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Vishay General Semiconductor - Diodes Division SA43HE3/54
- Part No.:
- SA43HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA43HE3/54.pdf
- Description:
- TVS DIODE 43VWM 76.7VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:5,265
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Product details
Overview
SA43HE3/54 from Vishay General Semiconductor is a uni-directional Transient Voltage Suppressor (TVS) diode in DO-204AC (DO-15) package, designed for primary overvoltage protection of DC power rails and signal lines. It features a 43 V stand-off voltage (VWM), 47.8–52.8 V breakdown voltage (VBR) at 1 mA, 69.4 V maximum clamping voltage (VC) at 7.2 A peak pulse current (IPPM), and 500 W peak pulse power rating with 10/1000 µs waveform.
For engineers reviewing the SA43HE3/54 datasheet, SA43HE3/54 pinout, SA43HE3/54 application, or SA43HE3/54 equivalent, this AEC-Q101-qualified TVS diode supports automotive body electronics, industrial I/O protection, and DC power supply surge suppression where fast response (<1 ns), low clamping ratio, and robust 175 °C junction temperature capability are required.
Technical Context
The SA43HE3/54 operates as a uni-directional avalanche diode, conducting only in reverse bias above its breakdown threshold to shunt transient energy to ground. Its glass-passivated junction ensures stable VBR tolerance (±5 %) and low leakage (<1.0 µA at 43 V), while the DO-204AC package provides mechanical robustness and thermal performance up to 3.0 W steady-state dissipation at TL = 75 °C.
It delivers 70 A non-repetitive forward surge current (IFSM) capability and maintains clamping performance across -55 °C to +175 °C operating junction temperature range. The device is rated for 0.01 % duty cycle repetitive transients and complies with JESD22-B102 solderability and JESD201 Class 2 whisker resistance requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 43 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin. |
| VBR min/max | 47.8 V / 52.8 V at IT = 1 mA - Tight 5 % tolerance ensures predictable turn-on across production lots. |
| VC @ IPPM | 69.4 V at 7.2 A (10/1000 µs) - Low clamping voltage limits stress on downstream ICs during ESD or load dump events. |
| PPPM | 500 W - Sustains high-energy transients (e.g., ISO 7637-2 Pulse 5a) without failure under defined waveform conditions. |
| TJ max | +175 °C - Enables deployment in under-hood automotive environments and high-ambient industrial enclosures. |
| IFSM | 70 A (10 ms half-sine) - Withstands high-current inrush or fault currents without bond wire fusing. |
| Leakage ID | <1.0 µA at 43 V - Minimizes standby power loss and avoids false triggering in high-impedance sensing circuits. |
Pinout & Package
SA43HE3/54 uses the DO-204AC (DO-15) axial-leaded package: molded epoxy case with matte tin-plated leads, 0.300" (7.6 mm) minimum lead length, and cathode indicated by a color band on the anode-end-marked body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (banded end) | Current entry terminal in forward bias; connected to protected line side | Provides low forward voltage drop (VF ≤ 3.5 V at 100 A) during surge conduction; polarity must match circuit grounding scheme. |
| Cathode (non-banded end) | Current exit terminal in forward bias; tied to system ground or return path | Serves as reference node for clamping action; requires low-inductance ground connection to maintain sub-nanosecond response. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures long-term VBR stability and low parameter drift over temperature and lifetime, critical for automotive AEC-Q101 compliance. |
| AEC-Q101 qualification | Validates reliability for automotive applications including engine control units, lighting modules, and body control modules. |
| 500 W peak pulse power (10/1000 µs) | Supports stringent ISO 7637-2 and IEC 61000-4-5 surge immunity requirements without derating at TA ≤ 85 °C. |
| Low incremental surge resistance | Enables tight clamping (VC/VBR ≈ 1.45) and minimizes voltage overshoot during fast-rising transients (e.g., ESD). |
| JESD201 Class 2 whisker resistance | Prevents tin whisker growth under thermal cycling and humidity, ensuring long-term solder joint integrity in harsh environments. |
Applications
| Automotive Power Rail Protection | Industrial Sensor Interface Protection |
|---|---|
|
Use Scenario: Protecting 48 V battery-fed ECUs against load dump transients per ISO 7637-2 Pulse 5a. IC Role / Device Role / Timing Role: Primary clamping element placed between power input and DC/DC converter input stage. Use Value: Limits voltage to ≤69.4 V during 100 V/350 ms transients, preventing damage to downstream regulators and microcontrollers. |
Use Scenario: Shielding 24 V analog sensor outputs (e.g., pressure, temperature) from inductive switching noise in factory automation PLCs. IC Role / Device Role / Timing Role: Fast-acting shunt protector on signal line, grounded at controller end. Use Value: Responds in <1 ns to suppress >1 kV spikes, preserving ADC accuracy and avoiding false triggers in safety-critical loops. |
| DC Power Supply Input Stage | Telecom Line Card Surge Protection |
|
Use Scenario: Guarding AC/DC adapter outputs against back-EMF from relay coils and motor drivers in embedded power supplies. IC Role / Device Role / Timing Role: Uni-directional TVS mounted directly at power entry connector. Use Value: Absorbs 500 W pulses without degradation, maintaining output regulation and eliminating need for secondary filtering. |
Use Scenario: Safeguarding Ethernet PHY interfaces and PoE injectors against lightning-induced surges on twisted-pair lines. IC Role / Device Role / Timing Role: First-line transient suppressor before common-mode chokes and isolation transformers. Use Value: Clamps differential-mode surges to <70 V within nanoseconds, meeting GR-1089-CORE Level 4 telecom immunity standards. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ43A-E3/54 | Same DO-214AC (SMA) package; identical VWM/VBR/VC specs but lower IFSM (40 A vs. 70 A) and no AEC-Q101 qualification. | Preferred for space-constrained PCBs where surface-mount is mandatory; unsuitable for automotive under-hood use. | Select SMAJ43A-E3/54 only when board real estate is limited and AEC-Q101 is not required. |
| 1.5KE43A | Higher power (1500 W PPPM), larger DO-201AD package, same VWM/VBR but higher VC (71.4 V) and no AEC-Q101 or JESD201 Class 2 rating. | Used in high-energy industrial mains protection; incompatible with automotive vibration and thermal cycling requirements. | Choose 1.5KE43A only when surge energy exceeds 500 W and automotive qualification is irrelevant. |
Compared with SMAJ43A-E3/54 and 1.5KE43A, SA43HE3/54 uniquely combines AEC-Q101 qualification, 70 A IFSM, and DO-204AC through-hole robustness-making it the only choice for automotive-grade, high-reliability, through-hole TVS deployment where mechanical retention and thermal endurance are critical.
