MMBZ5246BW-7 Equivalent & Substitute Parts

Part Overview

The MMBZ5246BW-7 is a Zener diode rated at 16 V nominal with 200 mW power dissipation in a surface mount SOT-323 package. This part is discontinued at DiGi Electronics and classified as RoHS non-compliant. Due to its discontinued status and regulatory compliance limitations, equivalent substitute parts are necessary for new designs and ongoing production requirements. Suitable alternatives maintain the core electrical specifications while offering improved availability and compliance certifications.

Substiute Parts

MMBZ5246BW-7

Diodes IncorporatedIn Stock: 1103MMBZ5246BW-7 Datasheet

Current PartRFQ

MMBZ5246BW-7-F

Diodes IncorporatedIn Stock: 36439MMBZ5246BW-7-F Datasheet

DirectRFQ

BZX84C16W-7-F

Diodes IncorporatedIn Stock: 4248BZX84C16W-7-F Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the MMBZ5246BW-7 is determined by the following critical parameters:

Electrical Compatibility Requirements:

• Zener voltage: 16 V nominal
• Power rating: 200 mW maximum
• Voltage tolerance: ±5% or tighter
• Forward voltage: 900 mV maximum at 10 mA
• Reverse leakage current: 100 nA at specified reverse voltage
• Operating temperature range: -65°C to 150°C minimum

Mechanical Compatibility Requirements:

• Package type: SC-70 or SOT-323
• Mounting type: Surface Mount
• Moisture sensitivity level: 1 (Unlimited)

Regulatory and Compliance Considerations:

• RoHS compliance status
• REACH compliance status
• Product availability and active status

Substitute parts must satisfy all electrical parameters within the specified tolerances and maintain identical or superior mechanical packaging. Compliance certifications and product status determine suitability for specific applications.

Parameter Comparison

Engineering Selection Recommendations

MMBZ5246BW-7-F (Direct Substitute)

The MMBZ5246BW-7-F is the primary equivalent for the MMBZ5246BW-7. This part maintains identical electrical specifications including 16 V nominal zener voltage, 200 mW power rating, ±5% tolerance, and 17 Ohms maximum impedance. The operating temperature range extends to 150°C, matching the original part. The MMBZ5246BW-7-F is active in production with significantly higher inventory availability (36,400 units). It carries ROHS3 compliance certification and is qualified to AEC-Q101 automotive standards. The packaging format is Tape & Reel, suitable for automated assembly processes. This part is the recommended direct replacement for all applications.

BZX84C16W-7-F (Alternative Substitute)

The BZX84C16W-7-F provides functional equivalence with minor parameter variations. It maintains the 16 V nominal zener voltage, 200 mW power rating, and identical forward voltage characteristics. The tolerance specification is ±5.56%, which is slightly wider than the original ±5%. The impedance is specified at 40 Ohms maximum, compared to 17 Ohms for the original part. The operating temperature range is -65°C to 125°C, which is 25°C lower than the original specification. This part is active in production with ROHS3 compliance. Selection of this part is appropriate for applications where the reduced upper temperature limit and higher impedance are acceptable.

Frequently Asked Questions (FAQ)

Q: Can MMBZ5246BW-7-F be used as a direct replacement for MMBZ5246BW-7?

A: Yes. The MMBZ5246BW-7-F maintains identical electrical specifications for zener voltage (16 V), power rating (200 mW), tolerance (±5%), impedance (17 Ohms), and operating temperature range (-65°C to 150°C). Both parts use the same SOT-323 package. The primary difference is product status: MMBZ5246BW-7-F is active with higher inventory availability and ROHS3 compliance.

Q: What are the key differences between MMBZ5246BW-7-F and BZX84C16W-7-F?

A: Both parts share the same 16 V nominal zener voltage, 200 mW power rating, and SOT-323 package. Differences include: tolerance (±5% versus ±5.56%), impedance (17 Ohms versus 40 Ohms), and operating temperature range (-65°C to 150°C versus -65°C to 125°C). The BZX84C16W-7-F has a lower maximum operating temperature and higher impedance specification.

Q: Are there packaging differences between the substitute parts?

A: The original MMBZ5246BW-7 is supplied in bulk packaging. Both substitute parts (MMBZ5246BW-7-F and BZX84C16W-7-F) are supplied in Tape & Reel format, which is standard for automated assembly processes. All three parts use the SC-70/SOT-323 surface mount package.

Q: Does the MMBZ5246BW-7-F meet RoHS compliance requirements?

A: Yes. The MMBZ5246BW-7-F is ROHS3 compliant, whereas the original MMBZ5246BW-7 is RoHS non-compliant. This makes MMBZ5246BW-7-F suitable for applications with RoHS compliance mandates.

Q: What is the impedance specification and why does it matter?

A: Impedance (Zzt) is the dynamic impedance of the zener diode at the specified test current. The MMBZ5246BW-7 and MMBZ5246BW-7-F both specify 17 Ohms maximum impedance, while BZX84C16W-7-F specifies 40 Ohms. Lower impedance provides better voltage regulation characteristics. Applications requiring tighter voltage regulation should use parts with lower impedance specifications.

Q: Can BZX84C16W-7-F be used in applications requiring operation above 125°C?

A: No. The BZX84C16W-7-F operating temperature range is -65°C to 125°C. Applications requiring operation up to 150°C must use MMBZ5246BW-7-F, which is rated to 150°C.

Q: What is the significance of the tolerance specification difference?

A: The MMBZ5246BW-7 and MMBZ5246BW-7-F specify ±5% tolerance on the 16 V zener voltage, while BZX84C16W-7-F specifies ±5.56%. Tighter tolerance (±5%) provides more precise voltage regulation. Applications with strict voltage regulation requirements should use parts with ±5% tolerance.