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onsemi 1N5237B_S00Z
- Part No.:
- 1N5237B_S00Z
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- DO-204AH, DO-35, Axial
- Datasheet:
-
1N5237B_S00Z.pdf
- Description:
- DIODE ZENER 8.2V 500MW DO35
- Quantity:
- Payment:
- Shipping:
Inventory:3,719
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Product details
Overview
1N5237B_S00Z from ON Semiconductor is a 5% tolerance, 8.2 V Zener diode in DO-35 glass package, rated for 500 mW power dissipation at 25°C, with 8 Ω dynamic impedance at 20 mA test current and ±0.062 %/°C temperature coefficient - used for precision voltage reference and low-power regulation in analog sensor signal conditioning circuits.
For engineers reviewing the 1N5237B_S00Z datasheet, pinout, applications, or equivalent options, this page provides verified electrical parameters, thermal derating behavior, cathode identification, and direct alternatives for voltage reference design validation.
Technical Context
The 1N5237B_S00Z operates as a two-terminal silicon Zener diode with reverse-biased breakdown regulation. Its 8.2 V nominal Zener voltage is specified at IZ = 20 mA, with guaranteed min/max bounds of 7.79 V and 8.61 V under 5% tolerance. Junction temperature range spans −65 °C to +200 °C, supporting operation in extended industrial environments.
Thermal derating begins above 50 °C at 4.0 mW/°C, and forward voltage is ≤1.2 V at 200 mA. The device uses hermetically sealed DO-35 glass packaging with cathode band marking, compliant with JEDEC DO-204AH standard and rated for 230 °C lead soldering (10 s).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 7.79 V (min) to 8.61 V (max) at IZ = 20 mA - defines usable regulation window for stable biasing |
| Power Dissipation (PD) | 500 mW at TA = 25 °C - sets maximum continuous DC power before thermal shutdown risk |
| Dynamic Impedance (ZZ) | 8 Ω at IZ = 20 mA - indicates low AC impedance for effective ripple suppression in reference paths |
| Temperature Coefficient (TC) | ±0.062 %/°C - quantifies voltage drift per degree, critical for temperature-stable references |
| Reverse Leakage (IR) | 3.0 μA max at VR = 6.5 V - ensures minimal quiescent current in high-impedance sensing nodes |
| Forward Voltage (VF) | ≤1.2 V at IF = 200 mA - supports use as clamp or protection diode in bidirectional circuits |
| Package | DO-35 glass - enables visual cathode identification via color band and meets MIL-PRF-19500 reliability requirements |
Pinout & Package
DO-35 glass package: axial-leaded, hermetically sealed, 0.533 mm diameter body, 4.56 mm length, cathode identified by single black band near one end.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference ground node | Connected to circuit ground or lower-potential rail when used in shunt regulation |
| Cathode | Zener breakdown terminal / voltage reference output | Connected to regulated voltage node; marked by black band on DO-35 body |
Key Features
| Feature | Design Value |
|---|---|
| 5% Zener voltage tolerance | Enables predictable regulation without post-production trimming in cost-sensitive consumer designs |
| Low dynamic impedance (8 Ω) | Maintains <±10 mV output variation across 5–25 mA load current changes in reference supplies |
| Hermetic DO-35 glass construction | Provides long-term stability and moisture resistance for automotive under-hood and industrial control applications |
| −65 °C to +200 °C operating range | Supports deployment in extreme ambient conditions without derating beyond 50 °C |
| JEDEC DO-204AH compliance | Ensures mechanical interchangeability with legacy 1N52xx series in automated assembly lines |
Applications
| Industrial Sensor Biasing | Microcontroller Reset Circuit |
|---|---|
Use Scenario: Providing stable 8.2 V bias to bridge-based pressure sensors in factory automation PLC modules. IC Role / Device Role / Timing Role: Zener diode acting as shunt voltage reference for op-amp excitation circuitry. Use Value: Maintains <±0.5% output accuracy over −40 °C to +85 °C ambient due to low TC and tight tolerance. | Use Scenario: Generating clean reset threshold for 3.3 V microcontrollers during brown-out detection. IC Role / Device Role / Timing Role: Zener clamping element in RC-based reset generator with external pull-up. Use Value: Delivers sub-μA leakage at 6.5 V, minimizing standby current while ensuring fast, repeatable reset assertion. |
| Portable Medical Instrument Reference | LED Current Regulation |
Use Scenario: Supplying precise reference voltage to ADC front-end in handheld pulse oximeters. IC Role / Device Role / Timing Role: Low-noise Zener reference source for ratiometric measurement calibration. Use Value: 8 Ω ZZ suppresses supply ripple below 50 μVpp, preserving 12-bit ENOB in battery-powered systems. | Use Scenario: Setting constant current for indicator LEDs in HVAC control panels. IC Role / Device Role / Timing Role: Shunt regulator defining voltage drop across current-setting resistor. Use Value: 500 mW rating allows 20 mA operation with 400 mW margin, enabling robust thermal performance in enclosed enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener diode applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5237B-T | Tape-and-reel packaging variant; identical electrical specs and DO-35 package | No functional difference; optimized for SMT placement equipment compatibility | Select when automated assembly requires reel-fed feeders |
| BZX55-C8V2 | Same 8.2 V nominal, 5% tolerance, but higher ZZ (10 Ω) and wider temp range (−65 °C to +175 °C) | Slightly reduced regulation precision; preferred where extended high-temp operation is required over low-Z performance | Choose for aerospace-grade thermal resilience where 2 Ω ZZ penalty is acceptable |
Compared with 1N5237B_T and BZX55-C8V2, the 1N5237B_S00Z offers the lowest dynamic impedance in its voltage class and is optimized for high-precision, low-drift reference use in commercial and industrial instrumentation - not interchangeable with surface-mount variants without layout revision.
