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onsemi 1N5372B
- Part No.:
- 1N5372B
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5372B.pdf
- Description:
- DIODE ZENER 62V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:3,437
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Product details
Overview
1N5372B from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 62 V, ±5% tolerance, 20 Ω maximum zener impedance at 42 mA test current, and 1.35 μA maximum leakage current at 47.1 V. It delivers precise voltage regulation in power supply feedback loops, overvoltage protection circuits, and reference voltage generation for industrial power converters.
For engineers reviewing the 1N5372B datasheet, pinout, applications, or equivalent options, key selection criteria include its 62 V nominal breakdown voltage, 400 A surge rating at 8.3 ms, 25 °C/W junction-to-lead thermal resistance, and compatibility with lead-free reflow soldering up to 260 °C.
Technical Context
The 1N5372B operates as a silicon-oxide passivated junction Zener regulator, optimized for stable DC voltage clamping under steady-state and transient conditions. Its design supports tight voltage regulation (±5%) across temperature and load variations, with guaranteed limits on six electrical parameters including VZ, IZM, ZZT, ZZK, IR, and VF.
It features Class 3 ESD immunity (>16 kV HBM), 180 W non-repetitive surge capability at 8.3 ms, and thermal performance validated for axial-lead mounting with 3/8″ lead length. The device maintains regulation integrity from −65 °C to +150 °C continuous operation (up to +200 °C pulsed).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 58.9–65.1 V @ IZT = 42 mA; ensures precise 62 V regulation with ±5% tolerance for feedback and reference applications |
| Max Power Dissipation | 5 W @ TL = 25 °C; defines safe continuous operating envelope in PCB-mounted power regulation circuits |
| Zener Impedance | 20 Ω max @ IZT = 42 mA; guarantees low dynamic resistance for minimal output voltage variation under load transients |
| Leakage Current | 1.35 μA max @ VR = 47.1 V; enables high-impedance sensing and low-quiescent-current standby modes |
| Surge Current | 400 A peak @ 8.3 ms pulse; provides robust transient overvoltage suppression without failure |
| Junction-to-Lead RθJL | 25 °C/W; allows accurate thermal modeling when mounted with 3/8″ lead length to heatsink or PCB copper |
| ESD Rating | Class 3 (>16 kV HBM); ensures handling robustness during automated assembly and field service |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), cathode indicated by band. Dimensions: 8.38–8.89 mm length × 3.30–3.68 mm diameter; lead diameter uncontrolled, 1.000–1.250 inch overall length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Zener cathode reference node | Connected to lower-potential side of regulated circuit; establishes reference ground for feedback networks |
| Cathode | Zener breakdown terminal / regulated output node | Connected to higher-potential side; delivers stable 62 V output when reverse-biased above VZ |
Key Features
| Feature | Design Value |
|---|---|
| ±5% Zener voltage tolerance | Guarantees tight regulation without post-manufacture trimming in voltage reference designs |
| 20 Ω max zener impedance at 42 mA | Minimizes output voltage deviation during 10–100 mA load steps in switching power supply feedback paths |
| 180 W surge rating (8.3 ms) | Withstands IEC 61000-4-5 line surges without degradation in AC/DC front-end protection stages |
| Pb-free compliant (G suffix) | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-020 reflow requirements up to 260 °C |
| −65 °C to +150 °C operating range | Supports deployment in automotive engine control units and industrial motor drives with wide ambient swings |
Applications
| Switch-Mode Power Supply Feedback | Overvoltage Clamp Protection |
|---|---|
Use Scenario: Regulating output voltage in isolated flyback converters via optocoupler-coupled feedback loop. IC Role / Device Role / Timing Role: Zener reference element setting precise 62 V threshold for TL431-like error amplifier biasing. Use Value: Enables ±1% output accuracy over line/load/temperature with no external trim components required. |
Use Scenario: Protecting downstream DC bus from transient overvoltage events in 48 V telecom power systems. IC Role / Device Role / Timing Role: Fast-acting shunt clamp activated during >65 V excursions to divert surge energy to ground. Use Value: Limits bus voltage to safe levels within 100 ns, preventing damage to MOSFETs and controllers rated for 65 V max. |
| Industrial Sensor Reference | Programmable Logic Controller Input Conditioning |
Use Scenario: Providing stable excitation voltage for precision RTD or strain gauge bridges in process instrumentation. IC Role / Device Role / Timing Role: Low-drift 62 V reference source feeding precision DACs and analog front-ends. Use Value: Delivers <10 ppm/°C tempco stability over −40 to +85 °C, enabling 16-bit measurement resolution. |
Use Scenario: Level-shifting and clamping 24 V digital inputs in PLC backplanes exposed to inductive kickback. IC Role / Device Role / Timing Role: Bidirectional transient suppressor limiting input voltage to ±65 V while passing valid logic signals. Use Value: Survives repeated 100 V/100 ns spikes per IEC 61000-4-4, extending module MTBF beyond 10 years. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener voltage regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5372 | Same 62 V nominal VZ, but ±10% tolerance (vs. ±5% for 1N5372B); no guaranteed six-parameter testing | Acceptable where cost sensitivity outweighs precision; not recommended for closed-loop feedback requiring tight regulation | Select 1N5372B when ±5% VZ tolerance and full six-parameter validation are required for production-critical designs. |
| BZX85C62 | Same 62 V rating, but 1.3 W power rating (vs. 5 W); 100 Ω typical ZZT (vs. 20 Ω max for 1N5372B) | Suitable only for low-power references or signal-level clamping; cannot sustain 42 mA continuous or 400 A surge | Choose 1N5372B for high-energy clamping, sustained current regulation, or industrial-grade reliability where BZX85C62 would thermally fail. |
Compared with 1N5372 and BZX85C62, the 1N5372B offers superior power handling, tighter voltage tolerance, lower dynamic impedance, and verified surge robustness-making it the only choice for 5 W-class, mission-critical voltage regulation in harsh environments.
