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Vishay General Semiconductor - Diodes Division SA48HE3/54
- Part No.:
- SA48HE3/54
- Manufacturer:
- Vishay General Semiconductor - Diodes Division
- Category:
- TVS Diodes
- Package:
- DO-204AC, DO-15, Axial
- Datasheet:
-
SA48HE3/54.pdf
- Description:
- TVS DIODE 48VWM 85.5VC DO204AC
- Quantity:
- Payment:
- Shipping:
Inventory:4,701
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Product details
Overview
SA48HE3/54 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 48 V stand-off voltage (VWM), 53.3–58.9 V breakdown voltage (VBR) at 1 mA, 77.4 V maximum clamping voltage (VC) at 6.5 A peak pulse current, 500 W peak pulse power (10/1000 µs), and AEC-Q101 qualification for automotive-grade reliability.
For engineers reviewing the SA48HE3/54 datasheet, SA48HE3/54 pinout, SA48HE3/54 application, or SA48HE3/54 equivalent, this part is selected for robust transient suppression in 48 V automotive subsystems, industrial power supplies, and sensor interface circuits where low-leakage, fast response (<1 ns), and high surge immunity are required.
Technical Context
The SA48HE3/54 operates as a uni-directional avalanche diode, triggered when reverse voltage exceeds its VWM = 48 V and fully clamps within nanoseconds to limit transients to ≤77.4 V at 6.5 A. Its glass-passivated junction ensures stable breakdown characteristics and low incremental surge resistance.
It supports repetitive surge events with 0.01% duty cycle under 10/1000 µs waveform, dissipates up to 3.0 W continuously on infinite heatsink at TL = 75 °C, and withstands 70 A non-repetitive forward surge (10 ms half-sine), making it suitable for load-dump and ISO 7637-2 pulse 5a/b protection.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 48 V - Maximum continuous reverse operating voltage before clamping begins; defines safe DC rail margin for 48 V systems. |
| VBR (min/max) | 53.3 V / 58.9 V at IT = 1 mA - Confirmed breakdown range ensures reliable triggering across temperature and unit variation. |
| VC @ IPPM | 77.4 V at 6.5 A - Clamping voltage under 10/1000 µs surge; limits downstream IC stress to safe levels in 48 V bus protection. |
| PPPM | 500 W - Peak pulse power handling capability; meets ISO 7637-2 Level III/IV transient energy requirements. |
| IFSM | 70 A - Non-repetitive forward surge rating; supports load-dump survival without degradation. |
| TJ max | 175 °C - Maximum junction temperature; enables operation in under-hood automotive environments. |
| Leakage ID | 1.0 µA at VWM - Ultra-low reverse leakage preserves battery life in always-on vehicle modules. |
Pinout & Package
SA48HE3/54 uses the DO-204AC (DO-15) axial leaded package: molded epoxy case with matte tin-plated leads, RoHS-compliant, AEC-Q101 qualified, and UL 94 V-0 rated. Polarity is marked by a cathode band on the body.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (unmarked end) | Forward conduction terminal | Connected to lower-potential side (e.g., ground or return path) in uni-directional TVS configuration. |
| Cathode (banded end) | Reverse-biased clamping terminal | Connected to protected line (e.g., 48 V rail); conducts avalanche current during overvoltage events. |
Key Features
| Feature | Design Value |
|---|---|
| Glass-passivated junction | Ensures stable VBR tolerance and long-term reliability under thermal cycling and humidity stress. |
| AEC-Q101 qualification | Validated for automotive applications including engine control, body electronics, and ADAS sensors per stress test requirements. |
| 500 W peak pulse power (10/1000 µs) | Withstands high-energy transients such as alternator load dump and inductive switching spikes without failure. |
| Low clamping ratio (VC/VBR ≈ 1.37) | Minimizes voltage overshoot during clamping-critical for protecting 60 V-rated MOSFETs and microcontrollers. |
| Solderable per J-STD-002/JESD 22-B102 | Compatible with standard wave and reflow soldering processes; matte tin plating prevents whisker growth (JESD 201 Class 2). |
Applications
| Automotive Power Distribution | Industrial 48 V DC Bus Protection |
|---|---|
Use Scenario: Protecting fuse box electronics and junction box controllers from load-dump transients during alternator disconnection. IC Role / Device Role / Timing Role: Primary clamping device placed between 48 V supply rail and ground, absorbing >500 W surges within <1 ns. Use Value: Prevents latch-up or permanent damage to PMICs and CAN transceivers exposed to ISO 7637-2 Pulse 5a (100 V, 400 ms). |
Use Scenario: Safeguarding programmable logic controllers (PLCs) and motor drives powered from 48 V telecom or data center backup supplies. IC Role / Device Role / Timing Role: Standoff-rated TVS mounted at board entry point to shunt inductive kickback from solenoid drivers and relay coils. Use Value: Limits transient voltage to ≤77.4 V, enabling use of cost-optimized 80 V MOSFETs instead of 100 V+ devices. |
| Automotive Sensor Interface Protection | Telecom DC-DC Converter Input Stage |
Use Scenario: Shielding LIN bus transceivers and temperature sensors in battery management systems from ESD and cable discharge events. IC Role / Device Role / Timing Role: Uni-directional TVS placed on VCC line upstream of LDO regulators, with cathode tied to 48 V rail. Use Value: 1.0 µA leakage at 48 V avoids measurable quiescent current increase-essential for low-power always-on monitoring nodes. |
Use Scenario: Front-end protection for isolated 48 V-to-12 V DC-DC modules in 5G base station power shelves. IC Role / Device Role / Timing Role: First-line transient suppressor before input filter capacitors and active rectification stage. Use Value: 53.3–58.9 V VBR range provides precise coordination with upstream fuses and downstream OVP thresholds. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SMAJ48A-E3/52 (Vishay) | Same VWM = 48 V, but SMA package (surface-mount); lower PPPM = 400 W; VC = 77.4 V @ 5.2 A. | Used where PCB space is constrained and automated SMT assembly is required; not suitable for through-hole or high-vibration environments. | Select SMAJ48A-E3/52 only if board layout mandates SMD footprint and surge energy remains ≤400 W. |
| 1.5KE48A (ON Semiconductor) | Same DO-204AC package and VWM = 48 V, but higher VC = 79.4 V @ 6.3 A; PPPM = 1500 W; no AEC-Q101 qualification. | Applicable in industrial power supplies where automotive qualification is unnecessary and higher surge margin is prioritized. | Choose 1.5KE48A when AEC-Q101 is not required and system-level testing confirms 79.4 V clamping is acceptable for downstream components. |
Compared with SA48HE3/54, SMAJ48A-E3/52 trades mechanical robustness and automotive qualification for compact size, while 1.5KE48A offers higher surge capacity at the expense of tighter clamping precision and automotive compliance-making SA48HE3/54 optimal for safety-critical 48 V automotive nodes requiring validated reliability.
