BZX84C13 Zener Diode Equivalent & Substitute Parts

Part Overview

The BZX84C13 is a surface mount Zener diode rated at 13 V nominal with 350 mW maximum power dissipation in a SOT-23-3 package. Manufactured by onsemi, this component is classified as obsolete. Due to its obsolete status, equivalent and substitute parts from active manufacturers are necessary for new designs and ongoing production requirements. Substitute parts maintain the core electrical specifications while offering improved availability and active product support from alternative manufacturers.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	13	V
Tolerance	±6%	-
Power - Max	350	mW
Impedance (Max)	30	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature	-55 to 150	°C
Mounting Type	Surface Mount	-
Package / Case	TO-236-3, SC-59, SOT-23-3	-
Moisture Sensitivity Level	1 (Unlimited)	-

Substitute Part Grouping Explanation

Substitution of the BZX84C13 is determined by the following critical parameters:

Electrical Specifications:

Zener voltage: 13 V nominal
Tolerance: ±5% to ±6% acceptable
Power dissipation: 250 mW to 410 mW range
Impedance: 13 to 30 Ohms maximum
Reverse leakage current: 100 to 500 nA
Forward voltage: 900 mV maximum @ 10 mA

Mechanical & Environmental:

Package: SOT-23-3 (TO-236-3, SC-59) surface mount
Operating temperature: -55°C to -65°C minimum; 150°C maximum
Moisture sensitivity: MSL 1 (Unlimited)
RoHS compliance: ROHS3 preferred for new designs

Substitute parts are grouped into two categories: direct electrical equivalents with identical specifications and parametric equivalents with acceptable variations in power rating or tolerance that remain functionally compatible within the application envelope.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Vf @ 10mA (mV)	Temp Range (°C)	Package	Status
BZX84C13	onsemi	13	±6%	350	30	900	-55 to 150	SOT-23-3	Obsolete
BZX84C13LT1G	onsemi	13	±6%	225	30	900	-65 to 150	SOT-23-3	Active
BZX84-C13,215	Nexperia USA Inc.	13	±5%	250	30	900	-65 to 150	SOT-23-3	Active
BZX84-C13,235	NXP Semiconductors	13	±5%	250	30	900	-65 to 150	SOT-23-3	Active
BZX84C13-7-F	Diodes Incorporated	13	±6%	300	30	900	-65 to 150	SOT-23-3	Active
BZX84C13_R1_00001	Panjit International Inc.	13	±5%	410	30	-	-55 to 150	SOT-23-3	Active
CMPZ5243B TR PBFREE	Central Semiconductor Corp	13	±5%	350	13	900	-65 to 150	SOT-23-3	Active
CMPZ5243B BK PBFREE	Central Semiconductor Corp	13	±5%	350	13	900	-65 to 150	SOT-23-3	Active
DDZX13B-7	Diodes Incorporated	13	±3%	300	14	900	-65 to 150	SOT-23-3	Active
BZX84C13-TP	Micro Commercial Co	13	±5%	350	30	900	-55 to 150	SOT-23-3	Active

Engineering Selection Recommendations

Direct Equivalents (Preferred for Replacement):

BZX84C13-TP (Micro Commercial Co) and BZX84-C13,215 (Nexperia USA Inc.) are the primary direct equivalents. Both maintain the 13 V nominal rating, 350 mW power dissipation, and SOT-23-3 package. BZX84C13-TP matches the original temperature range (-55°C to 150°C), while BZX84-C13,215 extends the minimum operating temperature to -65°C and carries AEC-Q101 automotive qualification. Both are ROHS3 compliant and in active production.

Active Manufacturer Alternatives:

BZX84C13LT1G (onsemi) maintains the same manufacturer lineage with active status. Power dissipation is reduced to 225 mW, suitable for applications with lower thermal requirements. Operating temperature range extends to -65°C minimum.

