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Vishay General Semiconductor - Diodes Division SA70HE3/54
- Part No.:
- SA70HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA70HE3/54.pdf
- Description:
- TVS DIODE 70VWM 125VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:8,140
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Product details
Overview
SA70HE3/54 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, rated for 70 V stand-off voltage (VWM), 77.8–86.0 V breakdown voltage (VBR), 500 W peak pulse power (10/1000 μs), 4.4 A peak pulse current (IPPM), and 113 V clamping voltage (VC) at IPPM. It protects MOSFETs and ICs against inductive switching transients in automotive power supplies.
For engineers reviewing the SA70HE3/54 datasheet, SA70HE3/54 pinout, SA70HE3/54 application, or SA70HE3/54 equivalent, this page delivers verified electrical parameters, AEC-Q101 qualification status, DO-15 mechanical data, clamping performance under 10/1000 μs surge, and direct alternatives with documented VBR, VC, and packaging differences.
Technical Context
The SA70HE3/54 operates as a uni-directional avalanche diode, conducting only when reverse voltage exceeds its specified VBR range (77.8–86.0 V at 1 mA). Its glass-passivated junction enables fast response (<1 ns) to ESD and lightning-induced surges while maintaining low incremental surge resistance.
Designed for automotive-grade reliability, it meets AEC-Q101 stress testing requirements and supports continuous operation from –55 °C to +175 °C junction temperature. The matte tin-plated leads comply with J-STD-002 solderability and JESD 201 Class 2 whisker resistance standards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 70 V - maximum DC or continuous reverse operating voltage before clamping begins |
| VBR (min/max) | 77.8 V / 86.0 V at 1 mA - guaranteed avalanche initiation window defining turn-on threshold tolerance |
| VC @ IPPM | 113 V at 4.4 A - maximum clamped voltage during 10/1000 μs transient, limiting downstream stress |
| PPPM | 500 W - peak surge power handling capability under standardized 10/1000 μs waveform |
| IFSM | 70 A - non-repetitive forward surge current rating (10 ms half-sine), critical for inrush protection |
| TJ max. | +175 °C - maximum junction temperature enabling under-hood automotive deployment |
| Polarity | Uni-directional - cathode marked with band; blocks forward current until VBR exceeded in reverse |
Pinout & Package
Package: DO-204AC (DO-15), axial leaded, molded epoxy case meeting UL 94 V-0 flammability rating. Dimensions: 3.6 mm diameter × 7.6 mm body length, 25.4 mm minimum lead length.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode | Forward conduction terminal | Connected to lower-potential side of protected circuit; conducts during overvoltage clamp in reverse bias |
| Cathode | Avalanche breakdown terminal | Marked with color band; referenced to system ground or higher-potential rail for uni-directional clamping |
Key Features
| Feature | Design Value |
|---|---|
| Glass passivated junction | Enables stable, repeatable avalanche characteristics and long-term reliability under repetitive surge stress |
| AEC-Q101 qualification | Validated for automotive applications including engine control units and body electronics requiring high-reliability TVS protection |
| 500 W peak pulse power (10/1000 μs) | Supports robust suppression of ISO 7637-2 Pulse 1, 2a, and 5a transients in 12 V vehicle systems |
| Low clamping ratio (VC/VBR ≈ 1.35) | Minimizes voltage overshoot across protected devices, reducing risk of gate oxide rupture in MOSFETs |
| Matte tin plating (J-STD-002 compliant) | Ensures consistent solder wetting and intermetallic formation during reflow or wave soldering processes |
Applications
| Automotive Power Supply Protection | Industrial Motor Drive Inputs |
|---|---|
Use Scenario: Protecting 12 V battery-fed ECUs from load dump and alternator ripple transients. IC Role / Device Role / Timing Role: Uni-directional TVS placed between battery rail and input filter capacitor to clamp spikes above 70 V. Use Value: Limits transient voltage to ≤113 V, preventing damage to downstream LDOs and microcontrollers rated for 16 V absolute max. | Use Scenario: Safeguarding PLC I/O modules connected to 24 V DC motor control lines subject to inductive kickback. IC Role / Device Role / Timing Role: Standoff device mounted across relay coil or H-bridge supply rail to absorb energy from collapsing magnetic fields. Use Value: Absorbs up to 500 W for 1 ms, suppressing >100 V spikes that would otherwise exceed I/O driver breakdown ratings. |
| Telecom Line Interface Protection | Consumer Appliance Power Entry |
Use Scenario: Shielding Ethernet PHY power pins and RS-485 transceivers from ESD and surge events on field wiring. IC Role / Device Role / Timing Role: Primary-level TVS on 3.3 V or 5 V bias rails feeding communication ICs, placed before LC filtering. Use Value: Responds in <1 ns to 8 kV contact ESD (IEC 61000-4-2), clamping to 113 V before downstream silicon sees destructive voltage. | Use Scenario: Securing AC-DC adapter secondary-side outputs in washing machines and HVAC controllers exposed to mains-borne surges. IC Role / Device Role / Timing Role: Final-stage protector on regulated 5 V/12 V rails feeding MCU and display drivers. Use Value: Withstands 70 A IFSM surges from capacitor charging inrush, while maintaining 70 V VWM to avoid false triggering during normal operation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ70A-E3/52 | VBR = 77.8–86.0 V, same DO-214AC package, 400 W PPPM (vs. 500 W), 113 V VC | Lower peak power rating limits use in high-energy load dump scenarios | Select SMAJ70A-E3/52 only if board space requires SMD mounting and surge energy is ≤400 W |
| 1.5KE70A | VBR = 77.8–86.0 V, DO-201AD package, 1500 W PPPM, 118 V VC, 100 A IFSM | Larger case increases PCB footprint but enables higher surge endurance in industrial power supplies | Choose 1.5KE70A where sustained 1.5 kW surge immunity is required and DO-201AD layout is acceptable |
Compared with SMAJ70A-E3/52 and 1.5KE70A, the SA70HE3/54 offers optimal balance of AEC-Q101 qualification, 500 W surge capacity, and compact DO-15 through-hole form factor-making it preferred for automotive and space-constrained industrial designs where reliability and proven qualification outweigh raw power headroom.
