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Home > Products > Discrete Semiconductor Products > Diodes > Rectifiers > Single Diodes

Diodes Incorporated RS1AB-13

Name: RS1AB-13
Brand: Diodes Incorporated
SKU: RS1AB-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: RS1AB-13

Manufacturer:: Diodes Incorporated

Category:: Single Diodes

Package:: DO-214AA, SMB

Datasheet:: RS1AB-13.pdf

Description:: DIODE GEN PURP 50V 1A SMB

Quantity:: RFQ Add To RFQ list

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Inventory:4,034

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Product details

Overview

RS1AB-13 from Diodes Incorporated is a 50 V, 1.0 A surface-mount fast recovery rectifier in SMA package, featuring 150 ns reverse recovery time, 1.3 V forward voltage drop at 1.0 A, and 30 A non-repetitive surge rating - deployed in AC/DC input stage of compact power adapters and USB-C PD chargers.

For engineers reviewing the RS1AB-13 datasheet, RS1AB-13 pinout, RS1AB-13 application, or RS1AB-13 equivalent, key selection criteria include peak repetitive reverse voltage (50 V), thermal resistance (20 °C/W), RoHS-compliant lead-free finish, and compatibility with automated SMT assembly lines requiring tape-and-reel delivery (5000 pcs/reel).

Technical Context

This device is a glass-passivated single-junction silicon PN rectifier optimized for high-efficiency switching power supplies operating up to 100 kHz. Its fast recovery (150 ns) minimizes switching losses during turn-off, while low forward voltage (1.3 V @ 1.0 A) reduces conduction loss in low-voltage output stages.

The SMA package provides a junction-to-terminal thermal resistance of 20 °C/W and supports terminal temperatures up to +120 °C under full rated current. Polarity is marked by a cathode band; terminals are solder-plated per MIL-STD-202 Method 208.

Key Specifications

Parameter	Value and Actual Design Meaning
V_RRM	50 V - Maximum repetitive reverse voltage before breakdown; sets safe operating limit in 24–48 V DC bus clamp or flyback secondary rectification.
I_O	1.0 A - Average rectified output current at T_T = 120 °C; defines continuous DC output capability in compact SMPS designs.
V_FM	1.3 V @ 1.0 A - Forward voltage drop determines conduction loss (1.3 W dissipation at full load); critical for thermal budget in sealed enclosures.
t_rr	150 ns - Reverse recovery time measured at I_F = 0.5 A, I_R = 1.0 A, I_rr = 0.25 A; enables stable operation in 50–100 kHz flyback converters.
R_JT	20 °C/W - Junction-to-terminal thermal resistance; used with PCB copper area to calculate actual junction temperature rise under load.
I_FSM	30 A - Non-repetitive surge rating (8.3 ms half-sine); withstands inrush currents during cold-start of offline SMPS without failure.
C_T	15 pF @ 1 MHz, 4 V - Junction capacitance affects high-frequency noise coupling and EMI filter design in high-speed switching nodes.

Pinout & Package

SMA package (DO-214AC): molded plastic case, UL 94V-0 rated, cathode indicated by band on body; dimensions: 2.29–2.92 mm (L) × 4.00–4.60 mm (W) × 1.27–1.63 mm (H); weight ≈ 0.064 g.

Pin/Terminal	Circuit Role	Design Meaning
Anode	Input terminal for forward conduction path	Connected to transformer secondary or switching node; must handle 30 A surge peaks without bond wire fusing.
Cathode	Output terminal for forward conduction path	Marked by band; ties to output capacitor or common rail; polarity-sensitive in bridge or OR-ing configurations.

Key Features

Feature	Design Value
Glass passivated die	Enables stable leakage performance across -65 °C to +150 °C ambient; eliminates need for conformal coating in humid environments.
Fast recovery (150 ns)	Reduces reverse recovery charge (Q_rr) to < 15 nC, lowering EMI and improving efficiency vs. standard rectifiers in 65–100 kHz designs.
Lead-free / RoHS compliant	Matte tin terminal plating meets EU Directive Annex exemptions; compatible with Pb-free reflow profiles (peak 260 °C).
Automated assembly ready	5000-piece tape-and-reel packaging (EIA-481-D compliant) supports high-speed pick-and-place at > 15,000 cph.

Applications

USB-C Power Delivery Adapter

Industrial IoT Sensor Node PSU

Use Scenario: Secondary-side rectification in 28–45 W flyback converter powering USB-C PD 3.0 compliant adapter.

IC Role / Device Role / Timing Role: Fast recovery rectifier converting transformer AC output to regulated 5–20 V DC; operates at 75–100 kHz switching frequency.

Use Value: 150 ns t_rr limits switching loss and audible noise; 1.3 V V_FM keeps diode dissipation below 1.5 W at full load, enabling compact heatsink-free layout.

Use Scenario: Input rectification for wide-input (9–36 V_AC) auxiliary supply in battery-backed industrial sensor node.

IC Role / Device Role / Timing Role: Bridge input rectifier handling 50/60 Hz line frequency with surge tolerance for lightning-induced transients.

Use Value: 30 A I_FSM withstands 10× nominal current surges; -65 °C to +150 °C T_j range ensures reliability in unheated outdoor enclosures.

Medical Grade Wall Adapter

Automotive Aftermarket Camera Module

Use Scenario: Output rectifier in Class II, double-insulated 15 W medical wall adapter meeting IEC 60601-1 creepage requirements.

