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Home > Products > Discrete Semiconductor Products > Thyristors > SCRs

Diodes Incorporated SD09A160E

Name: SD09A160E
Brand: Diodes Incorporated
SKU: SD09A160E
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SD09A160E

Manufacturer:: Diodes Incorporated

Category:: SCRs

Package:: -

Datasheet:: SD09A160E.pdf

Description:: THYRISTOR DO-41 T&R 5K

Quantity:: RFQ Add To RFQ list

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Inventory:5,000

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Product details

Overview

SD09A160E from Lite-On is a silicon bidirectional thyristor (SIDAC) rated for 160 V peak repetitive off-state voltage, 0.9 A RMS on-state current, and 120 A/μs critical rate of rise of on-state current; it triggers SCRs and triacs in high-voltage ignitor circuits for high-pressure sodium vapor lamps and strobe flashers.

For engineers reviewing the SD09A160E datasheet, SD09A160E pinout, SD09A160E application, or SD09A160E equivalent, key selection criteria include breakover voltage tolerance (150–170 V), dynamic holding current ≤100 mA, di/dt capability, DO-41 package thermal resistance (40 °C/W), and UL recognition (E219635).

Technical Context

The SD09A160E operates as a two-terminal, bidirectional, negative-resistance switching device without gate control; conduction initiates when applied voltage exceeds its symmetric breakover threshold (V_BO = 150–170 V) under specified I_BO = 35 µA test conditions.

It sustains conduction until current falls below dynamic holding current (I_H ≤ 100 mA) and exhibits low on-state voltage (V_TM ≤ 1.5 V at 1 A peak) with high surge tolerance (I_TSM = ±4.0 A, 60 Hz sine, one cycle).

Key Specifications

Parameter	Value and Actual Design Meaning
V_DRM/V_RRM	±160 V - Peak repetitive blocking voltage in either direction; defines maximum AC line or pulse voltage before uncontrolled conduction.
I_T(RMS)	±0.9 A - Continuous RMS current handling capacity at T_L = 80 °C with 3/8″ lead length; sets thermal derating baseline for lamp ignitor duty cycles.
V_BO	150–170 V - Symmetric breakover voltage range at I_BO = 35 µA; determines precise trigger point for SCR/triac gate firing circuits.
I_H	≤100 mA - Maximum current below which device reverts to off-state; ensures clean turn-off in pulsed regulator and flasher timing loops.
di/dt	120 A/μs - Minimum critical rate of rise of on-state current; enables reliable triggering even with fast-rising pulses in high-voltage pulse generators.
R_thJL	40 °C/W - Junction-to-lead thermal resistance; supports thermal design with standard DO-41 PCB mounting and lead heatsinking.

Pinout & Package

Package: JEDEC DO-41 molded plastic case with matte tin–plated leads; RoHS-compliant; weight 0.34 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode (A)	Primary current terminal (bidirectional)	Functions identically as cathode under reverse polarity; no polarity marking required for AC-trigger applications.
Cathode (K)	Primary current terminal (bidirectional)	Electrically interchangeable with Anode; terminals are symmetrical and non-polarized per SIDAC architecture.

Key Features

Feature	Design Value
High di/dt capability	120 A/μs - Enables robust triggering of power semiconductors under fast-rising, high-voltage transients without false turn-on.
Glass-passivated junction	Ensures stable V_BO over temperature and lifetime; eliminates parameter drift in outdoor lighting and industrial pulse environments.
UL Recognition	File # E219635 - Validates safety compliance for use in certified high-intensity discharge (HID) lamp ballasts and commercial strobes.
Symmetric bidirectional switching	No gate or polarity dependency - simplifies circuit layout in AC-coupled ignitors and eliminates need for back-to-back device pairing.

Applications

High-Pressure Sodium (HPS) Lamp Ignitor

Strobe Light Pulse Generator

Use Scenario: Initiates arc strike in HPS lamps by delivering high-voltage pulse across lamp electrodes during warm-up phase.

IC Role / Device Role / Timing Role: Bidirectional voltage-triggered switch that fires only when line voltage exceeds 150–170 V, synchronizing with AC zero-crossing.

Use Value: Eliminates external timing capacitors and provides repeatable, temperature-stable breakover for consistent lamp ignition across -40 to +125 °C.

Use Scenario: Generates sharp, high-voltage trigger pulses for xenon flash tubes in emergency beacons and studio lighting.

IC Role / Device Role / Timing Role: Self-triggering pulse former that conducts when capacitor-charged voltage reaches V_BO, then clamps residual energy via low V_TM.

Use Value: Delivers sub-microsecond edge pulses with 120 A/μs di/dt support, enabling precise flash timing without external gate drivers.

SCR Gate Trigger Circuit

High-Voltage Regulator Snubber

Use Scenario: Provides isolated, voltage-synchronized gate drive to main SCR in phase-controlled AC dimmers and motor controllers.

IC Role / Device Role / Timing Role: Two-terminal AC switch that replaces optocoupler + Zener network; triggers SCR when mains voltage crosses V_BO.

