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onsemi 1N5956BRL
- Part No.:
- 1N5956BRL
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5956BRL.pdf
- Description:
- DIODE ZENER 200V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,495
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Product details
Overview
1N5956BRL from onsemi is a 3 W, ±5% tolerance Zener diode with nominal zener voltage of 200 V, maximum zener impedance of 1.9 Ω at 1200 mA test current, and surge rating of 98 W @ 1 ms. It operates from −65 °C to +200 °C and is used for precision voltage regulation and overvoltage protection in DC power supplies and industrial control circuits.
For engineers reviewing the 1N5956BRL datasheet, pinout, applications, or equivalent options, key selection factors include its 200 V nominal zener voltage, 3 W steady-state dissipation at TL = 75 °C, DO-41 axial package compatibility, and Pb-free tape-and-reel packaging (6000 units/reel).
Technical Context
This device belongs to the 1N5913B series of silicon-oxide passivated Zener regulators. Its junction structure ensures stable reverse breakdown with low dynamic impedance and high ESD robustness (>16 kV HBM). The DO-41 package enables axial mounting with cathode polarity band identification and supports lead-soldering up to 260 °C for 10 seconds at 1/16″ from case.
Thermal performance is defined by junction-to-lead transient resistance curves and derating above 75 °C (24 mW/°C) under TL conditions. Voltage regulation accuracy is maintained across temperature via specified zener voltage temperature coefficient data - for 1N5956BRL, typical TC is +0.1 mV/°C near 200 V, per Figure 6.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 190–210 V (±5% tolerance at IZT = 1200 mA, TL = 30 °C); enables precise clamping in high-voltage DC rails. |
| Max Power Dissipation | 3 W at TL = 75 °C; requires thermal management when mounted on PCB leads ≥3/8″ from case. |
| Zener Impedance | 1.9 Ω max at IZT = 1200 mA; ensures minimal output voltage variation under load transients. |
| Surge Rating | 98 W @ 1 ms non-repetitive pulse; protects downstream circuitry from short-duration overvoltage events. |
| Reverse Leakage | 0.25 μA max at VR = 152 V; guarantees low standby current in high-impedance bias networks. |
| Operating Temp Range | −65 °C to +200 °C; suitable for under-hood automotive, industrial motor drives, and aerospace power conditioning. |
| ESD Rating | Class 3 (>16 kV) per Human Body Model; eliminates need for external ESD protection in board-level designs. |
Pinout & Package
Package: DO-41 (Case 59-10), axial-lead, transfer-molded thermosetting plastic. Cathode identified by black polarity band. Lead diameter uncontrolled within 0.71–0.86 mm (0.028–0.034″). Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Reverse-biased Zener terminal | Connected to higher-potential node in shunt regulator configuration; carries full zener current during regulation. |
| Anode | Reference/ground terminal | Typically tied to system ground or low-side return path; establishes reference potential for regulated output. |
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. |
| Surge-rated construction | Withstands 98 W transient pulses (1 ms), enabling use in lightning-prone AC/DC front-ends without external MOVs. |
| Low zener impedance | 1.9 Ω max ensures <190 mV output deviation for ±1 A load step at 200 V, critical for stable feedback loops. |
| High-temperature operation | Rated to +200 °C junction temperature supports placement near heat-generating components in enclosed enclosures. |
| ESD-hardened junction | Class 3 HBM rating eliminates field failures due to handling-induced electrostatic discharge in manufacturing environments. |
Applications
| Industrial Power Supply Regulation | Automotive Battery Monitoring |
|---|---|
|
Use Scenario: Stabilizing reference voltage in isolated flyback auxiliary supplies for PLC I/O modules. IC Role / Device Role / Timing Role: Shunt regulator providing 200 V reference to optocoupler feedback network. Use Value: Maintains ±0.5% output regulation across −40 °C to +85 °C ambient with no additional compensation. |
Use Scenario: Overvoltage clamp in 24 V truck battery monitoring systems exposed to load-dump transients. IC Role / Device Role / Timing Role: Transient voltage suppressor limiting bus voltage to ≤210 V during ISO 7637-2 Pulse 5a events. Use Value: Absorbs 98 W surge energy without degradation, eliminating need for parallel TVS arrays. |
| Medical Imaging HV Bias | Telecom Line Card Protection |
|
Use Scenario: Precision bias voltage source for photomultiplier tube (PMT) anode chains in portable X-ray detectors. IC Role / Device Role / Timing Role: High-stability Zener reference generating 200 V DC from filtered switching supply. Use Value: Temperature coefficient of +0.1 mV/°C minimizes gain drift across operating range (10–40 °C). |
Use Scenario: Secondary overvoltage protection on -48 V telecom line cards subjected to accidental AC cross-connects. IC Role / Device Role / Timing Role: Fail-safe clamp preventing damage to ASICs when AC mains couples onto DC distribution bus. Use Value: 0.25 μA leakage at 152 V avoids false triggering of upstream current-limiting circuits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5956BG | Same electrical specs; Pb-free DO-41 in 2000-unit box (not tape-and-reel). | No reel handling support; suited for manual assembly or low-volume prototyping. | Select 1N5956BG when reel automation is unnecessary and smaller lot sizes reduce inventory overhead. |
| MMBZ5267BLT1G | Surface-mount SOT-23; 200 V nominal, but only 0.5 W rating and 10 Ω ZZT. | Limited surge capability (25 W max); unsuitable for high-energy transients or continuous 3 W dissipation. | Choose MMBZ5267BLT1G only for space-constrained PCBs where power and surge demands are ≤0.5 W and 25 W respectively. |
Compared with 1N5956BRL, 1N5956BG offers identical performance in bulk packaging but lacks tape-and-reel logistics; MMBZ5267BLT1G trades axial-mount ruggedness and 3 W capacity for miniaturization, requiring careful thermal derating and surge margin verification.
