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onsemi 1N5387BRLG
- Part No.:
- 1N5387BRLG
- Manufacturer:
- onsemi
- Category:
- Single Zener Diodes
- Package:
- T-18, Axial
- Datasheet:
-
1N5387BRLG.pdf
- Description:
- DIODE ZENER 190V 5W AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:4,782
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Product details
Overview
1N5387BRLG from onsemi is a 5 W axial-lead Zener diode with nominal zener voltage of 190 V, ±5% tolerance, maximum zener impedance of 5 Ω at 450 mA test current, and surge rating of 1850 A (8.3 ms). It operates across −65 °C to +200 °C and is used for overvoltage protection in high-voltage DC power supplies and industrial control input conditioning.
For engineers reviewing the 1N5387BRLG datasheet, pinout, applications, or equivalent options, this page delivers verified electrical parameters, thermal behavior, polarity marking, Pb-free package compliance, and real-world use context for high-voltage regulation and transient suppression.
Technical Context
This device implements a silicon-oxide passivated junction for stable reverse breakdown characteristics and low leakage. Its 190 V nominal zener voltage falls within the 82–200 V range where temperature coefficient is positive and rises with increasing voltage - specified as +0.9 mV/°C at IZT.
The 1N5387BRLG uses an axial lead, transfer-molded plastic case (Case 017AA) with cathode band polarity marking. Thermal resistance from junction-to-lead is 25 °C/W at TL = 25 °C with 3/8″ lead length, enabling direct heat sinking through leads without additional heatsinks for pulsed operation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Zener Voltage (VZ) | 180.5 V (min) to 199.5 V (max) at IZT = 450 mA - defines precise clamping threshold for high-voltage rail protection |
| Power Dissipation (PD) | 5 W steady-state @ TL = 25 °C - sets maximum continuous DC power handling before thermal derating |
| Zener Impedance (ZZT) | 5 Ω max @ IZT = 450 mA - ensures minimal voltage shift under load variation in regulation circuits |
| Surge Current (IR) | 1850 A peak @ 8.3 ms - supports single-event transient suppression in industrial power inputs |
| Leakage Current (IR) | 0.5 mA max @ VR = 144 V - guarantees low standby loss when operating near but below breakdown |
| Temperature Coefficient | +0.9 mV/°C @ IZT - quantifies voltage drift per degree rise, critical for precision reference stability |
| Junction Temp Range | −65 °C to +200 °C - enables deployment in harsh environments including motor drives and outdoor power systems |
Pinout & Package
Package: Axial-lead, transfer-molded plastic (Case 017AA), Pb-free, cathode indicated by band. Dimensions: body length 1.000–1.250 in (25.4–31.75 mm), diameter 0.130–0.145 in (3.30–3.68 mm).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / low-side connection in reverse-biased regulator | Connected to ground or lower-potential node when used as shunt regulator; carries full surge current during clamping |
| Cathode | Zener breakdown terminal / high-side connection | Marked with band; connects to protected voltage rail; sustains 190 V reverse bias and dissipates 5 W during regulation |
Key Features
| Feature | Design Value |
|---|---|
| Silicon-oxide passivated junction | Enables tight parameter distribution and long-term stability in humid or corrosive environments |
| ESD rating Class 3 (>16 kV HBM) | Protects against handling damage during assembly without requiring external ESD safeguards |
| Surge rating up to 1850 A (8.3 ms) | Handles lightning-induced transients and inductive kickback in industrial power interfaces |
| ±5% zener voltage tolerance | Reduces binning requirements and simplifies BOM management for high-voltage protection designs |
| Pb-free compliant (G suffix) | Meets RoHS Directive 2011/65/EU and JEDEC J-STD-609A Class 3 moisture sensitivity level |
Applications
| Industrial Power Supply Protection | High-Voltage Sensor Interface |
|---|---|
Use Scenario: Clamps 200–300 V DC bus surges in PLC power modules and motor drive front-ends. IC Role / Device Role / Timing Role: Shunt regulator providing overvoltage protection by diverting excess current to ground when rail exceeds 190 V. Use Value: Prevents damage to downstream DC-DC converters and microcontrollers during line transients without adding active circuitry. | Use Scenario: Conditions analog input signals from 150 V industrial sensors (e.g., current transformers, isolation amplifiers) before ADC sampling. IC Role / Device Role / Timing Role: Input clamp limiting signal swing to safe levels for 3.3 V or 5 V ADC front-ends. Use Value: Enables direct interface to high-voltage field sensors while maintaining sub-1 µA leakage at 144 V reverse bias. |
| Telecom Line Card Surge Suppression | Test Equipment High-Voltage Reference |
Use Scenario: Absorbs induced surges on 48 V–200 V telecom battery backup lines during lightning events. IC Role / Device Role / Timing Role: Standby shunt protector activated only during overvoltage events; zero quiescent current otherwise. Use Value: Survives 1850 A 8.3 ms pulses per IEC 61000-4-5 Level 4, eliminating need for multi-stage TVS arrays. | Use Scenario: Provides stable 190 V reference point in calibration fixtures for high-voltage multimeters and insulation testers. IC Role / Device Role / Timing Role: Precision voltage reference with known tempco (+0.9 mV/°C) and low dynamic impedance (5 Ω). Use Value: Delivers repeatable 190 V output with <±0.5% drift over 0–70 °C ambient when thermally stabilized. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar Zener regulation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 1N5387B | Same electrical specs and package, but SnPb lead finish (non-Pb-free) | Not suitable for RoHS-compliant production; requires exemption documentation | Select 1N5387BRLG for new designs targeting EU/China RoHS compliance; use 1N5387B only for legacy repair or exempted military programs |
| SMCJ188A | Surface-mount TVS diode, 188 V standoff, 200 V breakdown, 1500 W peak power | Designed for fast transient suppression (tp < 1 ns), not DC regulation; higher leakage (~1 µA @ 150 V) | Choose SMCJ188A for ESD/lightning surge protection where speed matters; retain 1N5387BRLG for steady-state voltage clamping and precision reference use |
Compared with 1N5387B (SnPb) and SMCJ188A (SMD TVS), the 1N5387BRLG uniquely combines axial-leaded manufacturability, Pb-free compliance, 5 W DC power handling, and 190 V regulation accuracy - making it optimal for cost-sensitive, high-reliability industrial power conditioning where solderability and long-term stability are prioritized over nanosecond response.
