BZX84C39TS-7-F Equivalent & Substitute Parts

Part Overview

The BZX84C39TS-7-F is a Zener Diode Array manufactured by Diodes Incorporated, featuring three independent 39 V Zener diodes in a SOT-363 surface mount package. This component is classified as obsolete, necessitating identification of equivalent substitute parts for ongoing design requirements and procurement needs. The part delivers 200 mW maximum power dissipation with ±6% voltage tolerance and operates across the temperature range of -65°C to 150°C.

Key Parameters

Parameter	Value
Manufacturer Part Number	BZX84C39TS-7-F
Manufacturer	Diodes Incorporated
Category	Diodes, Zener
Configuration	3 Independent
Voltage - Zener (Nom)	39 V
Tolerance	±6%
Power - Max	200 mW
Impedance (Max)	130 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 27.3 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C
Package / Case	6-TSSOP, SC-88, SOT-363
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the BZX84C39TS-7-F is determined by the following critical parameters:

Mechanical Compatibility:

Package type: SOT-363 (6-TSSOP, SC-88)
Mounting type: Surface Mount
Configuration: 3 Independent Zener diodes

Electrical Compatibility:

Power dissipation: 200 mW maximum
Operating temperature range: -65°C to 150°C
Forward voltage: 900 mV @ 10 mA
Reverse leakage current: 100 nA

Regulatory Compliance:

RoHS3 Compliant
REACH Unaffected
ECCN: EAR99

The substitute part MMBZ5251BTS-7-F shares identical mechanical packaging, power rating, temperature range, forward voltage characteristics, and regulatory compliance status. The primary electrical difference is the nominal Zener voltage specification, which differs from the main part and must be evaluated against circuit requirements.

Parameter Comparison

Parameter	BZX84C39TS-7-F	MMBZ5251BTS-7-F
Manufacturer	Diodes Incorporated	Diodes Incorporated
Configuration	3 Independent	3 Independent
Voltage - Zener (Nom)	39 V	22 V
Tolerance	±6%	±5%
Power - Max	200 mW	200 mW
Impedance (Max)	130 Ohms	29 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 27.3 V	100 nA @ 17 V
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-65°C ~ 150°C	-65°C ~ 150°C
Package / Case	SOT-363	SOT-363
Mounting Type	Surface Mount	Surface Mount
Product Status	Obsolete	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

The BZX84C39TS-7-F is classified as obsolete, making the MMBZ5251BTS-7-F the identified substitute from Diodes Incorporated. Both parts maintain identical mechanical packaging (SOT-363), power rating (200 mW), operating temperature range (-65°C to 150°C), and regulatory compliance (ROHS3 Compliant, REACH Unaffected).

The MMBZ5251BTS-7-F offers the advantage of active product status, ensuring continued availability and manufacturing support. Both components demonstrate equivalent forward voltage characteristics (900 mV @ 10 mA) and reverse leakage specifications (100 nA).

The primary distinction between these parts is the nominal Zener voltage: the main part specifies 39 V with ±6% tolerance, while the substitute specifies 22 V with ±5% tolerance. This voltage difference directly impacts circuit performance and must be evaluated against specific application requirements. The substitute also exhibits lower impedance (29 Ohms versus 130 Ohms), which affects dynamic response characteristics.

Selection of the substitute part requires confirmation that the 22 V Zener voltage is compatible with the intended circuit design and protection requirements.

Frequently Asked Questions (FAQ)

Q: Can the MMBZ5251BTS-7-F directly replace the BZX84C39TS-7-F in all applications?

A: Both parts share identical mechanical packaging (SOT-363), power dissipation (200 mW), operating temperature range (-65°C to 150°C), and regulatory compliance. However, the nominal Zener voltage differs (22 V versus 39 V). Direct substitution is only valid when the circuit design accommodates the 22 V specification. The application must be evaluated to confirm voltage compatibility.

Q: What are the key mechanical compatibility factors?

A: Both parts utilize the SOT-363 package (6-TSSOP, SC-88) with surface mount configuration. Pin count, footprint, and mounting requirements are identical, ensuring PCB layout compatibility without modification.

Q: How do the electrical characteristics compare?

A: The parts share identical power ratings (200 mW), forward voltage (900 mV @ 10 mA), and reverse leakage current (100 nA). The impedance differs (130 Ohms versus 29 Ohms), and the Zener voltage differs (39 V versus 22 V). These electrical differences must be evaluated against circuit requirements.

Q: What is the significance of the product status difference?

A: The BZX84C39TS-7-F is classified as obsolete, indicating discontinued manufacturing. The MMBZ5251BTS-7-F maintains active status, ensuring ongoing availability, manufacturing support, and supply chain reliability.

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

A: Both parts are ROHS3 Compliant, REACH Unaffected, and carry identical regulatory classifications (ECCN: EAR99, HTSUS: 8541.10.0050). Moisture sensitivity level is identical (MSL 1, Unlimited). No compliance barriers exist to substitution.

Q: How does the tolerance specification affect substitution?

A: The main part specifies ±6% tolerance, while the substitute specifies ±5% tolerance. The substitute offers tighter tolerance control, which may improve circuit performance consistency. This represents an enhancement rather than a limitation for substitution purposes.

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