SMAJ70A M2G Taiwan Semiconductor TVS Diode (Uni-directional) (Diodes Moulded) In Stock
Taiwan Semiconductor SMAJ70A M2G is a unidirectional 70 V, 400 W TVS diode in a 2-pin SMA (DO-214AC) surface-mount package, providing fast transient voltage suppression for protection of semiconductor components and circuits against electrostatic discharge, lightning surges, and inductive switching transients.
- Manufacturer
- Taiwan Semiconductor
- Package
- Diodes Moulded
- Pin Count
- 2
- Lifecycle
- ACTIVE
- Datasheet
- SMAJ70A M2G Datasheet PDF
- Category
- TVS Diode (Uni-directional)
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 70 V standoff voltage, 400 W peak pulse power dissipation at 10/1000 µs waveform
- Unidirectional clamping for single-polarity transient protection on DC rails
- Fast response time less than 1 ps for effective ESD and surge suppression
- SMA (DO-214AC) 2-pin SMD package for automated PCB assembly
- RoHS compliant lead-free (M2G suffix) construction
Applications
The SMAJ70A M2G is used to protect input/output lines, power rails, and communication bus interfaces in industrial equipment, automotive electronics, and telecommunications systems against transient overvoltage events up to 400 W peak. Its 70 V standoff voltage makes it suitable for clamping protection on 48 V DC bus lines, relay driver circuits, and motor control systems subject to inductive switching transients.
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
Alternate & Equivalent Parts
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What peak pulse power can the SMAJ70A M2G absorb, and over what waveform duration is it rated?
The SMAJ70A M2G is rated for 400 W peak pulse power dissipation measured at the standard 10/1000 µs (10 µs rise, 1000 µs decay) waveform, enabling it to absorb substantial transient energy from inductive load switching or lightning-induced surges on 70 V standoff circuits.
Which 48 V DC bus protection scenarios is the SMAJ70A M2G best suited for in industrial equipment?
With a 70 V standoff voltage and 400 W surge capability, the SMAJ70A M2G effectively protects 48 V DC bus lines in industrial motor drives, relay output modules, and fieldbus interfaces against inductive kickback spikes and ESD transients, clamping the voltage before it exceeds semiconductor breakdown ratings.
How does the SMA package of the SMAJ70A M2G compare to through-hole TVS diodes for space-constrained PCB designs?
The SMA (DO-214AC) package of the SMAJ70A M2G offers a low-profile 2-pin SMD footprint approximately 4.4 mm × 2.7 mm, replacing bulkier DO-201 or DO-15 through-hole TVS diodes while maintaining the same 400 W pulse power rating and enabling wave-soldering-free automated SMT assembly.
Is the SMAJ70A M2G RoHS compliant, and what does the M2G suffix indicate for regulatory traceability?
Yes, the M2G suffix on the SMAJ70A M2G indicates a lead-free, RoHS compliant matte tin finish on the SMA package terminals, satisfying EU RoHS Directive requirements and supporting REACH compliance documentation for systems sold in regulated markets requiring hazardous substance declarations.
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