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onsemi 1N5953B
- Part No.:
- 1N5953B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AL, DO-41, Axial
- Datasheet:
-
1N5953B.pdf
- Description:
- DIODE ZENER 150V 3W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:9,647
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Product details
Overview
1N5953B from onsemi is a 3 W, ±5% tolerance Zener diode with nominal zener voltage of 150 V, maximum zener impedance of 2.5 Ω at 600 mA test current, and surge rating of 98 W for 1 ms. It operates from −65 °C to +200 °C and is used in overvoltage protection and precision voltage reference circuits in industrial power supplies.
For engineers reviewing the 1N5953B datasheet, pinout, applications, or equivalent options, this device serves as a stable, high-voltage regulation element where tight voltage tolerance, low dynamic impedance, and robust surge handling are required in axial-lead, DO-41 packaged designs.
Technical Context
The 1N5953B employs a silicon-oxide passivated junction for stable breakdown characteristics and low leakage. Its thermal design relies on lead-to-ambient conduction, with steady-state dissipation derated above 75 °C (24 mW/°C) when lead length is 3/8″.
It delivers regulated reverse-biased operation with guaranteed parameters including VZ, IZT, ZZT, IZK, ZZK, and IR - all tested under controlled lead temperature (TL = 30 °C ±1 °C, measured 3/8″ from body).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Nominal Zener Voltage | 150 V - precise regulation point at IZT = 600 mA, enabling stable reference in high-voltage feedback loops |
| Zener Tolerance | ±5% - ensures predictable voltage window (142.5 V to 157.5 V) without binning or trimming |
| Max Zener Impedance | 2.5 Ω @ IZT - low dynamic resistance maintains regulation accuracy under load transients |
| Steady-State Power | 3 W @ TL = 75 °C - supports continuous operation in compact, non-heatsinked layouts with 3/8″ lead length |
| Surge Rating | 98 W @ 1 ms - withstands short-duration overvoltage events such as inductive kickback or ESD-induced spikes |
| Reverse Leakage | 0.25 μA @ VR = 114 V - minimal standby current preserves efficiency in high-impedance bias networks |
| Operating Temperature | −65 °C to +200 °C - suitable for under-hood automotive, industrial motor drives, and downhole electronics |
Pinout & Package
Package: DO-41 (Case 59), axial-lead, transfer-molded plastic. Cathode identified by polarity band. Mounting position unrestricted.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Cathode (banded end) | Zener breakdown anode terminal | Connected to higher-potential node; reverse-biased operation requires cathode at voltage ≥ VZ relative to anode |
| Anode | Zener breakdown cathode terminal | Reference/ground node; current flows from cathode to anode during regulation |
Key Features
| Feature | Design Value |
|---|---|
| ESD robustness | Class 3 (>16 kV HBM) - eliminates need for external ESD protection in board-level transient environments |
| Pb-free packaging | G-suffix indicates RoHS-compliant, void-free thermosetting plastic - meets global environmental compliance without performance trade-off |
| Surge capability | 98 W peak for 1 ms - handles repetitive line surges in AC/DC front-end clamping without degradation |
| Small footprint | DO-41 package identical in size to conventional 1 W Zeners - enables drop-in upgrade of power handling without PCB rework |
| Guaranteed six parameters | VZ, IZT, ZZT, IZK, ZZK, IR all 100% tested - reduces incoming inspection burden and improves BOM reliability |
Applications
| Industrial Power Supply Feedback | Overvoltage Clamp for Relay Drivers |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback network. IC Role / Device Role / Timing Role: Precision voltage reference establishing error amplifier threshold. Use Value: ±5% VZ tolerance and 2.5 Ω ZZT ensure <±1% output regulation across line/load/temperature in 24–48 V systems. |
Use Scenario: Suppressing inductive kickback from 24 V DC solenoid coils switching at ≤10 Hz. IC Role / Device Role / Timing Role: Transient voltage suppressor clamping coil voltage to safe levels during turn-off. Use Value: 98 W surge rating absorbs 100 mJ pulses without degradation, extending relay contact life and protecting driver ICs. |
| High-Voltage Sensor Biasing | Programmable Threshold Detector |
Use Scenario: Providing stable 150 V bias to photomultiplier tube (PMT) dynode chain in radiation detection modules. IC Role / Device Role / Timing Role: Low-noise, low-leakage voltage source maintaining dynode potential gradients. Use Value: 0.25 μA leakage at 114 V minimizes current error in high-impedance divider networks, preserving signal-to-noise ratio. |
Use Scenario: Setting trip point for comparator-based overvoltage alarm in telecom rectifier shelves. IC Role / Device Role / Timing Role: Reference element defining comparator input threshold. Use Value: Tight 142.5–157.5 V window enables accurate detection of >10% overvoltage events without calibration drift. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5953A | ±10% tolerance (135–165 V range) vs. ±5% for 1N5953B | Acceptable where wider regulation window is permissible, e.g., non-critical biasing | Select 1N5953A only if cost sensitivity outweighs voltage accuracy requirements |
| BZX85C150 | 1.3 W rating, TO-226AA package, 150 V nominal, ±5% - lower power, different thermal path | Suitable for low-power analog references but not for 3 W continuous dissipation | Choose BZX85C150 only in space-constrained designs where 1 W suffices and lead-mounting is impractical |
Compared with 1N5953A and BZX85C150, the 1N5953B uniquely combines 3 W power handling, ±5% tolerance, and DO-41 compatibility - making it the only option for high-accuracy, high-energy clamping in legacy axial-lead industrial hardware.
