SMAJ8.5CA-M3/61 Equivalent & Substitute Parts

Part Overview

The SMAJ8.5CA-M3/61 is a transient voltage suppressor (TVS) diode manufactured by Vishay General Semiconductor - Diodes Division. This bidirectional Zener diode operates in the DO-214AC (SMA) surface mount package and is designed for general-purpose transient voltage suppression applications. The part is active in production status with ROHS3 compliance and unlimited moisture sensitivity level (MSL 1). Equivalent and substitute parts are identified based on matching electrical characteristics, package compatibility, and operational parameters that ensure functional interchangeability in circuit protection applications.

Key Parameters

Parameter	Value	Unit
Voltage - Reverse Standoff (Typ)	8.5	V
Voltage - Breakdown (Min)	9.44	V
Voltage - Clamping (Max) @ Ipp	14.4	V
Current - Peak Pulse (10/1000µs)	27.8	A
Power - Peak Pulse	400	W
Package / Case	DO-214AC, SMA	-
Operating Temperature Range	-55°C ~ 150°C	TJ
Type	Zener	-
Bidirectional Channels	1	-
RoHS Status	ROHS3 Compliant	-

Substitute Part Grouping Explanation

Substitution eligibility for the SMAJ8.5CA-M3/61 is determined by the following critical parameters:

Primary Matching Criteria:

Voltage - Reverse Standoff (Typ): 8.5V
Voltage - Breakdown (Min): 9.44V (±tolerance)
Package / Case: DO-214AC, SMA
Mounting Type: Surface Mount
Type: Zener, Bidirectional

Secondary Compatibility Factors:

Voltage - Clamping (Max) @ Ipp: 14.4V (allowable range)
Current - Peak Pulse: 27.8A minimum
Power - Peak Pulse: 400W minimum
Operating Temperature: -55°C ~ 150°C (minimum range)
RoHS Status: ROHS3 Compliant

Parts are grouped into two categories: direct equivalents (identical electrical specifications and package) and functional substitutes (matching core voltage and package parameters with acceptable variations in peak current or clamping voltage within application tolerance).

Parameter Comparison

Part Number	Manufacturer	Voltage - Reverse Standoff (V)	Voltage - Breakdown (V)	Voltage - Clamping (V)	Current - Peak Pulse (A)	Power - Peak Pulse (W)	Operating Temp (°C)	Package	RoHS Status
SMAJ8.5CA-M3/61	Vishay	8.5	9.44	14.4	27.8	400	-55 ~ 150	DO-214AC, SMA	ROHS3
SMAJ8.5CA-E3/61	Vishay	8.5	9.44	14.4	27.8	400	-55 ~ 150	DO-214AC, SMA	ROHS3
SMAJ8.5CA	MDD	8.5	9.44	14.4	27.8	400	-50 ~ 150	DO-214AC, SMA	ROHS3
SMAJ8.5CA-13-F	Diodes Incorporated	8.5	9.44	14.4	27.7	400	-55 ~ 150	DO-214AC, SMA	ROHS3
SMA6J8.5CA-TR	STMicroelectronics	8.5	9.4	18.7	205	600	-55 ~ 175	DO-214AC, SMA	ROHS3
SMAJ8.5CA-TP	Micro Commercial Co	8.5	9.44	14.4	27.7	400	-55 ~ 175	DO-214AC, SMA	ROHS3
SMAJ8.5CA-TR	STMicroelectronics	8.5	9.4	19.5	124	400	-55 ~ 150	DO-214AC, SMA	ROHS3

Engineering Selection Recommendations

Direct Equivalents (Identical Specifications): SMAJ8.5CA-E3/61 (Vishay) and SMAJ8.5CA-13-F (Diodes Incorporated) are direct functional equivalents with matching voltage ratings, clamping characteristics, and peak pulse current within 0.1A variance. Both maintain ROHS3 compliance and the required operating temperature range.

Functional Substitutes (Acceptable Parameter Variance): SMAJ8.5CA (MDD) matches all critical electrical parameters with a minimum operating temperature of -50°C instead of -55°C. This substitution is acceptable for applications not requiring the full -55°C lower temperature limit.

SMAJ8.5CA-TP (Micro Commercial Co) provides identical electrical performance with an extended upper operating temperature of 175°C, offering enhanced thermal margin for high-temperature environments.

Limited Substitutes (Higher Performance Characteristics): SMA6J8.5CA-TR (STMicroelectronics) and SMAJ8.5CA-TR (STMicroelectronics) exhibit higher clamping voltages (18.7V and 19.5V respectively) and significantly higher peak pulse current ratings. These parts provide superior transient suppression capability but are suitable only for applications where higher clamping voltage is acceptable.

All substitute parts maintain ROHS3 compliance, DO-214AC (SMA) package compatibility, and active production status.

Frequently Asked Questions (FAQ)

Q: Can SMAJ8.5CA-E3/61 replace SMAJ8.5CA-M3/61 directly? A: Yes. SMAJ8.5CA-E3/61 is a direct equivalent with identical voltage ratings (8.5V standoff, 9.44V breakdown, 14.4V clamping), peak pulse current (27.8A), power rating (400W), and operating temperature range (-55°C ~ 150°C). Both are Vishay TransZorb® series devices in DO-214AC (SMA) package.

Q: What is the difference between SMAJ8.5CA-13-F and the main part? A: SMAJ8.5CA-13-F (Diodes Incorporated) matches all critical electrical parameters with peak pulse current of 27.7A (0.1A lower). Operating temperature range is identical (-55°C ~ 150°C). This 0.1A variance is within acceptable tolerance for general-purpose transient suppression applications.

Q: Why do SMA6J8.5CA-TR and SMAJ8.5CA-TR have higher clamping voltages? A: These STMicroelectronics parts (SMA6J and SMAJ series) are designed with higher clamping voltage specifications (18.7V and 19.5V respectively) and significantly higher peak pulse current ratings (205A and 124A). They provide enhanced transient suppression performance but are suitable only for applications where higher clamping voltage does not compromise circuit protection requirements.

Q: Is SMAJ8.5CA (MDD) compatible with the original part? A: SMAJ8.5CA (MDD) is compatible for most applications. It matches all electrical specifications but has a minimum operating temperature of -50°C instead of -55°C. Use this substitute only if your application does not require operation below -50°C.

Q: Are all substitute parts in the same DO-214AC (SMA) package? A: Yes. All listed substitute parts use the DO-214AC (SMA) surface mount package, ensuring mechanical and footprint compatibility with the original SMAJ8.5CA-M3/61.

Q: Do all parts meet RoHS3 compliance? A: Yes. All substitute parts listed are ROHS3 compliant with MSL 1 (unlimited moisture sensitivity level), matching the environmental and regulatory requirements of the main part.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message