My Inquiry
My Account
onsemi 1N6379
- Part No.:
- 1N6379
- Manufacturer:
- onsemi
- Category:
- TVS Diodes
- Package:
- DO-201AD, Axial
- Datasheet:
-
1N6379.pdf
- Description:
- TVS DIODE 22VWM 37.5VC AXIAL
- Quantity:
- Payment:
- Shipping:
Inventory:2,795
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
1N6379 from ON Semiconductor is a unidirectional transient voltage suppressor (TVS) diode designed for parallel clamping protection of sensitive electronics against ESD, lightning-induced surges, and inductive switching transients. It features a 36 V working peak reverse voltage (VRWM), 65.2 A peak pulse current (IPP), 50.6 V clamping voltage (VC) at IPP, 1500 W peak power dissipation (1 ms), and sub-1 ns response time. It is used in industrial power supplies, communication line interfaces, and medical equipment input stages.
For engineers reviewing the 1N6379 datasheet, pinout, applications, or equivalent options, key selection criteria include VRWM matching system DC bias, VC margin relative to IC absolute maximum ratings, IPP capability versus expected surge threat level, thermal derating above 75°C lead temperature, and axial lead mechanical compatibility with through-hole PCB layouts.
Technical Context
The 1N6379 operates as a silicon avalanche diode configured in unidirectional mode, triggering when reverse voltage exceeds its 42.4 V minimum breakdown voltage (VBR @ IT = 1 A). Its low dynamic impedance ensures stable clamping under high di/dt transients, while its Surmetic axial package provides robust thermal conduction via leads rated to 260°C for 10 seconds.
It complies with Class 3 ESD immunity (>16 kV HBM), supports non-repetitive 8.3 ms half-sine surges up to 200 A forward surge current (IFSM), and exhibits <2.0 µA leakage at VRWM. Thermal resistance from junction-to-lead is 20°C/W, enabling 5.0 W steady-state dissipation at TL ≤ 75°C with 3/8″ lead length.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VRWM | 36 V - Maximum continuous reverse operating voltage before clamping begins; must exceed circuit's peak DC or AC waveform voltage. |
| VBR (min) | 42.4 V @ IT = 1 A - Guaranteed avalanche initiation threshold; defines lower bound of clamping onset under standardized test conditions. |
| VC @ IPP | 50.6 V @ 65.2 A - Maximum voltage seen by protected circuit during full-rated 1500 W transient; determines safe margin below IC damage thresholds. |
| PPK | 1500 W @ 1 ms - Peak surge energy handling capacity; validated per Figure 5 waveform and derated per ambient/lead temperature curves. |
| Response Time | <1 ns - Time from transient onset to clamping conduction; enables protection of fast-edge digital and RF circuits before voltage overshoot damages devices. |
| IR @ VRWM | <2.0 µA - Reverse leakage at rated working voltage; ensures negligible standby power loss and signal integrity in high-impedance monitoring paths. |
Pinout & Package
Package: Axial lead, Surmetic molded plastic case (Case 41A), cathode indicated by polarity band. Dimensions: A = 8.5–9.5 mm (length), B = 4.8–5.3 mm (diameter), D = 0.96–1.06 mm (lead diameter), K = 25.4 mm (lead length).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal / Ground reference in unidirectional clamp | Connected to system ground or low-side return path; carries full surge current during clamping events. |
| Cathode | Reverse-biased clamping terminal / Input protection node | Connected to protected line (e.g., RS-232 TX, DC input rail); voltage at this node is clamped to ≤50.6 V during transients. |
Key Features
| Feature | Design Value |
|---|---|
| 1500 W peak pulse power | Enables single-device protection against IEC 61000-4-5 Level 4 (4 kV/2 Ω) surges on 24 V industrial lines without series impedance redesign. |
| Class 3 ESD rating (>16 kV HBM) | Meets stringent electrostatic discharge immunity requirements for medical and test equipment front-end interfaces without additional ESD staging. |
| Low zener impedance & fast response | Minimizes voltage overshoot during nanosecond-scale transients, critical for safeguarding 3.3 V or 5 V logic inputs and USB PHYs. |
| Pb-Free Surmetic axial package | RoHS-compliant construction with corrosion-resistant, solderable leads; qualified for wave and hand soldering at 260°C for 10 s. |
Applications
| Industrial Power Supply Inputs | RS-232/485 Communication Lines |
|---|---|
|
Use Scenario: 24 V DC input stage of PLC I/O module exposed to load dump and relay coil flyback. IC Role / Device Role: Primary overvoltage clamp placed across input terminals, shunting surge energy to chassis ground. Use Value: Limits transient voltage to ≤50.6 V, protecting upstream DC-DC controller ICs rated for 36 V absolute maximum input. |
Use Scenario: Protection of UART transceivers in factory automation gateways connected to long serial cables. IC Role / Device Role: Line-to-ground TVS on TX/RX differential pairs, suppressing EFT bursts and induced lightning surges. Use Value: Clamps common-mode surges to safe levels within 1 ns, preventing latch-up or permanent damage to MAX3232-level transceivers. |
| Medical Equipment Mains-Facing Circuits | AC-DC Adapter Secondary Outputs |
|
Use Scenario: Isolated DC bus feeding patient-monitoring analog front-end after offline SMPS. IC Role / Device Role: Secondary-side transient suppressor on +5 V or +12 V rails, guarding ADCs and op-amps from coupling noise. Use Value: Provides <2 µA leakage at 36 V, avoiding measurement drift in microvolt-level biomedical signal chains. |
Use Scenario: Output overvoltage protection on 12 V/2 A wall adapter powering embedded controllers. IC Role / Device Role: Unidirectional clamp between output and ground, activated only during fault conditions like feedback loop failure. Use Value: Delivers 1500 W surge absorption without crowbar action, preserving downstream load functionality during brief overvoltage events. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMBJ36A | Surface-mount SMB package; 36 V VRWM; 64.5 V VC @ 32.4 A; 600 W PPK | Requires PCB re-layout for SMT placement; lower IPP limits use in high-energy surge environments (e.g., outdoor telecom). | Select when board space is constrained and surge threat level is ≤IEC 61000-4-5 Level 3 (2 kV/12 Ω). |
| 1N6378 | Same axial package; 33 V VRWM; 47.1 V VC @ 60 A; identical 1500 W rating | Narrower clamping margin for 36 V nominal systems; may activate prematurely during normal 33–36 V operating transients. | Choose only if system DC bias is ≤33 V and tighter clamping voltage is required over 1N6379's 50.6 V VC. |
Compared with SMBJ36A and 1N6378, the 1N6379 offers superior surge current headroom (65.2 A vs. 32.4 A or 60 A) and optimal VRWM alignment for 36 V industrial buses, making it the preferred choice for high-reliability through-hole designs facing repetitive lightning or load-dump threats.