Availability
1N5387BRLG is available at Aetrix Electronics and suitable for industrial power supply protection, high-voltage sensor interface, and telecom line card surge suppression requiring stable component supply, traceable sourcing, and long-lifecycle support.
Supply support for 1N5387BRLG 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 delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.
The 1N53 Series belongs to onsemi's Surmetic™ 40 Zener regulator family, engineered for high-power, high-voltage shunt regulation in ruggedized industrial and infrastructure equipment where reliability under thermal and surge stress is critical.
FAQ
What is the exact zener voltage tolerance and test condition for 1N5387BRLG?
The 1N5387BRLG has a ±5% zener voltage tolerance, verified at IZT = 450 mA with 40 ±10 ms current application prior to measurement. Its nominal VZ is 190 V, with guaranteed min/max values of 180.5 V and 199.5 V respectively - all tested per JEDEC standards at TA = 25 °C ±8 °C/−2 °C.
How does thermal resistance affect 1N5387BRLG performance in PCB-mounted applications?
The 1N5387BRLG has a junction-to-lead thermal resistance (θJL) of 25 °C/W at 3/8″ lead length. When mounted with standard axial leads, this allows dissipation of its full 5 W rating only if lead temperature stays at 25 °C; above that, power must be linearly derated at 40 mW/°C. Proper lead-to-heatsink contact is essential for sustained operation.
Can 1N5387BRLG replace 1N5387B in existing designs without layout changes?
Yes - the 1N5387BRLG shares identical mechanical dimensions, pinout, and electrical specifications with 1N5387B, differing only in Pb-free plating (G suffix). No PCB or schematic modifications are required; it is a drop-in replacement compliant with RoHS and JEDEC J-STD-609A Class 3.
What is the maximum non-repetitive surge current rating for 1N5387BRLG and under what waveform conditions?
The 1N5387BRLG is rated for 1850 A peak non-repetitive surge current at 8.3 ms pulse width (standard AC half-cycle), per Figure 5 in the onsemi datasheet. This rating assumes single-event application; repetitive surges require derating based on duty cycle and thermal recovery time shown in Figure 4.
Is 1N5387BRLG suitable for precision voltage reference applications?
The 1N5387BRLG offers 190 V regulation with ±5% tolerance and +0.9 mV/°C tempco - adequate for coarse clamping and overvoltage protection, but not for precision references requiring <0.1% accuracy or <10 ppm/°C stability. For such use, consider temperature-compensated references like LM399 or buried-zener ICs instead of 1N5387BRLG.
1N5387BRLG Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- -
- Package/Case:
- T-18, Axial
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Voltage - Zener (Nom) (Vz):
- 190 V
- Tolerance:
- ±5%
- Power - Max:
- 5 W
- Impedance (Max) (Zzt):
- 450 Ohms
- Current - Reverse Leakage @ Vr:
- 500 nA @ 144 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
1N5387BRLG FAQ
1.How can I place an order for 1N5387BRLG through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N5387BRLG 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 1N5387BRLG reliable?
The price and inventory of 1N5387BRLG are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N5387BRLG is usually 5 days.
3.What payment methods are accepted for 1N5387BRLG?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N5387BRLG transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N5387BRLG?
1N5387BRLG orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N5387BRLG 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 1N5387BRLG?
For technical support, including 1N5387BRLG datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N5387BRLG requirements.
6.How does Aetrix verify that 1N5387BRLG is sourced from the original manufacturer or authorized distributors?
All 1N5387BRLG 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 1N5387BRLG meets industry standards.
7.What is the process for return or replacement of 1N5387BRLG?
All 1N5387BRLG units undergo pre-shipment inspection (PSI). If there is an issue with 1N5387BRLG, 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 1N5387BRLG part is unused and in its original packaging.
Return procedure for 1N5387BRLG:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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