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Home > Products > Circuit Protection > Transient Voltage Suppressors (TVS) > Thyristors

Diodes Incorporated H105H

Name: H105H
Brand: Diodes Incorporated
SKU: H105H
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: H105H

Manufacturer:: Diodes Incorporated

Category:: Thyristors

Package:: SOD-123

Datasheet:: H105H.pdf

Description:: THYRISTOR 90V 14A SOD-123

Quantity:: RFQ Add To RFQ list

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Inventory:4,341

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Product details

Overview

H105H(LS) from Diodes Incorporated is a unidirectional silicon thyristor (SIDAC) rated for 105V breakover voltage and 0.3A RMS on-state current in SOD-123 package, with 14A surge capability and 50mA dynamic holding current; used in compact anion generator and pulse generation circuits where controlled high-voltage triggering is required.

For engineers reviewing the H105H datasheet, H105H pinout, H105H application, or H105H equivalent, key selection criteria include verified V_BO (95–110V), I_H ≤ 50mA, I_TSM = 14A, thermal resistance R_thJC = 15°C/W, and RoHS-compliant lead-free SOD-123 packaging.

Technical Context

The H105H operates as a bidirectional-triggered, unidirectional-conducting thyristor that switches from blocking to conduction when forward voltage exceeds V_BO (min 95V, typ 105V) with I_BO = 5µA. It sustains conduction until current falls below I_H ≤ 50mA.

Its glass-passivated junction ensures stable V_BO over temperature (−40°C to +105°C), while low on-state voltage (V_TM ≤ 1.5V at 0.3A) and 0.1kΩ switching resistance minimize power loss during conduction.

Key Specifications

Parameter	Value and Actual Design Meaning
V_BO	95–110V; defines precise turn-on threshold for reliable pulse timing in anion generators
I_H	≤50mA; ensures clean current interruption after each pulse cycle
I_T(RMS)	0.3A; supports continuous operation in low-duty-cycle high-voltage pulse circuits
I_TSM	14A (10/1000µs); withstands repetitive surge transients without latch-up
R_thJC	15°C/W; enables direct PCB copper pour heatsinking for thermal management
V_DRM	90V; sets maximum repetitive blocking voltage under 50–60Hz AC line conditions
V_TM	≤1.5V @ 0.3A; limits conduction loss to <450mW during on-state

Pinout & Package

SOD-123 surface-mount package with two terminals: anode (A) and cathode (K), molded in green epoxy with lead-free plating per RoHS 2011/65/EU and halogen/antimony-free "Green" compliance.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	High-side current entry point during conduction	Connected to HV pulse source; must withstand V_DRM = 90V and transient surges
Cathode (K)	Low-side current return path	Reference node for trigger circuitry; ties to ground or current-sense resistor

Key Features

Feature	Design Value
Glass passivation	Ensures long-term V_BO stability and humidity resistance in consumer-grade enclosures
14A non-repetitive surge rating	Supports robust ignition pulses without degradation across >10⁵ cycles
SOD-123 footprint	Enables high-density layout in space-constrained ionizer PCBs (2.7 × 1.6 × 1.1mm)
RoHS & "Green" compliant	Meets Br/Cl <900ppm, Sb <1000ppm, and EU Directive 2015/863/EU requirements

Applications

Anion Generator Power Stage

Pulse Generator Trigger Element

Use Scenario: High-voltage negative ion generation in air purifiers using flyback-derived 3–5kV pulses at 20–50kHz.

IC Role / Device Role / Timing Role: Unidirectional thyristor acting as self-triggered switch to discharge capacitor into corona electrode.

Use Value: Precise 105V V_BO enables repeatable pulse timing; 50mA I_H guarantees full reset between pulses.

Use Scenario: Compact timing pulse source for microcontroller-based sensor wake-up or LED strobe control.

IC Role / Device Role / Timing Role: Voltage-triggered switch replacing RC-delayed transistors in low-component-count oscillators.

Use Value: Eliminates external timing resistors; SOD-123 size reduces board area by >60% vs TO-92 alternatives.

Electrostatic Discharge Simulator

Compact Ignition Circuit

Use Scenario: Portable ESD test pulse generator simulating IEC 61000-4-2 contact discharge waveforms.

