BZX84C10 Zener Diode Equivalent & Substitute Parts

Part Overview

The BZX84C10 is a 10 V, 300 mW surface mount zener diode manufactured by Taiwan Semiconductor Corporation in SOT-23 packaging. This small signal zener diode is designed for voltage regulation and protection applications in electronic circuits. The part is currently in active production status with 68,100 units in stock inventory.

Substitute parts are necessary when the primary part number becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives from different manufacturers that meet the same electrical and mechanical requirements.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	10	V
Tolerance	±6%	—
Power - Maximum	300	mW
Impedance (Maximum)	20	Ohms
Current - Reverse Leakage @ 7 V	200	nA
Voltage - Forward (Maximum) @ 10 mA	900	mV
Operating Temperature Range	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	SOT-23-3 (TO-236-3, SC-59)	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the BZX84C10 is determined by strict equivalence across the following critical parameters:

Primary Substitution Criteria:

Voltage - Zener (Nominal): Must equal 10 V
Mounting Type: Must be Surface Mount
Package / Case: Must be SOT-23-3 (TO-236-3, SC-59) or compatible variant
Power - Maximum: Must be equal to or greater than 300 mW
Impedance (Maximum): Must be 20 Ohms or less
Current - Reverse Leakage @ 7 V: Must be 200 nA or less
Voltage - Forward (Maximum) @ 10 mA: Must be 900 mV or less
RoHS Status: Must be ROHS3 Compliant

Tolerance Consideration: Tolerance specifications may vary (±2%, ±5%, ±6%) among substitute parts. Parts with tighter tolerances (±2%) are electrically compatible with the original ±6% specification and represent acceptable substitutes.

Temperature Range Consideration: The original part specifies -65°C to 150°C. Substitute parts with -55°C to 150°C operating range represent a narrower specification but remain functionally compatible for most applications within the -55°C to 150°C window.

Power Rating Consideration: Substitute parts with power ratings of 250 mW or 350 mW are acceptable. Parts rated at 250 mW operate within the original 300 mW specification. Parts rated at 350 mW provide additional margin and are fully compatible.

Parameter Comparison

Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ 7V (nA)	Vf @ 10mA (mV)	Temp Range (°C)	Package	Status
BZX84C10	Taiwan Semiconductor Corporation	10	±6%	300	20	200	900	-65 to 150	SOT-23-3	Active
BZX84C10 RFG	Taiwan Semiconductor Corporation	10	±5%	300	20	200	900	-65 to 150	SOT-23-3	Active
BZX84B10-7-F	Diodes Incorporated	10	±2%	300	20	200	900	-65 to 150	SOT-23-3	Active
BZX84B10-E3-08	Vishay General Semiconductor - Diodes Division	10	±2%	300	20	200	—	-55 to 150	SOT-23-3	Active
BZX84B10-HE3-08	Vishay General Semiconductor - Diodes Division	10	±2%	300	20	200	—	-55 to 150	SOT-23-3	Obsolete
BZX84B10LT1G	onsemi	10	±2%	250	15	200	900	-65 to 150	SOT-23-3	Active
BZX84C10 TR PBFREE	Central Semiconductor Corp	10	±5%	350	20	200	900	-65 to 150	SOT-23-3	Active
BZX84C10-7-F	Diodes Incorporated	10	±6%	300	20	200	900	-65 to 150	SOT-23-3	Active
BZX84C10-E3-08	Vishay General Semiconductor - Diodes Division	10	±5%	300	20	200	—	-55 to 150	SOT-23-3	Active
BZX84C10-G3-08	Vishay General Semiconductor - Diodes Division	10	±5%	300	20	200	—	-55 to 150	SOT-23-3	Active
BZX84C10-HE3-08	Vishay General Semiconductor - Diodes Division	10	±5%	300	20	200	—	-55 to 150	SOT-23-3	Obsolete

Engineering Selection Recommendations

Primary Substitutes (Highest Compatibility):

BZX84C10 RFG (Taiwan Semiconductor Corporation) and BZX84C10-7-F (Diodes Incorporated) are direct parametric equivalents to the original BZX84C10. Both maintain identical zener voltage, power rating, impedance, and operating temperature range. BZX84C10 RFG offers improved tolerance (±5% versus ±6%) and is supplied in Tape & Reel packaging. BZX84C10-7-F maintains the original ±6% tolerance and is supplied in Cut Tape & Digi-Reel format. Both parts are ROHS3 compliant and in active production.