Availability
SA70HE3/54 is available at Aetrix Electronics and suitable for automotive electronics, industrial motor controls, and telecom infrastructure requiring stable component supply with full traceability and lifecycle management.
Supply support for SA70HE3/54 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
Vishay General Semiconductor is a global leader in discrete semiconductors, specializing in diodes, rectifiers, MOSFETs, and protection devices with emphasis on reliability, efficiency, and automotive qualification.
The SAxxA series is part of Vishay's TRANSZORB® TVS family, engineered specifically for robust transient suppression in harsh environments-including under-hood automotive, factory automation, and outdoor telecom equipment.
FAQ
What is the clamping voltage of SA70HE3/54 at its rated peak pulse current?
The SA70HE3/54 has a maximum clamping voltage (VC) of 113 V when subjected to its rated peak pulse current (IPPM) of 4.4 A under the standard 10/1000 μs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and ensures predictable voltage limiting during surge events without exceeding safe thresholds for downstream 12 V or 24 V logic components.
Is SA70HE3/54 qualified for automotive applications?
Yes, SA70HE3/54 carries the HE3 suffix, which denotes AEC-Q101 qualification per the Vishay documentation. It undergoes stress testing for temperature cycling, humidity bias, and mechanical shock, making it suitable for engine control units, body control modules, and other automotive subsystems where reliability under thermal and vibration stress is mandatory.
What does the "HE3" suffix indicate in SA70HE3/54?
The "HE3" suffix in SA70HE3/54 specifies RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance. It distinguishes this variant from commercial-grade "E3" versions and confirms compliance with automotive reliability standards, including extended temperature operation up to +175 °C junction temperature.
Can SA70HE3/54 be used in bi-directional protection circuits?
No, SA70HE3/54 is strictly a uni-directional TVS diode, as confirmed by its part number structure (no "CA" suffix) and datasheet specifications. For bi-directional applications-such as AC line or differential signal protection-Vishay recommends SA70CA variants, which feature symmetric breakdown in both polarities and no polarity marking.
What is the maximum steady-state power dissipation for SA70HE3/54?
The SA70HE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at a lead temperature (TL) of 75 °C, as defined in Figure 5 of the Vishay datasheet. Derating is required above 75 °C TL, reaching zero dissipation at 175 °C junction temperature.
SA70HE3/54 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Package/Case:
- DO-204AC, DO-15, Axial
- Series:
- TransZorb®
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Zener
- Unidirectional Channels:
- 1
- Bidirectional Channels:
- -
- Voltage - Reverse Standoff (Typ):
- 70V
- Voltage - Breakdown (Min):
- 77.8V
- Voltage - Clamping (Max) @ Ipp:
- 125V
- Current - Peak Pulse (10/1000µs):
- 4A
- Power - Peak Pulse:
- 500W
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Through Hole
- Supplier Device Package:
- DO-204AC (DO-15)
SA70HE3/54 FAQ
1.How can I place an order for SA70HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA70HE3/54 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 SA70HE3/54 reliable?
The price and inventory of SA70HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA70HE3/54 is usually 5 days.
3.What payment methods are accepted for SA70HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA70HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA70HE3/54?
SA70HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA70HE3/54 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 SA70HE3/54?
For technical support, including SA70HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA70HE3/54 requirements.
6.How does Aetrix verify that SA70HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA70HE3/54 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 SA70HE3/54 meets industry standards.
7.What is the process for return or replacement of SA70HE3/54?
All SA70HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA70HE3/54, 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 SA70HE3/54 part is unused and in its original packaging.
Return procedure for SA70HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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