Availability
1N5953B is available at Aetrix Electronics and suitable for industrial power supply feedback, overvoltage clamp for relay drivers, high-voltage sensor biasing, and programmable threshold detector applications requiring stable component supply and long-term obsolescence management.
Supply support for 1N5953B 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 1N5913B Series is part of onsemi's legacy Zener regulator portfolio designed for high-reliability, high-voltage stabilization in cost-sensitive, high-volume industrial and power conversion applications.
FAQ
What is the maximum steady-state power dissipation of the 1N5953B at 75°C lead temperature?
The 1N5953B has a maximum steady-state power dissipation of 3 W at a lead temperature (TL) of 75°C with 3/8″ lead length. Above 75°C, it derates linearly at 24 mW/°C. This rating assumes proper heat conduction through the leads and is validated per onsemi's published derating curve (Figure 1). The 1N5953B must be mounted with adequate thermal path to maintain reliability under continuous load.
How does the 1N5953B differ from the 1N5953A in terms of voltage tolerance and application suitability?
The 1N5953B features ±5% zener voltage tolerance (142.5–157.5 V), while the 1N5953A offers ±10% (135–165 V). This tighter tolerance makes the 1N5953B suitable for precision feedback and clamping where voltage accuracy directly impacts system stability. The 1N5953B is preferred in regulated power supplies and safety-critical overvoltage protection, whereas the 1N5953A may suffice in non-critical bias networks.
What is the reverse leakage current specification for the 1N5953B, and at what voltage is it measured?
The 1N5953B specifies a maximum reverse leakage current (IR) of 0.25 μA at VR = 114 V - which is 76% of its nominal 150 V zener voltage. This ultra-low leakage ensures minimal current draw in high-impedance reference dividers and preserves accuracy in battery-powered or low-quiescent-current applications. Measurement is performed at TL = 30°C, 3/8″ from the diode body.
Can the 1N5953B be used in surface-mount designs?
No - the 1N5953B is exclusively offered in the axial-lead DO-41 (Case 59) package and is not available in surface-mount variants. Its mechanical construction, thermal path, and soldering profile (260°C for 10 seconds at 1/16″ from case) are optimized for through-hole mounting. For SMT equivalents, designers should consider onsemi's NZ9F150 or similar SOD-123 devices - but these differ in power rating, impedance, and thermal behavior versus the 1N5953B.
What is the surge power rating of the 1N5953B, and how is it validated?
The 1N5953B is rated for 98 W nonrepetitive surge power at 1 ms pulse width, per Figure 3 of the onsemi datasheet. This rating is determined experimentally under rectangular waveform conditions with TJ = 25°C prior to pulse, and reflects robustness against transient overvoltages like inductive switching spikes or lightning-induced surges. It is not derived from thermal resistance calculations and must not be extrapolated beyond the specified pulse duration or duty cycle.
1N5953B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AL, DO-41, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 150 V
- Tolerance:
- ±5%
- Power - Max:
- 3 W
- Impedance (Max) (Zzt):
- 600 Ohms
- Current - Reverse Leakage @ Vr:
- 1 µA @ 114 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
1N5953B FAQ
1.How can I place an order for 1N5953B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5953B 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 1N5953B reliable?
The price and inventory of 1N5953B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5953B is usually 5 days.
3.What payment methods are accepted for 1N5953B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5953B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5953B?
1N5953B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5953B 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 1N5953B?
For technical support, including 1N5953B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5953B requirements.
6.How does Aetrix verify that 1N5953B is sourced from the original manufacturer or authorized distributors?
All 1N5953B 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 1N5953B meets industry standards.
7.What is the process for return or replacement of 1N5953B?
All 1N5953B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5953B, 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 1N5953B part is unused and in its original packaging.
Return procedure for 1N5953B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5953B 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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