Secondary Substitutes (Tighter Tolerance, Reduced Temperature Range):

BZX84B10-7-F (Diodes Incorporated), BZX84B10-E3-08 (Vishay), and BZX84C10-E3-08 (Vishay) provide ±2% tolerance specification, which is superior to the original ±6%. These parts operate across -55°C to 150°C, which is narrower than the original -65°C to 150°C range. All three are ROHS3 compliant and in active production status. These substitutes are suitable for applications where the reduced lower temperature limit is acceptable.

Alternative with Enhanced Power Rating:

BZX84C10 TR PBFREE (Central Semiconductor Corp) provides 350 mW power rating compared to the original 300 mW specification, offering additional thermal margin. This part maintains ±5% tolerance and the full -65°C to 150°C operating range. It is ROHS3 compliant and in active production.

Alternative with Reduced Power Rating:

BZX84B10LT1G (onsemi) operates at 250 mW power rating with ±2% tolerance and 15 Ohms maximum impedance. This part maintains the full -65°C to 150°C operating temperature range and is ROHS3 compliant. The reduced power rating is suitable for applications with lower power dissipation requirements.

Obsolete Parts (Not Recommended for New Designs):

BZX84B10-HE3-08 and BZX84C10-HE3-08 (Vishay) are marked as obsolete. While these parts meet electrical specifications and carry AEC-Q101 automotive qualification, their obsolete status indicates discontinued production. These parts should not be selected for new designs.

Frequently Asked Questions (FAQ)

Q: Can BZX84C10 be replaced with BZX84B10-7-F?

A: Yes. BZX84B10-7-F meets all critical electrical parameters: 10 V zener voltage, 300 mW power rating, 20 Ohms maximum impedance, and 200 nA reverse leakage current. The ±2% tolerance is superior to the original ±6%. The operating temperature range is -55°C to 150°C, which is narrower than the original -65°C to 150°C. This substitution is valid for applications operating within -55°C to 150°C.

Q: What is the difference between BZX84C10 and BZX84C10 RFG?

A: Both parts are manufactured by Taiwan Semiconductor Corporation with identical electrical specifications: 10 V zener voltage, 300 mW power rating, and -65°C to 150°C operating range. The primary difference is packaging format. BZX84C10 RFG is supplied in Tape & Reel (TR) format, while the standard BZX84C10 is supplied in standard packaging. BZX84C10 RFG also specifies ±5% tolerance compared to ±6% for the standard part.

Q: Is BZX84B10LT1G a suitable substitute despite the 250 mW power rating?

A: BZX84B10LT1G is electrically compatible with the BZX84C10 for applications where the power dissipation requirement does not exceed 250 mW. The part maintains 10 V zener voltage, ±2% tolerance, and the full -65°C to 150°C operating temperature range. The 15 Ohms maximum impedance is superior to the original 20 Ohms specification. This substitution is valid only when the circuit design confirms that power dissipation remains below 250 mW.

Q: Can I use BZX84C10-E3-08 in place of BZX84C10?

A: Yes, with temperature range consideration. BZX84C10-E3-08 (Vishay) maintains 10 V zener voltage, 300 mW power rating, 20 Ohms impedance, and ±5% tolerance. The operating temperature range is -55°C to 150°C, which is narrower than the original -65°C to 150°C. This substitution is valid for applications operating within -55°C to 150°C.

Q: Why are BZX84B10-HE3-08 and BZX84C10-HE3-08 listed as obsolete?

A: Both parts are marked with obsolete product status, indicating that the manufacturers have discontinued production. While these parts meet electrical specifications and carry AEC-Q101 automotive qualification, their obsolete status means they are no longer in active production and should not be selected for new designs. Existing inventory may be available, but long-term supply cannot be guaranteed.

Q: What packaging formats are available for BZX84C10 substitutes?

A: Substitute parts are available in three packaging formats: Tape & Reel (TR), Cut Tape (CT) & Digi-Reel, and Cut Tape (CT) & Digi-Reel with automotive qualification. The choice of packaging format depends on manufacturing process requirements. Tape & Reel format is standard for automated assembly lines. Cut Tape & Digi-Reel format is suitable for lower-volume production or manual assembly processes.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed in this reference maintain ROHS3 compliance status, consistent with the original BZX84C10 specification. All parts are also REACH unaffected and carry EAR99 ECCN classification.

Q: What is the significance of ±2% tolerance versus ±6% tolerance?

A: Tolerance specification defines the allowable deviation from the nominal zener voltage. The original BZX84C10 specifies ±6%, meaning the actual zener voltage can range from 9.4 V to 10.6 V. Substitute parts with ±2% tolerance (such as BZX84B10-7-F) provide tighter voltage regulation, with actual zener voltage ranging from 9.8 V to 10.2 V. Tighter tolerance is beneficial for precision voltage regulation applications but is not required for general-purpose applications where the original ±6% specification is acceptable.

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