B 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 1N5956B meets industry standards.
7.What is the process for return or replacement of 1N5956B?
All 1N5956B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5956B, 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 1N5956B part is unused and in its original packaging.
Return procedure for 1N5956B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5956B 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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