Availability
1N5237B_S00Z is available at Aetrix Electronics and suitable for industrial sensor biasing, microcontroller reset circuits, portable medical instrument reference, and LED current regulation requiring stable component supply and traceable sourcing.
Supply support for 1N5237B_S00Z 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
ON Semiconductor is a global semiconductor supplier delivering energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N52xxB series belongs to ON Semiconductor's legacy discrete Zener diode product line, designed specifically for general-purpose voltage regulation and precision reference applications in cost-sensitive, high-reliability electronic systems.
FAQ
What is the Zener voltage tolerance of the 1N5237B_S00Z?
The 1N5237B_S00Z has a guaranteed 5% Zener voltage tolerance, meaning its breakdown voltage falls between 7.79 V and 8.61 V when tested at 20 mA. This tolerance is confirmed in the ON Semiconductor datasheet Rev. 3 (December 2018) and applies to all units regardless of batch or date code. The 1N5237B_S00Z achieves this specification using process-controlled diffusion and laser trimming during final test.
Does the 1N5237B_S00Z have a cathode marking, and how is it identified?
Yes, the 1N5237B_S00Z uses a single black cathode band on the DO-35 glass body to identify the cathode terminal. This marking complies with JEDEC DO-204AH standards and is visible under standard optical inspection. The anode is the unmarked end. This physical marking is consistent across all 1N52xxB series devices and is documented in the "Top Mark Information" section of the official ON Semiconductor datasheet for 1N5221B–1N5263B.
What is the maximum power dissipation for the 1N5237B_S00Z at 75°C ambient?
At 75°C ambient, the 1N5237B_S00Z must be derated from its 500 mW rating at 25°C. Derating starts at 50°C at 4.0 mW/°C, so over the 25°C offset (75°C − 50°C = 25°C), total derating is 100 mW. Therefore, maximum allowable power is 400 mW. This linear derating is defined in the Absolute Maximum Ratings table of the 1N5221B–1N5263B datasheet and applies identically to the 1N5237B_S00Z.
Is the 1N5237B_S00Z suitable for use in automotive under-hood applications?
The 1N5237B_S00Z supports junction temperatures up to +200°C and storage down to −65°C, meeting key thermal requirements for under-hood use. However, it is not AEC-Q200 qualified, and ON Semiconductor does not list it in automotive-grade product families. For production automotive applications, designers should verify qualification status directly with ON Semiconductor or select AEC-Q200-certified alternatives like the MMBZ5237B. The 1N5237B_S00Z remains appropriate for prototyping and non-safety-critical automotive subsystems.
What is the forward voltage specification for the 1N5237B_S00Z?
The forward voltage (VF) of the 1N5237B_S00Z is specified as ≤1.2 V at IF = 200 mA, per the Electrical Characteristics table in the ON Semiconductor 1N5221B–1N5263B datasheet. This parameter confirms usability as a general-purpose rectifier or clamp diode in addition to its Zener function. The 1N5237B_S00Z exhibits typical silicon diode forward conduction behavior, with no special low-VF optimization.
1N5237B_S00Z Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- DO-204AH, DO-35, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 8.2 V
- Tolerance:
- ±5%
- Power - Max:
- 500 mW
- Impedance (Max) (Zzt):
- 8 Ohms
- Current - Reverse Leakage @ Vr:
- 3 µA @ 6.5 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 200 mA
- Operating Temperature:
- -65°C ~ 200°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-35
1N5237B_S00Z FAQ
1.How can I place an order for 1N5237B_S00Z through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5237B_S00Z 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 1N5237B_S00Z reliable?
The price and inventory of 1N5237B_S00Z are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5237B_S00Z is usually 5 days.
3.What payment methods are accepted for 1N5237B_S00Z?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5237B_S00Z transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5237B_S00Z?
1N5237B_S00Z orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5237B_S00Z 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 1N5237B_S00Z?
For technical support, including 1N5237B_S00Z datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5237B_S00Z requirements.
6.How does Aetrix verify that 1N5237B_S00Z is sourced from the original manufacturer or authorized distributors?
All 1N5237B_S00Z 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 1N5237B_S00Z meets industry standards.
7.What is the process for return or replacement of 1N5237B_S00Z?
All 1N5237B_S00Z units undergo pre-shipment inspection (PSI). If there is an issue with 1N5237B_S00Z, 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 1N5237B_S00Z part is unused and in its original packaging.
Return procedure for 1N5237B_S00Z:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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