SMBJ90C Equivalent & Substitute Parts

Part Overview

The SMBJ90C is a transient voltage suppressor (TVS) diode manufactured by Littelfuse Inc., designed for general-purpose overvoltage protection in surface-mount applications. This component features a 90V reverse standoff voltage with a 153.3V maximum clamping voltage and 4.1A peak pulse current capability in a DO-214AA (SMB) package. The SMBJ90C is classified as obsolete, making identification of active equivalent parts essential for new designs and ongoing production support.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	90	V
Breakdown Voltage (Min)	94.95	V
Clamping Voltage (Max) @ Ipp	153.3	V
Peak Pulse Current (10/1000µs)	4.1	A
Peak Pulse Power	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package Type	DO-214AA, SMB	Surface Mount
Bidirectional Channels	1	—
RoHS Status	ROHS3 Compliant	—
Moisture Sensitivity Level	1 (Unlimited)	—

Substitute Part Grouping Explanation

Substitution of the SMBJ90C is determined by strict equivalence across the following electrical and mechanical parameters:

Reverse standoff voltage: 90V (nominal)
Breakdown voltage minimum: ≥94.95V
Peak pulse current: 4.1A nominal
Peak pulse power: 600W
Package: DO-214AA / SMB surface mount
Bidirectional channels: 1
RoHS3 compliance
MSL rating: 1 (Unlimited)

The substitute parts identified—SMBJ90CA (MDD), SMBJ90CA-E3/52 (Vishay), and TV06B900JB-HF (Comchip)—meet these core electrical specifications. Variations in clamping voltage (146V vs. 153.3V) and operating temperature ranges represent acceptable engineering tolerances within the 90V protection class and do not preclude functional substitution in general-purpose applications.

Parameter Comparison

Parameter	SMBJ90C (Littelfuse)	SMBJ90CA (MDD)	SMBJ90CA-E3/52 (Vishay)	TV06B900JB-HF (Comchip)
Reverse Standoff Voltage (Typ)	90V	90V	90V	90V
Breakdown Voltage (Min)	94.95V	100V	100V	100V
Clamping Voltage (Max) @ Ipp	153.3V	146V	146V	146V
Peak Pulse Current (10/1000µs)	4.1A	4.1A	4.1A	4.11A
Peak Pulse Power	600W	600W	600W	600W
Operating Temperature Range	-65 to 150°C	-50 to 150°C	-55 to 150°C	Not specified
Package / Case	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB	DO-214AA, SMB
Product Status	Obsolete	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All three substitute parts—SMBJ90CA (MDD), SMBJ90CA-E3/52 (Vishay), and TV06B900JB-HF (Comchip)—are classified as active products with full RoHS3 compliance and unlimited moisture sensitivity ratings. These characteristics ensure long-term availability and compliance with current environmental regulations.

SMBJ90CA-E3/52 (Vishay) carries the TransZorb® series designation and represents a mature, widely-adopted standard in the 90V TVS diode category. SMBJ90CA (MDD) offers the highest current inventory (29,200 units), supporting immediate procurement needs. TV06B900JB-HF (Comchip) provides an alternative source with comparable electrical performance and active product status.

Selection among these three substitutes should be based on procurement availability, supply chain requirements, and design qualification timelines rather than electrical performance differences, as all meet the core 90V protection specification.

Frequently Asked Questions (FAQ)

Q: Can SMBJ90CA directly replace SMBJ90C in existing designs?

A: Yes. Both parts share identical reverse standoff voltage (90V), peak pulse current (4.1A), peak pulse power (600W), and DO-214AA package specifications. The clamping voltage difference (146V vs. 153.3V) falls within acceptable engineering tolerance for general-purpose transient suppression.

Q: What is the significance of the clamping voltage variation between SMBJ90C and its substitutes?

A: The SMBJ90C specifies a maximum clamping voltage of 153.3V, while all three substitutes specify 146V. Both values represent the voltage at which the TVS diode clamps transient overvoltage events at the specified peak pulse current. The lower clamping voltage of the substitutes provides marginally improved protection performance and remains within the 90V protection class specification.

Q: Are there temperature range considerations when selecting a substitute?

A: The SMBJ90C operates from -65°C to 150°C (TJ). Substitute parts operate within -50°C to 150°C (MDD, Vishay) or unspecified ranges (Comchip). For applications requiring the full -65°C lower temperature limit, the Vishay SMBJ90CA-E3/52 (-55°C minimum) provides the closest match. For standard industrial applications (-40°C to 85°C ambient), all substitutes are suitable.

Q: Does packaging differ between the main part and substitutes?

A: No. All parts use the DO-214AA (SMB) surface-mount package. The SMBJ90CA (MDD) is supplied in Tape & Reel (TR) packaging, which is standard for high-volume production. This does not affect electrical performance or PCB compatibility.

Q: What compliance certifications apply to these substitute parts?

A: All parts are ROHS3 compliant and carry MSL 1 (Unlimited) moisture sensitivity ratings. SMBJ90CA-E3/52 and TV06B900JB-HF additionally carry REACH Unaffected status. These certifications ensure compliance with current environmental and regulatory requirements for electronics manufacturing.

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