CMPZ5260B TR PBFREE Zener Diode 43V 350mW Equivalent & Substitute Parts

Part Overview

The CMPZ5260B TR PBFREE is a surface mount Zener diode manufactured by Central Semiconductor Corp, rated at 43 V nominal Zener voltage with 350 mW maximum power dissipation. This component operates across the temperature range of -65°C to 150°C and is packaged in SOT-23 (TO-236-3) configuration. The part is RoHS3 compliant and carries REACH Unaffected status. As an active product with 1128 units in stock, equivalent and substitute parts are identified to support design flexibility, supply chain alternatives, and application-specific performance requirements where tolerance, power rating, or impedance characteristics may differ.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	43	V
Tolerance	±5%	—
Power - Max	350	mW
Impedance (Max)	93	Ohms
Current - Reverse Leakage @ Vr	100 nA @ 33 V	—
Voltage - Forward (Vf) (Max) @ If	900 mV @ 10 mA	—
Operating Temperature	-65°C to 150°C	—
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the CMPZ5260B TR PBFREE is determined by strict equivalence in the following electrical and mechanical parameters:

Primary Substitution Criteria:

Zener voltage: 43 V nominal (fixed requirement)
Package type: SOT-23 / TO-236-3 surface mount configuration (mechanical compatibility)
Operating temperature range: -65°C to 150°C minimum (thermal envelope)
Forward voltage: 900 mV @ 10 mA (functional compatibility)

Secondary Variation Parameters (Allowed Differences):

Tolerance: ±1% to ±7% (tighter or equivalent tolerance acceptable)
Power rating: 225 mW to 350 mW (equal or greater power dissipation acceptable)
Impedance: 90 Ohms to 150 Ohms (within acceptable dynamic impedance range)
Reverse leakage current: 50 nA to 100 nA @ 30.1 V to 33 V (within acceptable leakage specification)

All substitute parts listed maintain the 43 V Zener voltage specification, SOT-23 package configuration, and -65°C to 150°C operating temperature range. Variations in power rating, tolerance, and impedance reflect manufacturer-specific design choices while preserving functional equivalence for circuit applications.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Ir @ Vr (nA)	Vf @ If (mV)	Temp Range (°C)	Package	Inventory (Pcs)
CMPZ5260B TR PBFREE	Central Semiconductor Corp	43	±5%	350	93	100 @ 33 V	900 @ 10 mA	-65 to 150	SOT-23	1128
BZX84-A43,215	NXP Semiconductors	43	±1%	250	150	50 @ 30.1 V	900 @ 10 mA	-65 to 150	TO-236AB	96740
BZX84-B43,215	NXP USA Inc.	43	±2%	250	150	50 @ 30.1 V	900 @ 10 mA	-65 to 150	SOT-23	29719
BZX84-C43,215	NXP USA Inc.	43	±5%	250	150	50 @ 30.1 V	900 @ 10 mA	-65 to 150	SOT-23	12100
BZX84C43-7-F	Diodes Incorporated	43	±7%	300	150	100 @ 30.1 V	900 @ 10 mA	-65 to 150	SOT-23-3	8675
BZX84C43-E3-08	Vishay General Semiconductor	43	±5%	300	150	50 @ 30.1 V	900 @ 10 mA	-55 to 150	SOT-23-3	6243
BZX84C43-TP	Micro Commercial Co	43	±5%	350	150	100 @ 30.1 V	900 @ 10 mA	-55 to 150	SOT-23	6505
DDZX43-7	Diodes Incorporated	43	±2%	300	90	50 @ 33 V	900 @ 10 mA	-65 to 150	SOT-23-3	15200
MMBZ5260BLT1G	onsemi	43	±5%	225	93	100 @ 33 V	900 @ 10 mA	-65 to 150	SOT-23-3	4400
SZBZX84C43ET1G	onsemi	43	±7%	225	150	50 @ 30.1 V	900 @ 10 mA	-65 to 150	SOT-23-3	60100
SZBZX84C43LT1G	onsemi	43	±7%	225	150	50 @ 30.1 V	900 @ 10 mA	-65 to 150	SOT-23-3	15635

Engineering Selection Recommendations

Direct Electrical Equivalents (Identical Specifications):

BZX84-C43,215 (NXP USA Inc.) provides direct equivalence with matching 43 V nominal voltage, ±5% tolerance, and 900 mV forward voltage. This part is RoHS3 compliant and carries AEC-Q101 automotive qualification. With 12,100 units in inventory, it represents a primary substitute option.

BZX84C43-TP (Micro Commercial Co) matches the CMPZ5260B TR PBFREE in power rating (350 mW), tolerance (±5%), and forward voltage specification. RoHS3 compliant with 6,505 units available. Operating temperature range is -55°C to 150°C, which covers the primary operating window but does not extend to the full -65°C minimum of the original part.

