My Inquiry
My Account
Microchip Technology SMAJ70AE3/TR13
- Part No.:
- SMAJ70AE3/TR13
- Manufacturer:
- Microchip Technology
- Category:
- TVS Diodes
- Package:
- DO-214AC, SMA
- Datasheet:
-
SMAJ70AE3/TR13.pdf
- Description:
- TVS DIODE 70VWM 113VC DO214AC
- Quantity:
- Payment:
- Shipping:
Inventory:6,101
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SMAJ70AE3/TR13 from Microsemi is a unidirectional surface-mount Transient Voltage Suppressor (TVS) designed for primary overvoltage protection of DC power rails and signal lines. It features a 70 V working peak standoff voltage (VWM), 77.8 V minimum breakdown voltage (VBR), clamps transients to ≤125 V at 4.0 A peak pulse current, and delivers 500 W peak pulse power per 10/1000 µs waveform - used in industrial power supply input stages, telecom line interfaces, and automotive body control modules.
For engineers reviewing the SMAJ70AE3/TR13 datasheet, SMAJ70AE3/TR13 pinout, SMAJ70AE3/TR13 application, or SMAJ70AE3/TR13 equivalent, key selection criteria include its unidirectional polarity, DO-214AC package compatibility, IEC61000-4-2/4-4/4-5 compliance, low standby leakage (<1 µA @ 70 V), and RoHS-compliant matte-tin plating - all critical for high-reliability ESD and lightning surge protection design.
Technical Context
This TVS diode operates as a fast-acting voltage-clamping device in series with protected circuitry, conducting only when reverse voltage exceeds VBR = 77.8 V (min @ 1 mA). Its <100 ps theoretical response time enables suppression of sub-nanosecond ESD events before sensitive ICs are damaged.
The device is rated for 500 W peak pulse power at 25 °C with 0.01% duty cycle, derates linearly above 25 °C per a defined thermal resistance (15 °C/W junction-to-lead), and maintains stable clamping performance across -65 °C to +150 °C operating temperature range - supporting harsh-environment deployments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - Maximum continuous reverse operating voltage before conduction begins; sets upper limit for safe DC rail operation. |
| VBR min | 77.8 V @ 1 mA - Minimum voltage at which device enters avalanche breakdown; ensures reliable triggering above system nominal voltage. |
| VC @ IPP | 125 V @ 4.0 A - Clamped voltage during 10/1000 µs surge; defines worst-case overvoltage seen by downstream components. |
| PPP | 500 W - Peak transient energy absorption capability; determines survivability against standardized lightning surges (IEC61000-4-5). |
| ID max | <1 µA @ 70 V - Reverse leakage current at rated standoff; ensures minimal power loss and no false triggering in low-power circuits. |
| tRESP | <100 ps (theoretical) - Time from overvoltage onset to full conduction; enables protection against human-body-model ESD (IEC61000-4-2). |
| TOP/TSTG | -65 °C to +150 °C - Full operational and storage temperature range; supports under-hood automotive and industrial control applications. |
Pinout & Package
Package: DO-214AC (SMA), surface-mount, void-free thermosetting epoxy case with cathode band marking; moisture sensitivity level (MSL) 1, no dry pack required per J-STD-020B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Low-side reference terminal | Connected to ground or lowest-potential node; completes conduction path during transient clamp event. |
| Cathode | High-side surge input terminal | Connected to protected line (e.g., 24 V rail); marked by visible band; carries full surge current to anode during clamping. |
Key Features
| Feature | Design Value |
|---|---|
| RoHS-compliant matte-tin plating | Meets IPC/JEDEC solderability standards (MIL-STD-750, method 2026); supports lead-free reflow up to 260 °C for 10 s. |
| Unidirectional construction | Enables asymmetric protection on DC-biased lines without forward-conduction interference; avoids rectification effects in AC-coupled paths. |
| 500 W peak pulse rating | Withstands IEC61000-4-5 Class 3 secondary lightning surges (42 Ω source, 1 kV) on 24–48 V systems without degradation. |
| Low thermal resistance | 15 °C/W junction-to-lead enables efficient heat dissipation into PCB copper; supports sustained surge handling on FR4 with 1 oz Cu footprint. |
| IEC61000-4-2/4-4/4-5 compliance | Validated for ESD (±8 kV contact), EFT (±2 kV), and lightning (1 kV/2 kV line-earth) immunity per standard test waveforms. |