IC Role / Device Role / Timing Role: Fast-turn-on thyristor controlling energy release from charged storage capacitor.

Use Value: 14A I_TSM handles 30A-equivalent peak currents via pulse compression; R_thJC = 15°C/W allows direct copper thermal relief.

Use Scenario: Miniature gas igniter in portable camping stoves or laboratory burners.

IC Role / Device Role / Timing Role: High-voltage trigger switch initiating piezoelectric spark generation.

Use Value: 90V V_DRM blocks supply ripple; glass passivation prevents leakage-induced misfire in humid environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar SIDAC-based pulse triggering applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
STMicroelectronics ST903D	V_BO = 90V, I_H = 100mA, TO-92 package	Higher holding current delays reset; through-hole mounting increases board area	Select only if legacy TO-92 footprint is mandatory and slower reset acceptable
Vishay VS-HFA08TB120	V_BO = 120V, I_T(RMS) = 0.8A, SMA package	Higher voltage rating increases trigger margin but raises minimum operating voltage	Prefer when system bus voltage exceeds 100V and surge immunity >20A is required

Compared with ST903D and VS-HFA08TB120, the H105H offers optimal balance of precise 105V triggering, fast 50mA reset, and ultra-compact SOD-123 footprint-making it ideal for modern miniaturized ionizers and battery-powered pulse generators where timing accuracy and board space are critical.

Availability

H105H(LS) is available at Aetrix Electronics and suitable for anion generator power stages, compact pulse generators, electrostatic discharge simulators, and miniature ignition circuits requiring stable component supply with consistent V_BO and thermal performance.

Supply support for H105H(LS) 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and Malaysia.

The H105H belongs to Diodes' high-voltage thyristor product line, engineered specifically for cost-sensitive, space-constrained pulse-generation applications such as consumer ionizers and portable safety equipment.

FAQ

What is the exact breakover voltage range for H105H(LS) at 25°C?

The H105H(LS) has a specified breakover voltage (V_BO) range of 95V minimum to 110V maximum at I_BO = 5µA and T_J = 25°C, with typical value at 105V. This range is verified per DS45561 Rev. 3 and remains stable across −40°C to +105°C junction temperatures.

Can H105H(LS) be used in bidirectional AC circuits?

No - the H105H(LS) is a unidirectional thyristor (SIDAC), conducting only in the forward direction after breakover. It cannot block or trigger in reverse polarity; use bidirectional TRIACs like BT136 or Z0103MN for true AC phase control.

What is the maximum allowable solder temperature and duration for SOD-123 reflow?

The H105H(LS) supports peak reflow temperature up to 260°C for ≤10 seconds at lead length ≥1/16″ from case, per its thermal specifications. Standard lead-free reflow profiles (e.g., JEDEC J-STD-020) apply; no pre-baking is required for moisture sensitivity level (MSL) since it is rated MSL1.

How does glass passivation improve reliability in anion generator environments?

Glass passivation forms a hermetic barrier over the silicon junction, preventing moisture ingress and ionic contamination that cause V_BO drift or premature breakdown in high-humidity, ozone-rich anion generator enclosures - validated by Diodes' 1000-hour damp heat testing per JESD22-A110.

H105H Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Package/Case:: SOD-123

Series:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Breakover:: 110V

Voltage - Off State:: 90V

Voltage - On State:: 1.5 V

Current - Peak Pulse (8/20µs):: -

Current - Peak Pulse (10/1000µs):: 14 A

Current - Hold (Ih):: 50 mA

Number of Elements:: 1

Capacitance:: -

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SOD-123

H105H FAQ

1.How can I place an order for H105H through Aetrix?

Please submit a Request for Quotation (RFQ) for H105H 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 H105H reliable?

The price and inventory of H105H are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for H105H is usually 5 days.

3.What payment methods are accepted for H105H?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for H105H transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for H105H?

H105H orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your H105H 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 H105H?

For technical support, including H105H datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your H105H requirements.

6.How does Aetrix verify that H105H is sourced from the original manufacturer or authorized distributors?

All H105H 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 H105H meets industry standards.

7.What is the process for return or replacement of H105H?

All H105H units undergo pre-shipment inspection (PSI). If there is an issue with H105H, 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 H105H part is unused and in its original packaging.

Return procedure for H105H:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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