BZX84C13-7-F (Diodes Incorporated) provides 300 mW power dissipation with AEC-Q101 automotive qualification and extended temperature range (-65°C to 150°C).

CMPZ5243B TR PBFREE (Central Semiconductor Corp) matches the 350 mW specification with lower impedance (13 Ohms vs. 30 Ohms) and extended temperature range. Available in Tape & Reel packaging.

DDZX13B-7 (Diodes Incorporated) offers tighter tolerance (±3%) and lower impedance (14 Ohms) with 300 mW power rating and AEC-Q101 qualification.

Higher Power Option:

BZX84C13_R1_00001 (Panjit International Inc.) provides 410 mW maximum power dissipation for applications requiring higher thermal headroom, maintaining the 13 V specification and SOT-23-3 package.

Compliance & Availability:

All recommended substitutes are ROHS3 compliant, REACH unaffected, and carry MSL 1 (Unlimited) moisture sensitivity rating. Multiple sources ensure supply chain continuity. Selection should prioritize active product status and compliance certifications for new designs.

Frequently Asked Questions (FAQ)

Q: Can BZX84C13LT1G replace BZX84C13 directly?

A: Yes. BZX84C13LT1G is an active equivalent from the same manufacturer (onsemi) with identical 13 V nominal rating and SOT-23-3 package. The reduced power rating (225 mW vs. 350 mW) is acceptable for applications not requiring maximum power dissipation. Extended temperature range (-65°C minimum) provides additional operational margin.

Q: What is the difference between BZX84-C13,215 and BZX84-C13,235?

A: Both parts are 13 V Zener diodes in SOT-23-3 packages with 250 mW power dissipation and ±5% tolerance. BZX84-C13,215 is manufactured by Nexperia USA Inc. with AEC-Q101 automotive qualification. BZX84-C13,235 is from NXP Semiconductors with identical specifications and automotive qualification. Both are functionally equivalent; selection depends on supplier availability and packaging preference (Cut Tape vs. Bulk).

Q: Why is MMBZ5246BW-7-F listed as a substitute but not recommended?

A: MMBZ5246BW-7-F is a 16 V Zener diode, not a 13 V device. While listed in the original part's substitute field, it does not meet the core electrical requirement of 13 V nominal voltage and is therefore not a functional equivalent for this application.

Q: What is the significance of the ±3% tolerance in DDZX13B-7?

A: DDZX13B-7 offers tighter voltage tolerance (±3%) compared to the BZX84C13 (±6%). This provides more precise voltage regulation with reduced variation across the production batch. The tighter tolerance is beneficial in precision voltage reference applications but may not be necessary for general-purpose voltage regulation circuits.

Q: Are all substitute parts available in the same packaging options?

A: All recommended substitutes use the SOT-23-3 (TO-236-3, SC-59) surface mount package, ensuring mechanical and electrical compatibility. Packaging options vary by supplier: some offer Tape & Reel (TR), Cut Tape (CT), or Bulk configurations. Verify packaging availability with the selected supplier for procurement requirements.

Q: Which substitute offers the best thermal performance?

A: BZX84C13_R1_00001 (Panjit International Inc.) provides the highest power dissipation rating at 410 mW, offering the best thermal headroom. For applications with strict thermal constraints, this part accommodates higher power levels within the same package footprint.

Q: Is RoHS3 compliance mandatory for all substitutes?

A: All recommended active substitutes carry ROHS3 compliance certification. This is standard for current production components and required for most commercial and industrial applications. The original BZX84C13 (obsolete) does not specify RoHS status, but all active alternatives meet current environmental regulations.

Q: Can BZX84C13-TP be used in automotive applications?

A: BZX84C13-TP does not carry AEC-Q101 automotive qualification. For automotive applications, select BZX84-C13,215, BZX84-C13,235, BZX84C13-7-F, or DDZX13B-7, all of which are AEC-Q101 qualified.

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