Applications
| Industrial Power Input Protection | Telecom Line Interface |
|---|---|
Use Scenario: 24 V DC input stage of programmable logic controller (PLC) exposed to inductive load switching and field wiring faults. IC Role / Device Role / Timing Role: Unidirectional TVS placed between VIN and GND to clamp positive-going transients before they reach DC-DC converter ICs. Use Value: Limits voltage excursion to ≤125 V during 4 A surges, preventing latch-up or gate oxide damage in upstream buck controllers and microcontrollers. |
Use Scenario: RS-485 data line in outdoor base station equipment subject to induced surges from nearby lightning strikes. IC Role / Device Role / Timing Role: TVS mounted differential-line-to-ground to suppress common-mode transients while preserving signal integrity. Use Value: Sub-100 ps response ensures clamping occurs before ±15 kV ESD pulses propagate into transceiver ICs, maintaining bit-error-rate stability. |
| Automotive Body Control Module | Medical Equipment Power Entry |
Use Scenario: 12 V battery feed to BCM module experiencing load-dump and jump-start transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping device on main power rail, coordinated with upstream fuse and downstream LDO regulators. Use Value: Withstands 500 W surges at 125 V clamp level, enabling robust protection without requiring oversized heatsinking or complex multi-stage designs. |
Use Scenario: AC/DC adapter input stage in Class II medical devices requiring reinforced insulation and low leakage. IC Role / Device Role / Timing Role: Standoff-rated TVS on primary-side rectified DC bus to absorb capacitor-charging spikes and external surges. Use Value: <1 µA leakage at 70 V ensures compliance with IEC 60601-1 creepage/clearance and patient-leakage current limits. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70AHE3/TR13 | Same electrical specs, but with 100% temperature cycling screening (-55 °C to +125 °C, 10X) and HTRB testing per avionics grade requirements. | Required for aerospace, defense, or high-reliability industrial programs demanding extended qualification beyond commercial grade. | Select SMAJ70AHE3/TR13 only if MIL-PRF-19500 JANTX-level reliability or avionics-grade screening is mandated in your BOM. |
| SMBJ70A-E3/52 | Higher 600 W peak pulse power, same VWM/VBR/VC, but in larger DO-214AA (SMB) package with 20% greater thermal mass and 22% higher IPP (4.4 A). | Better suited for higher-energy surge environments (e.g., outdoor PoE switches) where board space allows SMB footprint. | Choose SMBJ70A-E3/52 if system-level surge testing requires >500 W margin or thermal derating headroom is needed at elevated ambient temperatures. |
Compared with SMAJ70AE3/TR13, SMAJ70AHE3/TR13 adds avionics-grade screening without changing electrical behavior, while SMBJ70A-E3/52 trades compact DO-214AC size for higher surge capacity and thermal robustness - making each alternative optimal only under specific reliability or power-handling constraints.
Availability
SMAJ70AE3/TR13 is available at Aetrix Electronics and suitable for industrial power input protection, telecom line interface, and automotive body control module applications requiring stable component supply, RoHS compliance, and IEC61000-4-2/4-4/4-5 certified surge immunity.
Supply support for SMAJ70AE3/TR13 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Microsemi (now part of Microchip Technology) is a U.S.-based semiconductor company specializing in high-reliability analog, mixed-signal, and radiation-hardened components for aerospace, defense, and industrial markets.
The SMAJ series was engineered for cost-effective, surface-mount transient suppression in space-constrained DC power and signal lines - balancing 500 W surge capability, sub-100 ps response, and commercial-grade manufacturability.
FAQ
What is the maximum clamping voltage of SMAJ70AE3/TR13 at its rated peak pulse current?
The SMAJ70AE3/TR13 clamps to a maximum of 125 V when subjected to its specified 4.0 A peak pulse current (10/1000 µs waveform). This value is guaranteed per Microsemi's datasheet Figure 2 and defines the upper voltage limit imposed on protected circuitry during standardized surge events - critical for ensuring downstream ICs remain within absolute maximum ratings.
