SMBJ9.0C Transient Voltage Suppressor Equivalent & Substitute Parts

Part Overview

The SMBJ9.0C is a 9V Zener transient voltage suppressor diode manufactured by Littelfuse Inc. in DO-214AA (SMB) surface mount package. This component is classified as obsolete, necessitating identification of active equivalent parts for new designs and ongoing production requirements. The SMBJ9.0C series provides general-purpose transient voltage suppression with a 9V reverse standoff voltage and 16.17V maximum clamping voltage at peak pulse current.

Key Parameters

Parameter	Value	Unit
Reverse Standoff Voltage (Typ)	9	V
Breakdown Voltage (Min)	9.5	V
Clamping Voltage (Max) @ Ipp	16.17	V
Peak Pulse Current (10/1000µs)	39	A
Peak Pulse Power	600	W
Operating Temperature Range	-65 to 150	°C (TJ)
Package Type	DO-214AA (SMB)	—
Mounting Type	Surface Mount	—
RoHS Status	ROHS3 Compliant	—

Substitute Part Grouping Explanation

Substitution of the SMBJ9.0C is determined by the following critical parameters:

Reverse standoff voltage: 9V (nominal)
Breakdown voltage minimum: 9.5V to 10V range
Clamping voltage maximum: 15.4V to 16.9V range
Peak pulse current: 35.5A to 51.9A
Peak pulse power: 600W to 800W
Package: DO-214AA (SMB) surface mount
Mounting type: Surface mount
Operating temperature: -55°C to 175°C minimum range
RoHS3 compliance required

All identified substitute parts maintain the 9V nominal standoff voltage and DO-214AA package footprint. Variations in clamping voltage (15.4V to 16.9V) and peak pulse current (35.5A to 51.9A) remain within acceptable tolerance for general-purpose transient suppression applications. All substitutes are active products with current manufacturing status.

Parameter Comparison

Manufacturer Part Number	Manufacturer	Standoff Voltage (V)	Breakdown Min (V)	Clamp Voltage Max (V)	Peak Pulse Current (A)	Peak Power (W)	Temp Range (°C)	Status
SMBJ9.0C	Littelfuse Inc.	9	9.5	16.17	39	600	-65 to 150	Obsolete
SMBJ9.0CA	Taiwan Semiconductor Corporation	9	10	15.4	40	600	-55 to 150	Active
SMB8J9.0CA-E3/5B	Vishay General Semiconductor	9	10	15.4	51.9	800	-55 to 150	Active
SMB8J9.0CA-E3/52	Vishay General Semiconductor	9	10	15.4	51.9	800	-55 to 150	Active
SMBJ9.0CA-13-F	Diodes Incorporated	9	10	15.4	39	600	-55 to 150	Active
SMBJ9.0CA-E3/5B	Vishay General Semiconductor	9	10	15.4	39	600	-55 to 150	Active
SMBJ9.0CA-TP	Micro Commercial Co	9	10	15.4	39	600	-55 to 175	Active
SMBJ9.0CE3/TR13	Microchip Technology	9	10	16.9	35.5	600	-65 to 150	Active
TV06B9V0JB-G	Comchip Technology	9	10	15.4	38.96	600	Not specified	Active

Engineering Selection Recommendations

All substitute parts listed maintain active manufacturing status and ROHS3 compliance. Selection among equivalents depends on specific application requirements:

SMBJ9.0CA (Taiwan Semiconductor Corporation) provides the most direct replacement with matching 9V standoff voltage, 15.4V clamping voltage, and 40A peak pulse current. This part offers the highest inventory availability (23,200 units) and active product status.

SMB8J9.0CA-E3/5B and SMB8J9.0CA-E3/52 (Vishay General Semiconductor) offer enhanced performance with 51.9A peak pulse current and 800W peak power rating, providing margin above the original specification. These are manufacturer-recommended alternatives with active status.

SMBJ9.0CA-TP (Micro Commercial Co) extends the operating temperature range to -55°C to 175°C, suitable for applications requiring higher temperature performance. This part maintains 39A peak pulse current matching the original specification.

SMBJ9.0CE3/TR13 (Microchip Technology) provides clamping voltage of 16.9V, closest to the original SMBJ9.0C specification of 16.17V, with operating temperature range of -65°C to 150°C matching the original.

SMBJ9.0CA-13-F (Diodes Incorporated) offers the highest inventory availability (98,300 units) with matching electrical specifications to the SMBJ9.0CA baseline.

All parts are RoHS3 compliant with MSL rating of 1 (Unlimited) and identical package footprint (DO-214AA SMB).

Frequently Asked Questions (FAQ)

Q: Can SMBJ9.0CA directly replace SMBJ9.0C?

A: Yes. Both parts maintain 9V reverse standoff voltage and DO-214AA package. The SMBJ9.0CA has slightly lower clamping voltage (15.4V vs 16.17V) and marginally higher peak pulse current (40A vs 39A), remaining within acceptable tolerance for general-purpose transient suppression.

Q: What is the difference between SMBJ9.0CA and SMB8J9.0CA-E3/5B?

A: Both maintain identical electrical specifications (9V standoff, 15.4V clamp). The SMB8J9.0CA-E3/5B provides higher peak pulse current (51.9A vs 40A) and peak power (800W vs 600W), offering additional margin. The SMB8 designation indicates enhanced performance rating.

Q: Are all substitutes pin-compatible with SMBJ9.0C?

A: Yes. All listed substitutes use DO-214AA (SMB) package with identical pinout and footprint, enabling direct PCB replacement without layout modification.

Q: Which substitute has the closest clamping voltage to the original SMBJ9.0C?

A: SMBJ9.0CE3/TR13 (Microchip Technology) with 16.9V clamping voltage is closest to the original 16.17V specification.

Q: What is the temperature range consideration for substitution?

A: The original SMBJ9.0C operates -65°C to 150°C. Most substitutes operate -55°C to 150°C. SMBJ9.0CA-TP extends to 175°C. SMBJ9.0CE3/TR13 matches the original -65°C lower limit. Verify application temperature requirements before selection.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited).

Q: Which substitute offers the best inventory availability?

A: SMBJ9.0CA-13-F (Diodes Incorporated) with 98,300 units in stock, followed by SMBJ9.0CA (Taiwan Semiconductor Corporation) with 23,200 units.

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