MMSZ5235B-TP Zener Diode 6.8V 500mW SOD-123 Equivalent & Substitute Parts

Part Overview

The MMSZ5235B-TP is a 6.8 V Zener diode rated for 500 mW maximum power dissipation in a surface mount SOD-123 package. Manufactured by Micro Commercial Co, this component is classified as Active and RoHS3 compliant. Zener diodes of this specification are used in voltage regulation, overvoltage protection, and reference circuits where precise voltage clamping is required. Equivalent and substitute parts are identified to support procurement flexibility, inventory management, and supply chain continuity.

Key Parameters

Parameter	Value	Unit
Voltage - Zener (Nom)	6.8	V
Tolerance	±5%	%
Power - Max	500	mW
Impedance (Max)	5	Ohms
Current - Reverse Leakage @ Vr	3	µA @ 5 V
Voltage - Forward (Vf) (Max) @ If	900	mV @ 10 mA
Operating Temperature Range	-55 to 150	°C
Mounting Type	Surface Mount
Package / Case	SOD-123
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MMSZ5235B-TP is determined by the following critical parameters:

Primary Substitution Criteria:

Zener voltage: 6.8 V nominal
Power rating: 500 mW maximum
Package: SOD-123 surface mount
Tolerance: ±5%
Mounting type: Surface mount
Operating temperature range: Minimum -55°C to maximum 150°C
RoHS3 compliance
MSL rating: 1 (Unlimited)

Secondary Compatibility Parameters:

Impedance (Zzt): Maximum 5 Ohms (or higher impedance acceptable in non-critical applications)
Reverse leakage current: 3 µA @ 5 V (or lower leakage acceptable)
Forward voltage: 900 mV @ 10 mA maximum

Substitute parts are classified into three categories:

Direct Manufacturer Equivalents: Parts with identical electrical specifications and packaging from alternative manufacturers (onsemi).
Similar Manufacturer Parts: Parts meeting all primary substitution criteria with minor variations in secondary parameters such as impedance or reverse leakage characteristics (Central Semiconductor Corp, Diodes Incorporated).
Parametric Equivalents: Parts with identical specifications from alternative manufacturers with different packaging options (Vishay General Semiconductor).

Parameter Comparison

Manufacturer Part Number	Manufacturer	Vz (V)	Tolerance	Power (mW)	Zzt (Ohms)	Reverse Leakage @ Vr	Vf (Max) @ If	Temp Range (°C)	Package	Packaging Type
MMSZ5235B-TP	Micro Commercial Co	6.8	±5%	500	5	3 µA @ 5 V	900 mV @ 10 mA	-55 to 150	SOD-123	Cut Tape & Digi-Reel
MMSZ4692T1G	onsemi	6.8	±5%	500	Not specified	10 µA @ 5.1 V	900 mV @ 10 mA	-55 to 150	SOD-123	Tape & Reel
MMSZ6V8T1G	onsemi	6.8	±5%	500	15	2 µA @ 4 V	900 mV @ 10 mA	-55 to 150	SOD-123	Tape & Reel
SZMMSZ4692T1G	onsemi	6.8	±5%	500	Not specified	10 µA @ 5.1 V	900 mV @ 10 mA	-55 to 150	SOD-123	Tape & Reel
SZMMSZ6V8T1G	onsemi	6.8	±5%	500	15	2 µA @ 4 V	900 mV @ 10 mA	-55 to 150	SOD-123	Tape & Reel
CMHZ5235B TR PBFREE	Central Semiconductor Corp	6.8	±5%	500	5	3 µA @ 5 V	900 mV @ 10 mA	-65 to 150	SOD-123	Tape & Reel
DDZ6V8C-7	Diodes Incorporated	6.8	±2.5%	310	5	100 nA @ 5 V	900 mV @ 10 mA	-65 to 150	SOD-123	Tape & Reel
DDZ9692-7	Diodes Incorporated	6.8	±5%	500	Not specified	100 nA @ 5.1 V	900 mV @ 10 mA	-65 to 150	SOD-123	Cut Tape & Digi-Reel
MMSZ5235B-7-F	Diodes Incorporated	6.8	±5%	500	5	3 µA @ 5 V	900 mV @ 10 mA	-65 to 150	SOD-123	Cut Tape & Digi-Reel
MMSZ5235B-E3-08	Vishay General Semiconductor	6.8	±5%	500	5	3 µA @ 5 V	Not specified	-55 to 150	SOD-123	Cut Tape & Digi-Reel
MMSZ5235B-G3-08	Vishay General Semiconductor	6.8	±5%	500	5	3 µA @ 5 V	Not specified	-55 to 150	SOD-123	Tape & Reel

Engineering Selection Recommendations

Full Electrical and Mechanical Equivalents:

The following parts are direct substitutes with identical specifications across all primary and secondary parameters:

MMSZ5235B-7-F (Diodes Incorporated): Identical electrical specifications with extended operating temperature range (-65°C to 150°C). Available in Cut Tape & Digi-Reel packaging. RoHS3 compliant.
MMSZ5235B-E3-08 (Vishay General Semiconductor): Identical electrical specifications. Available in Cut Tape & Digi-Reel packaging. RoHS3 compliant.
MMSZ5235B-G3-08 (Vishay General Semiconductor): Identical electrical specifications. Available in Tape & Reel packaging. RoHS3 compliant.
CMHZ5235B TR PBFREE (Central Semiconductor Corp): Identical electrical specifications with extended operating temperature range (-65°C to 150°C). Available in Tape & Reel packaging. RoHS3 compliant.

