BZX84C13_D87Z Equivalent & Substitute Parts

Part Overview

The BZX84C13_D87Z is a 13 V Zener diode manufactured by onsemi, rated for 350 mW power dissipation in a surface mount SOT-23-3 package. This component is classified as obsolete, indicating that direct procurement from the original manufacturer is no longer available. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain reliability, and support ongoing production or maintenance requirements for applications utilizing this Zener diode specification.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nominal)	13	V
Tolerance	±6%	—
Power - Maximum	350	mW
Impedance (Maximum)	30	Ohms
Current - Reverse Leakage @ Vr	100	nA @ 8 V
Voltage - Forward (Maximum) @ If	900	mV @ 10 mA
Operating Temperature Range	-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_D87Z is determined by strict adherence to the following electrical and mechanical parameters:

Critical Parameters for Substitution:

Zener voltage: 13 V nominal
Package type: SOT-23-3 / TO-236-3 / SC-59 (surface mount)
Impedance (maximum): 30 Ohms
Reverse leakage current: 100 nA @ 8 V
Forward voltage: 900 mV @ 10 mA maximum
Mounting type: Surface Mount

Allowable Variations:

Power rating: Substitute parts may have equal or greater power dissipation (225 mW to 350 mW)
Tolerance: ±5% to ±6% acceptable
Operating temperature range: Substitute parts may have extended lower temperature limits (-65°C vs. -55°C)
Product status: Active status preferred for ongoing availability

All substitute parts listed maintain identical Zener voltage, package configuration, impedance, and leakage characteristics. Variations in power rating and temperature range represent acceptable deviations that do not compromise circuit functionality.

Parameter Comparison

Parameter	BZX84C13_D87Z (Main)	BZX84C13LT1G	BZX84-C13,215	BZX84-C13,235	BZX84C13-7-F	BZX84C13-TP
Manufacturer	onsemi	onsemi	Nexperia USA Inc.	NXP Semiconductors	Diodes Incorporated	Micro Commercial Co
Voltage - Zener (Nom)	13 V	13 V	13 V	13 V	13 V	13 V
Tolerance	±6%	±6%	±5%	±5%	±6%	±5%
Power - Max	350 mW	225 mW	250 mW	250 mW	300 mW	350 mW
Impedance (Max)	30 Ohms	30 Ohms	30 Ohms	30 Ohms	30 Ohms	30 Ohms
Current - Reverse Leakage @ Vr	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V	100 nA @ 8 V
Voltage - Forward (Max) @ If	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA	900 mV @ 10 mA
Operating Temperature	-55 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-65 to 150°C	-55 to 150°C
Package / Case	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3	TO-236-3, SC-59, SOT-23-3
Product Status	Obsolete	Active	Active	Active	Active	Active
RoHS Status	—	ROHS3 Compliant	ROHS3 Compliant	—	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute - BZX84C13LT1G (onsemi): This part maintains manufacturer continuity with the original BZX84C13_D87Z. It is active in production, ROHS3 compliant, and offers extended operating temperature range (-65°C to 150°C). The reduced power rating of 225 mW is acceptable for applications not requiring the full 350 mW dissipation capacity. This part is available in high volume (167,300 units in stock).

Secondary Substitutes - BZX84-C13,215 and BZX84-C13,235 (Nexperia/NXP): Both parts are automotive-grade (AEC-Q101 qualified) with ±5% tolerance and 250 mW power rating. These options provide enhanced reliability certification and extended temperature range (-65°C to 150°C). BZX84-C13,215 is available in Cut Tape & Digi-Reel packaging (33,317 units), while BZX84-C13,235 is available in bulk packaging (80,710 units).

Alternative Substitute - BZX84C13-7-F (Diodes Incorporated): This part matches the original 350 mW power rating and is automotive-grade (AEC-Q101 qualified). It provides extended operating temperature range (-65°C to 150°C) and is available in high volume (116,400 units). ROHS3 compliance is confirmed.

Parametric Equivalent - BZX84C13-TP (Micro Commercial Co): This part exactly matches the original BZX84C13_D87Z specifications, including 350 mW power rating and -55°C to 150°C operating range. It is active in production with ROHS3 compliance. Inventory availability is lower (3,385 units) compared to other options.

Selection Criteria:

For maximum supply chain continuity: BZX84C13LT1G
For automotive applications: BZX84-C13,215, BZX84-C13,235, or BZX84C13-7-F
For exact specification matching: BZX84C13-TP
For highest inventory availability: BZX84-C13,235

Frequently Asked Questions (FAQ)

Q: Can BZX84C13LT1G replace BZX84C13_D87Z if the application requires 350 mW dissipation?

A: No. BZX84C13LT1G is rated for 225 mW maximum power dissipation, compared to 350 mW for the original part. If the circuit design requires the full 350 mW capacity, use BZX84C13-7-F, BZX84C13-TP, or BZX84-C13,215 instead.

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

A: Yes. All substitute parts use the SOT-23-3 / TO-236-3 / SC-59 package configuration, which maintains identical physical dimensions and pin layout. Direct PCB replacement is possible without layout modifications.

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

A: Both parts are electrically identical with 13 V Zener voltage, ±5% tolerance, 250 mW power rating, and AEC-Q101 automotive qualification. The primary difference is packaging: BZX84-C13,215 is supplied in Cut Tape & Digi-Reel format, while BZX84-C13,235 is supplied in bulk. Select based on your procurement and assembly process requirements.

Q: Why does BZX84C13LT1G have a lower power rating than the original part?

A: BZX84C13LT1G represents a newer generation design within the onsemi BZX84CxxxLT1G series. The reduced power rating reflects improved thermal efficiency and manufacturing advances. For applications operating below 225 mW, this part provides equivalent performance with enhanced reliability.

Q: Are automotive-grade substitutes required for non-automotive applications?

A: No. Automotive-grade parts (BZX84-C13,215, BZX84-C13,235, BZX84C13-7-F) exceed the reliability and qualification requirements of standard industrial applications. These parts are acceptable substitutes but not mandatory unless your application specifically requires AEC-Q101 certification.

Q: What is the impact of ±5% versus ±6% tolerance on circuit design?

A: The tolerance difference represents a 1% variation in Zener voltage accuracy. For most voltage regulation and protection applications, this difference is negligible. If your circuit requires precise voltage regulation within ±5%, select BZX84-C13,215, BZX84-C13,235, or BZX84C13-TP. For general-purpose applications, ±6% tolerance is acceptable.

Q: Can I use BZX84C13-TP as a direct replacement for BZX84C13_D87Z?

A: Yes. BZX84C13-TP matches all critical electrical parameters (13 V Zener voltage, 350 mW power rating, 30 Ohms impedance, 100 nA reverse leakage) and uses the identical SOT-23-3 package. The only difference is the operating temperature range (-55°C to 150°C for both), making it a true parametric equivalent.

Q: Which substitute offers the best long-term supply availability?

A: BZX84C13LT1G (onsemi) and BZX84-C13,235 (NXP) offer the highest inventory levels (167,300 and 80,710 units respectively) and active production status. Both manufacturers are established suppliers with stable product lines, ensuring continued availability for future procurement.

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