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onsemi 1N6373
- Part No.:
- 1N6373
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6373.pdf
- Description:
- TVS DIODE 5VWM 9.4VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:5,748
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Product details
Overview
1N6373 from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode in axial lead Surmetic plastic package (Case 41A), rated for 1500 W peak pulse power at 1 ms, 5.0 V working peak reverse voltage (VRWM), and clamping voltage of 9.4 V at 160 A peak pulse current. It protects CMOS/MOS/bipolar ICs in power supplies and industrial controls against ESD and lightning-induced transients.
For engineers reviewing the 1N6373 datasheet, pinout, applications, or equivalent options, this page delivers verified electrical specs, clamping behavior, thermal derating curves, Pb-free compliance, and real-world layout guidance for surge protection design.
Technical Context
The 1N6373 operates as a silicon avalanche diode with fast turn-on (<1 ns response time) and low dynamic impedance, enabling effective clamping of high-energy transients before downstream circuitry sustains damage. Its unidirectional configuration allows integration in DC-biased lines where reverse conduction must be blocked during normal operation.
Designed for non-repetitive surge events per IEC 61000-4-5, it supports peak pulse currents up to 160 A with clamping voltage tightly controlled at 9.4 V, while maintaining <300 µA leakage at VRWM and ESD rating >16 kV (HBM). Thermal resistance from junction-to-lead is 20 °C/W, supporting steady-state dissipation of 5.0 W at TL ≤ 75°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Peak Pulse Power | 1500 W @ 1 ms - withstands high-energy surges without failure in telecom or industrial power rails |
| Working Peak Reverse Voltage (VRWM) | 5.0 V - sets maximum continuous operating voltage before clamping activates |
| Clamping Voltage (VC) | 9.4 V @ IPP = 160 A - limits transient voltage seen by protected ICs to safe levels |
| Breakdown Voltage (VBR) | 6.0–7.5 V @ IT = 1.0 A - defines precise avalanche onset threshold for predictable protection timing |
| Leakage Current (IR) | <300 µA @ VRWM - ensures minimal standby power loss and signal integrity in low-power circuits |
| Response Time | <1 ns - enables suppression before transient energy couples into sensitive nodes |
| ESD Rating | Class 3 (>16 kV HBM) - meets stringent electrostatic discharge immunity requirements |
Pinout & Package
1N6373 is housed in an axial-leaded Surmetic plastic package (Case 41A), with cathode indicated by a polarity band. Leads are solderable at 260°C for 10 seconds at 1/16″ from case. Dimensions: A = 8.5–9.5 mm, B = 4.8–5.3 mm, D = 0.96–1.06 mm, K = 25.4 mm max, P = ≤1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to ground or low-side reference in unidirectional TVS configuration |
| Cathode | Avalanche clamping terminal | Connected to protected line; conducts during overvoltage to clamp voltage to VC |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse rating | Supports robust protection against IEC 61000-4-5 Level 4 surges (4 kV/2 Ω) on 5 V rails |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes overvoltage stress on downstream components during avalanche conduction |
| Pb-Free Surmetic package | Complies with RoHS Directive 2011/65/EU and supports lead-free reflow assembly |
| Fast response <1 ns | Reduces overshoot risk in high-speed digital and analog signal paths |
| Controlled VBR tolerance (6.0–7.5 V) | Enables precise coordination with system overvoltage thresholds and margin analysis |
Applications
| Industrial Power Supply Protection | Medical Equipment Input Stage |
|---|---|
Use Scenario: 5 V DC input rail of programmable logic controller (PLC) exposed to load dump and inductive switching transients. IC Role / Device Role / Timing Role: Unidirectional TVS placed across input terminals to shunt surge energy to ground before reaching DC-DC converter ICs. Use Value: Clamps transients to ≤9.4 V, preserving 5 V rail integrity and preventing latch-up in downstream regulators and microcontrollers. | Use Scenario: Front-end power entry of diagnostic imaging device subject to ESD events per IEC 61000-4-2. IC Role / Device Role / Timing Role: Primary transient suppressor on AC/DC adapter output, coordinated with secondary filtering. Use Value: Withstands >16 kV HBM ESD strikes and limits voltage rise to safe levels for isolated ADCs and precision op-amps. |
| Communications Interface Protection | Automotive Body Control Module |
Use Scenario: RS-232 or CAN bus power line in networked building automation system. IC Role / Device Role / Timing Role: Standoff protection device on VCC line feeding level translators and interface ICs. Use Value: Prevents false triggering and latch-up in UART transceivers during cable discharge events due to sub-1 ns response. | Use Scenario: 5 V supply rail of BCM microcontroller unit handling door lock and window control signals. IC Role / Device Role / Timing Role: First-line surge protector on fused battery feed, upstream of LDO regulators. Use Value: Absorbs load dump energy (per ISO 7637-2 Pulse 5a) without degradation, ensuring MCU reset immunity. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ5.0A | Surface-mount SMB package; same VRWM (5.0 V), slightly higher VC (9.6 V @ 152 A); lower peak power (600 W) | Requires PCB redesign for SMT placement; better suited for space-constrained consumer electronics | Select when board area is limited and surge threat level is moderate (IEC 61000-4-5 Level 2) |
| 1N6374 | Same axial package and construction; higher VRWM (8.0 V), higher VC (15 V @ 100 A); 1500 W rating retained | Used where nominal operating voltage exceeds 5.5 V, e.g., 8 V logic rails or dual-supply systems | Select when protecting circuits with higher DC bias; not interchangeable without verifying system voltage margins |
Compared with SMBJ5.0A and 1N6374, the 1N6373 offers optimal clamping headroom for 5 V systems with legacy through-hole assembly, delivering highest surge energy absorption in its voltage class without requiring layout changes.