Direct Manufacturer Equivalents (onsemi):

MMSZ4692T1G (onsemi): Meets all primary substitution criteria. Reverse leakage current is 10 µA @ 5.1 V (higher than primary part). Available in Tape & Reel packaging. RoHS3 compliant.
MMSZ6V8T1G (onsemi): Meets all primary substitution criteria. Impedance is 15 Ohms (higher than primary part). Reverse leakage current is 2 µA @ 4 V (lower than primary part). Available in Tape & Reel packaging. RoHS3 compliant.

Automotive-Grade Alternatives (onsemi):

SZMMSZ4692T1G (onsemi): Automotive-grade equivalent with AEC-Q101 qualification. Meets all primary substitution criteria. Reverse leakage current is 10 µA @ 5.1 V. Available in Tape & Reel packaging. RoHS3 compliant.
SZMMSZ6V8T1G (onsemi): Automotive-grade equivalent with AEC-Q101 qualification. Meets all primary substitution criteria. Impedance is 15 Ohms. Reverse leakage current is 2 µA @ 4 V. Available in Tape & Reel packaging. RoHS3 compliant.

Lower Power Alternative:

DDZ6V8C-7 (Diodes Incorporated): Meets primary substitution criteria with reduced power rating of 310 mW (versus 500 mW). Tighter tolerance of ±2.5% (versus ±5%). Significantly lower reverse leakage current of 100 nA @ 5 V. Extended operating temperature range (-65°C to 150°C). Available in Tape & Reel packaging. RoHS3 compliant. Suitable for applications where lower power dissipation is acceptable.

Similar Specification Alternative:

DDZ9692-7 (Diodes Incorporated): Meets all primary substitution criteria. Reverse leakage current is 100 nA @ 5.1 V (significantly lower than primary part). Extended operating temperature range (-65°C to 150°C). Available in Cut Tape & Digi-Reel packaging. RoHS3 compliant.

All substitute parts maintain RoHS3 compliance, MSL rating of 1 (Unlimited), and REACH unaffected status consistent with the primary part.

Frequently Asked Questions (FAQ)

Q: Can MMSZ4692T1G be used as a direct replacement for MMSZ5235B-TP?

A: Yes. Both parts share identical Zener voltage (6.8 V), power rating (500 mW), tolerance (±5%), package (SOD-123), and operating temperature range (-55°C to 150°C). The reverse leakage current specification differs (10 µA @ 5.1 V versus 3 µA @ 5 V), which is acceptable in most applications. Packaging differs (Tape & Reel versus Cut Tape & Digi-Reel).

Q: What is the difference between MMSZ6V8T1G and MMSZ5235B-TP?

A: Both parts have identical Zener voltage (6.8 V), power rating (500 mW), tolerance (±5%), package (SOD-123), and operating temperature range (-55°C to 150°C). MMSZ6V8T1G has higher impedance (15 Ohms versus 5 Ohms) and lower reverse leakage current (2 µA @ 4 V versus 3 µA @ 5 V). These differences do not prevent substitution in standard voltage regulation applications.

Q: Is DDZ6V8C-7 suitable as a substitute for MMSZ5235B-TP?

A: DDZ6V8C-7 is a partial substitute. It maintains the 6.8 V Zener voltage, SOD-123 package, and ±5% tolerance range. However, the power rating is reduced to 310 mW (versus 500 mW). This part is suitable only for applications where power dissipation does not exceed 310 mW. The significantly lower reverse leakage current (100 nA) may be beneficial in precision reference circuits.

Q: What is the advantage of automotive-grade parts SZMMSZ4692T1G and SZMMSZ6V8T1G?

A: These parts carry AEC-Q101 automotive qualification and are designated for automotive applications. They meet identical electrical specifications as their non-automotive counterparts (MMSZ4692T1G and MMSZ6V8T1G) but undergo additional qualification testing for automotive environments. Use these parts only when automotive-grade certification is required by design or procurement specifications.

Q: Can I substitute MMSZ5235B-TP with MMSZ5235B-7-F?

A: Yes. MMSZ5235B-7-F is a full electrical equivalent with identical Zener voltage, power rating, tolerance, impedance, and reverse leakage specifications. The operating temperature range is extended (-65°C to 150°C versus -55°C to 150°C). Packaging differs (Cut Tape & Digi-Reel versus Cut Tape & Digi-Reel, same type). Both are RoHS3 compliant.

Q: What packaging options are available for substitute parts?

A: Substitute parts are available in two packaging formats: Cut Tape & Digi-Reel (MMSZ5235B-TP, DDZ9692-7, MMSZ5235B-7-F, MMSZ5235B-E3-08) and Tape & Reel (MMSZ4692T1G, MMSZ6V8T1G, SZMMSZ4692T1G, SZMMSZ6V8T1G, CMHZ5235B TR PBFREE, DDZ6V8C-7, MMSZ5235B-G3-08). Select packaging based on procurement and assembly requirements.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts listed are RoHS3 compliant and REACH unaffected, consistent with the primary part MMSZ5235B-TP.

Q: What is the difference between impedance specifications in substitute parts?

A: Impedance (Zzt) is specified as 5 Ohms for MMSZ5235B-TP. Some substitute parts specify 15 Ohms (MMSZ6V8T1G, SZMMSZ6V8T1G), while others do not specify this parameter. Higher impedance indicates greater dynamic resistance in the Zener region. For most voltage regulation and protection applications, this difference is not critical. Verify impedance requirements for precision reference circuits.

Q: Can I use CMHZ5235B TR PBFREE as a substitute?

A: Yes. CMHZ5235B TR PBFREE is a full electrical equivalent with identical Zener voltage, power rating, tolerance, impedance, and reverse leakage specifications. The operating temperature range is extended (-65°C to 150°C versus -55°C to 150°C). Packaging is Tape & Reel. RoHS3 compliant.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message