High-Tolerance Alternatives (Tighter Tolerance):

BZX84-A43,215 (NXP Semiconductors) offers ±1% tolerance with AEC-Q101 qualification and automotive grade designation. Power rating is 250 mW, which is lower than the original 350 mW specification. This part is suitable for applications where tighter voltage tolerance is required and power dissipation does not exceed 250 mW. Inventory: 96,740 units.

DDZX43-7 (Diodes Incorporated) provides ±2% tolerance with impedance of 90 Ohms, matching the original part's impedance specification. Power rating is 300 mW. RoHS3 compliant with 15,200 units in stock. Operating temperature range is -65°C to 150°C, providing full compatibility with the original thermal envelope.

Lower Power Alternatives (Reduced Power Dissipation):

MMBZ5260BLT1G (onsemi) maintains ±5% tolerance and 93 Ohms impedance matching the original part. Power rating is 225 mW, suitable for applications with reduced power dissipation requirements. RoHS3 compliant with 4,400 units available.

SZBZX84C43ET1G and SZBZX84C43LT1G (onsemi) both provide ±7% tolerance with AEC-Q101 automotive qualification. Power rating is 225 mW. Both parts are RoHS3 compliant with high inventory availability (60,100 and 15,635 units respectively).

Compliance and Certification Status:

All listed substitute parts are RoHS3 compliant and REACH unaffected. NXP parts (BZX84-A43,215, BZX84-B43,215, BZX84-C43,215) and onsemi automotive-grade parts (SZBZX84C43ET1G, SZBZX84C43LT1G) carry AEC-Q101 qualification, suitable for automotive applications. Selection should be based on specific power dissipation requirements, tolerance specifications, and supply chain availability.

Frequently Asked Questions (FAQ)

Q: Can BZX84-A43,215 replace CMPZ5260B TR PBFREE in all applications?

A: BZX84-A43,215 is electrically equivalent in Zener voltage (43 V) and forward voltage (900 mV @ 10 mA). However, its maximum power rating is 250 mW compared to the original 350 mW. Substitution is valid only if circuit power dissipation does not exceed 250 mW. The ±1% tolerance is tighter than the original ±5%, which is acceptable for most applications.

Q: What is the difference between BZX84-B43,215 and BZX84-C43,215?

A: Both parts are manufactured by NXP USA Inc. in SOT-23 package with 43 V Zener voltage and 250 mW power rating. The primary difference is tolerance: BZX84-B43,215 is ±2% while BZX84-C43,215 is ±5%. Both carry AEC-Q101 qualification. Selection depends on tolerance requirements for the specific application.

Q: Is BZX84C43-TP suitable for applications requiring -65°C operation?

A: BZX84C43-TP has an operating temperature range of -55°C to 150°C. If the application requires operation at -65°C, this part is not suitable. Alternative parts with -65°C minimum temperature include CMPZ5260B TR PBFREE, BZX84-A43,215, BZX84-B43,215, BZX84-C43,215, BZX84C43-7-F, DDZX43-7, MMBZ5260BLT1G, SZBZX84C43ET1G, and SZBZX84C43LT1G.

Q: What is the significance of impedance (Zzt) differences between substitute parts?

A: Impedance values range from 90 Ohms to 150 Ohms across the substitute parts. Lower impedance (90-93 Ohms) provides better voltage regulation at higher currents. Higher impedance (150 Ohms) is acceptable for lower-current applications. The original CMPZ5260B TR PBFREE has 93 Ohms impedance. DDZX43-7 matches this specification exactly, while other substitutes with 150 Ohms impedance are suitable for applications where dynamic impedance is not a critical parameter.

Q: Are all substitute parts RoHS3 compliant?

A: Yes, all listed substitute parts are RoHS3 compliant and REACH unaffected, matching the compliance status of the original CMPZ5260B TR PBFREE.

Q: Which substitute offers the best inventory availability?

A: SZBZX84C43ET1G (onsemi) has the highest inventory with 60,100 units in stock. BZX84-A43,215 (NXP Semiconductors) is the second option with 96,740 units. Both parts are suitable for high-volume applications requiring immediate availability.

Q: Can I use MMBZ5260BLT1G as a direct replacement for lower-power applications?

A: MMBZ5260BLT1G is suitable for applications where power dissipation does not exceed 225 mW. It maintains the same 43 V Zener voltage, ±5% tolerance, 93 Ohms impedance, and -65°C to 150°C operating temperature range as the original part. For circuits designed to operate within 225 mW power budget, this part provides direct functional equivalence.

Q: What is the difference between automotive-grade and standard Zener diodes in this list?

A: Automotive-grade parts (BZX84-A43,215, BZX84-B43,215, BZX84-C43,215, SZBZX84C43ET1G, SZBZX84C43LT1G) carry AEC-Q101 qualification, indicating compliance with automotive reliability and quality standards. Standard parts do not carry this certification. Selection of automotive-grade parts is required for automotive applications; standard parts are suitable for industrial and consumer applications.

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