Use Value: Reduces BOM count and improves timing accuracy versus RC-triggered designs, especially under varying line voltage conditions.

Use Scenario: Absorbs transient overvoltage spikes across regulation transistors in high-voltage linear regulators for medical imaging supplies.

IC Role / Device Role / Timing Role: Voltage-clamping protector that turns on only above 160 V, diverting surge current away from sensitive pass devices.

Use Value: Offers faster response than MOVs and tighter voltage tolerance than Zeners, improving regulator reliability under lightning-induced surges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar bidirectional thyristor switching applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor 2N6027	Lower V_BO (32–40 V), lower I_T(RMS) (0.15 A), TO-92 package	Designed for low-voltage relaxation oscillators, not line-voltage ignitors	Not suitable for 160 V AC applications; requires redesign of trigger network and thermal management.
Vishay S3016L	Higher I_T(RMS) (1.6 A), same V_DRM (160 V), TO-220AB package	Includes built-in heat sink tab; intended for higher-power continuous switching	Overqualified for pulse-only ignitor use; adds cost and board space without functional benefit in flash/strobe roles.

Compared with SD09A160E, the 2N6027 lacks sufficient voltage rating and surge margin for HID lamp circuits, while the S3016L offers excess current capacity and thermal mass-neither matches the SD09A160E's optimized balance of 160 V blocking, 120 A/μs di/dt, and DO-41 form factor for compact, high-reliability ignitors.

Availability

SD09A160E is available at Aetrix Electronics and suitable for high-pressure sodium vapor lighting, strobe flashers, and SCR gate trigger circuits requiring stable component supply and UL-recognized safety compliance.

Supply support for SD09A160E 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

Lite-On Technology Corporation is a Taiwan-based semiconductor manufacturer specializing in optoelectronics, discrete power devices, and analog ICs, with global manufacturing and quality certifications.

The SD09A-E series targets high-reliability AC-trigger applications in lighting, pulse generation, and power control, emphasizing glass-passivated stability, high di/dt immunity, and UL safety recognition.

FAQ

What is the minimum and maximum breakover voltage for SD09A160E?

The SD09A160E has a specified breakover voltage (V_BO) range of 150 V (minimum) to 170 V (maximum) when tested at I_BO = 35 µA. This symmetric, bidirectional threshold is guaranteed across the full operating junction temperature range (-40 to +125 °C) and defines the precise voltage at which the device transitions from blocking to conduction.

Can SD09A160E replace a DIAC in standard lamp ignitor circuits?

Yes - the SD09A160E is functionally compatible with standard DIACs (e.g., DB3) in AC-trigger applications, but offers higher V_DRM (±160 V vs. typical ±30 V), higher di/dt (120 A/μs), and UL recognition. Its 150–170 V V_BO makes it ideal for 120/240 VAC systems where standard DIACs would fail catastrophically.

Is SD09A160E lead-free and RoHS compliant?

Yes - the SD09A160E uses matte tin–plated leads and conforms to RoHS Directive 2002/95/EC. Its DO-41 package is fully lead-free, with no exemptions claimed, and meets JEDEC moisture sensitivity level (MSL) requirements for standard surface-mount and through-hole reflow processes.

What is the maximum allowable junction temperature during surge operation?

The SD09A160E is rated for a maximum junction temperature of +125 °C during surge events, including its 60 Hz, one-cycle I_TSM = ±4.0 A rating. Thermal design must ensure that transient power dissipation does not exceed this limit, particularly under repeated pulsing in flasher or ignitor duty cycles.

SD09A160E Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: -

Packaging:: Tape & Reel (TR)

Product Status:: Active

Voltage - Off State:: -

Voltage - Gate Trigger (Vgt) (Max):: -

Current - Gate Trigger (Igt) (Max):: -

Voltage - On State (Vtm) (Max):: -

Current - On State (It (AV)) (Max):: -

Current - On State (It (RMS)) (Max):: -

Current - Hold (Ih) (Max):: -

Current - Off State (Max):: -

Current - Non Rep. Surge 50, 60Hz (Itsm):: -

SCR Type:: -

Operating Temperature:: -

Grade:: -

Qualification:: -

Mounting Type:: -

Supplier Device Package:: -

SD09A160E FAQ

1.How can I place an order for SD09A160E through Aetrix?

Please submit a Request for Quotation (RFQ) for SD09A160E 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 SD09A160E reliable?

The price and inventory of SD09A160E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SD09A160E is usually 5 days.

3.What payment methods are accepted for SD09A160E?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SD09A160E transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SD09A160E?

SD09A160E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SD09A160E 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 SD09A160E?

For technical support, including SD09A160E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SD09A160E requirements.

6.How does Aetrix verify that SD09A160E is sourced from the original manufacturer or authorized distributors?

All SD09A160E 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 SD09A160E meets industry standards.

7.What is the process for return or replacement of SD09A160E?

All SD09A160E units undergo pre-shipment inspection (PSI). If there is an issue with SD09A160E, 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 SD09A160E part is unused and in its original packaging.

Return procedure for SD09A160E:

1.Submit a request within 90 days.

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

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