Availability
SA48HE3/54 is available at Aetrix Electronics and suitable for automotive power distribution, industrial 48 V DC bus protection, and telecom DC-DC converter input stages requiring stable component supply, long-term lifecycle support, and AEC-Q101 traceability.
Supply support for SA48HE3/54 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, MOSFETs, optoelectronics, and passive components with emphasis on reliability, efficiency, and application-specific performance.
The SAxxA series is engineered for robust transient suppression in harsh environments-specifically targeting automotive, industrial, and telecom power systems where failure due to voltage surges must be eliminated.
FAQ
What is the clamping voltage of the SA48HE3/54 under a 10/1000 µs surge?
The SA48HE3/54 has a maximum clamping voltage (VC) of 77.4 V at 6.5 A peak pulse current (IPPM) under the standardized 10/1000 µs waveform. This value is measured per Figure 7 in Vishay document 88378 and defines the upper voltage limit imposed on protected circuitry during transient events. The SA48HE3/54 maintains this clamping performance across its full operating temperature range.
Is the SA48HE3/54 suitable for automotive applications?
Yes, the SA48HE3/54 is AEC-Q101 qualified and explicitly rated for automotive use. Its DO-204AC package, 175 °C maximum junction temperature, and validation against temperature cycling, humidity, and mechanical shock make it appropriate for engine control units, body control modules, and ADAS sensor power rails. The HE3 suffix denotes AEC-Q101 qualification per Vishay's ordering nomenclature.
What does the "HE3/54" suffix mean in SA48HE3/54?
In SA48HE3/54, "HE3" indicates RoHS-compliant construction with AEC-Q101 qualification and JESD 201 Class 2 whisker resistance; "/54" specifies the preferred package code for 13-inch paper tape and reel packaging with 4000 units per reel. This ordering format aligns with Vishay's documented nomenclature in revision 18-Sep-12 of document 88378.
How does the SA48HE3/54 compare to bi-directional TVS diodes like SA48CA?
The SA48HE3/54 is uni-directional and intended for DC rail protection with polarity-sensitive placement (cathode to line), whereas SA48CA is bi-directional and used for AC or floating signal lines. SA48HE3/54 offers lower leakage (1.0 µA vs. 5.0 µA for SA48CA at VWM) and is optimized for 48 V unidirectional systems like automotive power networks-making SA48HE3/54 unsuitable as a drop-in replacement for SA48CA in AC-coupled applications.
What is the maximum steady-state power dissipation for SA48HE3/54?
The SA48HE3/54 has a maximum steady-state power dissipation (PD) of 3.0 W when mounted on an infinite heatsink at lead temperature (TL) = 75 °C, per Figure 5 in Vishay document 88378. This rating decreases linearly above 75 °C and must be derated for real-world PCB layouts using the provided derating curve-SA48HE3/54 is not intended for continuous power dissipation but for transient energy absorption.
SA48HE3/54 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):
- 48V
- Voltage - Breakdown (Min):
- 53.3V
- Voltage - Clamping (Max) @ Ipp:
- 85.5V
- Current - Peak Pulse (10/1000µs):
- 5.8A
- 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)
SA48HE3/54 FAQ
1.How can I place an order for SA48HE3/54 through Aetrix?
Please submit a Request for Quotation (RFQ) for SA48HE3/54 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 SA48HE3/54 reliable?
The price and inventory of SA48HE3/54 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SA48HE3/54 is usually 5 days.
3.What payment methods are accepted for SA48HE3/54?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SA48HE3/54 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SA48HE3/54?
SA48HE3/54 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SA48HE3/54 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 SA48HE3/54?
For technical support, including SA48HE3/54 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SA48HE3/54 requirements.
6.How does Aetrix verify that SA48HE3/54 is sourced from the original manufacturer or authorized distributors?
All SA48HE3/54 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 SA48HE3/54 meets industry standards.
7.What is the process for return or replacement of SA48HE3/54?
All SA48HE3/54 units undergo pre-shipment inspection (PSI). If there is an issue with SA48HE3/54, 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 SA48HE3/54 part is unused and in its original packaging.
Return procedure for SA48HE3/54:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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