BZX84-C47,235 Equivalent & Substitute Parts

Part Overview

The BZX84-C47,235 is an automotive-grade Zener diode manufactured by Nexperia USA Inc., rated for 47 V nominal Zener voltage with 250 mW maximum power dissipation. This surface mount component in TO-236AB packaging is qualified to AEC-Q101 automotive standards and maintains active product status. Equivalent and substitute parts are identified to support design flexibility, inventory management, and supply chain continuity for applications requiring 47 V Zener regulation in compact surface mount form factors.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	47	V
Tolerance	±5%	—
Power - Max	250	mW
Impedance (Max)	170	Ohms
Current - Reverse Leakage @ Vr	50	nA @ 32.9 V
Voltage - Forward (Max) @ If	900	mV @ 10 mA
Operating Temperature	-65 to 150	°C
Mounting Type	Surface Mount	—
Package / Case	TO-236-3, SC-59, SOT-23-3	—
Grade	Automotive	—
Qualification	AEC-Q101	—

Substitute Part Grouping Explanation

Substitution of the BZX84-C47,235 is determined by the following critical parameters: nominal Zener voltage (47 V), maximum power dissipation capability, impedance characteristics, reverse leakage current, forward voltage drop, operating temperature range, surface mount package compatibility (TO-236-3 / SOT-23-3), and automotive qualification status.

Substitute parts are grouped into three categories:

Parametric Equivalent: Parts with identical or superior electrical specifications and automotive qualification, differing only in packaging format or tolerance grade.

Direct Manufacturer Equivalent: Parts from alternative manufacturers with matching core electrical parameters and compatible package footprints.

Similar Substitute: Parts with minor deviations in power rating, impedance, or leakage current that remain functionally compatible within the 47 V Zener voltage class.

All substitute parts maintain the 47 V nominal Zener voltage, surface mount SOT-23-3 / TO-236 package compatibility, and -65°C to 150°C operating temperature range. Variations in power dissipation (225 mW to 300 mW), impedance (105 to 170 Ohms), and tolerance (±2% to ±6%) are noted for circuit-specific evaluation.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (Nom)	Tolerance	Power Max	Zzt (Max)	Ir @ Vr	Vf (Max)	Temp Range	Package	Grade	AEC-Q101
BZX84-C47,235	Nexperia USA Inc.	47 V	±5%	250 mW	170 Ω	50 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	TO-236AB	Automotive	Yes
BZX84-B47,215	NXP USA Inc.	47 V	±2%	250 mW	170 Ω	50 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	SOT-23	Automotive	Yes
BZX84-C47,215	Nexperia USA Inc.	47 V	±5%	250 mW	170 Ω	50 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	TO-236AB	Automotive	Yes
BZX84C47LT1G	onsemi	47 V	±6%	225 mW	170 Ω	50 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	—	—
BZX84C47-7-F	Diodes Incorporated	47 V	±6%	300 mW	170 Ω	100 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	—	—
MMBZ5261BLT1G	onsemi	47 V	±5%	225 mW	105 Ω	100 nA @ 36 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	—	—
MMBZ5261ELT1G	onsemi	47 V	±5%	225 mW	105 Ω	100 nA @ 36 V	900 mV @ 10 mA	-55 to 150°C	SOT-23-3	—	—
SZBZX84C47LT1G	onsemi	47 V	±6%	225 mW	170 Ω	50 nA @ 32.9 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Automotive	Yes
SZMMBZ5261BLT1G	onsemi	47 V	±5%	225 mW	105 Ω	100 nA @ 36 V	900 mV @ 10 mA	-65 to 150°C	SOT-23-3	Automotive	Yes

Engineering Selection Recommendations

For Automotive Applications with AEC-Q101 Requirement:

BZX84-C47,215 (Nexperia, Tape & Reel) and SZBZX84C47LT1G (onsemi, Tape & Reel) are direct substitutes maintaining automotive qualification, AEC-Q101 certification, and identical electrical performance. BZX84-B47,215 (NXP, Bulk) provides superior tolerance (±2%) with equivalent automotive qualification and power rating.