Availability
1N6373 is available at Aetrix Electronics and suitable for industrial power supplies, medical equipment front-ends, communications interface protection, and automotive body control modules requiring stable component supply and long-term obsolescence management.
Supply support for 1N6373 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 (now onsemi) is a global semiconductor supplier specializing in power management, analog, sensors, and connectivity solutions for automotive, industrial, cloud, and IoT applications.
The 1N6373 belongs to the Mosorb TVS family, engineered specifically for high-reliability transient suppression in harsh electromagnetic environments where fast response, repeatable clamping, and robust surge handling are critical.
FAQ
What is the maximum clamping voltage of the 1N6373 under surge conditions?
The 1N6373 has a maximum clamping voltage (VC) of 9.4 V when subjected to its rated peak pulse current of 160 A per the 1 ms exponential waveform defined in Figure 5 of the datasheet. This value is measured under standardized test conditions and represents the upper limit of voltage imposed on protected circuitry during worst-case transient events.
Is the 1N6373 compatible with lead-free soldering processes?
Yes, the 1N6373 is offered in a Pb-Free Surmetic axial package (indicated by the "G" suffix), qualified for lead-free reflow and wave soldering. The maximum lead temperature is specified at 260°C for 10 seconds at 1/16″ from the case, aligning with IPC/JEDEC J-STD-020 moisture sensitivity and thermal profile guidelines.
How does the 1N6373 differ from the 1N6374 in terms of electrical performance?
The 1N6373 and 1N6374 share identical construction and surge capability but differ in voltage ratings: the 1N6373 has VRWM = 5.0 V and VBR = 6.0–7.5 V, while the 1N6374 has VRWM = 8.0 V and VBR = 9.4–11.5 V. Their clamping voltages scale accordingly (9.4 V vs. 15 V), making them non-interchangeable without verifying system operating voltage margins.
Can the 1N6373 be used in bidirectional signal lines?
No, the 1N6373 is a unidirectional TVS diode and must not be used on AC-coupled or bidirectional data lines such as USB or RS-485 without external biasing. For such applications, a bidirectional variant like 1N6373R (if available) or dedicated bidirectional TVS arrays should be selected instead.
What is the thermal resistance specification for the 1N6373, and how does it affect power handling?
The 1N6373 has a junction-to-lead thermal resistance (RJL) of 20 °C/W. This means that at a steady-state power dissipation of 5.0 W (its rated PD at TL ≤ 75°C), the junction temperature rises 100°C above lead temperature. Proper heatsinking via short, wide leads is essential to maintain reliability during repeated or sustained transient events.
1N6373 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Package/Case:
- DO-201AD, Axial
- Series:
- Mosorb™
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 5V
- Voltage - Breakdown (Min):
- 6V
- Voltage - Clamping (Max) @ Ipp:
- 9.4V
- Current - Peak Pulse (10/1000µs):
- -
- Power - Peak Pulse:
- 1500W (1.5kW)
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 175°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- Axial
1N6373 FAQ
1.How can I place an order for 1N6373 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6373 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 1N6373 reliable?
The price and inventory of 1N6373 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6373 is usually 5 days.
3.What payment methods are accepted for 1N6373?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6373 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6373?
1N6373 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6373 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 1N6373?
For technical support, including 1N6373 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6373 requirements.
6.How does Aetrix verify that 1N6373 is sourced from the original manufacturer or authorized distributors?
All 1N6373 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 1N6373 meets industry standards.
7.What is the process for return or replacement of 1N6373?
All 1N6373 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6373, 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 1N6373 part is unused and in its original packaging.
Return procedure for 1N6373:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6373 Tags
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onsemi
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Diodes Incorporated
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Diodes Incorporated
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Nexperia USA Inc.
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Toshiba Semiconductor and Storage
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