Availability
SA43HE3/54 is available at Aetrix Electronics and suitable for automotive body electronics, industrial programmable logic controllers, and telecom line card designs requiring stable component supply, long-lifecycle support, and traceable RoHS-compliant sourcing.
Supply support for SA43HE3/54 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 high-reliability diodes, MOSFETs, and passive components for automotive, industrial, and computing markets.
The SAxx series TVS diodes are engineered for robust transient suppression in harsh environments, with emphasis on AEC-Q101 qualification, stable clamping performance, and long-term parametric consistency across temperature and life cycles.
FAQ
What is the clamping voltage of SA43HE3/54 at its rated peak pulse current?
The SA43HE3/54 has a maximum clamping voltage (VC) of 69.4 V at 7.2 A peak pulse current (IPPM) under the standard 10/1000 µs waveform. This value is measured per Figure 7 in the Vishay datasheet 88378 and reflects the actual voltage seen by protected circuitry during surge events, confirming its suitability for 48 V system protection where headroom below 70 V is essential.
Is SA43HE3/54 qualified for automotive applications?
Yes, SA43HE3/54 is AEC-Q101 qualified, as explicitly stated in the "Notes" section of the Vishay datasheet (Document Number 88378, page 3). This qualification covers stress tests including HTGB, HTRB, TCT, and mechanical shock-validating its use in automotive body electronics, lighting modules, and power distribution units where reliability under thermal cycling and vibration is mandatory.
What does the "HE3" suffix indicate in SA43HE3/54?
The "HE3" suffix in SA43HE3/54 denotes RoHS-compliant construction with AEC-Q101 qualification and JESD201 Class 2 whisker resistance. Per the "MECHANICAL DATA" section of the datasheet, HE3 parts use matte tin-plated leads meeting J-STD-002 and JESD22-B102, distinguishing them from commercial-grade E3 variants which lack automotive qualification.
Can SA43HE3/54 be used in bi-directional protection circuits?
No, SA43HE3/54 is a uni-directional TVS diode, as confirmed by its part number structure (no "CA" suffix) and electrical specifications listing only uni-directional parameters (e.g., VF, IFSM). For bi-directional operation, Vishay specifies parts like SA43CA; using SA43HE3/54 in AC or floating-ground applications would result in forward conduction and potential failure.
What is the maximum operating junction temperature for SA43HE3/54?
The maximum operating junction temperature (TJ max) for SA43HE3/54 is +175 °C, as specified in the "PRIMARY CHARACTERISTICS" table of the Vishay datasheet. This rating enables reliable operation in under-hood automotive locations and high-ambient industrial settings, provided PCB layout provides adequate thermal relief via copper pour and lead length optimization per Figure 5 derating curves.
SA43HE3/54 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):
- 43V
- Voltage - Breakdown (Min):
- 47.8V
- Voltage - Clamping (Max) @ Ipp:
- 76.7V
- Current - Peak Pulse (10/1000µs):
- 6.5A
- 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)
SA43HE3/54 FAQ
1.How can I place an order for SA43HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA43HE3/54 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 SA43HE3/54 reliable?
The price and inventory of SA43HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA43HE3/54 is usually 5 days.
3.What payment methods are accepted for SA43HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA43HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA43HE3/54?
SA43HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA43HE3/54 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 SA43HE3/54?
For technical support, including SA43HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA43HE3/54 requirements.
6.How does Aetrix verify that SA43HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA43HE3/54 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 SA43HE3/54 meets industry standards.
7.What is the process for return or replacement of SA43HE3/54?
All SA43HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA43HE3/54, 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 SA43HE3/54 part is unused and in its original packaging.
Return procedure for SA43HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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