SZMMBZ5261BLT1G (onsemi, Tape & Reel) qualifies for automotive applications with AEC-Q101 certification, though impedance is reduced to 105 Ohms and reverse leakage increases to 100 nA at 36 V.

For Non-Automotive or General-Purpose Applications:

BZX84C47LT1G (onsemi) and SZBZX84C47LT1G (onsemi) provide equivalent 47 V regulation with reduced power dissipation (225 mW). BZX84C47-7-F (Diodes Incorporated) offers increased power capability (300 mW) with higher reverse leakage (100 nA).

MMBZ5261BLT1G and MMBZ5261ELT1G (onsemi) feature lower impedance (105 Ohms) and higher reverse leakage, suitable for applications where these characteristics are acceptable. MMBZ5261ELT1G operates to -55°C minimum, restricting use in extended low-temperature environments.

Packaging Considerations:

All substitute parts are compatible with SOT-23-3 / TO-236 footprints. The main part (BZX84-C47,235) is supplied in Tape & Reel format; BZX84-B47,215 is supplied in Bulk; BZX84-C47,215 is supplied in Cut Tape & Digi-Reel format. Packaging format does not affect electrical performance or footprint compatibility.

Frequently Asked Questions (FAQ)

Q: Can BZX84C47LT1G replace BZX84-C47,235 in automotive applications?

A: BZX84C47LT1G is not qualified to AEC-Q101 and lacks automotive grade designation. It is suitable for non-automotive applications. For automotive use, select SZBZX84C47LT1G or BZX84-C47,215, both AEC-Q101 qualified.

Q: What is the difference between ±5% and ±6% tolerance specifications?

A: Tolerance defines the allowable deviation of the nominal 47 V Zener voltage. ±5% tolerance permits ±2.35 V deviation (44.65 V to 49.35 V); ±6% permits ±2.82 V deviation (44.18 V to 49.82 V). Circuit designs must accommodate the specified tolerance range of the selected part.

Q: Why does BZX84C47-7-F have 300 mW power rating while others are 225–250 mW?

A: BZX84C47-7-F is rated for higher power dissipation, allowing operation in higher-current applications. The 47 V Zener voltage remains identical. Selection depends on circuit power requirements; oversizing power rating does not degrade performance in lower-power applications.

Q: Are all substitute parts compatible with the same PCB footprint?

A: Yes. All substitute parts use SOT-23-3 or TO-236-3 package designations, which share identical footprints. The main part (BZX84-C47,235) and all substitutes are footprint-compatible.

Q: What is the significance of impedance (Zzt) differences between 105 Ohms and 170 Ohms?

A: Impedance affects Zener voltage stability under varying current conditions. Lower impedance (105 Ohms) provides better voltage regulation at high currents; higher impedance (170 Ohms) is acceptable for moderate-current applications. Circuit design determines the acceptable impedance range.

Q: Can MMBZ5261ELT1G be used in applications requiring -65°C operation?

A: No. MMBZ5261ELT1G is rated -55°C to 150°C, restricting operation below -55°C. For extended low-temperature applications, select parts rated -65°C to 150°C: BZX84-C47,235, BZX84-C47,215, BZX84C47LT1G, BZX84C47-7-F, SZBZX84C47LT1G, or SZMMBZ5261BLT1G.

Q: What is the impact of reverse leakage current differences (50 nA vs. 100 nA)?

A: Reverse leakage current represents the small current flowing through the Zener diode when reverse-biased below the Zener voltage. Higher leakage (100 nA) increases standby power consumption and may affect precision voltage reference circuits. Lower leakage (50 nA) is preferred for low-power applications.

Q: Is BZX84-B47,215 with ±2% tolerance a direct replacement for BZX84-C47,235 with ±5% tolerance?

A: BZX84-B47,215 is electrically compatible and maintains identical power rating, impedance, and automotive qualification. The tighter ±2% tolerance is a performance enhancement. Verify circuit design does not depend on the wider ±5% tolerance specification before substitution.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message