DB3 DB3 is a 150mW bi-directional trigger diode (DIAC) with a breakover voltage of 28V min, 32V typ, 36V max. It is housed in a DO-35 axial lead package and rated for 2A repetitive peak forward current.

Mfr Part #:

DB3

DB3 is a 150mW bi-directional trigger diode (DIAC) with a breakover voltage of 28V min, 32V typ, 36V max. It is housed in a DO-35 axial lead package and rated for 2A repetitive peak forward current.

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DB3 Description

Short technical summary and product information.

The DB3 is a 150mW bi-directional trigger diode (DIAC) manufactured by STMicroelectronics. It features a breakover voltage (VBO) of 28V minimum, 32V typical, and 36V maximum when tested with a 22nF capacitor. The breakover current (IBO) is 100µA maximum, and leakage current is 10µA maximum at half the maximum breakover voltage. The device can handle a repetitive peak forward current of 2A with a 20µs pulse width.

The DB3 is designed for triggering triacs and other thyristors in AC power control circuits. It offers low breakover current and high reliability due to glass passivation and hermetically sealed construction. The compression bonded construction ensures robust mechanical integrity.

The device is packaged in a DO-204AH (DO-35) axial lead package, suitable for through-hole mounting. The terminals are pure tin plated and lead-free, solderable per MIL-STD-202. The operating temperature range is -40°C to 125°C junction temperature, with a maximum power dissipation of 150mW and thermal resistance of 400°C/W junction-to-ambient.

DB3 Quick Information

Product Type: DIAC (Bi-directional Trigger Diode)

Canonical Name: DB3 Bi-directional Trigger Diode (DIAC)

Subcategory: Thyristors - DIACs, SIDACs

DB3 Compliance

RoHS Status: RoHS Compliant

Moisture Sensitivity Level (MSL): 1 Unlimited

REACH Status: REACH Unaffected

Lead Free: Lead Free (pure tin plated)

DB3 Features

Breakover voltage range 28V to 36V.
Low breakover current of 100µA max.
Repetitive peak forward current 2A.
DO-35 axial lead through-hole package.
RoHS3 compliant and lead-free.

DB3 Applications

Used for triggering triacs in AC circuits.
Ideal for phase control and dimmer circuits.
Suitable for motor speed control applications.
Employed in solid-state relay circuits.

DB3 FAQs

7 frequently asked questions generated from this part’s specifications.

What is the breakover voltage of DB3?

The breakover voltage is 28V min, 32V typ, 36V max at C=22nF.

What package is DB3 available in?

DO-204AH (DO-35) axial lead package.

What is the operating temperature range?

-40°C to 125°C junction temperature.

Is DB3 RoHS compliant?

Yes, RoHS3 compliant and lead-free (pure tin plated).

What is the maximum power dissipation?

150mW.

What is the repetitive peak forward current rating?

2A at 20µs pulse width.

What is the leakage current?

10µA maximum at VB=0.5VBO(Max).

Category	Thyristors - DIACs, SIDACs
Manufacturer Name	STMicroelectronics
Current	2A @ Pulse Width=20μs
Lead Style	Axial
Mounting Type	Through Hole
Operating Temperature	-40°C to 125°C (TJ)
Power Dissipation (Max)	150mW
SVHC Present	Not Present
Supplier Device Package	DO-35
Termination Style	Axial
Voltage	28V Min / 32V Typ / 36V Max @ C=22nF

DB3