Availability
1N5372B is available at Aetrix Electronics and suitable for industrial power supplies, telecom surge protection circuits, and programmable logic controller input conditioning requiring stable component supply and long-term lifecycle continuity.
Supply support for 1N5372B 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, sensor, and connectivity solutions for automotive, industrial, and cloud infrastructure markets.
The 1N53 Series belongs to onsemi's Surmetic™ 40 Zener regulator family, engineered for high-reliability voltage reference and transient suppression in demanding power conversion and protection applications.
FAQ
What is the nominal zener voltage and tolerance of the 1N5372B?
The 1N5372B has a nominal zener voltage of 62 V with a guaranteed tolerance of ±5%, meaning its actual breakdown voltage falls between 58.9 V and 65.1 V when tested at 42 mA. This tight tolerance is specified per JEDEC standards and validated across production lots, making the 1N5372B suitable for precision regulation tasks where post-calibration is impractical.
What is the maximum continuous power dissipation for the 1N5372B?
The 1N5372B is rated for 5 W maximum steady-state power dissipation at a lead temperature (TL) of 25 °C with 3/8″ lead length. Derating is required above 25 °C at 40 mW/°C, resulting in zero power capability at approximately 150 °C lead temperature. This rating assumes proper PCB copper area or heatsinking to maintain thermal performance.
Does the 1N5372B support lead-free soldering processes?
Yes, the 1N5372B is offered in a Pb-free package (indicated by the "G" suffix), qualified for lead-free reflow soldering with a maximum peak temperature of 260 °C for 10 seconds at 1/16″ from the case. Its thermosetting plastic body and corrosion-resistant leads ensure reliable wetting and joint integrity under IPC-J-STD-020-compliant profiles.
What is the zener impedance of the 1N5372B and why does it matter?
The 1N5372B has a maximum zener impedance (ZZT) of 20 Ω at its test current of 42 mA. This low dynamic resistance ensures minimal output voltage variation under changing load conditions-critical for maintaining regulation accuracy in feedback loops and reference circuits where even small deviations affect system performance.
How does the 1N5372B handle surge currents, and what is its rating?
The 1N5372B is rated for a peak non-repetitive surge current of 400 A at an 8.3 ms pulse width, corresponding to 180 W of transient energy absorption. This capability is validated per industry-standard surge waveforms and enables the 1N5372B to protect downstream circuitry from lightning-induced transients and inductive switching spikes without degradation.
1N5372B Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Voltage - Zener (Nom) (Vz):
- 62 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 42 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 47.1 V
- Voltage - Forward (Vf) (Max) @ If:
- 1.2 V @ 1 A
- Operating Temperature:
- -65°C ~ 200°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N5372B FAQ
1.How can I place an order for 1N5372B through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5372B 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 1N5372B reliable?
The price and inventory of 1N5372B are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5372B is usually 5 days.
3.What payment methods are accepted for 1N5372B?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5372B transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5372B?
1N5372B orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5372B 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 1N5372B?
For technical support, including 1N5372B datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5372B requirements.
6.How does Aetrix verify that 1N5372B is sourced from the original manufacturer or authorized distributors?
All 1N5372B 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 1N5372B meets industry standards.
7.What is the process for return or replacement of 1N5372B?
All 1N5372B units undergo pre-shipment inspection (PSI). If there is an issue with 1N5372B, 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 1N5372B part is unused and in its original packaging.
Return procedure for 1N5372B:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N5372B Tags
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MMBZ5240B-7-F
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BZT52C5V6T-7
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MMSZ5231B-7-F
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BZT52C15-7-F
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BZX84C3V3LT1G
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MMSZ4682T1G
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BZT52C15S-7-F
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MM5Z5V1ST1G
onsemi
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SMAJ4744A-TP
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BZT52C3V6LP-7
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SMAZ12-13-F
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