SMBJ200 Transient Voltage Suppressor (TVS) Diode - Equivalent & Substitute Parts

Part Overview

The SMBJ200 is a unidirectional Zener-type transient voltage suppressor diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. The device features a 200V reverse standoff voltage rating with a 340.2V maximum clamping voltage and 1.9A peak pulse current capability in a DO-214AA (SMB) package format.

The SMBJ200 is classified as obsolete. Equivalent and substitute parts are available from alternative manufacturers with active product status, offering identical or compatible electrical and mechanical specifications suitable for direct replacement in circuit designs.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	200	V
Voltage - Breakdown (Min)	211.95	V
Voltage - Clamping (Max) @ Ipp	340.2	V
Current - Peak Pulse (10/1000µs)	1.9	A
Power - Peak Pulse	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package / Case	DO-214AA, SMB	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMBJ200 is determined by strict equivalence across the following critical parameters:

Voltage Rating: Reverse standoff voltage of 200V (±tolerance as specified by manufacturer)
Clamping Voltage: Maximum clamping voltage at peak pulse current (Ipp)
Peak Pulse Current: 1.9A at 10/1000µs pulse duration
Peak Pulse Power: 600W dissipation capability
Package Format: DO-214AA (SMB) surface-mount configuration
Unidirectional Channels: Single channel Zener-type topology
Environmental Compliance: ROHS3 compliance and MSL rating

All substitute parts listed maintain these core electrical and mechanical parameters within the specified tolerances, ensuring functional equivalence for general-purpose transient voltage suppression applications.

Parameter Comparison

Parameter	SMBJ200 (Littelfuse)	SMBJ200A (MDD)	SMBJ200A-TP (Micro Commercial Co)
Voltage - Reverse Standoff (Typ)	200V	200V	200V
Voltage - Breakdown (Min)	211.95V	224V	224V
Voltage - Clamping (Max) @ Ipp	340.2V	324V	324V
Current - Peak Pulse (10/1000µs)	1.9A	1.9A	1.9A
Power - Peak Pulse	600W	600W	600W
Operating Temperature Range	-65 to 150°C	-50 to 150°C	-55 to 175°C
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

SMBJ200A (MDD) and SMBJ200A-TP (Micro Commercial Co) are functionally equivalent substitutes for the obsolete SMBJ200 (Littelfuse Inc.). Both alternatives maintain the critical electrical specifications: 200V reverse standoff voltage, 1.9A peak pulse current, and 600W peak pulse power dissipation in the identical DO-214AA (SMB) surface-mount package.

The substitute parts differ in clamping voltage performance and operating temperature range:

SMBJ200A (MDD): Clamping voltage of 324V (16V lower than original), operating temperature -50 to 150°C, active product status with high inventory availability (146,100 pcs).
SMBJ200A-TP (Micro Commercial Co): Clamping voltage of 324V, extended operating temperature range -55 to 175°C, supplied in Tape & Reel packaging, active product status with moderate inventory (4,090 pcs).

Both substitute parts are ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity), meeting the environmental and regulatory requirements of the original component. Selection between substitutes depends on application-specific temperature requirements and packaging preferences.

Frequently Asked Questions (FAQ)

Q: Can SMBJ200A (MDD) directly replace SMBJ200 (Littelfuse) in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (200V), peak pulse current (1.9A), and peak pulse power (600W) specifications. The clamping voltage difference (324V vs 340.2V) represents a 4.8% reduction, which remains within acceptable tolerance for general-purpose transient suppression applications. Package format (DO-214AA, SMB) and mounting type (surface mount) are identical.

Q: What is the difference between SMBJ200A and SMBJ200A-TP?

A: Both parts are electrically identical with 200V reverse standoff voltage, 1.9A peak pulse current, and 324V clamping voltage. The primary difference is packaging: SMBJ200A-TP is supplied in Tape & Reel (TR) format for automated assembly, while SMBJ200A is supplied in standard packaging. SMBJ200A-TP also offers an extended operating temperature range (-55 to 175°C vs -50 to 150°C).

Q: Are all substitute parts ROHS3 compliant?

A: Yes. SMBJ200 (Littelfuse), SMBJ200A (MDD), and SMBJ200A-TP (Micro Commercial Co) are all ROHS3 compliant with MSL rating 1 (unlimited moisture sensitivity), meeting environmental and regulatory requirements for commercial and industrial applications.

Q: Does the lower clamping voltage of substitute parts affect circuit protection?

A: The substitute parts feature a clamping voltage of 324V compared to the original 340.2V. This 16V difference represents improved clamping performance (lower voltage at peak pulse current), providing enhanced transient suppression. This is advantageous for protecting sensitive downstream components.

Q: Which substitute part should be selected for high-temperature applications?

A: SMBJ200A-TP (Micro Commercial Co) offers the widest operating temperature range (-55 to 175°C), making it suitable for applications requiring extended high-temperature performance. SMBJ200A (MDD) operates from -50 to 150°C, while the original SMBJ200 operates from -65 to 150°C.

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