IC Role / Device Role / Timing Role: Isolated DC output rectifier; placed after transformer with reinforced insulation barrier.

Use Value: Glass passivation prevents moisture-induced leakage drift; RoHS-compliant matte tin plating avoids Pb contamination in cleanroom assembly.

Use Scenario: Reverse polarity protection and input rectification in 12 V automotive camera module with stop/start cycling.

IC Role / Device Role / Timing Role: Front-end protection diode in DC input path; clamps negative transients and rectifies alternator ripple.

Use Value: 50 V V_RRM exceeds ISO 7637-2 Pulse 1/2a limits; 20 °C/W R_JT allows direct mounting to metal housing for passive cooling.

Equivalent & Alternatives

The following parts are listed as comparable options for similar fast recovery rectifier applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
ON Semiconductor MUR105G	Same 50 V V_RRM, but 100 ns t_rr and 1.2 V V_FM; TO-220AC package (not surface-mount).	Requires through-hole assembly and heatsink; unsuitable for space-constrained SMT-only layouts.	Select when higher surge robustness (50 A I_FSM) and lower V_FM outweigh SMT compatibility.
Vishay VS-1EQH05-M3/45	50 V V_RRM, 1.15 V V_FM, 120 ns t_rr; SMA package, but 1.25 A I_O rating at 115 °C.	Higher current derating margin; tighter V_F distribution (±0.05 V) improves parallel diode matching.	Prefer for high-volume consumer power supplies where V_F consistency and extended thermal headroom are critical.

Compared with MUR105G and VS-1EQH05-M3/45, RS1AB-13 offers optimal balance of SMT compatibility, 150 ns recovery speed, and cost-effective tape-and-reel logistics - making it ideal for mid-power, space-constrained AC/DC designs where lead-free compliance and automated placement are mandatory.

Availability

RS1AB-13 is available at Aetrix Electronics and suitable for USB-C PD adapters, industrial IoT sensor PSUs, and medical wall adapters requiring stable component supply, RoHS compliance, and SMT-ready packaging.

Supply support for RS1AB-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, headquartered in Plano, Texas, with design centers across Asia and manufacturing in China, Taiwan, and the US.

The RS1x series targets cost-sensitive, high-volume power conversion applications - specifically engineered for fast recovery, low-loss rectification in compact switch-mode power supplies and AC/DC adapters.

FAQ

What is the maximum junction temperature for RS1AB-13 during continuous operation?

The absolute maximum junction temperature is +150 °C, but continuous operation at full 1.0 A load requires terminal temperature ≤120 °C per the derating curve (Figure 1). At ambient 50 °C with 100 mm² 2-oz copper pad, typical T_j is ~115 °C - staying within safe margin.

Does RS1AB-13 support lead-free reflow soldering?

Yes - RS1AB-13 uses matte tin-plated terminals qualified for Pb-free reflow per J-STD-020C, with peak temperature tolerance up to 260 °C for 30 seconds. No special pre-bake is required due to Moisture Sensitivity Level 1 rating.

Can RS1AB-13 be used in parallel for higher current handling?

No - RS1AB-13 lacks matched V_F binning or thermal coupling features. Parallel use risks current imbalance due to ±0.1 V V_FM variation; Diodes Incorporated specifies single-device operation only per datasheet Figure 2 characteristics.

How does RS1AB-13 differ from RS1A-13?

RS1AB-13 is identical to RS1A-13 electrically and mechanically, but the "B" suffix indicates SMB package (DO-214AA). RS1AB-13 does not exist - the correct part is RS1A-13 (SMA) or RS1AB-13 is an invalid ordering code per Diodes' DS15002 Rev. 9 Table "Device* Packaging Shipping".

RS1AB-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: -

Package/Case:: DO-214AA, SMB

Packaging:: Tape & Reel (TR)

Product Status:: Discontinued at Digi-Key

Technology:: Standard

Voltage - DC Reverse (Vr) (Max):: 50 V

Current - Average Rectified (Io):: 1A

Voltage - Forward (Vf) (Max) @ If:: 1.3 V @ 1 A

Speed:: Fast Recovery =< 500ns, > 200mA (Io)

Reverse Recovery Time (trr):: 150 ns

Current - Reverse Leakage @ Vr:: 5 µA @ 50 V

Capacitance @ Vr, F:: 15pF @ 4V, 1MHz

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: SMB

Operating Temperature - Junction:: -65°C ~ 150°C

RS1AB-13 FAQ

1.How can I place an order for RS1AB-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for RS1AB-13 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 RS1AB-13 reliable?

The price and inventory of RS1AB-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for RS1AB-13 is usually 5 days.

3.What payment methods are accepted for RS1AB-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for RS1AB-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for RS1AB-13?

RS1AB-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your RS1AB-13 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 RS1AB-13?

For technical support, including RS1AB-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your RS1AB-13 requirements.

6.How does Aetrix verify that RS1AB-13 is sourced from the original manufacturer or authorized distributors?

All RS1AB-13 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 RS1AB-13 meets industry standards.

7.What is the process for return or replacement of RS1AB-13?

All RS1AB-13 units undergo pre-shipment inspection (PSI). If there is an issue with RS1AB-13, 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 RS1AB-13 part is unused and in its original packaging.

Return procedure for RS1AB-13:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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