Is SMAJ70AE3/TR13 unidirectional or bidirectional, and how is polarity identified?
SMAJ70AE3/TR13 is a unidirectional TVS diode, indicated by the absence of "C" or "CA" in its part number suffix. Polarity is marked by a visible cathode band on the DO-214AC package body; the banded end connects to the protected line (high-side), while the unbanded end connects to ground (low-side) - essential for correct placement in DC-biased circuits.
Does SMAJ70AE3/TR13 meet IEC61000-4-5 for lightning surge immunity?
Yes, SMAJ70AE3/TR13 is validated for secondary lightning surge protection per IEC61000-4-5 with 42 Ω source impedance up to Class 3 (1 kV line-earth), and with 12 Ω source impedance up to Class 2 (1 kV line-earth). Its 500 W peak pulse rating and 125 V clamping voltage directly support these test levels in 24–48 V systems.
What is the standoff voltage and leakage current specification for SMAJ70AE3/TR13?
SMAJ70AE3/TR13 has a 70 V working peak standoff voltage (VWM) and guarantees maximum reverse standby current (ID) of less than 1 µA at that voltage and 25 °C. This low leakage ensures minimal power loss in always-on systems and prevents false triggering in high-impedance sensing nodes.
Can SMAJ70AE3/TR13 be used in automotive applications compliant with ISO 7637-2?
Yes, SMAJ70AE3/TR13 is suitable for ISO 7637-2 Pulse 1 (inductive load dump) and Pulse 3a/b (switching transients) protection in 12 V automotive systems. Its 125 V clamping voltage and 500 W rating align with typical Pulse 1 energy requirements, though system-level validation against Pulse 5a (load dump) may require coordination with upstream fusing and TVS derating.
SMAJ70AE3/TR13 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Package/Case:
- DO-214AC, SMA
- Series:
- -
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 113V
- Current - Peak Pulse (10/1000µs):
- 4.4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- General Purpose
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -65°C ~ 150°C (TJ)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AC (SMA)
SMAJ70AE3/TR13 FAQ
1.How can I place an order for SMAJ70AE3/TR13 through Aetrix?
Please submit a Request for Quotation (RFQ) for SMAJ70AE3/TR13 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMAJ70AE3/TR13 reliable?
The price and inventory of SMAJ70AE3/TR13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMAJ70AE3/TR13 is usually 5 days.
3.What payment methods are accepted for SMAJ70AE3/TR13?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMAJ70AE3/TR13 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMAJ70AE3/TR13?
SMAJ70AE3/TR13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMAJ70AE3/TR13 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMAJ70AE3/TR13?
For technical support, including SMAJ70AE3/TR13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMAJ70AE3/TR13 requirements.
6.How does Aetrix verify that SMAJ70AE3/TR13 is sourced from the original manufacturer or authorized distributors?
All SMAJ70AE3/TR13 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMAJ70AE3/TR13 meets industry standards.
7.What is the process for return or replacement of SMAJ70AE3/TR13?
All SMAJ70AE3/TR13 units undergo pre-shipment inspection (PSI). If there is an issue with SMAJ70AE3/TR13, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMAJ70AE3/TR13 part is unused and in its original packaging.
Return procedure for SMAJ70AE3/TR13:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMAJ70AE3/TR13 Tags
-
ESD9B5.0ST5G
onsemi
-
DESD3V3E1BL-7B
Diodes Incorporated
-
ESD5Z3.3T1G
onsemi
-
D5V0H1B2LP-7B
Diodes Incorporated
-
D5V0P1B2LP-7B
Diodes Incorporated
-
DESD5V0U1BA-7
Diodes Incorporated
-
ESD5Z5.0T1G
onsemi
-
DESD5V0U1BB-7
Diodes Incorporated
-
D12V0L1B2LP-7B
Diodes Incorporated
-
PESD2V0Y1BSFYL
Nexperia USA Inc.
-
DF2S5M4CT,L3F
Toshiba Semiconductor and Storage
-
D5V0L1B2WS-7
Diodes Incorporated
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