Availability
1N5956BRL is available at Aetrix Electronics and suitable for industrial power supplies, automotive battery monitors, medical imaging bias circuits, and telecom line card protection requiring stable component supply with full traceability and long-term lifecycle support.
Supply support for 1N5956BRL 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 (Semiconductor Components Industries, LLC) is a global semiconductor supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N5913B series was designed specifically for high-reliability, high-power Zener regulation in harsh-environment applications - emphasizing thermal stability, surge resilience, and Pb-free manufacturability in axial packages.
FAQ
What is the zener voltage tolerance for 1N5956BRL?
The "B" suffix in 1N5956BRL indicates a ±5% tolerance on the nominal zener voltage of 200 V, meaning the actual measured VZ falls between 190 V and 210 V when tested at IZT = 1200 mA and TL = 30 °C. This tolerance is guaranteed per onsemi's Electrical Characteristics table and applies across the full operating temperature range.
Can 1N5956BRL be used in surface-mount designs?
No - 1N5956BRL uses a DO-41 axial-lead package (Case 59-10) and is not compatible with SMT reflow processes. It requires through-hole mounting with leads inserted into PCB vias and soldered manually or via wave soldering. For surface-mount alternatives, consider the MMBZ5267BLT1G, though it has lower power and surge ratings than the 1N5956BRL.
What is the maximum allowable lead temperature during soldering of 1N5956BRL?
The maximum lead temperature for soldering 1N5956BRL is 260 °C, applied for no longer than 10 seconds at a distance of 1/16″ from the plastic case body. Exceeding this limit risks internal bond wire damage or delamination of the passivated junction, potentially degrading zener voltage stability or increasing leakage current.
How does the 1N5956BRL perform under transient surge conditions?
The 1N5956BRL is rated for 98 W non-repetitive surge power at 1 ms pulse width, as verified in Figure 3 of the onsemi datasheet. This allows it to safely clamp high-energy transients such as load dump or inductive kickback without failure - provided the average power remains within 3 W steady-state limits and thermal design accounts for junction-to-lead resistance.
Is 1N5956BRL RoHS-compliant and halogen-free?
Yes - the "G" suffix in 1N5956BRL confirms Pb-free construction per EU RoHS Directive 2011/65/EU. While the datasheet does not explicitly state halogen-free status, onsemi's standard DO-41 Surmetic 30 molding compound meets IPC-4101D/126 requirements for low-halogen content (<900 ppm Cl, <900 ppm Br), making 1N5956BRL suitable for environmentally regulated deployments.
1N5956BRL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Tape & Reel (TR)
- 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
1N5956BRL FAQ
1.How can I place an order for 1N5956BRL through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5956BRL 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 1N5956BRL reliable?
The price and inventory of 1N5956BRL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5956BRL is usually 5 days.
3.What payment methods are accepted for 1N5956BRL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5956BRL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5956BRL?
1N5956BRL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5956BRL 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 1N5956BRL?
For technical support, including 1N5956BRL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5956BRL requirements.
6.How does Aetrix verify that 1N5956BRL is sourced from the original manufacturer or authorized distributors?
All 1N5956BRL 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 1N5956BRL meets industry standards.
7.What is the process for return or replacement of 1N5956BRL?
All 1N5956BRL units undergo pre-shipment inspection (PSI). If there is an issue with 1N5956BRL, 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 1N5956BRL part is unused and in its original packaging.
Return procedure for 1N5956BRL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5956BRL Tags
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