NP0640SAT3G Equivalent & Substitute Parts

Part Overview

The NP0640SAT3G is a 58V off-state thyristor TVS (Transient Voltage Suppressor) in DO-214AA SMB package manufactured by onsemi. This component is classified as obsolete, making substitute parts necessary for new designs and ongoing production requirements. The part operates with a 77V breakover voltage, 4V on-state voltage, and handles 50A peak pulse current (10/1000µs). Equivalent and substitute parts must maintain compatibility across voltage ratings, package type, and current handling specifications.

Key Parameters

Parameter	NP0640SAT3G
Voltage - Off State	58V
Voltage - Breakover	77V
Voltage - On State	4V
Current - Peak Pulse (10/1000µs)	50A
Current - Hold (Ih)	150mA
Package / Case	DO-214AA, SMB
Mounting Type	Surface Mount
Number of Elements	1
Capacitance	84pF

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following parameters:

Voltage - Off State: Must be 58V (primary criterion for transient suppression function)
Voltage - Breakover: Must be 77V or within acceptable tolerance
Package / Case: Must be DO-214AA, SMB (mechanical and thermal compatibility)
Mounting Type: Must be Surface Mount
Current - Hold (Ih): Must be 150mA (holding current specification)
Number of Elements: Must be 1

Substitute parts are grouped by their current-handling capability (peak pulse current at 8/20µs and 10/1000µs ratings), as this parameter varies across available alternatives while maintaining the core voltage and package specifications.

Parameter Comparison

Part Number	Manufacturer	Voltage - Off State	Voltage - Breakover	Voltage - On State	Current - Peak Pulse (10/1000µs)	Current - Hold (Ih)	Capacitance	Product Status
NP0640SAT3G	onsemi	58V	77V	4V	50A	150mA	84pF	Obsolete
P0640SALRP	Littelfuse Inc.	58V	77V	4V	45A	150mA	60pF	Active
SMTPA62	STMicroelectronics	62V	82V	—	50A	150mA	40pF	Active
TB0640H-13-F	Diodes Incorporated	58V	77V	4.6V	100A	150mA	200pF	Active
TB0640L-13-F	Diodes Incorporated	58V	77V	4.6V	30A	150mA	100pF	Active
TB0640M-13-F	Diodes Incorporated	58V	77V	4.6V	50A	150mA	140pF	Active
TISP4070H3BJR-S	Bourns Inc.	58V	70V	3V	100A	150mA	140pF	Active
TISP4070J1BJR-S	Bourns Inc.	58V	70V	—	200A	20mA	200pF	Active
TISP4070J3BJR-S	Bourns Inc.	58V	70V	—	200A	150mA	200pF	Active
TISP4070M3BJR-S	Bourns Inc.	58V	70V	3V	50A	150mA	87pF	Active
TISP5070H3BJR-S	Bourns Inc.	58V	70V	3V	100A	150mA	365pF	Active

Engineering Selection Recommendations

Direct Equivalents (Recommended Primary Substitutes)

P0640SALRP (Littelfuse Inc.) and TB0640M-13-F (Diodes Incorporated) provide the closest electrical match to NP0640SAT3G. Both maintain 58V off-state voltage, 77V breakover voltage, 150mA holding current, and 50A peak pulse current at 10/1000µs. Both are active products with RoHS3 compliance and unlimited moisture sensitivity level. P0640SALRP is available in Tape & Reel packaging, while TB0640M-13-F offers the same packaging option.

Higher Current Capability Alternatives

TB0640H-13-F, TISP4070H3BJR-S, and TISP5070H3BJR-S support 100A peak pulse current (10/1000µs), providing increased transient suppression capacity. These parts maintain the 58V off-state and 150mA holding current specification. TISP4070H3BJR-S and TISP5070H3BJR-S feature 70V breakover voltage (lower than the original 77V). All three are active products with RoHS3 compliance.

Extended Current Range Options

TISP4070J1BJR-S and TISP4070J3BJR-S support 200A peak pulse current (10/1000µs) for applications requiring maximum transient suppression. TISP4070J3BJR-S maintains 150mA holding current matching the original specification, while TISP4070J1BJR-S operates at 20mA holding current. Both feature 70V breakover voltage and are active products with RoHS3 compliance.

Lower Current Alternative

TB0640L-13-F provides 30A peak pulse current (10/1000µs) for applications with reduced transient energy requirements. It maintains 58V off-state voltage, 77V breakover voltage, and 150mA holding current. This part is active with RoHS3 compliance.

Voltage Variant

SMTPA62 (STMicroelectronics) operates at 62V off-state and 82V breakover voltage, representing a higher voltage rating. It maintains 150mA holding current and 50A peak pulse current (10/1000µs). This part is active with RoHS3 compliance and is suitable only for applications tolerating the elevated voltage specification.

Frequently Asked Questions (FAQ)

Q: Can I use TISP4070J1BJR-S as a direct replacement for NP0640SAT3G?

A: TISP4070J1BJR-S maintains the 58V off-state voltage and DO-214AA SMB package, but operates at 20mA holding current instead of 150mA. This lower holding current may affect circuit behavior in applications designed for the original 150mA specification. TISP4070J3BJR-S is the preferred Bourns alternative, as it maintains 150mA holding current.

Q: What is the difference between TB0640M-13-F and TB0640H-13-F?

A: Both parts are manufactured by Diodes Incorporated and maintain 58V off-state voltage and 77V breakover voltage in DO-214AA SMB package. TB0640M-13-F handles 50A peak pulse current (10/1000µs), matching the original NP0640SAT3G specification. TB0640H-13-F provides higher current capability at 100A peak pulse current (10/1000µs), suitable for applications requiring increased transient suppression capacity.

Q: Is SMTPA62 compatible with my circuit designed for NP0640SAT3G?

A: SMTPA62 operates at 62V off-state and 82V breakover voltage, compared to the original 58V and 77V specifications. The higher voltage rating may alter circuit protection characteristics. Use SMTPA62 only if your application circuit is designed to tolerate the elevated voltage specification.

Q: Can I substitute parts with different capacitance values?

A: Capacitance values vary across substitute parts (40pF to 365pF). Capacitance affects circuit impedance and high-frequency response. Verify that the substitute part's capacitance is compatible with your circuit's frequency response requirements and signal integrity specifications.

Q: What packaging options are available for substitute parts?

A: All substitute parts are available in DO-214AA SMB surface mount package, matching the original NP0640SAT3G. Packaging options vary between manufacturers: Littelfuse and Diodes Incorporated offer Tape & Reel (TR) packaging, while Bourns Inc. offers both Tape & Reel (TR) and Cut Tape (CT) & Digi-Reel® options.

Q: Are all substitute parts RoHS3 compliant?

A: All listed substitute parts are RoHS3 compliant. The original NP0640SAT3G does not specify RoHS status. All substitute parts maintain REACH Unaffected or REACH Affected status and EAR99 export classification.

Q: Which substitute part should I select for new designs?

A: For new designs requiring direct electrical equivalence, select P0640SALRP (Littelfuse Inc.) or TB0640M-13-F (Diodes Incorporated). Both maintain the original 50A peak pulse current specification, 58V off-state voltage, 77V breakover voltage, and 150mA holding current. Both are active products with established supply chains and RoHS3 compliance.

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