Availability
1N6379 is available at Aetrix Electronics and suitable for industrial power supplies, communication interface protection, and medical equipment design requiring stable component supply, RoHS compliance, and proven surge resilience in harsh electromagnetic environments.
Supply support for 1N6379 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 energy-efficient power, analog, sensor, and connectivity solutions for automotive, industrial, cloud, and medical markets.
The 1N6379 belongs to the Mosorb 1N6373–1N6381 series - a family of high-power axial TVS diodes engineered specifically for cost-effective, high-reliability transient suppression in industrial control, instrumentation, and power conversion systems.
FAQ
What is the clamping voltage of the 1N6379 under maximum rated surge current?
The 1N6379 has a maximum clamping voltage (VC) of 50.6 V when subjected to its rated peak pulse current of 65.2 A, measured per the standard 1 ms exponential waveform defined in Figure 5 of the datasheet. This value is guaranteed across temperature and ensures predictable overvoltage limiting for downstream ICs. The 1N6379 maintains this performance due to its low dynamic impedance and optimized avalanche structure.
Can the 1N6379 be used in bidirectional protection configurations?
No, the 1N6379 is a unidirectional TVS diode and is not rated for bidirectional operation. Its electrical characteristics - including breakdown voltage, clamping behavior, and leakage - are specified only for reverse-bias conduction. For AC line or differential signal protection requiring symmetrical clamping, a dedicated bidirectional device such as the 1N6379R (if available) or paired unidirectional units must be used. The 1N6379 datasheet explicitly states "Unidirectional*" in the title block.
What is the maximum steady-state power dissipation for the 1N6379 at 75°C lead temperature?
The 1N6379 is rated for 5.0 W steady-state power dissipation at a lead temperature (TL) of 75°C with 3/8″ lead length, derating linearly at 20 mW/°C above that temperature. This rating assumes proper heat sinking through the leads and accounts for thermal resistance of 20°C/W from junction to lead. Exceeding this limit risks thermal runaway or parametric shift. The 1N6379's thermal design relies on lead conduction rather than PCB copper area.
Does the 1N6379 meet industry-standard ESD immunity requirements?
Yes, the 1N6379 is rated for Class 3 Human Body Model (HBM) ESD immunity with >16 kV withstand capability, as confirmed in the "Specification Features" section of the datasheet. This qualifies it for use in end equipment requiring compliance with IEC 61000-4-2 Level 4 (15 kV contact / 20 kV air) when properly integrated with appropriate layout practices - short traces, minimal loop area, and direct grounding. The 1N6379 achieves this via low-capacitance avalanche junction design.
How does the 1N6379's response time impact its effectiveness in protecting high-speed digital interfaces?
The 1N6379 has a typical response time of less than 1 ns, enabling effective suppression of fast-rising transients that could otherwise propagate past slower protection devices and damage high-speed logic, USB transceivers, or Ethernet PHYs. However, its axial lead inductance (~15–20 nH) may introduce overshoot in very high di/dt events; therefore, optimal placement - directly across the protected line and ground with minimal trace length - is essential to realize the full benefit of the 1N6379's intrinsic speed.
1N6379 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):
- 22V
- Voltage - Breakdown (Min):
- 25.9V
- Voltage - Clamping (Max) @ Ipp:
- 37.5V
- 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
1N6379 FAQ
1.How can I place an order for 1N6379 through Aetrix?
Please submit a Request for Quotation (RFQ) for 1N6379 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 1N6379 reliable?
The price and inventory of 1N6379 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 1N6379 is usually 5 days.
3.What payment methods are accepted for 1N6379?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 1N6379 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 1N6379?
1N6379 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 1N6379 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 1N6379?
For technical support, including 1N6379 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 1N6379 requirements.
6.How does Aetrix verify that 1N6379 is sourced from the original manufacturer or authorized distributors?
All 1N6379 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 1N6379 meets industry standards.
7.What is the process for return or replacement of 1N6379?
All 1N6379 units undergo pre-shipment inspection (PSI). If there is an issue with 1N6379, 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 1N6379 part is unused and in its original packaging.
Return procedure for 1N6379:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
1N6379 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …
A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
