ZTX690BSTOB Equivalent & Substitute Parts

Part Overview

The ZTX690BSTOB is a Bipolar (BJT) Transistor manufactured by Diodes Incorporated, classified as an NPN-type through-hole component in the E-Line (TO-92 compatible) package. This device is rated for 45 V collector-emitter breakdown voltage with a maximum collector current of 2 A and 1 W power dissipation capability. The ZTX690BSTOB is currently listed as obsolete, making identification of equivalent substitute parts essential for ongoing design support and component procurement.

Substiute Parts

ZTX690BSTOB

Diodes IncorporatedIn Stock: 886ZTX690BSTOB Datasheet

Current PartRFQ

ZTX690BSTZ

Diodes IncorporatedIn Stock: 17994ZTX690BSTZ Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the ZTX690BSTOB is determined by electrical and mechanical parameter equivalence across the following criteria:

Electrical Parameters (Critical for Functional Equivalence):

• Transistor polarity type (NPN)
• Maximum collector current rating (2 A)
• Maximum collector-emitter breakdown voltage (45 V)
• Saturation voltage characteristics (500mV @ 5mA, 1A)
• Collector cutoff current (100nA ICBO)
• DC current gain minimum specification (400 @ 1A, 2V)
• Transition frequency (150MHz)
• Maximum power dissipation (1 W)
• Operating temperature range (-55°C ~ 200°C)

Mechanical Parameters (Critical for Physical Compatibility):

• Mounting type (Through Hole)
• Package classification (E-Line-3, Formed Leads / TO-92 compatible)

Compliance Parameters:

• RoHS3 compliance status
• REACH compliance status
• Moisture sensitivity level (MSL 1)

Substitute parts must match all electrical specifications and maintain identical mechanical packaging to ensure direct circuit board compatibility without layout modifications.

Parameter Comparison

Engineering Selection Recommendations

The ZTX690BSTZ is a direct parametric equivalent to the ZTX690BSTOB. All electrical specifications, mechanical dimensions, and compliance certifications are identical between the two parts. The primary distinction is product status: the ZTX690BSTOB is obsolete while the ZTX690BSTZ maintains active production status with Diodes Incorporated.

The ZTX690BSTZ is supplied in Cut Tape (CT) packaging format, whereas the original part packaging format is not specified in the available data. Both parts are manufactured by the same supplier and share identical base product lineage within the ZTX690 series.

For applications requiring the ZTX690BSTOB, the ZTX690BSTZ provides full electrical and mechanical compatibility. The active production status of the ZTX690BSTZ ensures long-term component availability and supply chain continuity. Both parts maintain ROHS3 compliance and REACH unaffected status, supporting regulatory requirements for current manufacturing standards.

Frequently Asked Questions (FAQ)

Q: Can the ZTX690BSTZ be used as a direct replacement for the ZTX690BSTOB in existing circuit designs?

A: Yes. The ZTX690BSTZ is electrically and mechanically equivalent to the ZTX690BSTOB. All electrical parameters, including collector current rating, breakdown voltage, saturation characteristics, current gain, and frequency response, are identical. Both components use the same E-Line (TO-92 compatible) through-hole package with formed leads, enabling direct board-level substitution without circuit modifications.

Q: What is the difference between the ZTX690BSTOB and ZTX690BSTZ?

A: The primary difference is product status and packaging format. The ZTX690BSTOB is classified as obsolete, while the ZTX690BSTZ is in active production. The ZTX690BSTZ is supplied in Cut Tape (CT) packaging. All electrical specifications and mechanical package dimensions are identical.

Q: Are there any compliance or regulatory differences between these parts?

A: No. Both the ZTX690BSTOB and ZTX690BSTZ are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity classification. Regulatory and environmental compliance status is identical between the two parts.

Q: What packaging formats are available for the ZTX690BSTZ?

A: The ZTX690BSTZ is supplied in Cut Tape (CT) packaging format. Both parts use the E-Line-3 package with formed leads, compatible with standard through-hole circuit board assembly processes.

Q: Is the ZTX690BSTZ suitable for high-temperature applications?

A: Yes. The ZTX690BSTZ operates across the temperature range of -55°C to 200°C (junction temperature), identical to the ZTX690BSTOB. This specification supports applications requiring extended operating temperature ranges.

Q: What is the transition frequency specification for the ZTX690BSTZ?

A: The transition frequency (fT) for the ZTX690BSTZ is 150MHz, matching the ZTX690BSTOB specification. This parameter defines the frequency at which the transistor's current gain drops to unity and is relevant for high-frequency switching and amplification applications.

Q: Can the ZTX690BSTZ handle the same current and voltage levels as the ZTX690BSTOB?

A: Yes. The ZTX690BSTZ is rated for maximum collector current of 2 A and collector-emitter breakdown voltage of 45 V, identical to the ZTX690BSTOB. Maximum power dissipation is 1 W for both parts.